ROAS Reality Check Calculator

Adjust reported ROAS for returns, contribution margin, variable costs and incrementality to estimate the advertising result that actually reaches profit.

Transparent browser-side model · Inputs stay on this device

INPUT→MODEL→CONSTRAINT→DECISION

Ad spend ($)Platform-attributed revenue ($)Returns / refunds (%)Estimated incremental share (%)Contribution margin before ads (%)Other variable cost (% of revenue)Allocated fixed overhead ($)Target profit ($)

Enter your assumptions, then compare the options.

USE THE RESULT AS A DECISION BOUNDARY

Try a conservative set of assumptions before acting. If a small change flips the recommendation, compare both outcomes rather than treating the result as certain.