Analytics
Break-Even CAC Calculator
A fast scenario tool for simple purchase and subscription funnel economics.
- • Keep margin separate from fees so the math stays interpretable.
- • Use subscription mode when paid periods or trial leakage matter.
- • Current CAC comparison is there to show pressure, not to forecast with precision.
Mode
How it works
Result / output
Break-even CAC
$3.19
Break-even CAC equals expected gross profit per acquisition.
At these assumptions, you can afford up to $3.19 CAC before gross-profit economics turn negative.
Expected net revenue / acquisition
$3.89
Expected gross profit / acquisition
$3.19
Expected paid periods
3
Math details
Interpretation notes
Signals
How to calculate break-even CAC for one-time purchases and subscriptions
A practical guide to break-even CAC: what goes into the number, how to avoid fake confidence, and how to compare current CAC to real unit economics.
How to read CPM, CTR, CPC, CPA and ROAS without losing the story
A practical guide to the core paid media metrics: what each one means, how they connect, and how to diagnose pressure before making random changes.
Are percentages entered as 0–100 or decimals?
Enter them as normal percentages such as 12 or 65. The tool converts them internally.
Can break-even CAC be zero?
Yes. If refunds wipe out revenue or gross margin is zero, allowable CAC can fall to zero.