ACOS vs TACOS: How to Use Both and Set Targets (2026)

A campaign showing 40% ACOS on a product with a 35% margin looks like it’s losing money on every sale. Most sellers switch it off. Then their total sales drop by a third over the next month and they can’t work out why. That campaign was feeding the organic rank, and the organic rank was paying for everything. The ACOS vs TACOS question is really about this: one number grades a single ad, the other grades the whole business. You need both, read together, with targets you worked out from your own margin. This guide shows how to calculate each one, how to set targets, and how to read them side by side.

What ACOS and TACOS measure

ACOS stands for Advertising Cost of Sales. It’s the number Amazon puts in front of you in Campaign Manager, for every campaign, ad group, and keyword. It compares what you spent on ads with the sales Amazon credits to those ads.

ACOS = ad spend ÷ ad sales × 100

So if you spent $300 on a campaign and Amazon credits it with $1,000 in sales, your ACOS is 30%. In plain words, you gave up 30 cents of every ad-driven dollar to win that customer.

TACOS stands for Total Advertising Cost of Sales. It uses the same ad spend but divides it by all your sales, organic and paid together.

TACOS = ad spend ÷ total sales × 100

Same $300 of spend, but if the product sold $4,000 in total that month, your TACOS is 7.5%. Amazon doesn’t hand you this one as a headline number on the campaign screen. You build it yourself from two reports, which is part of why so many sellers never look at it.

Here’s how the two split the job:

• ACOS tells you if a specific campaign, keyword, or target is efficient on its own. It’s an ad metric.
• TACOS tells you how much of your whole revenue is going back into advertising. It’s a business metric.
• ACOS moves with bids, keyword choice, and how well your listing converts the clicks you buy.
• TACOS moves with all of that, plus how much organic sales you have underneath the ads.

There’s a third number worth knowing because it’s just ACOS flipped over. ROAS (Return on Ad Spend) is ad sales divided by ad spend. A 25% ACOS is a ROAS of 4, meaning $4 back for every $1 spent. Some tools show ROAS, some show ACOS. They describe the same thing, so don’t let a dashboard switching between them confuse you.

Why you need both numbers (and the breakeven myth)

ACOS on its own has one honest use: it tells you whether a single ad sale made money. To know that, you need your breakeven ACOS, and your breakeven ACOS is simply your profit margin before ad spend. That margin is what’s left of the selling price after product cost, shipping to Amazon, the referral fee, and the FBA fee.

If your margin before ads is 40%, any ad sale at an ACOS under 40% made money, and any ad sale above 40% lost money on that one order. Our Amazon FBA profit margins guide walks through working that margin out line by line, and it’s worth doing before you set a single bid. Without that number, “good ACOS” is a guess.

The myth is that this is the end of the story. It isn’t, because ad sales don’t happen in a box. When a keyword ad sells your product, Amazon sees a sale for that search term, and sales are one of the strongest signals for organic rank. Over a few weeks the listing climbs on that keyword, and now it sells organically too, at zero ad cost. Our course material calls this the halo effect. The campaign’s own report never shows those organic sales, because they weren’t attributed to a click.

Take the scenario our course uses. A product has a 35% margin before ads. One campaign is running at 40% ACOS. On ACOS alone, it’s losing money, so the reflex is to cut it. Before cutting, check TACOS. If TACOS for that product is 8% or 9%, the business is healthy overall: total ad spend is a small slice of total revenue, and that “expensive” campaign is probably the one holding the main keyword rank that drives the organic sales. Turn it off and you may save the ad spend and lose much more in organic orders.

The opposite mistake happens too. A seller sees a lovely 15% ACOS and assumes everything’s fine, while TACOS is creeping up month after month because organic sales are sliding and ads are covering the gap. ACOS looks great. The bank account doesn’t.

So the working rule we use with every account:

1. Use ACOS to manage campaigns: which keywords to raise, lower, pause, or add as negatives.
2. Use TACOS to judge the business: is the product actually profitable once you count every ad dollar.
3. Never cut a top keyword campaign on ACOS alone without checking what TACOS and organic rank did in the same period.

How to calculate ACOS and TACOS, step by step

You don’t need a paid tool for this. Seller Central has everything, split across two places. The only rule that matters is that both numbers cover the exact same dates, otherwise the result is meaningless.

1. Pick your date range. Use a full 30 days, or a calendar month. Don’t use the last 2 or 3 days (more on why in the mistakes section).
2. Get ad spend. In Campaign Manager, set that date range and note the Spend figure. You can do this for the whole account or filter to the campaigns for one product.
3. Get ad sales. On the same screen, note the Sales figure. Divide spend by sales and you have ACOS. Amazon calculates this one for you anyway, so this step is mostly a check.
4. Get total sales. Go to Reports, then Business Reports. Set the same date range and read the Ordered Product Sales column. For a single product, use the report that breaks sales out by child item (ASIN) instead of the account total.
5. Divide ad spend by total sales. That’s TACOS.
6. Write both down in one sheet, every week or every two weeks. One reading tells you very little. The trend tells you nearly everything.

Here’s the worked example from our course. Ad spend for the month was $2,070. Total sales for that variation in Business Reports were $8,033.49. $2,070 ÷ $8,033.49 = 0.257, so TACOS is 25.7%.

Now pair it with margin. That product had a 45% margin before ads. Subtract TACOS from margin and you get what you keep after every ad dollar:

45% − 25.7% = 19.3% left after advertising.

That subtraction is the most useful thing in this whole post. Margin before ads minus TACOS is your margin after ads. It’s still before returns, storage, and your own overheads, so it isn’t take-home profit, but it’s a far better picture than ACOS gives you.

Here’s what a simple weekly sheet looks like over a month. These numbers are made up to show the pattern, not taken from a client account:

ACOS barely moved. If you only watched ACOS, you’d think nothing was happening and maybe cut the budget. But total sales climbed every week while spend stayed flat, so TACOS dropped from 23% to 13%. That’s organic sales arriving on top of the ads, and it’s exactly the sign you want in the first two months of a product.

One more shortcut, because it explains how the two numbers connect. If you know your ACOS and what share of your sales comes from ads, you can get TACOS without the second report:

TACOS = ACOS × (ad sales ÷ total sales)

A 30% ACOS where ads bring in 40% of total sales gives a TACOS of 12%. Same ACOS, but if ads bring in 80% of sales, TACOS is 24%. That gap is the difference between a listing with real organic demand and one that only sells when you pay for it.

How to set your ACOS and TACOS targets

There’s no universal “good ACOS.” Anyone who quotes you one number without asking your margin is guessing. Targets come from your own product economics, and they change with the stage the product is in.

Start with an example product, using round numbers so the math is easy to follow. These are illustration figures, not a quote for your product, because FBA fees depend on size and weight:

• Selling price: $30.00
• Landed product cost: $9.00 (our vegetable chopper launch landed at about $9 a unit on a 500-unit order)
• Referral fee at 15%: $4.50
• FBA fulfillment fee: say $5.50 for this example
• Left before ads: $11.00, which is about 37% of the price

So breakeven ACOS is about 37%. Every ad sale under that made some money. Every ad sale above it lost some.

Now set targets by stage. This is the order we work through on accounts we manage:

1. Launch (roughly the first 60 days). ACOS will often sit above breakeven, and that’s expected. You’re buying the sales history that earns organic rank. On a launch we budget around $50 a day, about $3,000 over 60 days, because below that the listing doesn’t get enough impressions for Amazon to take it seriously. The target here isn’t a low ACOS. It’s a TACOS that falls week over week as organic sales start to show up.
2. Growth. Once organic rank holds on your main keywords, bring ACOS on proven keywords down toward or below breakeven. Many accounts sit here at an ACOS somewhere between half of breakeven and breakeven, while ads still push new keywords.
3. Mature. The product ranks, reviews are solid, and you’re defending position. Now ACOS targets sit well under breakeven on most campaigns, and TACOS settles into a band you’re comfortable with.

For TACOS, work backwards from the margin you want to keep. If the margin before ads is 37% and you want at least 20% left after ads, TACOS has to stay at or under 17%. That’s your ceiling. If TACOS goes above it for more than a month outside a launch or a deliberate push, something needs fixing.

What do real numbers look like? From our own launch data, a few reference points:

• A home and kitchen launch with tight niche selection hit about 15% ACOS in month one. That’s strong. Many beginner launches start at 50% to 80% ACOS and grind down slowly.
• A sports and fitness client launched at a 20% price premium over the category, with the bundle visible in the main image, and ran about 25% ACOS and 13% TACOS in month one.
• A rough rule the team uses: when ACOS lands around 20% and TACOS around 10% to 15%, a product is profitable on paper, as long as the return rate is normal for the category.

One more layer: not every keyword should carry the same ACOS target. A single account-wide target treats your most important search term the same as a five-word phrase that sells twice a month, and they aren’t doing the same job.

• Main keywords (the two or three searches that drive most of the category’s sales): allow a higher ACOS, up to breakeven or a little over during launch. These hold your organic rank, and organic rank is where the cheap sales come from.
• Long-tail keywords (longer, more specific phrases): aim well under breakeven. They’re usually cheaper per click and convert well, so they should be your most efficient campaigns.
• Competitor product targets: judge them on their own. Some convert better than keywords because the buyer is already on a weaker listing. Others burn money. Give each target 2 to 3 weeks of data before deciding.
• Your own brand name: expect a very low ACOS, and don’t let it flatter the account average. Many of those buyers were already looking for you.

The point of splitting targets this way is that when the account ACOS moves, you can see which bucket moved it. “ACOS went up” isn’t something you can act on. “ACOS on the main keyword went up after a new competitor arrived” is.

That last condition about return rates is doing a lot of work, and the next section is where it bites.

The mistakes that make ACOS and TACOS lie to you

Both numbers are simple. The trouble is in what goes into them and how often people look. These are the mistakes we see most on accounts that come to us confused about their own ad data.

Judging the last few days. Amazon credits a sale to an ad if the purchase happens within an attribution window after the click: 7 days for Sponsored Products and 14 days for Sponsored Brands and Sponsored Display, for sellers. So yesterday’s ACOS is missing sales that haven’t happened yet, and it will look worse than it really is. Business Reports, on the other hand, counts orders on the day they’re placed. Compare a 3-day window and both numbers are skewed. Use 14 to 30 days, and leave the most recent few days out when you make bid decisions.

Comparing ACOS across ad types in one view. Because Sponsored Brands and Display get a 14-day window and Sponsored Products gets 7, the Brands and Display numbers get an extra week of credit. Treat each ad type’s ACOS on its own scale.

Mixing products in one TACOS. Account-level TACOS blends your best seller with your weakest. A healthy 9% account TACOS can hide one product running at 35%. Calculate it per product, at least for your top few ASINs.

Forgetting returns. This one cost a client real money. On a vegetable chopper launch, ACOS sat around 20% and TACOS between 10% and 15%. On the ad dashboard, it looked like a winner. But the top sellers in that niche were rated under 4.5 stars, which is a sign the whole category gets returned a lot, and our listing didn’t escape it. Each return meant a lost unit, fees, and pressure on the star rating. The ad numbers stayed fine while the margin went away. If your category returns 10% to 15% of units, your real margin before ads is lower than the spreadsheet says, so your breakeven ACOS is lower too. Our Amazon FBA returns audit guide shows how to see your actual return cost.

Chasing a low ACOS by cutting bids everywhere. You can always get ACOS down by bidding only on your brand name and a few long-tail terms. Your ACOS will look beautiful and your total sales will shrink. That’s why TACOS and total sales need to sit next to ACOS in the same sheet.

Thinking bids are the only lever. ACOS is downstream of click-through rate and conversion rate, not just the bid. The sports and fitness launch above ran a premium price and still held 25% ACOS because the main image made the better offer obvious, so more of the people who clicked actually bought. Sellers who try to win on price alone usually run 40% to 60% ACOS in month one, because every listing looks the same and conversion is roughly equal across them. If ACOS is stuck high, look at the listing before you touch the bids.

ACOS vs TACOS side by side

The two numbers answer different questions, so putting them next to each other is the fastest way to remember which to use when.

The real skill is reading the two together, over time. Watch which way each one is heading across four to eight weeks, alongside total sales:

1. ACOS steady or rising, TACOS falling, total sales rising. Good. Ads are building organic rank. This is what a healthy launch looks like. Don’t panic about the ACOS.
2. ACOS falling, TACOS falling. Also good. You’re getting more efficient and organic is carrying more of the load. This is the growth stage working.
3. ACOS falling, TACOS rising, total sales flat. Watch this one. You may be bidding on your own brand terms and buying sales you’d have got anyway, or organic rank is slipping and ads are covering it.
4. ACOS rising, TACOS rising, total sales flat or falling. Act now. Check for a new competitor, a lost Buy Box, a review dip, or a price change before raising any budget.

We manage Amazon stores doing about $200K a month for paying clients, and the weekly check on every account is the same short sheet: ad spend, ad sales, total sales, ACOS, TACOS, and margin after ads, per product. It takes ten minutes. It catches most problems a month earlier than looking at ACOS alone.

If you want the full budget picture around these numbers, the pillar guide on Amazon PPC strategy by ad spend shows how the targets shift as monthly spend grows from the first few hundred dollars up to $10,000.

Learning to manage ACOS and TACOS yourself

None of this needs an agency or an expensive software subscription. It needs your margin worked out properly, two reports pulled on the same date range, and the habit of checking them every week or two. Most sellers who struggle with ads aren’t missing a tool. They’re managing everything off ACOS and switching off the campaigns that were quietly working.

If you’d like a structured walkthrough, our $27 Amazon course has lessons on the five core PPC metrics, ACOS and TACOS with the full calculation workflow, and how to set up and tune automatic and manual campaigns. It’s built for sellers who want to run their own ad account and understand why each number moves, rather than hand it to someone else and hope.

Frequently Asked Questions

What is the difference between ACOS vs TACOS?

ACOS divides ad spend by the sales Amazon credits to your ads, so it grades individual campaigns. TACOS divides the same ad spend by all your sales, organic and paid, so it grades the product or account as a whole. Use ACOS for bid decisions and TACOS for profitability.

What is a good ACOS on Amazon?

A good ACOS is any ACOS below your breakeven, and your breakeven is your profit margin before ad spend. If your margin before ads is 35%, an ACOS under 35% makes money on each ad sale. During a launch it’s normal to run above breakeven for a while to build rank.

What is a good TACOS?

Work it out backwards from your margin. Margin before ads minus TACOS is the margin left after advertising, so pick the margin you want to keep and that sets your TACOS ceiling. From our own launch data, around 10% to 15% TACOS has been profitable on paper for products with normal return rates.

How do I calculate TACOS on Amazon?

Take your ad spend from Campaign Manager for a date range, then take Ordered Product Sales from Business Reports for exactly the same dates. Divide ad spend by total sales and multiply by 100. For one product, use the child-item report so you’re not mixing in other ASINs.

Why is my ACOS high but my sales are growing?

That’s often the halo effect. Ads on a main keyword drive sales, those sales lift organic rank, and organic orders don’t show up in the campaign’s ad sales. If TACOS is flat or falling while total sales grow, the high-ACOS campaign is probably doing its job.

Should I turn off campaigns with high ACOS?

Not straight away. First check the product’s TACOS and organic rank for that keyword over the same 30 days. If the campaign is on a main keyword and TACOS is healthy, lower the bid in small steps and watch total sales, rather than switching it off and losing the rank it was holding.

The Bottom Line

ACOS and TACOS aren’t rivals. ACOS is the tool for managing campaigns, and TACOS is the check on whether the whole product is making money. Read one without the other and you’ll either kill the campaign holding up your organic rank or miss a product quietly sliding into a loss.

Work out your margin before ads first, because that gives you breakeven ACOS. Subtract TACOS from that margin to see what’s left after advertising. Pull both numbers on the same dates, every week or two, and watch the trend rather than a single day. Then set targets by stage: higher ACOS is fine at launch as long as TACOS is falling, and tighter targets make sense once the product ranks.

And keep returns in the math. A clean ACOS on a product that keeps getting sent back is still a losing product.