Definition
Break-even CPM is the maximum cost per 1,000 impressions you can pay while still breaking even on variable economics at your CTR, CVR, and contribution margin.
How to use it
- Break-even CPM increases with CTR, CVR, AOV, and margin.
- Use a buffer; break-even is fragile under noise and attribution error.
Measured as
Measure Break-even CPM with a fixed attribution window, conversion event, and spend basis before comparing campaigns or creative tests.
Operator takeaway
- Break-even CPM increases with CTR, CVR, AOV, and margin.
- Use a buffer; break-even is fragile under noise and attribution error.
- Use Break-even CPM only inside a stable attribution rule, conversion definition, and time window so campaign comparisons stay honest.
- If performance changes, check whether the metric moved for a real business reason or because the measurement setup changed underneath you.
Next decision
- Quantify the impact with Break-even CPM Calculator if you need to turn the definition into an operating assumption.
- Read Break-even CPM: how to price impressions from CTR, CVR, and margin if the decision depends on interpretation, policy, or trade-offs beyond the raw formula.
Where to use this on MetricKit
Calculators
- Break-even CPM Calculator: Compute break-even and target CPM from CTR, CVR, AOV, and contribution margin assumptions.
- Break-even CTR Calculator: Compute the CTR required to break even (and hit a target) given CPM, CVR, AOV, and contribution margin.
- Break-even CVR Calculator: Compute the CVR required to break even (and hit a target) given CPM, CTR, AOV, and contribution margin.
Guides
- Break-even CPM: how to price impressions from CTR, CVR, and margin: A practical guide to break-even CPM: translate CTR, CVR, AOV, and contribution margin into a max CPM and a target CPM with buffer.
- Break-even CTR: required CTR at a given CPM (with buffer): A practical guide to break-even CTR: set creative CTR targets from CPM, CVR, AOV, and margin, then use them to diagnose pre-click performance.
- Break-even CVR: required conversion rate at a given CPM and CTR: A practical guide to break-even CVR: set landing page CVR targets from CPM, CTR, AOV, and margin, then prioritize post-click fixes.