Break-Even ROAS CalculatorHow much can you spend on ads?
Whether 300% ROAS is good depends on your margin. Enter cost, fees and shipping to see the minimum ROAS that breaks even and the ROAS you need to keep your target margin.
Enter your own channel and payment fees. Defaults are reference values from public pages as of November 2026.
Connect orders, ad spend and product costs, and Laplace calculates contribution margin and real ROAS for every product every day, including bundle and gift costs.
How the break-even roas is calculated
- STEP 1
Break-even ROAS = revenue ÷ pre-ad contribution × 100
The point where all pre-ad contribution goes to ads. Below it, every sale loses money.
- STEP 2
Target ROAS = revenue ÷ (pre-ad contribution − target profit) × 100
Decide what share of revenue you want to keep after ads to get the ROAS you need.
- STEP 3
Max CPA = pre-ad contribution
The most you can pay to acquire one order.
Worked example
Result with the calculator's default inputs.
| Sale price | $39.00 |
|---|---|
| COGS | −$11.00 |
| Fees (Custom) | −$3.90 |
| Shipping | −$6.50 |
| Packaging & returns | −$1.42 |
| Ad spend (ROAS 300%) | −$13.00 |
| Contribution | $3.18 |
| Contribution margin | 8.2% |
| Break-even ROAS | 241% |
Related searches
- break-even ROAS calculator
- break even ROAS
- target ROAS calculator
- ROAS calculator
- max CPA calculator
- break-even CPA
FAQ
Can I compare this to the ROAS in Meta or Google Ads?
Carefully. Each platform credits itself for the same order, so platform ROAS is often higher than reality. Compare against ROAS deduplicated with your real order data.
My break-even ROAS is very high. What can I change?
It means cost of goods or fees are high relative to price. Try bundles to raise order value, a different shipping policy, or lower-fee channels and see how the number moves.
Do you store the numbers I enter?
No. Everything is calculated in your browser, and there is no sign-up or email gate. 'Copy result link' puts your inputs in the URL, so only people with that link see the same result.
Do I have to calculate every SKU by hand?
This calculator is for one product at a time. Laplace Analytics connects orders from your stores and marketplaces, ad spend and product costs, and calculates contribution margin for every SKU daily, including bundle and free-gift costs.