Amazon TACOS Explained: Why It Matters More Than ACOS

TACOS shows how ad spend relates to total Amazon revenue, not just ad-attributed sales. Here is why it matters more than ACOS.

Article summary

TACOS shows how ad spend relates to total Amazon revenue, not just ad-attributed sales. Here is why it matters more than ACOS.

The TACOS formula

Short answer: TACOS, or Total Advertising Cost of Sales, is total ad spend divided by total Amazon revenue. Not just ad-attributed revenue. It matters more than ACOS because it shows whether your ads are building a sustainable business or just buying temporary sales.

What TACOS ranges look like

A healthy TACOS that decreases over time while revenue grows means your ads are fueling organic momentum. A flat or rising TACOS means you are paying for every sale and not building anything lasting.

What most people get wrong

- ACOS = ad spend divided by ad-attributed revenue - TACOS = ad spend divided by total Amazon revenue

What I would do next

A home goods brand I worked with was running at 32% ACOS. By ACOS standards, that looked borderline high. Their marketing lead was worried. But their TACOS was 14% because PPC was driving enough sales velocity to push hero SKUs to page 1 organically, which generated significant organic revenue that never appeared in the ACOS calculation.

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If they had optimized purely to lower ACOS, the logical move would have been cutting the higher-ACOS discovery and category campaigns. That would have dropped ACOS to 22% and looked better in the report. It also would have killed the organic ranking momentum that was producing 60% of total revenue.