CAC Payback Period Calculator
Reviewed by Hamza Gujjar, Algorithm Architect & Software Developer
Last updated: July 27, 2026How long before a new customer becomes profitable
CAC payback period answers a cash-flow-focused question distinct from lifetime value: not how much a customer is worth eventually, but how many months of revenue it takes just to break even on the cost of acquiring them in the first place.
Worked example
For a $600 acquisition cost and $50 in monthly revenue per customer:
Payback Period = 600 / 50 = 12.0 months (Within a commonly cited healthy range)
Subscription and SaaS businesses commonly target a CAC payback period under 12 months - a shorter payback period means less cash tied up in acquisition costs before a customer starts contributing net-positive cash flow, which matters enormously for how fast a business can reinvest in further growth.