What is break-even ROAS?
Break-even ROAS is the revenue-to-ad-spend ratio where the contribution from an acquired order is fully used by advertising. It is a threshold, not a recommended target. If your actual ROAS falls below the threshold, the modeled order loses money after the variable costs entered above.
Break-even ROAS formula
First calculate how much of the order remains before advertising:
Maximum CPA = Contribution before ads
Break-even ROAS = Revenue ÷ Maximum CPA
Worked ecommerce example
Suppose an order sells for $49.95. Product cost is $10, shipping is $4.89 and payment/platform fees are 3%. Before advertising, about $33.56 remains. That makes the break-even CPA about $33.56 and the break-even ROAS about 1.49×. At exactly that acquisition cost, modeled profit is zero.
Why maximum CPA and break-even ROAS are connected
Maximum CPA expresses the acquisition ceiling as money per order. Break-even ROAS expresses the same unit economics as a revenue-to-ad-spend ratio. A store with more contribution available for advertising can tolerate a higher CPA and therefore has a lower break-even ROAS.
Which costs should you include?
Use costs that change with or can reasonably be allocated to an order: product cost, outbound shipping, fulfillment, payment processing, marketplace/platform fees, packaging, expected returns and other per-order charges. Fixed overhead and tax treatment may require a broader business-profit model.
Break-even is not your target
Operating exactly at break-even leaves no modeled profit from the order. Use the target-profit field to reserve a margin before calculating how much remains for acquisition. Real businesses may also need room for overhead, taxes, attribution uncertainty and unexpected costs.
Calculate your ecommerce profit margin →
Read: What is a good ROAS for ecommerce? →
A quick guide to putting break-even ROAS to work
- Check which ROAS your ad platform reports. Platforms count conversions in their own way, so compare like with like and allow for orders that get attributed twice or not at all.
- Set campaign targets above break-even. Use the ROAS from the target-profit field, not the break-even number.
- Recheck after price or fee changes. A discount, a new payment provider or a plan change shifts your break-even ROAS. The Black Friday calculator and Stripe vs PayPal calculator help you update the inputs.
- Think in margin, not markup. Break-even ROAS is 1 ÷ contribution margin, so a small margin change moves it a lot. See markup vs margin.
Break-even ROAS FAQ
Is a higher ROAS always better?
A higher ROAS means more attributed revenue per unit of ad spend, but ROAS alone does not show profit. Product cost, shipping, fees, refunds and other costs still matter.
Is maximum CPA the same as break-even CPA?
In this order-level model, yes. It is the contribution available before advertising—the most you can spend to acquire the order before modeled profit reaches zero.
Should I target my exact break-even ROAS?
Usually not. Break-even is the zero-profit threshold in the model. A practical target normally needs a buffer for desired profit and costs not included in the calculation.
Does currency change the formula?
No. Use the same currency for every monetary input. The underlying ratios are currency-independent.