TACoS vs ACoS: Why Your Amazon Agency Might Be Hiding the Full Picture

The Short Answer: What Each Metric Actually Measures

What ACoS tells you

ACoS is a useful metric on a campaign level, but it's a narrow one that only counts the sales that have happened from an ad click.

This metric completely ignores organic sales and doesn't provide information if your paid activity is building your business or it's eroding your long-term rank.

You can think of ACoS as a speedometer that only measures one lane of the highway, while the rest of the traffic goes uncounted. This is the same scenario that is happening on your account.

Agencies work in the following way: they cut the broad keywords, shift the budget toward branded terms, and tighten targeting. By doing this, they achieve bringing ACoS down to a number that looks great on paper, but none of these actions guarantee that your revenue will grow.

In fact, they can push it in the opposite direction while the report continues to look fine.

What TACoS tells you that ACoS can’t

TACoS shows you the exact relationship between your ad spend and your entire business, and not just the campaigns your agency controls. When TACoS is falling over time, it means your ads are doing what they should - building your organic rank, reducing ad dependency, and making your business more efficient as it grows.

When TACoS appears flat or climbs while ACoS looks healthy, it means your ads are holding the account together rather than growing it.

This is the distinction that separates a strategy that scales from one that stalls.

Why ACoS Alone Is a Misleading Metric

The branded keyword problem

Branded keywords convert because the shopper already knows your product and has decided to buy.

Here, the ads didn't generate the demand but simply intercepted a purchase that was already coming your way and added a cost to a sale that was happening regardless.

TACoS exposes this, because a branded spend that is not growing the organic rank or new customer acquisition will keep your ad cost high in relation to the revenue.

If the branded spend consumes more of your total revenue without building organic rank and TACoS doesn't move, it's a clear signal that is not possible to see in an ACoS report.

When organic growth stalls but ACoS still looks healthy

ACoS can look healthy for months, while the organic rank is slipping in the background.

What agencies typically do is they cut the broad keywords, tighten targeting, and reduce what looks like wasted spend. As a result of this, the campaigns start to look better on paper, but the report never shows if that was the reason why your organic position was holding.

What you actually want to see is ACoS holding steady, while TACoS slowly drops. When this happens, it means your organic sales are gaining more traction, so you are not depending on paid spend to keep things running.

How to Calculate TACoS and What a Good Number Looks Like

The formula

To calculate TACoS, you need to divide your total ad spend by your total revenue and multiply by 100.

This number is not surfaced automatically in Seller Central, so you need to pull two separate reports: the total ad spend from the Campaign Manager and total revenue from Business Reports (both covering the same time period).

Once you have these numbers, the calculation is straightforward. If you spent $8,000 on ads, and you earned $50,000 that month, it means your TACoS is 16%. This is a number that tells you more about your account health than any campaign-level metric your agency is likely reporting.

TACoS benchmarks: launch phase vs mature ASIN

TACoS benchmarks shift based on the lifecycle of your product. This means during the launch phase, it’s normal to have TACoS of 20% to 30% or higher because that is the time when your ads are carrying most of the revenue load while the organic rank is still being established.

As the organic visibility grows, TACoS should fall without a dramatic reduction in ad spend, which is because more of your revenue will be coming from searches that you are winning without having to pay for.

For a mature ASIN, healthy TACoS typically sits between 5% and 15%. If your product has been live for 12 months or more, and this number is not declining, it means that your ads are covering ground that organic rank should be holding and that your business is more dependent on paid spend than it should be at that stage.

What TACoS-First Management Looks Like in Practice

Onsen Secret: tripled profit after shifting from ACoS to TACoS

Onsen Secret is a premium Japanese skincare brand. When they came to us at Olifant Digital, they had scaling trouble, which was compressing their margins. Their account looked manageable on ACoS, but the actual profit was getting worse.

We shifted their reporting framework to TACoS, concentrated the spend on products that were proven converters, and optimized the listings before scaling PPC. Due to this change, their listings started to earn traffic instead of just receiving it, their organic rankings improved, and the ad dependency started to fall.

Once these results started to accumulate, TACoS dropped and organic revenue grew, which led to a tripled profit. Their monthly revenue increased by $95,934.

Doron Santo, CEO at Onsen Secret: “Systematic approach. I see them as business partners and not just an agency.”

Balanced Tiger: 171% revenue growth, ACoS cut 50% in 2 months

Balanced Tiger is a wellness snack brand. Before they started working with Olifant Digital, their previous agencies were chasing broad and highly competitive keywords that inflated their ACoS and drained budgets without any sustainable returns.

After we shifted to high-intent long-tail keywords and implemented the 1-1-1-1 method (one campaign, one ad group, one keyword, one ASIN per unit), we were able to see the complete performance visibility at the product level and made TACoS tracking clean and accurate.

ACoS dropped by 50%, and their monthly revenue grew 171% in the first two months.

Adriano Bordoli, CEO at Balanced Tiger: “Extremely effective. Excellent communication and project management on their side to implement widespread changes over a short period of time.”

Spade to Fork: profitable TACoS across the full catalog in 44 days

Spade to Fork is an organic gardening brand that came to us because their ACoS was climbing year over year with no product-level profitability tracking in place. This made it  impossible to tell which ASINs were contributing to the overall health of the account and which ones were quietly draining it.

After we introduced product-level campaigns aligned to TACoS targets and moved to daily optimization, within 44 days, Spade to Fork achieved profitable TACoS across their entire catalog, not just the top-performing ASINs. Their Amazon sales grew by 46% and ACoS dropped 19%.

Jeff Kathrein, CEO at Spade to Fork: “Olifant works extremely closely with our account, and I am impressed with their support and know-how. I feel that our brand is in safe hands.”

Five Signs Your Agency Is Optimizing for ACoS and Not Your Profit

There are five signs that show your agency is not optimizing correctly, and you don’t have to pull campaign data to spot these signs. All the answers show up in your reports and in how your account manager responds when you push back.

• What does your report actually show? If the report leads with ACoS and it stops there without providing TACoS, your agency reports what’s easy and not what is useful.
• Is ACoS improving, but the margin remains unchanged? If ACoS has been dropping for three or more months without your net margins moving, it means the campaigns are being optimized for something that does not reach your bottom line. This is a sign that your account is running inside a closed loop and it's not connected to actual profitability.

• Is the ad spend growing while the organic rank stays flat? Over time, PPC should be building organic momentum. If it’s not, it means the spend is maintaining position rather than earning new ground.
• How are wins defined in your report? If every positive update is an ACoS reduction, ask what they cut to get there, and whether the total revenue moved in the same direction.
• Can your agency show you a TACoS trend? If they can’t, they are managing campaign performance in isolation, which is completely different from managing your business, and it’s an important distinction to understand before the next budget conversation.

Final Thoughts

ACoS is not a bad metric, but it's a limited one, and it becomes a problem when it's the only one that is reported by your agency. It is at this point when your agency is being judged on campaign performance, while your business growth sits in a different conversation.

Brands that are growing profitably on Amazon are not the ones that run the leanest campaigns but those that know exactly where their money is going and what it is producing. This is exactly the clarity level that TACoS provides.

If your reports show healthy ACoS but you’re experiencing margins that are not moving, or your current agency can’t provide a TACoS trend for the past 90 days, a free marketing plan from Olifant Digital will surface exactly what your current reporting is leaving out.

Frequently Asked Questions

What is a good ACoS on Amazon?

A good ACoS on Amazon is one that sits below your product’s profit margin after Amazon fees and cost of goods sold. If you have a margin that after all costs is 30%, an ACoS that is below 30% means that your ads are profitable on a campaign level.

Keep in mind that this calculation only tells you whether individual campaigns are paying for themselves, and it’s not telling you whether your total business is growing.

This is why ACoS should be read along with TACoS, and not in isolation.

Can TACoS replace ACoS entirely?

No, TACoS can’t entirely replace ACoS, and that’s not the goal. ACoS is useful for evaluating individual campaign efficiency and for understanding which ad types and keywords are generating the ad attributed revenue.

TACoS on the other hand, gives you the business-level view that ACoS can’t provide on its own. The two metrics have different purposes - ACoS informs tactical decisions at the campaign level, whereas TACoS shows you whether those decisions are moving the business in the right direction overall.

Why does my agency only report ACoS?

Your agency only reports ACoS because it's the default metric in Seller Central and also the easiest number to pull and present. Reporting TACoS requires combining data from two separate sources, which represents additional work for agencies.

When TACoS is part of the report, it also becomes much harder to show a clean number, while the margins are quietly declining in the background.