What Is TACoS on Amazon?
TACoS — Total Advertising Cost of Sales — is the single most important metric for Amazon sellers who care about profit. Unlike ACoS, which only compares ad spend to ad-attributed revenue, TACoS compares ad spend to your total revenue. It tells you how dependent your business is on advertising.
The TACoS formula
TACoS = (Total Ad Spend ÷ Total Revenue) × 100Example: You spent $8,000 on Amazon ads last month and generated $100,000 in total sales (organic + ad). Your TACoS is 8%.
TACoS vs ACoS — the key difference
ACoS only looks at revenue directly attributed to your ads. A campaign can have a healthy 20% ACoS while contributing almost nothing to overall growth. TACoS reveals the truth: is advertising accelerating your organic sales, or propping them up?
Healthy TACoS benchmarks
- New launches (0–3 months): 20–40% is normal — you're buying rank and reviews.
- Growth phase (3–12 months): 10–20% as organic rank kicks in.
- Mature products: 5–10% is the sweet spot for most categories.
- Highly branded catalogs: 3–7% is achievable once brand search dominates.
Why a falling TACoS matters more than a falling ACoS
A dropping TACoS means your organic sales are growing faster than your ad spend — the flywheel is spinning. A dropping ACoS with a rising TACoS often just means you're over-bidding on branded terms and starving top-of-funnel growth.
Four levers to lower TACoS profitably
- Prune wasted spend. Negative-match search terms with high spend and zero conversions weekly.
- Push organic rank. Concentrate ad spend on 5–10 high-intent keywords until you hit page 1.
- Fix your listing. A 2% CVR bump on organic traffic beats any bid adjustment.
- Add defensive brand campaigns. Cheap branded clicks lock in already-warm buyers.
Common TACoS mistakes
Chasing a single-digit TACoS at all costs kills growth. If your break-even ACoS allows for a higher TACoS during a ranking push, take it — the compounding organic sales will drop TACoS on their own once rank holds.
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