TACOS
Definition
Total advertising cost of sale — ad spend divided by total revenue (ad-attributed and organic combined) — the measurement Amazon sellers shift to once AI-influenced sales grow outside ad attribution.
Defined in The Agentic Commerce Glossary.
How else it gets framed
The same term carries different emphasis depending on the surface it’s used on. Both readings are correct.
Total Advertising Cost of Sale — total ad spend divided by total sales (organic plus advertising), expressed as a percentage. It measures how much of your entire revenue is being paid for with ads, not just the revenue ads directly touched.
TACOS, Not ACoS: The Measurement Shift →Where TACOS comes up
The guides that put this term to work, rather than just defining it.
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