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Amazon ACoS: Formula, Benchmarks & How to Lower It (2026)

ACOS for Amazon: What is ACOS and how Do I calculate It for Amazon PPC? [Updated 2023]

Amazon ACoS (Advertising Cost of Sale) is the percentage of your ad-attributed revenue that you spent on advertising. The formula is (Ad Spend ÷ Ad Revenue) × 100. Spend $25 on Sponsored Products and make $100 in ad sales, and your ACoS is 25% — you paid a quarter of that revenue to earn it.

That is the whole definition. The hard part isn't the arithmetic, it's the question every seller asks next: is my ACoS any good?

Here's the badger's honest answer, and it annoys people: there is no universally good or bad ACoS. A 60% ACoS on a product you're launching is a smart investment. A 20% ACoS on a product with an 18% margin is a slow bleed. ACoS only means something once you've put it next to your break-even point.

ACoS at a glance

What does ACoS stand for?Advertising Cost of Sale
What’s the formula?(Ad Spend ÷ Ad Revenue) × 100
What’s a good ACoS?Any figure below your break-even ACoS. For most sellers that lands between 15–30%.
What’s the average?34.42% across Ad Badger Sponsored Products accounts
Is lower always better?No. Low ACoS protects margin; high ACoS buys rank and visibility.
Where do I find it?Seller Central → Campaign Manager → the ACoS column

What Is ACOS?

ACoS (Advertising Cost of Sales) is an Amazon metric that measures
how much you spend on ads relative to the revenue those ads generate. It is expressed as a percentage: if you spent $20 and earned $100 in ad-attributed sales, your ACoS is 20%. Lower ACoS means higher ad efficiency.

What is the ACoS formula? ACoS, or Advertising Cost of Sales, measures how much you spend on advertising for every dollar of revenue you generate.

It is calculated as a ratio of ad spend to revenue, offering clear insight into your campaign performance. ACoS closely relates to your Target ACoS, guiding your approach to balancing profitability and growth in Amazon PPC.

Indeed, your Advertising Cost of Sales (ACoS) is critical in Amazon PPC. It’s one of the most significant metrics shaping your Amazon advertising strategy. The ACoS definition boils down to this: how much you spend on ads compared to how much you make—simple yet powerful.

If you’re wondering what is ACOS, it’s the percentage that reflects your ad spend efficiency. It ultimately becomes a measure of success, influencing how you bid on search terms. 

In the world of Amazon advertising, ACoS Amazon PPC strategy is everything. Mastering the ACoS formula is essential for calculating your return on investment and refining your bids to maximize efficiency.

So, what makes a good or bad ACoS on Amazon? The truth is, there’s no universal answer. ACoS calculation varies depending on your goals. Some sellers focus on achieving a break-even ACoS, while others aim to lower ACoS Amazon percentages to drive more profit. Understanding metrics like ROAS vs ACoS or incorporating TACOS advertising metrics can further refine your approach.

Ultimately, optimizing your Amazon ACoS is about aligning it with your business objectives. 

There's no such thing as a good or bad ACoS!

There, I said it. There’s no such thing as good or bad ACOS.

No such thing, like the John Mayer song. That’s just one badger’s opinion (even though it’s the right one). When someone asks, ‘what does ACOS stand for?’ the answer is simple. Sometimes we wonder if ACOS is a vanity metric. Sometimes saying that blows the minds of Amazon sellers like the ending of Fight Club.

When determining the profitability of your campaigns, the ACOS formula provides a clear metric to gauge how effectively your ad spend is converting into sales. Whether you’re aiming for a target ACOS Amazon advertisers recommend or experimenting with new strategies, understanding ACOS calculation is crucial.

If you’re curious about Amazon advertising, you might wonder, ‘What is an ACOS?’ or ‘How do I calculate break-even ACOS?’ We wrote a separate article about this—go check it out.

The true Amazon ACOS meaning lies in its ability to guide every PPC decision — from bid adjustments to budget allocation.

The answers lie in mastering the nuances of Amazon PPC strategy, including concepts like ROAS vs ACOS and TACOS metrics, which can further refine your approach.

For those aiming to optimize, learning how to lower ACOS Amazon should be a priority, especially when balancing goals between branded and non-branded campaigns. Remember, metrics like ACOS in Amazon PPC or TACOS advertising metrics are tools—not the whole story.

Ultimately, it’s about aligning your Amazon ACOS with your business goals, whether you’re managing a high ACOS campaign or striving for a balanced advertising-to-sales ratio, much like budgeting strategies used in Austin assisted living facilities. After all, good ACOS Amazon is relative—it depends entirely on your unique business needs.

In this article Ad Badger talks about ACOS:
    Add a header to begin generating the table of contents

    What does ACOS stand for?

    I’m still surprised how many people search for what ACOS stands for in Amazon — it’s such a basic thing.

    Many sellers ask the question: what does ACOS stand for in Amazon, and the answer is that it represents Advertising Cost of Sale, a key metric in Amazon PPC.

    As an ACOS marketing term, it’s one of the few KPIs that ties ad spend directly to sales outcomes.

    ACOS meaning Amazon refers to the percentage of sales that you are spending on advertising; for example, an ACOS of 20% means you’re spending $20 in ads for every $100 in sales generated from those ads.

    First, let’s explain the classic method for calculating Amazon ACOS, and then we’ll explain the newest formula (developed in 2023) after.

    In essence, the ACOS definition is simple. So, what does ACOS mean for your campaigns?

    ACOS, or Advertising Cost of Sales, is how much you spend on advertising per dollar of revenue you make.

    This metric is a cornerstone of any ACOS Amazon PPC strategy, helping sellers evaluate their ad performance.

    Knowing the ACOS definition helps you see if your ad dollars are really paying off or just burning a hole in your pocket. Whether you’re aiming for a good ACOS Amazon or exploring how to achieve a target ACOS Amazon, understanding this metric is crucial for success.

    You can also think of ACOS as the ratio of ad spend in contrast with the target sales. It’s a fundamental concept in Amazon PPC, offering insight into how your advertising budget translates into revenue.

    If you’re wondering how to calculate ACOS, the formula is simple:  ACOS = Total Ad Spend ÷ Total Sales.

    ACoS Formula
    How to easily calculate ACoS

    Here’s a good example of an ACOS calculation: If your ACOS is 25%, then that means you paid $0.25 for every dollar you made, or $25 for every $100 you made (we’re only considering Ad Spend here, not production costs, Amazon fees, etc.). 

    Undoubtedly, ACOS Amazon is a critical measurement of your campaign’s success.

    If you’re an experienced PPC marketer, you may realize Amazon took this idea from Google Ads which uses Return on Ad Spend (ROAS). Additionally, here are some more tips on Amazon PPC vs. Google Ads.

    Get the ACOS definition down, and you’ll have a clear picture of whether your ads are worth the spend or need a tweak.

    Check out this video made by Ad Badger’s CEO, Michael Facchin, to learn even more about the meaning of ACOS on Amazon:

    What is ACOS on Amazon

    Cool shirt right? I picked it out for him. It reminds me of my home in the Serengeti (actual footage of me in the Serengeti). 

    How Do You Calculate ACoS on Amazon?

    Honestly, without a clear ACOS formula, analyzing campaigns feels like guesswork.

    If your question is, “How do I calculate my Amazon ACOS?” To get your ACOS calculation right, the obvious answer is the formula: total ad spend / total sales.

    ACOS calculation is straightforward: simply divide your total ad spend by your sales generated from ads, and multiply the result by 100 to find the ACOS percentage, like when $200 in ad spend results in $1,000 in sales, giving you a 20% ACOS.

    But you might have more questions when calculating your Amazon ACOS.

    For instance, understanding how the conversion rate affects ACOS Amazon is critical. Additionally, to mathematically forecast future ACOS Amazon PPC, you’d need a new formula that provides a multidimensional view of your Advertising Cost of Sales. 

    If you’re thinking, where do I get that formula? Well, Elizabeth Greene from Junglr developed a new Amazon ACOS forecasting formula that can help you get a deeper understanding of your Amazon ACOS.

    Are you ready for the new formula? (Drum roll, please!)

    Here’s the formula:

    ACOS = (Avg CPC * (1/CVR)) / Average Order Value
    ACOS = (Avg CPC * (1/CVR)) / Average Order Value
     

    Let’s explore the newest formula for forecasting and calculating Amazon ACOS.

    Conversion rate plays a critical role in determining your Amazon ACOS, but until now, it’s been difficult to quantify exactly how changes in conversion rate affect it. With this new formula, you can finally measure the impact of even a slight change in conversion rate on your Amazon PPC metrics, including ACOS.

    For instance, if your conversion rate drops by two points, it’s now possible to see how that impacts your other metrics, Amazon ACOS included. Similarly, when your ACOS Amazon PPC fluctuates, this formula helps you diagnose the reasons behind the changes more effectively.

    This new formula makes it easier for you to identify why your Amazon ACOS is changing.

    You can break down your Amazon ACOS into individual components which are more actionable when you want to adjust it.

    ACoS formula reference

    MetricFormulaWhat it answers
    ACoS(Ad Spend ÷ Ad Revenue) × 100What share of my ad revenue went to ads?
    ACoS — diagnostic formCPC ÷ (CVR × AOV) × 100Which input — clicks, conversion, or order value — is driving my ACoS?
    Pre-Ad Profit Per SaleSale Price − Fees − COGSHow much can I spend on ads before I lose money?
    Break-even ACoS(Pre-Ad Profit ÷ Sale Price) × 100At what ACoS do I make exactly zero profit?
    Target ACoSBreak-even ACoS − desired marginWhat ACoS should I actually aim for?
    TACoS(Ad Spend ÷ Total Revenue) × 100How dependent is my whole business on ads?
    ROASAd Revenue ÷ Ad SpendThe same relationship, inverted — dollars back per dollar in
    Ideal max CPCAOV × CVR × Target ACoSWhat is the most I can pay per click and still hit my target?
    ACoS ↔ ROASACoS = (1 ÷ ROAS) × 100Converting between the two. 25% ACoS = 4x ROAS.

    Can Amazon PPC Influence Conversion Rate?

    The simple answer is yes, Amazon PPC can influence Conversion Rate.

    Amazon PPC and conversion rate share a symbiotic relationship, each influencing the other in significant ways. While Amazon PPC indirectly affects conversion rates, it doesn’t directly alter your product’s performance.

    You can structure your Amazon PPC keywords to optimize for higher conversion rates, but if the product isn’t a good fit for your audience, increased visibility from Amazon PPC ads alone won’t guarantee improved conversions.

    On the flip side, conversion rate plays a crucial role in shaping your Amazon PPC campaign performance.

    A higher conversion rate not only improves your ad efficiency but also has a direct impact on your Amazon ACOS. This connection is essential to understand, as a highly converting listing can significantly enhance your ACOS Amazon PPC strategy.

    Ad Badger App

    Amazon PPC Software. Made by Amazon PPC-ers. Made for Amazon PPC-ers.

    How Do I Calculate Amazon ACOS With This New Formula?

    Calculating ACOS accurately helps avoid overspending and allows for precision when optimizing campaigns.

    ACOS calculation might seem simple, but it tells you everything about how well your ads are actually working.

    If you don’t know how ACOS is calculated, you’re basically running ads blindfolded.

    Let’s say you have 30 days of performance data. Your average CPC is $1, your average conversion rate is 10%, and your average order value is $25. That gives you a 40% Amazon ACOS.

    Now, let’s imagine you aim to lower your Amazon ACOS to 35%. When you input your target Amazon ACOS in the Forecasting section of the formula, it will automatically calculate the conversion rate and CPC needed to achieve this target Amazon ACOS.

    In this case, to achieve a 35% Amazon ACOS, you would need to increase your average conversion rate to 11.43%. That’s a 13% increase. You’d also need a CPC of $0.88, which would be a 14.29% decrease from your current CPC.

    What ACoS looks like in practice

    Ad spendAd revenueACoSROASRead
    $200$4,0005%20xExtremely efficient — you’re almost certainly leaving volume on the table
    $30$15020%5xHealthy for most catalogues
    $200$1,00020%5xSame efficiency, more scale
    $250$50050%2xGrowth spend — only sensible if break-even sits above 50%
    $500$500100%1xRevenue in equals spend out. Losing money on every unit.

    When Should I Use This New Amazon ACOS Formula?

    When someone says their Amazon ACOS is “fine” but won’t give numbers, it’s usually not fine at all.

    The ACOS meaning isn’t just a definition — it’s a reality check for your whole PPC strategy.

    The new Amazon ACOS formula would be helpful if you’re running high Amazon ACOS and struggling to bring it down.

    Let’s say you’re running about 100% Amazon ACOS, you have a low average order value, and CPC is through the roof. You’re left with no traffic every time you bring your Amazon ACOS down because the bids are too low. In this scenario, you can plug the numbers you need to break even, and the formula would tell you the CPC you need to get there.

    If you are not running high ACOS on Amazon, stick with the original, tested and true formula.

    Now that you understand what is ACOS meaning, we need to cover how to optimize your advertising cost of sales to improve your profit margin.

    How To Use Amazon ACoS On Seller Central

    Something Michael touches upon with data is that segmentation is everything.

    To do this, first, you need to navigate to Seller Central and find the ACoS column.

    Where to find ACoS on Seller Central
    You can find ACOS on the right-hand column of the Seller Central dashboard

    When looking at your ACoS in Ad Badger or Seller Central, you can segment your data at the account, campaign, or ad group level.

    Here’s an in-depth article on how to segment the four auto-targets in Amazon Advertising and here’s an in-depth article on how to segment for branded keywords in Amazon Ads.

    Ad-Group-Sorting-ACOS
    You can see the specific ACOS of any of your ad groups

    With that, you’ll always be able to gauge your Amazon ACOS and see if you’re on track.

    But how do you tell if you have a good or bad ACOS? Well, that’s where target ACoS come into play.

    How Can You Lower Your ACOS

    In general, a lower ACOS is more desirable because it means you’re spending less to generate the same amount of revenue.

    Here are some tips to help you lower your ACOS:

    If all this sounds confusing, don’t worry. We wrote a whole post and recorded a video (the whole shebang) on break-even ACOS.

    How to Reduce Your ACoS on Amazon

    Every ACoS reduction comes from one of three places: cheaper clicks, better conversion, or higher order value. Every tactic below is one of those three wearing a costume.

    1. Cut wasted spend with negative keywords

    The fastest win available to most accounts. Pull your search term report and find every term with meaningful spend and zero conversions. Those are ads shown to people who were never going to buy. Add them as negatives.

    Our rule of thumb from years of account audits: roughly 35 negatives for every positive keyword. Most sellers have nowhere near that ratio, and most sellers are funding a lot of irrelevant clicks.

    2. Bid to the math, not to the mood

    Reduce bids on high-ACoS, low-conversion keywords. Raise bids on low-ACoS, high-conversion keywords — underbidding a profitable keyword is its own kind of waste. Use the ideal max CPC formula rather than nudging bids by 10% and hoping.

    Amazon's Dynamic Bids – Down Only setting is a reasonable guardrail while you bring an aggressive campaign under control. If you're making changes across a lot of keywords at once, bulk operations will save you hours.

    3. Fix the listing before you blame the ads

    Your product page and your price are half of every conversion. Great targeting sending traffic to a weak listing produces expensive clicks and no sales — which shows up as a high ACoS even though the campaign is working perfectly.

    Strong images that show the benefit, bullets that answer objections, A+ Content, competitive pricing. Every point of conversion rate improvement pushes ACoS down without touching a single bid.

    4. Segment by intent

    Don't run one campaign and average everything together. Split by intent so each group gets bids that match how it behaves:

    • Branded — people already looking for you. Cheapest clicks, highest conversion, lowest ACoS.
    • Competitor — expensive and lower-converting, but it buys share.
    • Generic — high volume, middling conversion. Needs the closest watching.
    • Long-tail — lower volume, higher intent, usually your best ACoS.

    Once they're separated you can run a low target ACoS on branded terms and an aggressive one on competitor terms, instead of one compromise number that suits neither.

    Break-Even ACoS: The Number That Makes ACoS Mean Something

    Break-even ACoS answers one question: at what ACoS do you make zero profit and zero loss?

    Everything above that line costs you money. Everything below it makes you money. Without it, an ACoS figure is just a number floating in space.

    Work it out in three steps:

    1. Start with your sale price. Say $20.
    2. Subtract Amazon fees and cost of goods. $3 in fees, $6 in COGS. You're left with $11. That's your Pre-Ad Profit Per Sale — what the sale is worth to you before a single advertising dollar.
    3. Divide that by the sale price. $11 ÷ $20 = 55% break-even ACoS.

    So on this product, 55% is the line. Run at 54% and you clear 20 cents. Run at 56% and you've created a 20-cent loss. Profit lives on one side, losses on the other, and the gap between them is a single percentage point.

    Which is exactly why a "low" ACoS can still be a losing ACoS. If your break-even is 22% and you're running at 25%, you're paying for the privilege of making sales, no matter how tidy 25% looks in a report.

    We've got the full walkthrough — with Michael's hand-drawn toy car and the complete profit-and-loss table — in the break-even ACoS guide. Calculate yours before you touch another bid.

    How Do I Hit My Target ACOS?

    No one wants to make zero profit, so we need another measure called Target ACOS (TACOS).

    Target ACOS is a strategic metric that balances ad spend and profitability, varying based on marketing goals.

    If your goal is to make a profit on Amazon, you would strategically choose not to spend all of your Pre-Ad Profit just to generate sales.

    What you spend is your Target ACOS and what you don’t is your profit margin. 

    In 2024, the average Target ACOS across different Amazon niches ranged from 10% to 30%, reflecting shifts in sellers’ ad strategies. Campaign performance analysis shows that lowering Target ACOS below 15% may reduce traffic, while setting it too high can decrease profitability.

    ACoS Breakdown
    How Break-even ACOS and TACOS are related
    andreea-1

    Did you know that the Ad Badger App can help you hit your target ACOS?

    Ad Badger’s team of marketers and engineers have created the best tool on the market for helping you reach your target ACOS. With a few clicks of a button, Ad Badger can: 

    • Help you hit your perfect ACOS
    • Automate your Amazon marketing

    How do I set my TACOS and how does it relate to bidding?

    Now, let’s examine the calculation that determines what the perfect bid actually entails. It involves taking your average order value, multiplying it by your conversion rate, and then dividing that by one over your Target ACOS. This result equals what you should ideally be paying for every single click.

    CPC Formula
    Calculating the perfect bid using TACOS

    If, hypothetically, you were able to go inside your Amazon account and optimize every single keyword or ad group according to this calculation, you would ensure that you are never overbidding and never underbidding.

    To automate this process, we made a bid ACOS calculator so you can bid the perfect amount every time and hit your Target ACOS and control your profit margin.

    How Do I Use The Ad Badger Bid ACOS Calculator?

    Any effective ACOS Amazon PPC strategy starts with understanding break-even points and adjusting bids to stay below them.

    Simply hit the file and make a copy to edit the ACOS calculator with your own data. 

    How to get the Ad Badger bid calculator from Google Drive
    How to make a copy of the Ad Badger bid calculator

    Now let’s run through another example.

    Let’s say our average order value is $19 at a 10% conversion rate, and your Target ACOS (TACOS) was 30%, so 0.3.

    Let’s plug each of these values into the calculator.

    Where to enter your numbers into the bid calculator
    You only need to fill out the orange cells for the magic to happen

    If we were to run through this calculation manually, we would get $19 times 0.10, over 1 over 0.3, giving us 57 cents. Meaning, if we were to bid 57 cents every single time, we would hit our 0.3 or our 30% Target Advertising Cost of Sale.

    Or the calculator does all the work for us!

    Bid Calculator Results
    Same result, but much much easier

    Ideally, you should have a TACOS for each Amazon PPC campaign you perform as well as an overall TACOS to stay within your ad budget.

    If you want to learn even more about how to use TACOS to optimize your Amazon PPC bids, check out the video below:

    If you want to hit your TACOS, you have to release your inner badger and fight for it. 

    Don’t forget your Amazon advertising can drastically increase your sales if you optimize your campaign properly. Keep reading to find out how.

    ACoS vs. TACoS vs. ROAS

    Three metrics, constantly muddled. The difference is just which revenue number sits in the denominator.

    Three metrics, one difference

    ACoSTACoSROAS
    FormulaSpend ÷ Ad Rev × 100Spend ÷ Total Rev × 100Ad Rev ÷ Spend
    Counts organic sales?NoYesNo
    Expressed asPercentagePercentageRatio
    Better whenLowerLower — falling TACoS means organic is growingHigher
    Best forCampaign and keyword decisionsWhole-business healthTalking to people who came from Google Ads

    ACoS and ROAS are the same relationship inverted: a 25% ACoS is a 4x ROAS. Amazon reports ACoS; Google Ads reports ROAS. Same idea, different dialect — and if you’re moving between platforms, we’ve written on Amazon PPC vs. Google Ads.

     What Does An Average, Low, Or High Amazon ACOS Mean?

    Anyone asking what’s ACOS is already on the right track — it’s the performance benchmark for Amazon advertising efficiency.

    Average ACOS is the Perfect Benchmark

    For Ad Badger, the average Sponsored Product Ad’s ACOS per user per day has been 34.42% since the beginning of 2019, even now through 2022.

    This is a good point of reference and right in the middle of a high and low ACoS.

    April is traditionally the best time to advertise for profitability for our users with the highest number of sales and the lowest ACOS (~20%).

    ACoS benchmarks by strategy

    ACoS rangeWhat it usually meansWhen it’s the right call
    Under 15%Very efficient — and often a sign of under-biddingDefending branded terms; mature bestsellers; very thin margins
    15–25%Low and comfortably profitable for most sellersSteady-state products with healthy margins
    26–34%Right around the platform average — ours runs at 34.42%Competitive categories; normal operating range
    35–50%Aggressive. Profit is thin or gone.Launches, rank-building, review velocity, seasonal pushes
    Over 50%Losing money on each ad sale unless margins are unusually fatDeliberate launch spend, clearing inventory — or a problem to fix today

    Low ACOS Means High Profitability

    Generally, sellers believe you should aim to lower your Amazon ACOS. However, it depends on what your strategy is for selling a product and your profit margin. I consider 15-25% a low ACOS and a good point to start at if you decide to aim for a low ACOS.

    However, you have probably been bombarded with the phrase “¡LOWER YOUR ACOS!”.

    It is true that lowering your Amazon ACoS can be helpful, but only if it matches your intentions.

    Setting a low ACoS is also a good strategy for:

    • Making as much profit as possible
    • Selling a low-converting product
    • You have a product that doesn’t need high visibility

    Example: Let’s say your TACOS is 10% and you make sales of $200. You spent $20 on ads for a profit of $180 (before the cost of goods).

    Lowering your ad spend can be negative as well. Having a low ad spend budget compromises the visibility of the product. Because you bid for keywords in Amazon PPC, setting your bids low for a highly competitive keyword runs the risk of losing the auction for it.

    High ACOS Means High Visibility

    The best way to explain high ACOS is to use the age-old saying, “You have to spend money to make money.”

    Great Amazon sellers use different TACOS for different types of products to maximize their selling potential. While having a low ACOS is great for profitability, a high ACOS can increase visibility, dominate a niche, and lead to more profit in the long run.

    Setting a high ACOS is a good strategy for sellers who:

    • Are trying to get rid of a low-selling product
    • Trying to run a sell-out of a product
    • Trying to increase brand awareness
    • Dominate a niche
    • Want high product visibility

    You can relate a high ACOS to advertisers who buy a huge spot in Times Square or produce a Super Bowl commercial. The advertiser is spending a large amount of money, but the chance of return is very high.

    Example: Let’s say your TACOS is 40% and you make sales of 1,000. You spent $400 for a profit of $600 (before cost of goods).

    If you haven’t checked it out yet, we wrote the ultimate guide to Amazon PPC that goes into more detail about how ACOS impacts your campaigns.

    And if you’re feeling overwhelmed or unsure about managing your PPC, don’t worry. Our coaching services are here to help you navigate and optimize your Amazon PPC campaigns.

    Custom tailored coaching for business owners, marketing teams, and agencies

    We teach you how each PPC theory directly applies to your business.

    Why Did My ACoS Suddenly Spike?

    The most common question we get. Work through it in this order:

    1. Check for a new search term. A single irrelevant term picking up volume can drag an entire campaign's ACoS up. Search term report first, always.
    2. Run time comparisons. Compare the spike window against the previous period and the same period last year. Is this a genuine change, a seasonal pattern, or a week with a holiday in it?
    3. Check conversion rate before you check spend. An ACoS spike with flat CPC and falling conversion is a listing problem — you lost the Buy Box, went out of stock on a variation, a competitor undercut you, or a bad review landed.
    4. Check CPC. A rising CPC with steady conversion means a competitor entered the auction. Decide whether the position is worth the new price.
    5. Give it seven days. Bid changes based on two days of data are noise, and over-optimising against noise is how accounts get wrecked.

    We went through the full diagnostic on this episode of The PPC Den. Also worth knowing: lowering your bids can actually increase your ACoS, which catches out a lot of sellers mid-panic.

    What Are Other Ways To Hit My Target ACOS on Amazon?

    Hitting your ACOS goals on Amazon is easy when you optimize your product pages, find the best times to advertise, and use an Amazon PPC tool like the Ad Badger App.

    Optimize Your Product Pages

    Your product page and your price are half the equation for creating a conversion. If you did a great job in your product ranking and Amazon PPC campaign, but your product page isn’t great, then the potential customer will bounce to another related product.

    Ensure your Amazon product listing appeals to the a-9 algorithm by answering if your product page clearly answers what the product is, who is it’s clear target audience, and how to purchase.

    How to optimize product pages on Amazon
    Here’s a great product page I found looking up “smoothie.” If you know any good smoothie recipes comment below. I’m tired of badger food.

    A great product page on Amazon has:

    Make sure to optimize your Organic Product Listings for SEO as well as PPC for supreme ACOS results.

    Find the Best Times to Advertise

    Using our data we’ve been collecting for the past since 2017, we found that Sunday to Wednesday are the best time to advertise and the best month is April.

    Using this data is incredibly valuable to Amazon sellers when deciding their TACOS. Here is the post on Amazon PPC Stats; we update it regularly.

    Average Sales per Day
    As you can see, the beginning of the year isn't the best time to advertise and Amazon sales have improved during spring time each year

    Use an Amazon PPC Tool

    Like I’ve been saying, there are many Amazon PPC tools out there that can automate your bidding to ensure you hit your TACOS every time (cough, cough like Ad Badger).

    We take your conversion rate and TACOS into account when bidding to hit your TACOS for every campaign and reach maximum sales and reduce wasted spend.

    We are big fans of TACOS, and excitingly, the Ad Badger App now provides this invaluable data. With this tool, you’ll always be informed about your Total ACOS per product and know exactly where to access this information. The strategy is to amplify the winners and optimize the laggers, thereby gaining an edge over the competition.

    Amazon Sales, ACOS, advertising cost of sales, sales ACOS, Amazon PPC, the ratio of ad–Save yourself from all of this lingo.

    Trust us when we say that an Amazon PPC tool like ours will make your life a lot more simple and save you an average of 10x the time of manual effort.

    Stay Tuned For More Amazon ACOS Content

    Using ACOS in marketing offers direct insight into how paid efforts translate into revenue, especially on marketplaces like Amazon.

    ACOS Amazon is a performance metric that helps sellers understand how much they are spending on ads relative to the sales generated; a high ACOS may indicate the need for campaign adjustments to increase efficiency.

    The bottom line: there’s no real definition of a “good” or “bad” ACOS because it relates to personal strategy and revenue. 

    Since this post first launched, our thoughts on Amazon ACOS have continued to evolve, and we talk about it often on The PPC Den Podcast

    We’re continually updating and publishing new information on Amazon Advertising Cost of Sale. So, stay tuned for more insightful updates on the metric that is pivotal in determining the success of your Amazon PPC ads.

    Knowing your ACoS is one thing – knowing exactly what levers to pull to lower it is another, and that’s exactly what we work through with you in our Amazon PPC coaching program.

    Badger out!

    Frequently Asked Questions About Amazon ACoS

    What does ACoS stand for on Amazon?
    ACoS stands for Advertising Cost of Sales. It is Amazon's primary metric for measuring ad efficiency, expressed as the percentage of ad-attributed revenue spent on advertising.
    Formula: (Ad Spend ÷ Ad Revenue) × 100.
    What is a good ACoS on Amazon?
    A good ACoS is one that falls below your profit margin. For most sellers, 15–25% is considered low and profitable. The Ad Badger platform benchmark across Sponsored Products users is 34.42% — treat this as an industry reference point.
    How do I calculate ACoS on Amazon?
    Divide your total ad spend by your total ad-attributed revenue, then multiply by 100.
    Example: $30 spend ÷ $150 revenue × 100 = 20% ACoS. This tells you that you spent $0.20 for every $1 earned from ads.
    What is the difference between ACoS and TACoS?
    ACoS measures ad spend against ad-attributed revenue only. TACoS (Total Advertising Cost of Sales) measures ad spend against total revenue — including organic sales. TACoS gives a more complete view of how ads support overall business performance.
    What is break-even ACoS?
    Break-even ACoS is the ACoS at which your advertising spend equals your profit margin — you make zero profit but zero loss on ad sales.
    Calculation: (Revenue − Cost of Goods − Amazon Fees) ÷ Revenue × 100.
    Why is my Amazon ACoS so high?
    High ACoS is most commonly caused by overbidding on broad keywords, a low product listing conversion rate, or insufficient negative keywords. Start by auditing your search term report and adding negatives for any term with spend but no conversions.
    Is a lower ACoS always better on Amazon?
    No. A low ACoS maximizes profit but limits visibility. A high ACoS sacrifices short-term profit to gain impressions, rank, and reviews. The right ACoS depends on your product's lifecycle stage and whether your primary goal is profitability or market share growth.
    How often should I check my ACoS on Amazon?
    Check ACoS weekly at the keyword level and daily at the campaign level during active optimization. Avoid making bid changes based on fewer than 7 days of data — short windows produce statistically unreliable ACoS figures that lead to over-optimization.

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