Calculate your Total Advertising Cost of Sales (TACoS). Measure ad spend as a percentage of total revenue to evaluate overall advertising efficiency.
TACoS (Total Advertising Cost of Sales) measures your ad spend as a percentage of your TOTAL revenue — not just ad-attributed revenue. While ACoS only looks at the efficiency of ad-driven sales, TACoS gives you the big picture of how advertising impacts your entire business.
A declining TACoS with stable or growing ad spend means your organic sales are increasing, which is the ultimate goal of Amazon advertising. Ads boost your ranking, which drives organic sales, which lowers TACoS even if ACoS stays the same.
This calculator computes TACoS from your ad spend and total revenue, and compares it to ACoS to show the organic sales multiplier effect. Use it to evaluate whether your advertising is building long-term organic momentum. Whether you are a beginner or experienced professional, this free online tool provides instant, reliable results without manual computation. By automating the calculation, you save time and reduce the risk of costly errors in your planning and decision-making process.
TACoS is a better indicator of advertising health than ACoS alone. Falling TACoS means your ads are driving organic growth. Rising TACoS means you're becoming more ad-dependent. This calculator shows the relationship between ad spend, ad revenue, and total revenue to assess long-term advertising strategy. Having a precise figure at your fingertips empowers better planning and more confident decisions.
TACoS = (Ad Spend / Total Revenue) × 100 ACoS = (Ad Spend / Ad Revenue) × 100 Organic Revenue = Total Revenue − Ad Revenue Organic % = Organic Revenue / Total Revenue × 100 Ad Revenue % = Ad Revenue / Total Revenue × 100
Result: TACoS: 10% | ACoS: 25% | Organic: 60%
Ad spend: $1,000. Ad revenue: $4,000. Total revenue: $10,000. ACoS: $1,000 / $4,000 = 25%. TACoS: $1,000 / $10,000 = 10%. Organic revenue: $10,000 − $4,000 = $6,000 (60%). The 15-point gap between ACoS and TACoS shows strong organic sales. Ads drive 40% of revenue at 25% ACoS, while organic contributes 60% for free.
Use ACoS to evaluate individual campaign and keyword performance. Use TACoS to evaluate your overall advertising strategy and whether ads are building organic momentum. A product may have "bad" ACoS (35%) but excellent TACoS (8%) if the ads are driving organic ranking growth. Focus on TACoS for strategic decisions and ACoS for tactical optimization.
Rising TACoS + Rising ACoS: Your ads are becoming less efficient and you're not building organic momentum. Action: optimize campaigns or revisit product-market fit. Rising TACoS + Stable ACoS: You're spending more on ads without proportional total revenue growth. Action: verify organic ranking isn't declining. Stable TACoS + Declining ACoS: Good sign — ads are becoming more efficient. Declining TACoS + Stable ACoS: Best case — organic sales are growing, reducing your ad dependency.
The ideal Amazon growth pattern: PPC drives initial sales velocity → Sales velocity improves organic ranking → Higher ranking drives organic sales → TACoS declines as organic share grows → Reinvest savings into new product launches. This flywheel can take 3–6 months to develop but creates sustainable, profitable growth.
TACoS (Total Advertising Cost of Sales) = Ad Spend / Total Revenue × 100. It measures how much of your total revenue (including organic sales) you're spending on advertising. Unlike ACoS which only considers ad revenue, TACoS reflects the full picture of advertising's impact on your business.
For established products: 5‒15% TACoS is healthy. For new product launches: 20–40% is acceptable as you build organic momentum. Below 5% may mean you're under-advertising and missing growth opportunities. Above 25% for mature products suggests over-reliance on paid traffic.
ACoS only measures efficiency of ad-driven sales (Ad Spend / Ad Revenue). TACoS measures ad spend against ALL revenue including organic. TACoS is always lower than ACoS because total revenue is higher than ad revenue. The gap between them indicates organic sales strength.
TACoS captures the "halo effect" of advertising. Good PPC campaigns boost organic ranking, which drives organic sales not captured by ACoS. A product could have 30% ACoS (marginal) but 8% TACoS (excellent) because ads are fueling strong organic growth. TACoS tells the full story.
Declining TACoS with stable ad spend means your total revenue is growing faster than your ad spend. This usually means organic sales are increasing (often due to improved ranking from PPC-driven sales velocity). It's the ideal trajectory and indicates your ads are building lasting value.
Lower TACoS by: growing organic sales (better SEO, more reviews, higher conversion rate), maintaining efficient ad spend (optimize ACoS), using branded campaigns (cheap clicks that defend organic traffic), building external traffic sources (social media, email), and improving product page conversion. Over time, a successful strategy will shift the revenue mix toward organic, which naturally reduces TACoS even if ad spend stays flat or grows modestly.