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Etsy Ads ACOS Calculator

ACOS — Advertising Cost of Sales — is the single number that tells you whether Etsy Ads are making money. It's the share of ad-driven revenue you spent to get that revenue. The catch: revenue isn't profit. An ad campaign that doubled your sales can still lose money if your ACOS is higher than your true post-fee profit margin. This calculator applies the exact formula from our break-even ACOS guide so you can see where your campaign actually sits.

Total Etsy Ads spend for the period.

Revenue from orders Etsy attributes to ads.

True post-fee margin per order (after materials, Etsy fees, shipping).

ACOS

20%

Ad spend ÷ ad revenue

Break-even ACOS

30%

Equal to your profit margin

Gross profit from ads

$300.00

Ad revenue × margin

Net profit after ads

$100.00

Max profitable spend $300.00

Campaign status: Profitable — room to scale
How the math works

Break-even ACOS = your true post-fee profit margin. If you keep 30% per order, an ACOS of 30% means ads exactly break even. Below it, ads contribute real profit. Above it, every ad-driven sale loses money — even when ad revenue looks healthy.

  • Ad spend: $200.00
  • Ad revenue: $1,000.00
  • Profit margin: 30%
  • Gross profit: $300.00
  • Net profit after ads: $100.00

All calculations are estimates based on average platform fees. Real profits may vary depending on category, ads, and shipping.

How to use this calculator

  1. Enter your numbers in each field above — the calculator updates instantly as you type, so there's nothing to submit.
  2. Use your real figures when you have them, or sensible estimates while you're planning. If a field doesn't apply, leave it at zero.
  3. Compare the results, then change one input at a time to see how each lever (price, cost, fees, volume) moves the outcome.

Formula

ACOS = (Ad spend ÷ Ad-driven revenue) × 100 · Break-even ACOS = Profit margin after fees (%) · Gross profit from ads = Ad revenue × Margin % · Net profit after ads = Gross profit − Ad spend · Max profitable ad spend = Ad revenue × Margin %

Worked example

A campaign generates $1,000 in ad-driven revenue. True post-fee margin is 30%. Ad spend is $200.

  1. ACOS = (200 ÷ 1000) × 100 = 20%
  2. Break-even ACOS = profit margin = 30%
  3. Gross profit from ads = 1000 × 30% = $300
  4. Net profit after ads = $300 − $200 = +$100
  5. At $400 ad spend, ACOS would be 40% → $300 − $400 = −$100 (revenue-positive, profit-negative)

Answer: 20% ACOS · break-even at 30% · +$100 net profit

More worked examples

Campaign A — guide's profitable scenario. Ad-driven revenue $1,000, true post-fee margin 30%, ad spend $200.

  1. ACOS = (200 ÷ 1,000) × 100 = 20%
  2. Break-even ACOS = profit margin = 30%
  3. Gross profit from ads = 1,000 × 30% = $300
  4. Net profit after ads = 300 − 200 = +$100
  5. 20% ACOS sits well under the 30% break-even ceiling — scale carefully and re-measure as spend grows.

Answer: 20% ACOS · +$100 net · profitable

Campaign B — same product, higher spend. Ad-driven revenue $1,000, margin 30%, ad spend $400.

  1. ACOS = (400 ÷ 1,000) × 100 = 40%
  2. Break-even ACOS = 30%
  3. Gross profit from ads = 1,000 × 30% = $300
  4. Net profit after ads = 300 − 400 = −$100
  5. Same revenue as Campaign A, but ACOS is above the margin — every ad-driven sale is paying to lose money.

Answer: 40% ACOS · −$100 net · unprofitable

Thin-margin shop. Ad-driven revenue $500, true post-fee margin 12%, ad spend $80.

  1. ACOS = (80 ÷ 500) × 100 = 16%
  2. Break-even ACOS = 12%
  3. Gross profit from ads = 500 × 12% = $60
  4. Net profit after ads = 60 − 80 = −$20
  5. Margins under ~15% leave almost no ACOS headroom — fix pricing and listing conversion before scaling ads.

Answer: 16% ACOS · −$20 net · margin too thin

How it works

Break-even ACOS equals your true profit margin after Etsy fees, materials, and shipping. Spend below that line and ads contribute real profit; spend above it and every ad-driven sale loses money — no matter how big the revenue number looks in Etsy's ad dashboard.

Use the margin you actually keep on a real order, not gross revenue. If you keep 30% per sale, an ACOS of 15–20% leaves a healthy return. 30% is break-even. Anything north of that is buying customers at a loss, which only makes sense when repeat purchases or reviews justify it.

How to interpret your results

  • Dollar values are shown per sale, per order, or per item unless a result is explicitly labelled monthly, weekly, or daily.
  • Percentages (margin, ROI, conversion rate) are easier to compare across products and price points than raw dollars — use them when you benchmark.
  • A positive result means you're ahead after the costs and fees you entered. A negative result means the current numbers don't work — change a lever (raise price, cut a cost, lower ad spend) and recalculate.
  • Treat the output as a planning estimate, not a guarantee. Fees, taxes, and conversion rates shift over time — re-run the numbers whenever a key input changes.

Common mistakes

  • Using gross profit margin (before Etsy fees) — the only margin that matters here is what you actually keep after every fee.
  • Treating break-even ACOS as a target instead of a ceiling — you want to stay meaningfully below it.
  • Scaling spend without re-measuring ACOS — it almost always rises as budget grows.
  • Ignoring offsite ads — Etsy's 12–15% offsite fee on referred orders effectively lowers your margin, which lowers your break-even ACOS.
  • Comparing campaigns by revenue instead of net profit after ads.

Related Guides

Go deeper with plain-English guides on the same topic.

FAQ

What is a good ACOS on Etsy?
Anything meaningfully below your true post-fee profit margin. If you keep 30% per order, an ACOS of 15–20% is healthy; 30% is break-even; above 30% you're losing money on ad-driven sales.
Why does break-even ACOS equal my profit margin?
Your margin is the share of revenue you keep after costs and fees. If you keep 30%, you can spend up to 30% of that revenue on ads before the campaign zeroes out. Spend more and the math goes negative.
Does this work for Offsite Ads?
Offsite Ads charge a 12–15% fee on referred orders rather than per click, so they don't show an ACOS in Etsy. Apply this formula by treating the offsite fee as ad spend on those orders — and lower your margin input accordingly because the fee shrinks per-order profit.
Can I lose money even with positive ROAS?
Yes. ROAS (return on ad spend) measures revenue, not profit. A 5× ROAS at 30% margin still loses money once ACOS climbs above your margin — exactly the case the guide's worked example shows.
How is this different from the break-even CPC calculator?
Break-even CPC sets a ceiling on per-click cost using profit per sale × conversion rate. ACOS works at the campaign level using total spend ÷ total ad revenue. Use CPC to set bids; use ACOS to judge whether a campaign is paying for itself overall.

Why trust this calculator?

This tool uses standard mathematical formulas and commonly accepted calculation methods, shown openly in the Formula section above so you can verify the math yourself. Results are estimates based on the information you enter and do not account for every individual circumstance. For important financial, tax, legal, medical, or business decisions, please double-check with a qualified professional before acting on the numbers.

Keep going

One calculator rarely tells the full story. Pair this one with a related tool below to pressure-test your numbers from a different angle, or browse Work & Money Calculators for more in the same category.

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