# What Is ACOS on Amazon? Complete Guide to Amazon Advertising Metrics > Learn what ACOS is in Amazon ads, how to calculate it, the difference between ACOS vs ROAS vs TACoS, and what a good ACOS looks like for your category. Amazon Advertising • Metrics * * * # What Is ACOS on Amazon? Complete Guide to Amazon Advertising Metrics \============================================================== Published by [VEONIB](https://veonib.com) • Updated July 4, 2026 • 12 minute read **Quick answer:** ACOS stands for **Advertising Cost of Sale** — the percentage of ad spend divided by revenue generated. If you spend $20 on Amazon ads and earn $100 in sales, your ACOS is 20%. The lower your ACOS, the more efficient your advertising. A good ACOS typically ranges from 15-30%, depending on your product category and profit margins. To improve your ACOS, focus on keyword optimization, listing quality, and conversion rate — including adding product video. [VEONIB](https://veonib.com) helps you create professional product videos from any URL in under 60 seconds, boosting conversion rates and lowering your ACOS. This guide explains everything you need to know about ACOS, ROAS, TACoS, and how to use these metrics to grow your Amazon business. In this article [\[What is ACOS in Amazon ads?\]](#what-is-acos) [\[How to calculate ACOS\]](#calculate) [\[ACOS vs ROAS\]](#acos-vs-roas) [\[ACOS vs TACoS\]](#acos-vs-tacos) [\[ACOS to ROAS conversion table\]](#roas-conversion) [\[What a high ACOS means\]](#high-acos) [\[Downsides of a low ACOS\]](#low-acos) [\[What is a good ACOS by category\]](#good-acos) [\[How to improve your ACOS\]](#improve-acos) [\[FAQ\]](#faq) ## 1\. What Is ACOS in Amazon Ads? **ACOS** (Advertising Cost of Sale) is the most important metric in Amazon PPC advertising. It tells you exactly how much you are spending on ads for every dollar of revenue those ads generate. The formula is straightforward: ACOS = (Total Ad Spend ÷ Total Ad Revenue) × 100 For example: - You spend **$50** on Sponsored Products ads in a week. - Those ads generate **$250** in sales. - Your ACOS = ($50 ÷ $250) × 100 = **20%**. Amazon reports ACOS at the campaign, ad group, and keyword level in Seller Central. It is the primary metric sellers use to evaluate whether their advertising is profitable. **Simple way to think about it:** If ACOS is 20%, you are paying 20 cents in advertising for every dollar of sales. The remaining 80 cents must cover your product cost, Amazon fees, and profit. The lower your ACOS, the more room you have for profit. ## 2\. How to Calculate ACOS Step by Step Let's walk through two real-world scenarios to make the math clear. ### Scenario A: Profitable Campaign - Ad spend: $100 - Attributed sales: $500 - ACOS = ($100 ÷ $500) × 100 = **20%** - Your ad cost per sale: $20 per $100 in revenue ### Scenario B: Break-Even Campaign - Ad spend: $150 - Attributed sales: $300 - ACOS = ($150 ÷ $300) × 100 = **50%** - Half of your revenue goes to ad costs — only viable if profit margins exceed 50% Amazon calculates ACOS automatically in your campaign manager. But understanding the math helps you set bids and budgets more intelligently. For a more detailed look at managing ad costs, see [our guide to reducing ACOS](https://veonib.com/s/guides/how-to-reduce-acos-amazon-ads). ## 3\. ACOS vs ROAS: What's the Difference? **Is ACOS the same as ROAS?** No — they are mathematically inverse. **How is ACOS different from ROAS?** ACOS is expressed as a percentage (spend ÷ revenue × 100), while ROAS is expressed as a ratio (revenue ÷ spend). They measure the same relationship from opposite directions. ACOS and ROAS are two sides of the same coin. Metric Formula Expression Example ACOS Spend ÷ Revenue × 100 Percentage 20% ACOS ROAS Revenue ÷ Spend Ratio 5:1 ROAS **Key difference:** ACOS looks at cost as a percentage of revenue. ROAS looks at revenue as a multiple of cost. A 20% ACOS means you earn $5 for every $1 spent — that is a 5:1 ROAS. They are mathematically interchangeable: ROAS = 1 ÷ ACOS (as a decimal). Amazon sellers typically use ACOS. Agencies and advertisers outside Amazon often prefer ROAS. The best approach is to be comfortable with both since different tools and reports may use either metric. ## 4\. ACOS vs TACoS: When to Use Each **TACoS** (Total Advertising Cost of Sale) is a broader metric that measures total ad spend against _total_ revenue — including organic sales, not just attributed ad sales. Metric Formula What it tells you ACOS Ad Spend ÷ Ad Revenue How efficiently your specific ad campaigns perform TACoS Total Ad Spend ÷ Total Revenue How advertising affects your entire business profitability **Why TACoS matters:** Strong advertising campaigns often lift organic rankings over time. Your ACOS might stay at 25%, but as organic sales grow, your TACoS drops — meaning your ads are working harder for your total business. A rising TACoS over time signals that your ad spend is growing faster than your organic base, which is unsustainable. ## 5\. ACOS to ROAS Conversion Cheat Sheet Here is a quick reference for the most common ACOS values and their corresponding ROAS: ACOS ROAS Interpretation 10% 10:1 Excellent efficiency 15% 6.7:1 Strong performance 20% 5:1 Good — target for most categories 25% 4:1 Average — needs monitoring 30% 3.3:1 Acceptable for low-margin products 33% 3:1 Break-even zone for many sellers 40% 2.5:1 Likely unprofitable for most categories 50% 2:1 Warning — only viable with very high margins ## 6\. What Does a High ACOS Mean? A high ACOS means you are spending a large share of your revenue on advertising. There is no universal "high" threshold — it depends on your profit margin. But generally: - **ACOS 30-50%:** High. Your ads consume a significant portion of revenue. Likely losing money unless margins are very high. - **ACOS 50%+:** Critical. You are spending more than half your revenue on ads. Profitable only for extreme high-margin products. **Common causes of high ACOS:** - Broad match keywords capturing irrelevant traffic - Low conversion rate on your product listing (fix this with better images, A+ Content, and product video) - High bids driven by competitive categories - Poorly optimized product pages that fail to convert - Negative keywords not being used to filter waste One of the fastest ways to lower ACOS is to improve your conversion rate. Adding product video to your listing can lift conversions by 15-25%. [VEONIB](https://veonib.com) generates professional product videos from any URL in under 60 seconds — no editing required. ## 7\. What Are the Downsides of a Low ACOS? It may sound counterintuitive, but a very low ACOS is not always a good thing. Here is why: - **You may be under-investing in growth.** A 5-10% ACOS might indicate you are bidding too conservatively and missing valuable traffic that competitors are capturing. - **New products need higher ACOS to rank.** During a product launch, a higher ACOS (30-50%) is normal and necessary to build organic rankings and collect reviews. - **You may be missing the halo effect.** Advertising at a moderate ACOS lifts organic rankings and increases total revenue. A very low ACOS strategy may limit your total sales volume. The goal is not to minimize ACOS to zero. The goal is to balance ACOS with your profit margins and growth objectives. For established products, 15-25% ACOS is the sweet spot for most categories. ## 8\. What Is a Good ACOS by Category? ACOS benchmarks vary significantly by product category. Here are rough guidelines: Category Typical ACOS Range Profit Margin Electronics 10-20% Low (10-25%) Clothing & Apparel 20-35% Medium (30-50%) Home & Kitchen 15-25% Medium (25-40%) Beauty & Personal Care 25-40% High (40-60%) Toys & Games 15-30% Medium (25-45%) Pet Supplies 20-30% Medium (25-40%) Tools & Home Improvement 12-20% Low (15-30%) Grocery 15-25% Very Low (5-15%) For more detailed benchmarks, read [our Amazon advertising benchmarks guide](https://veonib.com/s/guides/amazon-advertising-benchmarks-acos-ctr-cvr). ## 9\. How to Improve Your ACOS Here are actionable strategies to lower your ACOS: - **Add negative keywords** — Filter out search terms that click but do not convert. Review your search term report weekly. - **Optimize your listing** — Improve your main image, bullet points, and A+ Content. A higher conversion rate directly lowers ACOS. - **Add product video** — Listings with video convert 15-25% better. [VEONIB](https://veonib.com) generates videos from any product URL in under 60 seconds. - **Adjust bids by placement** — Bid higher on Top of Search and lower on Product Pages and Rest of Search. - **Use exact match for proven keywords** — Once you identify high-converting search terms, switch to exact match to control spend. - **Daypart your campaigns** — Reduce bids during hours when your target audience converts less frequently. For a complete walkthrough of ACOS reduction strategies, see [How to Reduce ACOS on Amazon Ads](https://veonib.com/s/guides/how-to-reduce-acos-amazon-ads). ### Boost conversion rates and lower ACOS with VEONIB Product video is one of the fastest ways to improve your conversion rate and lower your ACOS. VEONIB turns any product URL into a cinematic ecommerce video in under 60 seconds — no editing skills needed. Choose from 6 styles and export ready for Amazon. [Generate your product video](https://veonib.com) ## 10\. Frequently Asked Questions **What is ACOS in Amazon ads?** ACOS (Advertising Cost of Sale) measures ad spend divided by attributed revenue. The formula is: (Total Ad Spend ÷ Total Ad Revenue) × 100. A 20% ACOS means you spend $0.20 for every $1.00 in sales. **What is the difference between ACOS and ROAS?** ACOS = (Spend ÷ Revenue) × 100 (a percentage). ROAS = Revenue ÷ Spend (a ratio). They are inversely related. A 20% ACOS equals a 5:1 ROAS. **Is a higher or lower ACOS better?** Generally, lower is better — it means more efficient advertising. But very low ACOS may mean you are under-investing. The right ACOS depends on your profit margins and whether you are in launch mode or maintenance mode. **What is the difference between ACOS and TACoS?** ACOS measures ad spend vs ad-attributed revenue only. TACoS measures total ad spend vs total revenue (including organic). TACoS gives a more complete picture of how ads affect your overall business. **What ROAS is 25% ACOS?** 25% ACOS equals a 4:1 ROAS. The formula is ROAS = 1 ÷ ACOS (as decimal), so 1 ÷ 0.25 = 4.0. **How can product video help lower ACOS?** Product video improves conversion rates by 15-25%, which directly lowers your ACOS since the same ad spend generates more sales. [VEONIB](https://veonib.com) generates professional product videos from any product URL in under 60 seconds. * * * This article references:  [\[VEONIB\]](https://veonib.com)  [\[Amazon PPC Guide\]](https://advertising.amazon.com/library/guides/ppc-101)  [\[VEONIB: Reduce ACOS Guide\]](https://veonib.com/s/guides/how-to-reduce-acos-amazon-ads)  [\[VEONIB: Advertising Benchmarks\]](https://veonib.com/s/guides/amazon-advertising-benchmarks-acos-ctr-cvr)  [\[Amazon Advertising Cost of Sale\]](https://sellercentral.amazon.com/help/hub/reference/G202050060)