What Is a Good ACoS on Amazon? ACoS vs TACoS Explained

Every Amazon seller asks the same question sooner or later. What is a good ACoS? The honest answer is that it depends on your margin, your goal for each product and how much of your business comes from ads. A 40% ACoS can be great for one brand and a slow leak for another.

This guide explains ACoS and TACoS in plain English, shows you how to work out your own target, and covers the mistakes we see most often when we audit new accounts.

What ACoS means

ACoS stands for Advertising Cost of Sales. It tells you how much you spent on ads for every dollar of sales those ads brought in.

ACoS = ad spend ÷ ad sales × 100

If you spent $300 on Sponsored Products last week and those ads drove $1,200 in sales, your ACoS is 25%. You paid 25 cents in ads for each dollar of ad-attributed revenue.

ROAS is the same number flipped around. ROAS = ad sales ÷ ad spend. A 25% ACoS is a 4.0 ROAS. Amazon shows both in the ads console, so use whichever one your team finds easier to read.

What TACoS means and why it matters more

TACoS stands for Total Advertising Cost of Sales. It compares your ad spend to all of your sales, not only the sales that came from ads.

TACoS = ad spend ÷ total sales × 100

Using the same example, if your total sales that week were $4,000 (ads plus organic), your TACoS is 7.5%.

ACoS tells you how efficient your ads are. TACoS tells you how dependent your business is on ads. That second number is the one that decides whether you have a healthy brand or an expensive habit.

Here is the pattern you want to see over time. Ad spend grows a little, organic sales grow faster, and TACoS slowly falls. That means your ads are helping you rank, and the rankings are bringing in sales you no longer pay for.

If TACoS keeps rising while total sales stay flat, your ads are only buying sales you would have made anyway, or they are propping up a listing that does not convert.

How to find your break-even ACoS

Before you can judge any ACoS, you need to know your break-even point. This is the ACoS where you make zero profit on an ad sale.

Break-even ACoS = profit per unit before ad costs ÷ selling price × 100

Say you sell a product for $40. After the product cost, shipping to Amazon, the referral fee and the FBA fee, you keep $14. Your break-even ACoS is 14 ÷ 40 = 35%.

• Below 35% ACoS, each ad sale makes money.
• At 35%, each ad sale breaks even.
• Above 35%, each ad sale loses money, though it may still be worth it for ranking or launch reasons.

Work this out for every product. Margins differ a lot across a catalog, so one account-wide target almost always leaves money on the table.

So what is a good ACoS on Amazon?

There is no single number, but these ranges are a useful starting point for most brands we work with.

• Launch phase: ACoS above break-even is normal for the first 6 to 10 weeks. You are paying for data, reviews and ranking.
• Growth phase: aim for an ACoS close to break-even on generic keywords and well below it on proven exact match terms.
• Profit phase: for mature products with strong organic rank, many brands target an ACoS that is 30% to 50% below break-even.
• Branded keywords: searches for your own brand name usually convert very well. ACoS here should be low, often under 10%.

For TACoS, many healthy private label brands sit somewhere between 5% and 15%. New brands and very competitive categories run higher for a while. What matters most is the direction of the trend, not one week’s number.

Set a target ACoS for each product, not each account

Here is a simple way to set targets that match your goals.

1. Calculate break-even ACoS for each ASIN.
2. Decide the job of each product. Is it a launch, a growth product or a cash cow?
3. Set a target. For example, launch products at break-even plus 10 points, growth products at break-even, and cash cows at half of break-even.
4. Bid toward that target. A quick rule is target bid = average order value × conversion rate × target ACoS.
5. Review every week and move products between phases as they mature.

That bid formula is worth a closer look. If a product sells for $40, converts at 12% and your target ACoS is 30%, your bid ceiling is 40 × 0.12 × 0.30 = $1.44. Any keyword where you are paying more per click than that will run above target unless conversion improves.

Why your ACoS is high (and what to fix first)

When we audit an account with a high ACoS, the cause is usually one of these five.

1. Wasted spend on search terms that never convert

Auto and broad campaigns find new keywords, but they also find junk. Search terms with 15 or 20 clicks and no orders quietly eat budget. Adding them as negatives is the fastest win in most accounts. Our free Ad Waste Finder sorts your search term report and flags these for you.

2. A listing that does not convert

Ads bring the shopper to the page. The page has to close the sale. Weak main images, vague bullets and few reviews push conversion down, and lower conversion means a higher ACoS at the same bid.

3. Bids set once and never touched

Bids that made sense at launch are often too high once rank improves. Adjust bids based on real conversion data at least every week or two.

4. Everything in one campaign

When branded, generic and competitor keywords all share a budget, the cheap and profitable traffic gets mixed with the expensive kind. You lose control over both.

5. Chasing the wrong goal

Sometimes a high ACoS is a choice. If you are defending page one on your main keyword, a higher ACoS may be the right call. Just make it a decision, not an accident.

Real numbers from accounts we manage

Lowering ACoS is rarely about one trick. It comes from cleaner structure, tighter negatives and better listings working together. A few examples from our case studies:

• For a baby products brand, Pondering Pine, ACoS fell 34% while revenue rose 42%.
• For a gourmet food brand, Livyor, Sponsored Products ACoS dropped 37% and daily orders grew 61%.
• For a fashion brand, Verdusa, ACoS fell 27% after we rebuilt images and copy, with conversion rate up 39%.

Notice that two of those three wins involved listing work, not only ad changes. ACoS is an ad metric, but it is driven by the whole product page.

The bottom line

A good ACoS is one that fits your margin and your goal for that product. Know your break-even, set targets per ASIN, watch TACoS for the bigger picture and cut wasted spend every week. If you want a second pair of eyes on your numbers, our PPC management team can review your account, or you can start with a free 20-point audit.

FAQs

What is a good ACoS for Amazon sellers?

A good ACoS is one below your break-even point, which is your profit margin before ad costs. For many private label products that lands between 15% and 35%, but launch products often run higher on purpose.

What is the difference between ACoS and TACoS?

ACoS compares ad spend to sales from ads only. TACoS compares ad spend to all sales, including organic. ACoS shows ad efficiency. TACoS shows how much your business depends on ads.

What is a healthy TACoS on Amazon?

Many established brands sit between 5% and 15%. The trend matters more than the number. A falling TACoS while sales grow means your ads are building organic rank.

How do I calculate break-even ACoS?

Divide your profit per unit before advertising by the selling price and multiply by 100. If you keep $14 on a $40 product, your break-even ACoS is 35%.

How can I lower my ACoS fast?

Add negative keywords for search terms with many clicks and no sales, lower bids on keywords above target, and move proven search terms into exact match campaigns. Then improve images and bullets to lift conversion.