High ACoS on Amazon: What Causes It and How to Lower It Fast

Are you struggling with high ACoS on Amazon and watching your ad budget burn with little to show for it? 

Many sellers face this challenge as advertising costs on Amazon keep rising. That cost surge has many sellers asking how to reduce ACoS while still driving sales. The good news is, you can lower a high ACoS quickly without killing your sales momentum. 

We will break down exactly what ACoS is, why it matters, what counts as a “high” ACoS (and when it’s truly a problem), the common causes of a bloated ACoS, and seven fast fixes to high ACoS Amazon PPC performance.

Let’s dive in and get your ACoS under control, so you can start sustainably improving Amazon PPC profitability.

Table of Contents

1. What Is ACoS and Why Does It Matter on Amazon

2. What Is Considered a High ACoS (And When It’s a Problem)

3. Common Causes of High ACoS on Amazon

4. How High ACoS Hurts Your Profitability and Rankings

5. 7 Fast Fixes to Lower Your Amazon ACoS

6. When to Accept High ACoS (and How to Balance It Strategically)

7. How No Fluff Helps Brands Lower ACoS Without Killing Sales

8. Conclusion

9. Frequently Asked Questions

What Is ACoS and Why Does It Matter on Amazon

ACoS (Advertising Cost of Sales) is a key metric in Amazon advertising that measures how much you spend on ads to generate $1 of revenue from those ads. 

In formula terms, ACoS = (Ad Spend ÷ Ad Revenue) × 100%. For example, if you spend $50 on ads and they produce $100 in attributed sales, your ACoS is 50%​. 

ACoS basically tells you the percentage of your sales eaten up by ad costs. The lower the ACoS, the more cost-efficient and profitable your ad campaigns are. 

A high ACoS means you’re paying a lot for the sales you’re getting – possibly too much.

Why does ACoS matter? 

In a nutshell, it’s a proxy for ad profitability and efficiency. Amazon PPC is essentially a balancing act between ad spend and sales revenue. 

If you spend $100 on ads and only get $100 in sales, your ACoS is 100%, and you’ve broken even on those sales (not accounting for product cost). 

If your ACoS is above 100%, you’re actually paying more for ads than the revenue they bring in – an obvious problem. Even at lower percentages, ACoS directly affects your profit margins. 

For instance, an ACoS of 50% means half of your sales revenue is going back into ads, which might leave little profit once you subtract product costs, Amazon fees, etc. 

This is why sellers watch ACoS like a hawk: it’s one of the clearest indicators of whether your Amazon advertising is efficient or just bleeding cash.

ACoS vs. ROAS

ROAS (Return on Ad Spend) is essentially the inverse of ACoS. While ACoS shows ad spend as a percentage of revenue, ROAS tells you how many rupees (or dollars) you earn per rupee spent on ads. 

Using the earlier example ($50 spend, $100 sales), ACoS was 50%, and the ROAS would be 2.0 (meaning $2 earned per $1 spent)​. 

Both metrics reflect the same relationship in opposite ways. Amazon typically displays ACoS in the advertising console, but some marketers prefer thinking in ROAS. 

An increasing ROAS corresponds to a decreasing ACoS, and vice versa. The key is understanding your ad spend-to-sales efficiency: whether you express it as ACoS or ROAS, it affects your bottom line.

ACoS vs. TACoS

ACoS looks at your ad-attributed sales only, but there’s another metric called TACoS (Total Advertising Cost of Sales) that many advanced sellers track. 

TACoS = (Ad Spend ÷ Total Sales) × 100%, where total sales include both advertising sales and organic (non-ad) sales. This metric gives a broader view of how your ad spend impacts your overall revenue. 

Naturally, TACoS will always be lower than ACoS for the same period, because the denominator (total sales) is larger. 

Why care about TACoS? Because it helps measure the spillover effect of advertising on organic performance. 

For example, if your ads boost your organic rankings and sales, your total sales go up relative to ad spend, lowering your TACoS. 

A rising TACoS might indicate your ads are accounting for too much of your sales (potential Amazon ad spend issues), whereas a decreasing TACoS suggests you’re gaining more organic sales for each ad dollar spent – a positive sign. 

We’ll revisit TACoS when we discuss strategy, but keep in mind that a singular focus on ACoS can sometimes be misleading. It’s one important piece of the puzzle, but not the only metric that matters for Amazon's success​.

Understanding ACoS (and related metrics like ROAS and TACoS) is the first step in optimizing your Amazon advertising. Next, we’ll look at what counts as a “good” or “bad” ACoS on Amazon – because context is everything.

What Is Considered a High ACoS (And When It’s a Problem)

Not all ACoS percentages are created equal. A 50% ACoS might be terrible for one seller but acceptable for another, depending on margins and goals. 

So, what is considered “high” ACoS on Amazon? While there’s no universal cutoff, we can use some benchmarks and common sense.

General ACoS Benchmarks

Generally speaking, an ACoS of less than 25% is viewed favorably. An ACoS ranging from 25% to 40% is often considered within the typical range, and an ACoS exceeding 40% is usually classified as high. 

In practice, many sellers aim for an ACoS in roughly the 20–30% range for day-to-day profitability. 

Amazon’s advertising guide notes that there isn’t a single “good” ACoS number – it varies by industry, product category, competition, and your profit margins​. 

If your product has a 50% profit margin, an ACoS of 40% might be quite sustainable (you’d still net 10% profit after ad costs). 

But if your profit margin is only 20%, a 40% ACoS means you’re losing money on every ad-driven sale. Thus, high ACoS is often defined as ACoS higher than your profit margin or higher than your target for profitability.

One useful concept here is “break-even ACoS.” This is the ACoS percentage at which your ad cost equals your gross profit on a product. 

For example, if your product’s profit margin (after Amazon fees, cost of goods, etc.) is 30%, then an ACoS of 30% means you’re roughly at break-even on ad sales​. If you exceed that, you’re dipping into losses on those sales. 

Most of the time, a consistently high ACoS (above break-even) is a problem because it means your ads are eroding your profit per sale. You’re essentially paying Amazon too much for the revenue you’re getting back.

However, context matters. Sometimes an ACoS that seems high is part of a deliberate strategy (more on that later). 

For instance, an ACoS of 100% sounds dreadful for profitability, but if it’s a new product launch, you might tolerate it temporarily to gain traction. 

We’ll discuss strategic high ACoS in a later section. If you find your ACoS creeping above the average ACoS Amazon sellers shoot for in your category, it’s time to investigate and take action.

To put numbers in perspective, many sellers consider an ACoS above ~40-50% to be “high” in a negative way (inefficient spend), unless they have very fat margins or specific goals. 

In contrast, an ACoS in the teens or low 20s is often considered healthy and indicative of efficient campaigns. Always adjust for your own margin: if you have a 10% margin product, even a 15% ACoS is high for you (because you’d be unprofitable). 

So, know your break-even ACoS and target ACoS. When ACoS exceeds those targets, it’s a red flag.

When is high ACoS a problem? 

In short: when it’s not by design. 

If you’re not intentionally running a high-ACoS campaign for strategic reasons (like aggressive ranking or liquidating stock), then a high ACoS usually signals inefficiency in your ads. 

It means something in your PPC approach isn’t working – maybe you’re bidding too high, targeting the wrong audience, or your product listing isn’t converting the clicks you paid for. 

A high ACoS becomes a serious problem when it consistently eats into your margins, drains your ad budget, and doesn’t yield proportional benefits (like higher organic ranking or future sales). 

In the next section, we’ll look at the common causes of high ACoS to help pinpoint what might be going wrong.

Common Causes of High ACoS on Amazon

If you’re grappling with high ACoS on Amazon, it’s essential to diagnose why. There are usually clear reasons behind an inflated ACoS. 

Let’s explore some of the top reasons for high ACoS in Amazon advertising:

1. Poor Conversion Rates (Listing Optimization Issues)

One of the biggest culprits for a high ACoS is a low conversion rate on your ads. If people click your ad but don’t end up buying your product, your advertising dollars aren’t translating into revenue, causing ACoS to shoot up. 

Low conversion can stem from poorly optimized product listings or offers. For example, poorly optimized listings and weak product copy/creatives lead to lower click-through rates and conversions​. 

If your product page has blurry images, unclear descriptions, bad reviews, or an uncompetitive price, customers who click your ad may bounce without purchasing, leaving you with ad spend and no sales. 

In other words, expensive traffic + no conversion = high ACoS. Always remember: ACoS is essentially cost per click (CPC) divided by revenue per click. 

If your revenue per click is low because few clicks convert to sales, ACoS will be high. This is why seasoned sellers say, “ACoS is a reflection of conversion rate as much as of ad cost.”

2. Expensive Clicks (High CPC Bids or Costly Keywords)

The other side of the equation is your cost per click. If you’re paying a lot for each click (maybe due to high bids or highly competitive keywords), even a decent conversion rate can result in a high ACoS. 

For instance, bidding on very broad or popular keywords like “wireless headphones” could cost you a few dollars per click. 

If your product price is only $15, you need an extraordinarily high conversion rate to keep ACoS reasonable. Overbidding is a common mistake – bidding more than necessary to win clicks can lead to unnecessarily high costs​. 

Some sellers set bids aggressively high in hopes of capturing more traffic, but end up paying for clicks that don’t convert profitably. 

The result is bad ACoS performance despite perhaps getting a lot of clicks. A related issue is not adjusting bids over time; if you set and forget your bids, you might continue to overspend on keywords that aren’t converting well.

3. Irrelevant or Broad Targeting

Targeting the wrong keywords or using overly broad match types can quickly inflate your ACoS. 

If your ads are showing up for search terms unrelated to your product, you’re essentially throwing money at uninterested audiences. 

For example, advertising a men’s running shoe on the keyword “running gear” might seem okay, but if people searching “running gear” were looking for apparel or accessories, they won’t buy your shoes. 

That’s wasted spend. Focusing on keywords not relevant to your product can waste your budget and limit conversions​. 

Automatic campaigns or broad match keywords tend to cast a wide net; without refinement, they can rack up spend on tangential searches. 

This is why we often see an Amazon campaign wasting money on search terms that never convert. 

If you review your Search Term Report and find dozens of clicks on irrelevant terms, those are directly contributing to a higher ACoS.

4. Lack of Negative Keywords

This goes hand-in-hand with the above. Ignoring negative keywords is a frequent cause of high ACoS​. 

Negative keywords tell Amazon which searches not to show your ads for. Without them, your ads might keep appearing for irrelevant or low-intent queries that don’t result in sales. 

For instance, if you sell premium leather wallets and don’t add “free” as a negative term, you might pay for clicks from people searching “free wallet” – likely tire-kickers or mistaken clicks. 

Those wasted clicks drive up your ad spend with zero sales to show, pushing ACoS higher. 

Implementing negative keywords could have prevented their ads from showing on those money-wasting searches.

5. Poor Campaign Structure (“Keyword Dumping”)

How you structure your campaigns and ad groups can impact ACoS. A common mistake is keyword dumping – throwing dozens or hundreds of keywords (across all match types) into one ad group or campaign and letting it run. 

This makes it hard to optimize because some keywords will perform well and others horribly, all under the same budget and settings. 

As a result, the bad can drag down the good. Having all keyword match types in a single ad group or too many mixed targets can restrict impressions for some and overspend on others​. It also muddles the data. 

For example, if you have a mix of broad and exact keywords in one group and the ACoS is high, it’s harder to pinpoint which are the culprits. 

A messy structure often leads to the budget being eaten up by a few expensive, poor-converting terms (raising ACoS) while better opportunities get missed. 

The same goes for mixing product targets, category targets, etc., without a strategy.

6. Not Using All Ad Types / Placements Wisely

Amazon offers Sponsored Products, Sponsored Brands, Sponsored Display, etc. If you’re not utilizing the ad type that best suits your goals or not optimizing placements, you could be missing out on cheaper conversions. 

For instance, Sponsored Product ads in top-of-search can be expensive (high CPC) but convert well, whereas Product Display ads might have lower CPC but also lower conversion. 

If a seller relies only on one ad type or placement, they might saturate that channel and see diminishing returns (rising ACoS) while ignoring other efficient options. 

On the flip side, using an ad type improperly – e.g., running Sponsored Brands Video with a poor video – could burn money. 

While this is a more nuanced cause, it boils down to inefficient allocation of spend across Amazon’s ad portfolio.

7. No Clear Goal or Strategy

This is a more general cause, but worth mentioning. If you launch campaigns without clear targets (ACoS goal, volume goal, etc.), you might overspend in pursuit of undefined success. 

Not setting clear campaign goals makes it difficult to measure and adjust performance​. One effect is that you might keep funding a campaign that’s actually not meeting your business needs (like a branding campaign that’s costing a lot without driving profitable sales). 

A high ACoS could simply indicate that the campaign’s purpose (if there is one) isn’t aligned with profitability. 

Every campaign should have a KPI – if ACoS is the primary one, define what “good” looks like and cut or tweak what doesn’t meet it.

In essence, most reasons for high ACoS boil down to two root issues: expensive clicks or low conversion (or both). A poor ACoS as a symptom with only two likely diagnoses: either your product page isn't convincing enough to seal the deal, or you're navigating in high-priced traffic lanes. The next step is understanding the consequences – why a high ACoS hurts – and then we’ll get into the actionable fixes to turn things around.

How High ACoS Hurts Your Profitability and Rankings

By now, it’s clear that a high ACoS on Amazon means you’re paying a lot for your sales. But what are the ripple effects of that? 

Let’s break down how an ongoing high ACoS can damage both your profitability and your product rankings on Amazon.

Profitability Impact

This one’s straightforward – a high ACoS eats into your profit per sale. If your ACoS is above your profit margin, you’re outright losing money on every ad-driven sale. 

Even if it’s below the margin, the higher the ACoS, the less net profit you retain. For example, suppose you sell a product for $1000 with a $300 profit after all costs. 

If your ACoS on that product is 50%, you spent $500 on ads to get the sale, which actually puts you $200 in the red. 

That’s obviously unsustainable. But even a 30% ACoS ($300 ad spend on that $1000 sale) would mean you broke even, zero profit. 

You essentially worked for Amazon’s ad platform for free. Only below 30% ACoS would you make money in that scenario. 

Now, imagine across dozens of sales, bad ACoS performance can drain the profit from your business fast. 

It means your advertising budget isn’t yielding a good return. Over time, this can lead to cash flow issues, as you pour money into campaigns and get little net revenue back. 

It can also force you to raise your product prices (to compensate for ad spend), which might reduce your competitiveness on Amazon.

Beyond the per-sale impact, a high ACoS can soak up your budget on fewer sales, limiting how much you can reinvest. For instance, $1000 in ad spend at a 50% ACoS yields $2000 in sales, whereas that same budget at a 25% ACoS would yield $4000 in sales. 

More sales usually mean more profit. So an inefficient ACoS is an opportunity cost – those wasted rupees could have generated a lot more revenue (and profit) if ACoS were better controlled. 

High ACoS may also mean you have to scale back advertising (because it’s unprofitable), which can give competitors an opening to steal market share. 

All in all, high ACoS = low ROI, and low ROI eventually means you either fix the issue or you can’t afford to advertise.

Ranking and Organic Impact

The relationship between advertising ACoS and organic ranking is a bit more indirect, but very real. Amazon’s A9 algorithm rewards products that generate sales, particularly high conversion rates on relevant searches. Here’s how a high ACoS can hurt your ranking:

1. Lower Conversion Rate Signals

A high ACoS often indicates that for a given keyword, your conversion rate is low (since you’re spending a lot per sale). 

Amazon notices when a bunch of shoppers click your listing (via an ad) and don’t buy – it’s a signal that maybe your product isn’t what they wanted for that search term. 

This can negatively affect your ad rank (Quality Score equivalent) and your organic rank for that keyword. Amazon wants to show products (in ads or organic results) that consumers are likely to buy. 

If your ads have a low conversion, Amazon might charge you more for clicks (further worsening ACoS) or show you less often. 

Organically, a low conversion on a keyword could drop your listing’s placement over time.

2. Lost Sales Velocity

High ACoS can force you to cut back on ads to avoid losing money. If you dial down your campaigns, you might see a dip in overall sales velocity.

Sales velocity (consistent sales over time) is a driver of organic ranking on Amazon. Products that sell more tend to rank higher. 

So if a bloated ACoS makes you pause or reduce ads (thus reducing sales), your organic rank can slip as a result. 

It’s a bit of a Catch-22: you need ads to drive sales velocity, but if those ads are too inefficient, you can’t afford to keep them running at the same level.

3. Wasted Spend vs. Strategic Spend

Another angle – every rupee wasted on high-ACoS campaigns is a rupee not spent on potentially rank-boosting campaigns. 

For example, let’s say you have two campaigns: one is targeting very broad keywords with 100% ACoS, the other is targeting your top relevant keywords with 20% ACoS. 

If you don’t control the high ACoS campaign, it might consume most of your budget and yield few sales. Meanwhile, the efficient campaign (that likely drives good sales and could improve rank for those keywords) is budget-starved. 

In essence, high ACoS in parts of your account can rob more efficient, rank-building campaigns of resources. This hurts your overall growth and ranking potential.

4. TACoS and the Bigger Picture

We mentioned TACoS earlier – if your ACoS is high but it’s not translating into better organic sales (i.e., TACoS stays high or goes higher), that’s a bad sign for long-term ranking. 

Ideally, ad spend should help boost organic presence, which would show up as a lower TACoS over time (more organic sales coming in). 

But if high ACoS just persists without moving the needle on organic, it means you’re not getting that ancillary benefit. 

You’re just overpaying for each sale. Amazon campaigns that are wasting money on non-converting ads do nothing for your organic rank; if anything, it may hurt it, as described above.

In summary, a high ACoS will hurt your profitability immediately and can hurt your rankings gradually through lower conversion and reduced sales momentum. 

It’s like driving a car with the handbrake on – you can do it, but you’ll go slower and damage the car in the long run. 

The goal is to get that handbrake off and let your advertising dollars actually propel your business forward. Next, we’ll get into the actionable part: how to lower your ACoS fast, without killing your sales (so you don’t hurt your ranking or growth in the process).

7 Fast Fixes to Lower Your Amazon ACoS

Enough theory – let’s talk solutions. How do you quickly bring down a high ACoS on Amazon without gutting your sales? 

Here are seven proven, fast-acting fixes to ACoS optimization that Amazon sellers can apply. These tactics focus on cutting wasted spend and boosting conversion, so your ACoS drops and your sales stay strong (or even increase).

1. Lower Your Bids on High-ACoS Keywords and Placements

One of the quickest levers to pull is bid adjustment. If certain keywords or product targets have an ACoS that’s through the roof, reduce your bids for those targets. This will immediately lower your cost per click. 

Remember, ACoS is largely a function of CPC relative to conversion. By bidding down, you pay less for each click, which can dramatically improve ACoS if those clicks were overpriced. 

Focus on the worst offenders: identify keywords with high spend and few sales (high ACoS) in your advertising reports. 

Lower them by a significant percentage (e.g., cut bids by 20-30% or more) and monitor the impact. 

Amazon’s dynamic bidding will also respond – if you were often winning the top-of-search at a high CPC, you might now appear a bit lower or less frequently, but you’ll spend much less for each click. 

Often, those high ACoS keywords are ones where you were overbidding anyway, just to win a spot that wasn’t converting profitably. By backing off, you lose some unprofitable clicks and make each conversion cheaper.

(Bonus tip: Use placement reports to see if certain placements (e.g., Top of Search vs. Rest of Search) are driving up ACoS. If you’ve set placement multipliers (like +50% for top of search) and it’s yielding poor ACoS, dial those multipliers down. You can still appear in those slots, just at a more reasonable bid. The impact of bid lowering can usually be seen within days – your spend per click drops immediately, and if sales volume holds or only slightly dips, your ACoS will improve accordingly. This is a “fast fix” that doesn’t require new tools or campaigns, just a keen eye and a willingness to spend less on what’s not working.)

2. Prune and Pause Unprofitable Keywords/Campaigns (“Keyword Removal”)

Sometimes the fastest way to improve your overall ACoS is to stop the bleeding. Identify any keywords, ad groups, or even entire campaigns that are consistently wasting money (high spend, few or zero sales). 

Don’t be afraid to pause or remove them. This is essentially a more extreme step than lowering bids – it means $0 more will go to that target. 

According to one Amazon advertising guide, removing poor-performing keywords is one of the fastest ways to decrease ACoS, though you should be careful to remove the right ones. Look at your data: if a keyword has spent $500 and got one sale of $200 (ACoS 250%), that’s a prime candidate to cut. 

By pausing it, you immediately prevent further wasted spend. Yes, you lose any potential sales that keyword might have generated, but if it hasn’t performed despite spend, it’s not likely to suddenly turn around.

The same logic applies at the campaign level. Perhaps you have an Auto campaign or a broad match campaign that’s spending a lot with poor results. 

If it’s not crucial for your strategy, pause it (or at least reduce its budget significantly). Reallocate that budget to campaigns that have better ACoS or potential. 

This pruning can quickly bring down your account’s average ACoS because you’ve literally removed the high-ACoS contributors from the equation. 

Think of it like pruning dead branches off a tree so the healthy branches can flourish. 

(Caution: Don’t cut keywords that do drive a lot of sales unless you have to – even if ACoS is high, consider if they are important for revenue. For those, try other optimizations like bid changes or listing improvements first. But for the truly dead-weight keywords, pausing them can only help your efficiency.)

3. Add Negative Keywords to Eliminate Wasted Spend

If you haven’t done this already, adding negative keywords is one of the fastest ways to cut out irrelevant clicks that inflate ACoS. 

Negative keywords prevent your ad from showing on certain search terms. 

Go through your search term report (or targeting reports for auto campaigns) and identify terms that spent significant money without conversions. Those are prime candidates to negate. 

For example, if you sell premium coffee and see a lot of clicks on “cheap coffee mugs” (which don’t convert for you), add “mugs” or “cheap” as negatives where appropriate. 

By doing so, you stop future ad spend on those terms cold turkey. One case study showed a brand spending $1700 on non-converting search terms – negatives could have saved most of that money.

Add negatives at the campaign or ad group level depending on the scope. 

It’s wise to add broad or phrase match negatives for patterns you want to exclude (like “free,” “cheap,” “kids” if your product is not for kids, etc.). 

This immediately frees up your budget to spend on terms that actually have a shot at converting. 

The result? Your advertising money goes toward more relevant clicks, which should increase conversion rate and lower wasted spend – a recipe for a better ACoS. 

Negatives are not a one-and-done task; continuously monitor new search terms each week and keep adding to the negative list for any junk terms that slip through. 

Over time, this ACoS optimization practice will trim the fat and make your campaigns lean and efficient.

4. Refine Targeting and Match Types (Focus on Relevancy)

Another fast fix is to refine who you target and how. Broadly targeted campaigns (autos, broad matches) might be casting too wide a net and pulling in irrelevant clicks. 

You can quickly lower ACoS by tightening your targeting. There are a few ways to do this:

Shift from Broad to Phrase/Exact

If you notice certain broad match keywords have high ACoS, try using phrase or exact versions of those keywords instead. 

This gives you more control to show on queries that closely match your product. 

For example, instead of broad match “running shoes,” maybe target phrase match “men’s running shoes” or exact match “[brand name] running shoes” if that’s a known converter. This reduces the chance of odd variations triggering your ads.

Use Product Targeting for High Relevance

In Sponsored Products, consider product targeting ads aimed at specific competitor ASINs or categories where your product is highly relevant. 

Often, product targeting can yield a lower CPC and strong conversion if your product compares favorably (e.g., advertising on a similar item that’s higher priced or lower rated can win you that sale). It’s a way to siphon very relevant traffic.

Segment by Performance

Divide your campaigns by performance levels. One pro tip from advanced sellers is to create segments: campaigns that are under your average ACoS vs. those that are above it. 

For the high-ACoS segment, refine those further – either cut keywords or make them more specific. Meanwhile, you can put more budget into the low-ACoS segment. 

This segmentation approach quickly improves overall efficiency by focusing spend where it works best.

The more relevant the keyword or placement to your product, the higher the chance of conversion and the lower the ACoS. By refining targeting, you eliminate a lot of “spray and pray” spending. 

This can sometimes increase your conversion rate overnight (because fewer unrelated people see your ad), which directly lowers ACoS. You might sacrifice some impressions or clicks volume, but that’s fine if those clicks weren’t converting anyway. We want quality over quantity here.

5. Optimize Your Product Listing (Boost Conversion Rate)

Up to now, we’ve mostly talked about cutting costs or waste. Equally important is increasing your revenue per click – in other words, boosting the conversion rate and average order value when people land on your listing. 

Optimizing your product listing is a must-do fix that can have a fast impact on ACoS. 

Here’s what to optimize quickly:

Product Title and Main Image

Make sure your title is clear and relevant to the ad keywords, and your main image is high-quality, attractive, and meets Amazon guidelines. 

A more compelling title/image combo will improve your click-through rate and conversion. If your ad is getting clicks but no conversions, the issue might be revealed after the click – maybe the image or title on the listing page isn’t as appealing as it looked in the ad thumbnail.

Pricing and Promotions

If possible, adjust your price to be more competitive. Even a small drop or a limited-time coupon can improve conversion rates significantly. 

Shoppers on Amazon are price-sensitive and notice deals. 

If your ACoS is high due to low conversions, try testing a more attractive price point – the increased sales volume can sometimes compensate or even improve profit despite the lower price (due to advertising efficiency).

Bullet Points and Descriptions

Ensure your bullets quickly communicate your product’s key benefits and relevance to the shopper’s search. 

If someone clicked an ad for “wireless earbuds noise cancelling,” but your listing buried the noise-cancelling feature in bullet #5, they might not realize your product meets their need. 

Make sure your copy aligns with the intent of the keywords you’re targeting, so those clicks turn into buys.

Reviews and Ratings

While you can’t magically increase reviews overnight, do what you can to manage this aspect – for instance, ensure you have enough reviews (even if it’s just getting from 0 to 5) before heavily advertising. 

If your ad spend far outpaces your social proof, conversion will suffer. High ACoS for new products is common due to lack of reviews; sometimes the fix is pausing ads until you gather more credibility, or using other tactics like Vine or small campaigns to get initial reviews.

Amazon emphasizes looking beyond just ACoS: review your other metrics like CTR and conversion rate (CVR) to figure out where the funnel is breaking​. 

By optimizing your listing content, images, and offer, you improve the conversion rate, which means more sales per click. This is a fast fix in the sense that changes to a listing can immediately affect buyer behavior. 

Often, within days of a change (once Amazon updates your content and you start getting traffic), you can see a conversion rate uptick. 

And as we know, better conversion = lower ACoS. 

It’s a virtuous cycle: a better listing also improves your organic ranking and Quality Score, potentially lowering your CPC bids needed, further helping ACoS. So, while it’s not a “PPC tweak,” listing optimization is absolutely central to fixing high ACoS.

6. Adjust Your Budget Allocation (Shift Spend to Low-ACoS Winners)

When time is of the essence, you want every dollar of ad spend to work as hard as possible. Take a look at your campaigns and identify which ones have a relatively low ACoS (or a good ACoS for their goal) and which ones are high. 

A quick way to lower overall ACoS is to reallocate the budget toward the winners and away from the losers. 

Amazon allows you to set daily budgets per campaign. If you have a campaign with 15% ACoS that keeps running out of budget midday, while another campaign with 60% ACoS is draining $5,000 a day, it’s time to redistribute. 

Increase budgets on the efficient campaigns so they can capture more sales volume, and decrease budgets on the inefficient ones (or pause as noted earlier).

By doing this, you’ll drive a higher proportion of your total spend into areas that yield a better return, thus lowering the blended ACoS. 

This can be done instantly in Campaign Manager. Just be cautious: if you completely cut budget from a campaign that does bring some sales, ensure those sales can be picked up elsewhere. 

Ideally, you find that some campaigns can be safely starved because their contribution can be made up by better campaigns. 

Amazon’s data analysis tools or third-party software can help pinpoint which campaigns or ad groups are raising your account’s average ACoS. 

One advanced method is to calculate the weighted ACoS of each campaign and simulate how reducing spend on certain ones improves the total. 

By prioritizing budget to campaigns that are under your target ACoS and limiting spend on those over, you’re effectively putting your money where it works. 

Sellers who do this often see an immediate improvement in their overall account ACoS the next day. It’s like filling your bucket from the non-leaky faucets instead of the leaky one. 

Keep an eye on total sales, though – we want to lower ACoS without a big drop in sales. 

If cutting the budget on a high-ACoS campaign causes a steep sales decline, that campaign might have been important for volume (perhaps you need to optimize it rather than cut it completely). So use this tactically and monitor outcomes.

7. Leverage Remarketing and Long-Tail Keywords (Cheaper Conversions)

Our last fast fix is actually to add something: campaigns or targets that are known for low ACoS opportunities. It might sound counterintuitive to add campaigns to lower ACoS, but hear us out.

Some campaign types on Amazon can yield very efficient ACoS, essentially bringing in inexpensive conversions that offset other costs. Two examples are:

Sponsored Display Remarketing

If you’re brand is registered, you can run Sponsored Display audiences campaigns that show your ads to shoppers who viewed your product (or similar products) but didn’t purchase. 

These remarketing campaigns often have lower CPCs and can have an excellent conversion rate because the audience is already interested. 

Many marketers ignore these, but they can have some of the lowest ACoS in your account​. 

By launching a retargeting campaign, you might capture additional sales from warm prospects at a low cost, which brings down your blended ACoS.

Long-Tail Specific Keywords

Identify very specific, long-tail keywords from your search term report that have 1 or 2 sales with low ACoS. Harvest those into a dedicated manual campaign. 

Long-tail terms (e.g., “wireless earbuds for small ears” vs. “wireless earbuds”) usually have lower competition, hence cheaper clicks, and if they already converted for you once, chances are they can do it again. 

These often fly under the radar in broad campaigns. By isolating and scaling them, you improve efficiency. 

You might find that a handful of low-ACoS keywords can drive a decent chunk of sales when given more budget, thus improving your overall performance.

Targeting your brand name

Bidding on your brand keywords (e.g., “<YourBrand> earbuds”) usually yields a very low ACoS because conversion is high (people are already looking for you). 

It’s usually cheap as well. Those sales can offset higher ACoS elsewhere. The increase in total ad sales at a low cost will mathematically drop your overall ACoS. 

(Just be mindful that you’re probably already getting those sales organically, so it’s more of a defensive/visibility play than a growth tactic – but it can help your ACoS metric.)

The key is to make these changes without overly compromising your sales. We’ve aimed for that balance here. Next, let’s consider the flip side: are there times when a high ACoS isn’t actually a bad thing?

When to Accept High ACoS (and How to Balance It Strategically)

By now, we’ve hammered home that a low ACoS is generally desirable. But are there situations where a high ACoS might be acceptable, or even planned? 

Yes – in certain cases, you might strategically tolerate a higher ACoS in pursuit of other goals. The crucial part is knowing when it’s a conscious choice versus when it’s a problem. Let’s go over when you might accept a high ACoS and how to balance it.

1. New Product Launches – Investing in Rank

When launching a new product on Amazon, your primary goal is often to generate sales velocity and accumulate reviews, even if that means slim or negative profits initially. 

In launch mode, it’s common to have a high ACoS. You’re essentially “buying” ranking and market exposure. If you launch and aim for a super low ACoS, you may not get enough visibility to kickstart the product. 

For example, you might willingly spend $500 in ads to get $500 in sales (ACoS 100%) for a few weeks, knowing that those early sales will improve your organic ranking, which later yields organic sales with no ad cost. 

Many sellers view launch ad spend as an investment or a form of “buying data.” A high ACoS is acceptable if your goal is volume and speed for faster growth. 

The key is to monitor TACoS in this phase – you want to see that over time, your organic sales (total sales) are growing, which should cause TACoS to drop even if ACoS on the ads is high. 

This indicates your ads are boosting overall market presence. Once you’ve achieved initial traction, you can gradually pull back ACoS to profitable levels. 

In summary, during a launch or aggressive growth phase, volume > efficiency, and a high ACoS is a calculated risk you take for long-term gain.

2. Branding and Awareness Campaigns

Not every campaign’s goal is immediate profit. Sponsored Brands (headline ads) or video ads, for instance, often serve to increase brand awareness and drive top-of-funnel traffic. 

These might have higher ACoS because not everyone buys on the first click – some are discovering your brand. 

If you’re running a branding campaign, you might judge success on metrics like impressions, new-to-brand customers, or total sales lift, rather than ACoS alone. 

Amazon ACoS shouldn’t be the only KPI if you aim to raise brand awareness​. In these cases, you accept a higher ACoS as long as it’s within your marketing budget for exposure. 

For example, a big brand might spend at a 70% ACoS on Sponsored Brands just to dominate their category visuals, knowing that many shoppers will see their logo and possibly click their products later organically. 

As a smaller seller, you might not do this at scale, but perhaps you’ll tolerate higher ACoS on certain keywords that are important for brand positioning (like showing up for a competitor’s brand name or a broad category term) – essentially a defensive or awareness play. 

The balancing act here is to have other campaigns running efficiently to subsidize these costs. Which brings us to…

3. Balancing High ACoS with Low ACoS (TACoS Perspective)

If you have some campaigns with high ACoS for strategic reasons, you can balance them with other campaigns with low ACoS so that overall profitability remains okay. 

This is where looking at TACoS (Total ACoS) helps. Suppose 30% of your ad budget is going to a high-ACoS campaign (say, a product launch or a broad keyword campaign), and the other 70% is going to tried-and-true campaigns that are very profitable. 

Your overall business might still be doing well because those efficient campaigns carry the weight. 

As long as your total advertising cost as a percentage of total sales (TACoS) is within a healthy range, you might be comfortable. 

It’s even possible for your ACoS to be high but your business still profitable – how? If a large portion of your sales are organic (unpaid) or from very efficient ads, they offset the expensive ads. 

Sellers must be aware of TACoS to measure overall effectiveness. For instance, if your ACoS on ads is 50% but only 20% of your total sales come from ads, your TACoS is 10%, which could be fine. This scenario might happen if your ads are primarily fueling additional organic sales. 

In such a case, you might live with the high ACoS on the ad side as long as your total business margins are intact.

4. Liquidation or Seasonal Push

Another scenario – you’re trying to liquidate inventory or drive a seasonal push (e.g., holiday sales, Prime Day). 

You might accept high ACoS because your goal is to sell through stock or capitalize on a short-term spike in demand, even at lower profit per sale. 

Perhaps the products you’re liquidating you just want to convert to cash, so you’ll spend what it takes in ads to move them. 

Or during Black Friday, you might overspend on ads knowing conversion rates are higher and you just want maximum visibility (though usually big sales events can lower ACoS due to high conversion, but if competition is fierce, CPCs go up too). 

In these limited-time cases, you weigh the pros and cons – is the high ACoS worth achieving the business objective? If yes, it’s a strategic decision, not a failure of optimization.

How to Balance It

If you do choose to run some high ACoS efforts, make sure you:

• Set a cap or a timeframe. Don’t just let it run indefinitely. E.g., “I’ll accept 100% ACoS for this launch for 4 weeks, then reassess”

• Monitor TACoS and profit. Ensure your overall business remains healthy. If you see even your TACoS climbing dangerously or you’re hemorrhaging cash, rein it in

• Have exit criteria. For a launch, your exit criteria might be hitting a certain rank or review count, after which you dial back. For branding, maybe a certain impression share and then you focus on retargeting those who showed interest

• Communicate goals if working with a team or agency. Sometimes agencies optimize for ACoS blindly. Make sure everyone understands, “We’re okay with ACoS up to X% on this campaign because the goal is Y”

A great mindset is: ACoS is a means to an end, not the end itself. The end goal is profitability and growth. 

If temporarily higher ACoS helps achieve greater profitability down the road (or prevents a larger loss, as in liquidation), it can be the right move. 

Just be intentional about it. As Amazon’s guidance suggests, decide what goal is most important (growth vs. efficiency) and set your ACoS targets to align with that.

In summary, you should accept a high ACoS only knowingly and strategically. Always remember: total profitability > lower ACoS is important. We chase low ACoS to increase profit, but if profit can come in other ways while ACoS is high, that might be fine. It’s all about balance.

How No Fluff Helps Brands Lower ACoS Without Killing Sales

Dealing with Amazon PPC and ACoS can be complex and time-consuming. Sometimes you’ve tried all the “fast fixes” and strategies, but you still need expert help to get that ACoS down and keep your sales growing. 

That’s where No Fluff comes in. We pride ourselves on a no-nonsense, data-driven approach to Amazon advertising (and digital marketing in general) – we focus on results without the fluff.

At No Fluff, we help brands lower ACoS without killing sales by taking a holistic and scientific approach to Amazon marketplace management. Here’s how we do it:

1. Full-Funnel Optimization

We don’t just look at your PPC in isolation. Our team examines your entire Amazon sales funnel – from your ad strategy to your product listings to your reviews. 

High ACoS often has underlying causes, and we address those at every level. We optimize your product listings (images, copy, pricing) to boost conversion rates, ensuring that every click has the best chance to turn into a sale. 

Simultaneously, we refine your PPC targeting, bids, and campaign structure using advanced techniques (many of the ones we covered in this article, and then some). 

This one-two punch of improving conversion and cutting ad waste is how we dramatically improve your ad efficiency.

2. Data-Driven Bid Management and A/B Testing

Our philosophy is to test, measure, and iterate. We A/B test the heck out of everything – from ad creatives to bidding strategies – to find what truly works for your product​. 

Using both our expert team and AI-driven tools, we adjust your bids dynamically to find the sweet spot that maximizes sales at a lower cost. 

We won’t just set an arbitrary target ACoS and hope; we continuously analyze search term reports, placement reports, and performance data, then fine-tune campaigns. 

No fluff here – just scientific, lab-tested approaches to squeeze more efficiency from your ad spend (we like to say we “A/B test the crap out of everything we do” to uncover conversion gold).

3. Strategic Balance 

One thing that sets No Fluff apart is our balanced approach. We understand you don’t want to kill your sales to get a low ACoS. 

Our team works with you to define the right ACoS targets for your goals. Want to aggressively launch a new product? 

We’ll help allocate budget and set expectations for higher launch ACoS, while crafting a strategy to taper it down as organic rank builds (maintaining that balance we discussed). 

Need to improve profitability on an existing line? We’ll zero in on quick wins to cut waste and boost conversion, bringing ACoS down fast, but also look for opportunities to increase volume efficiently (for example, exploiting new keywords or markets where ACoS is low). 

We constantly ask: Is this driving profitable growth? If yes, we scale it. If no (just driving spend), we cut it. It’s that simple guiding principle.

4. Transparent Reporting and No Fluff Promises

True to our name, we keep things transparent. You’ll know exactly what we’re doing, why we’re doing it, and what the results are. 

We demystify Amazon metrics for you – whether it’s ACoS, TACoS, ROAS, CVR, etc., you’ll get clear reports and insights, not jargon. 

If something’s not working, we won’t hide it in “fluff” metrics; we’ll confront it and fix it. Our clients appreciate that honesty and clarity. 

We treat your ad spend as if it were our own money – every dollar is accounted for and must pull its weight.

Conclusion

If you’re ready to stop losing money on high ACoS campaigns and start running a lean, profitable Amazon operation, consider partnering with No Fluff. 

We’ll handle the heavy lifting of PPC optimization and conversion rate enhancement so you can focus on your broader business strategy. 

The outcome: healthier margins, stronger rankings, and peace of mind that your Amazon ads are truly working for you.

Ready to lower your ACoS and scale your Amazon sales? Check out No Fluff.in to learn more about our approach and get in touch with our team.

Frequently Asked Questions

What is considered a high ACoS on Amazon?

A high ACoS on Amazon typically means your ad spend is eating into or exceeding your profit margins. While it varies by category and product, anything above 40–50% is usually seen as inefficient unless you have very high margins or a specific goal like launching a product.

How do I lower my ACoS on Amazon?

To lower your ACoS, focus on tightening keyword targeting, reducing bids on underperforming terms, adding negative keywords, and optimising your product listing to improve conversion rates. All these actions directly impact spend efficiency and help cut waste.

Can high ACoS ever be a good thing?

Yes, in some cases. A temporarily high ACoS may be strategic, such as during new product launches, brand awareness campaigns, or category rank pushes. The key is to track it closely and ensure it supports your long-term growth goals.

Does ACoS affect my organic ranking?

Indirectly, yes. A high ACoS usually reflects poor ad efficiency, which often comes from low conversion rates. Amazon’s algorithm favors listings with high relevance and conversions, so poor ad performance can hurt your organic search visibility over time.