Free marketing calculator · Advertising break-even
Break-Even ROAS Calculator
Estimate the return on ad spend required for campaign contribution to cover advertising spend at your chosen contribution margin.
ROAS can look healthy while still being commercially unsustainable. Break-even ROAS adds the margin context that the standard revenue-to-ad-spend ratio leaves out.
What is break-even ROAS?
Break-even ROAS is the revenue-to-ad-spend ratio at which the contribution generated by attributable revenue equals the advertising spend included in the model. At that point, the campaign has covered ad spend but has not necessarily covered fixed costs or produced a wider business profit.
Example: at a 40% contribution margin, break-even ROAS is 2.5x because £1 of ad spend needs £2.50 of revenue to generate £1 of contribution.
Why margin changes the answer
If only 20% of revenue remains as contribution, every £1 of advertising spend needs £5 of revenue to recover that spend. At a 50% contribution margin, the same £1 of advertising spend needs £2 of revenue.
This is why a universal ROAS target is rarely sensible. Different products, markets and discount levels can produce different contribution margins even inside the same business.
Break-even ROAS is not the same as target ROAS
Break-even is a threshold, not necessarily the performance target. A business may need to exceed it to cover fixed costs, fund growth, absorb returns or discounts, or reach a required profit level. Conversely, a company may temporarily accept performance below a narrow first-order break-even if there is robust evidence of profitable repeat behaviour — but that requires a broader customer-economics model.
Use the right margin
For a commercial break-even calculation, contribution margin is generally more informative than gross margin if material variable costs such as fulfilment, payment fees or variable service costs sit below gross profit. Use a margin definition that matches the costs you are trying to recover and keep it consistent.
Compare actual ROAS with break-even
The Campaign Performance Calculator can calculate actual ROAS and estimated break-even ROAS together, with contribution and target comparisons in the same view.
Break-even ROAS calculator FAQs
Does break-even ROAS include fixed costs?
No. This focused calculator estimates the ROAS required for contribution to recover advertising spend at the stated contribution margin. Use the Break-even Revenue or Marketing Profitability calculators when you need fixed costs in the model.
Is a 1x ROAS break-even?
Only if contribution margin were effectively 100% and no other relevant costs existed. In most real businesses, 1x ROAS does not generate enough contribution to recover the advertising spend.
Should I use gross margin or contribution margin?
Use the margin that reflects the variable costs relevant to the decision. Contribution margin is usually more informative when costs such as fulfilment or payment fees vary with sales.