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Break-Even ROAS Calculator

Calculate break-even ROAS from gross margin and other variable costs.

Last reviewed: 2026-10-20

Calculations run locally in your browser. Your figures are not sent to a server or stored by us.

Break-Even ROAS Calculator formula

Contribution Margin = Gross Margin − Other Variable Cost %
Break-Even ROAS = 1 ÷ Contribution Margin (decimal)

Worked example

At a 40% contribution margin, break-even ROAS is 2.5x.

How to use this calculator

  1. Enter the gross margin percentage for sales generated by advertising.
  2. Enter other variable costs that scale with revenue when they are not already included in gross margin.
  3. Select Calculate to find contribution margin and break-even ROAS.
  4. Treat the result as a modeled floor rather than automatically using it as your profit target.

Understanding the results

The lower the contribution margin available before advertising, the higher the ROAS required just to break even on the modeled variable economics.

Practical uses

Set a minimum media threshold

Use break-even ROAS to identify when advertising efficiency falls below modeled unit economics.

Test margin sensitivity

Change product margin or variable costs to see how quickly the break-even threshold moves.

Important notes

  • Use contribution margin after all variable order costs for a more realistic threshold.

Frequently asked questions

Why does lower margin require higher ROAS?

Because less of each revenue dollar remains available to pay for advertising.

Is break-even ROAS a target ROAS?

Not necessarily. A target usually adds desired profit or safety margin above break-even.

Should payment fees be included?

Include variable fees that materially reduce contribution and are not already reflected in gross margin.

Can break-even ROAS be below 1x?

Not when contribution margin is at or below 100%. In ordinary commerce, break-even ROAS is typically 1x or higher.

Learn the calculation

Use the guides below for the formula, worked examples and interpretation details.

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Disclaimer

Results are estimates for general information only and are not financial, accounting, tax, investment or legal advice. Verify important figures with a qualified professional.