Amazon Advertising Glossary — Metric
What is TACoS on Amazon?
TACoS (Total Advertising Cost of Sale) is the percentage of your total Amazon revenue that you spend on advertising. Unlike ACoS, which only counts ad-attributed revenue, TACoS includes organic sales — making it the truest measure of how efficiently advertising is driving the whole business. The formula is TACoS = (Ad Spend ÷ Total Revenue) × 100. A TACoS of 8% means $0.08 of every dollar your store earns is reinvested in ads.
Formula
TACoS = (Ad Spend ÷ Total Revenue) × 100
Total Revenue = ad-attributed sales + organic sales. Most sellers pull this from Seller Central → Business Reports.
Example calculation
- Ad Spend: $5,000
- Ad-attributed Revenue: $20,000 (ACoS = 25%)
- Organic Revenue: $30,000
- Total Revenue: $50,000
- TACoS = ($5,000 ÷ $50,000) × 100 = 10%
You spend $0.10 on Amazon ads for every $1.00 of total Amazon revenue across both ad-attributed and organic sales.
What is a good TACoS on Amazon?
A healthy TACoS depends on category, brand maturity, and growth phase. Across the $29.6M in 2025 spend Headline managed for 43 brands across 8 marketplaces, here are the ranges we typically see:
Mature brand
5–10%
Established brands with strong organic ranking, high review velocity, and well-optimized listings. Ads sustain rank rather than buy growth.
Growth phase
10–15%
Brands actively scaling new ASINs, expanding to new marketplaces, or defending category share. Acceptable if revenue is growing faster than spend.
Launch / Aggressive
15–25%+
New product launches and competitive category entries. Sustainable only short term — should drop within 3–6 months as organic rank compounds.
A declining TACoS alongside flat or rising total revenue is the strongest signal that advertising is generating compounding organic lift — the ultimate goal of mature Amazon PPC.
TACoS vs ACoS vs ROAS
These three metrics measure related-but-distinct things. Track all three; do not optimize a single one in isolation.
| Metric | Formula | Tells you |
|---|---|---|
| ACoS | (Ad Spend ÷ Ad Revenue) × 100 | Campaign-level ad efficiency; standard Amazon-native metric. |
| ROAS | Ad Revenue ÷ Ad Spend | Inverse of ACoS; useful for cross-platform comparisons (Google, Meta). |
| TACoS | (Ad Spend ÷ Total Revenue) × 100 | Whole-business advertising efficiency including organic sales lift. |
How to lower TACoS over time
TACoS falls when organic sales grow faster than ad spend. Three levers compound:
1. Build organic rank
Use Sponsored Products to drive sales velocity on target keywords for 60–90 days, then organic rank carries the keyword and you can pull bids back. ACoS rises temporarily; TACoS falls structurally.
2. Improve listing conversion rate
Better images, A+ Content, and review depth improve organic conversion as much as paid. A 1-point CVR improvement reduces both ACoS and TACoS proportionally.
3. Defend rather than buy share
Once a category leader, shift budget from broad-match acquisition to brand-defense exact-match and competitor-targeted Sponsored Display. Lower spend, similar revenue, lower TACoS.
Frequently Asked Questions
What is the difference between TACoS and ACoS?
ACoS divides ad spend by ad-attributed revenue. TACoS divides ad spend by TOTAL revenue, including organic sales. ACoS measures campaign efficiency; TACoS measures business efficiency. A brand with stable ACoS but falling TACoS is winning organic share — the strongest signal that advertising is compounding.
What is a good TACoS for a new product launch?
During the first 60–90 days of a launch, TACoS of 20–30% is normal because there is little organic revenue yet. As reviews accumulate and organic rank improves, TACoS should fall to 10–15% by month 3 and 5–10% within 6–12 months for a healthy launch.
How do I calculate TACoS in Seller Central?
Pull total ordered product sales from Seller Central → Business Reports → By ASIN, sum ad spend across all campaigns from the Advertising Console for the same date range, then divide and multiply by 100. Headline clients receive this calculated automatically in their Looker Studio dashboards alongside ACoS, ROAS, and CVR.
Can TACoS be negative or zero?
TACoS cannot be negative — it is a ratio of two positive numbers. It approaches zero only when a brand has very high organic sales relative to ad spend, which is rare and usually unsustainable because competitors will eventually advertise on the same keywords.
Why is my TACoS rising even though my ACoS is flat?
A rising TACoS with stable ACoS means ad spend is growing faster than total revenue — usually because organic sales are stagnating. Common causes: new competitors entering the category, listing conversion dropping due to negative reviews, pricing creep, or stockouts that hurt rank.
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