LTV vs CAC Breakeven Calculator
Determine whether customer acquisition cost is sustainable compared with lifetime value.
LTV vs CAC details
This calculator auto-updates when values change.
Check whether customer lifetime value supports your acquisition cost.
LTV:CAC ratio
4.00x
A ratio of 4.00x and payback of about 3.8 months gives a quick view of acquisition sustainability.
CAC
£180
LTV
£720
Payback period
3.8 months
Unit economics
Strong
About This LTV vs CAC Breakeven Calculator
LTV vs CAC Breakeven Calculator is designed for practical business planning, not abstract spreadsheet modelling. It turns a common commercial decision into a clearer number so you can compare options before committing time, money, or client expectations.
A business can grow revenue while losing money if customer acquisition costs are too high compared with customer lifetime value.
The result is an estimate based on the inputs you provide. Real outcomes depend on taxes, contracts, payment timing, market demand, client behaviour, and operating costs.
Practical Example
If CAC is GBP 180 and LTV is GBP 720, the ratio is 4x. That looks strong, but payback period and cash flow still matter.
The useful part is not only the headline result. The supporting breakdown shows which assumption drives the outcome and where a small change would make the biggest difference.
How to Use This Strategically
Use the result to decide whether to scale acquisition, improve retention, raise prices, reduce CAC, or slow growth until unit economics improve.
Run a conservative scenario and an optimistic scenario. If the decision only works under perfect assumptions, it probably needs a stronger margin of safety.
Common Mistakes to Avoid
Avoid using best-case inputs for billable time, conversion, churn, client stability, or costs. Business calculators are most useful when they reveal risk early rather than confirming a plan you already wanted to believe.
If the result affects pricing, hiring, contracts, product direction, or cash reserves, compare it with real accounting data and professional advice before making a major decision.
How to Use This Calculator
- 1
Enter realistic inputs
Use current numbers where possible, and avoid best-case assumptions unless you are deliberately testing upside.
- 2
Review the headline result
Start with the main result, then compare the supporting metrics underneath it.
- 3
Test a second scenario
Change the weakest assumption to see whether the decision still works.
- 4
Use the output for planning
Treat the result as a planning signal, not as a guaranteed business outcome.
Frequently Asked Questions
What does the LTV vs CAC Breakeven Calculator do?v
Determine whether customer acquisition cost is sustainable compared with lifetime value.
Are the results exact?v
No. They are estimates based on the numbers you enter and should be checked against real business records.
Can I use this for client or investor decisions?v
Yes as a planning aid, but important decisions should be supported by accounting, legal, tax, or commercial advice where relevant.
Why should I test multiple scenarios?v
Business plans are sensitive to assumptions. A low, expected, and high scenario gives a more useful range than one perfect-looking result.