TACoSTotal Advertising Cost of Sale
TACoS measures ad spend as a percentage of total revenue — organic plus paid. It shows the true cost of advertising relative to your whole business, not just ad-attributed sales.
What is TACoS?
Total Advertising Cost of Sale is calculated as: Total Ad Spend ÷ Total Revenue (organic + paid) × 100. It differs from ACoS in one critical way: ACoS only uses ad-attributed sales in the denominator, while TACoS uses all revenue. This makes TACoS a more honest measure of advertising's role in your overall business health.
The distinction matters most when you have significant organic sales. A product ranking #1 organically for a high-volume keyword might generate 80% of its sales from organic search and 20% from PPC. ACoS might look high (you're spending $500 in ads to generate $800 in ad-attributed sales = 62% ACoS). But TACoS looks completely different: $500 ad spend ÷ $5,000 total revenue = 10% TACoS — very healthy.
TACoS is the metric that answers: 'Is advertising actually building my business, or is it just paying for every sale?' A declining TACoS over time, with flat or growing ad spend, means organic sales are growing — a sign of a healthy, compounding business. A TACoS that never drops means you're buying every single sale through ads with no organic leverage accumulating.
Why it matters for sellers
Many sellers optimise ACoS in isolation and miss the bigger picture. A brand might slash ACoS from 35% to 18% by cutting bids — but if organic rank collapses and total revenue drops 40%, the business is worse off. TACoS captures this trade-off because it accounts for all revenue, not just the ad-attributed slice.
For Amazon sellers specifically, TACoS is the strongest signal of whether your PPC investment is building long-term organic value. A healthy TACoS trend (declining over 3–6 months after launch) demonstrates that your early PPC spend generated ranking signals that are now producing organic sales without ongoing ad spend — the ideal compound growth pattern.
How to use TACoS
TACoS is not displayed natively in Seller Central — you calculate it manually. Export your Business Reports data (total revenue by date range) and your advertising reports (total spend by date range) from Seller Central. Divide total ad spend by total revenue and multiply by 100.
Track TACoS monthly from launch. During launch, expect TACoS of 15–25% as most sales come from PPC. Target TACoS below 10% within 3–6 months as organic rank builds. Set a TACoS target in your launch plan and review it monthly alongside ACoS — both tell you something the other can't.
Real-world example
Month 1 of launch: $400 ad spend, $600 ad-attributed sales (ACoS 67%), $800 total sales (TACoS 50%). Month 6: $500 ad spend, $900 ad-attributed sales (ACoS 56%), $6,200 total sales (TACoS 8%). ACoS barely improved — but TACoS tells the real story: organic sales exploded from $200 to $5,300, meaning PPC launched a business that now runs largely on organic traffic. The investment in ACoS-inefficient early spending paid off dramatically in TACoS terms.
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Frequently asked questions about TACoS
What is the difference between ACoS and TACoS?
ACoS = Ad Spend ÷ Ad-Attributed Sales. TACoS = Ad Spend ÷ Total Revenue (organic + paid). TACoS is the more comprehensive metric. ACoS measures campaign efficiency. TACoS measures the true advertising burden on your entire revenue, and is a better measure of long-term business health.
What is a good TACoS on Amazon?
Under 10% is generally considered healthy for an established product (6+ months old with solid organic rank). 10–15% is acceptable. Above 20% on a mature product suggests heavy ad dependency and limited organic traction. During launch phase (first 1–3 months), 15–30% TACoS is normal and expected.
How do I calculate TACoS?
TACoS = (Total Ad Spend ÷ Total Revenue) × 100. Export your advertising spend from Seller Central's Reports > Advertising Reports, and your total revenue from Reports > Business Reports. Divide total spend by total revenue and multiply by 100. Use the same date range for both figures.
Can TACoS be too low?
Yes — a very low TACoS might indicate you're under-investing in advertising, sacrificing keyword rank and growth potential to look efficient on paper. The goal isn't the lowest possible TACoS; it's a declining TACoS trend that indicates organic leverage building, alongside sufficient ad investment to maintain rank and capture new customers.