Break-Even ROAS Calculator

How to use the Break-Even ROAS Calculator

Estimate the advertising revenue multiple needed to cover ad spend from the pre-ad contribution margin. Enter the percentage of revenue remaining after non-ad variable costs.

Formula

Break-even ROAS = 1 ÷ (contribution margin / 100).

Worked example

At a 40% contribution margin, break-even ROAS is 1 ÷ 0.40 = 2.5×, or 250%. $250 revenue contributes $100 to cover $100 advertising.

Interpretation and limitations

The accepted margin is greater than 0% and below 100%. This simplified threshold excludes fixed overhead unless your margin assumption already accounts for it.

Break-Even ROAS questions

Should I include ad spend in the margin?

No. Use a pre-ad margin, otherwise advertising is counted twice in this model.

Why does a lower margin require higher ROAS?

Less of each revenue dollar is available for advertising. At 20% margin, the threshold increases to 5×.

Continue your calculation

For the next step, use the Contribution Margin Calculator or the ROAS Calculator. Review each tool’s input definitions before carrying a result into another calculation.

Frequently asked questions

Is this calculator free?

Yes. It runs in your browser and does not require an account.

How should I use the result?

Use the result as a planning estimate and verify business-critical decisions against your source records.