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What can you afford
to pay for a sale?

Advertising only works when the margin behind each sale can carry it. Enter your price and per-unit costs to get your break-even ACoS and ROAS, then add your campaign numbers to see whether it is actually making money.

✓ Free, no sign-up✓ Every input editable✓ Nothing leaves your browser

Your product & campaign

Per-unit product numbers on the left, campaign totals on the right.

RUNS IN YOUR BROWSER

Everything except advertising.

Used for the max cost per click.

Your ad economics

Estimates from the numbers you enter, not provider statements or accounting advice. Confirm treatment with your bookkeeper.

KNOW YOUR LIMIT.

Spend what the
margin can carry.

Read more in The Tidy Ledger
or try the other free tools.

The two formulas

  • ACoS = ad spend ÷ ad-attributed sales.
  • ROAS = ad-attributed sales ÷ ad spend. It is simply 1 ÷ ACoS.
  • Break-even ACoS = your profit per unit before ads ÷ your selling price.

Reading the result

If your ACoS is below break-even, each ad-driven sale still earns a profit. If it is above, you are paying more for the sale than the sale earns. Many sellers deliberately run above break-even for a launch, to build rank and reviews. That is a choice to make with open eyes, with a defined end date.

COMMON QUESTIONS.

Quick answers.

Reconciling payouts after they land is our day job. Come see ↗

What is a good ACoS?+

There is no universal number. A good ACoS is one below your break-even ACoS, and below your target ACoS if you want a defined profit margin after advertising.

What is the difference between ACoS and ROAS?+

They are the same relationship inverted. ACoS is spend divided by sales; ROAS is sales divided by spend. A 25% ACoS is a 4× ROAS.

Why does the calculator ignore organic sales?+

Attribution differs between platforms and campaigns. This tool measures the direct economics of ad-attributed sales so you have a conservative break-even.

Where do I get my ad numbers?+

From your marketplace’s advertising reports for the same date range. Use totals for one campaign or one product at a time for useful results.

ADS SHOULD NOT HIDE YOUR REAL MARGIN.

See profit after fees,
refunds and ads.

TidyPayouts splits every payout into sales, fees and refunds, then matches it to your bank.

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