LTV:CAC Ratio Calculator

Compare customer lifetime value to acquisition cost and see what the ratio means for your business — with benchmarks that vary by industry, stage and margin rather than one universal number.

Written and reviewed by the CalcBundle editorial team. Transparent formulas · results are estimates, not advice.

LTV : CAC ratio

Enter both LTV and CAC as values greater than zero.

What is the LTV:CAC ratio?

The LTV:CAC ratio compares how much a customer is worth over their lifetime (LTV) to how much it costs to acquire them (CAC). It is one of the clearest signals of whether a business — particularly a startup or SaaS company — has sustainable unit economics.

How to interpret the ratio

Below 1:1 — you lose money on every customer; economics are negative.
~1:1 to 2:1 — tight; little room to cover overheads and grow.
~3:1 — often considered healthy in many SaaS/business models.
5:1+ — strong economics, but can also mean you are underinvesting in growth.

These are illustrative guides. The “right” ratio depends on your gross margin, how fast you recover CAC (payback period), your growth stage and your industry.

Why benchmarks vary

A high-margin SaaS business with fast payback can thrive at a lower ratio than a low-margin business, because it keeps more of each dollar and recovers cash sooner. Growth- stage companies often deliberately run lower ratios to capture market share. Treat the “right” ratio as a reference point, not a target set in stone.

Example

With an LTV of $1,200 and a CAC of $300, the ratio is 4:1 — each customer returns four times their acquisition cost over their lifetime.

Related metrics

Calculate the inputs first with the LTV calculator and CAC calculator, then check how fast you recover cost with the CAC payback calculator. These feed into startup valuation.

Frequently asked questions

What does the LTV:CAC ratio mean?

It compares the lifetime value of a customer to the cost of acquiring them. A ratio of 4:1 means each customer is worth four times what you spent to acquire them. It's a quick read on whether your unit economics work.

How do you calculate LTV:CAC?

Divide customer lifetime value by customer acquisition cost: LTV:CAC = LTV ÷ CAC. For example, $1,200 LTV ÷ $300 CAC = 4:1.

Is 3:1 the right LTV:CAC ratio?

3:1 is often cited as healthy for many SaaS and subscription businesses, but it is not a universal law. The right ratio depends on your industry, growth stage, gross margin and payback period. A very high ratio can even signal you are underinvesting in growth.

Should I use revenue LTV or gross-profit LTV?

Gross-profit LTV is usually more meaningful because it reflects the money actually available after delivering your product. Enter a gross margin to see the gross-profit LTV:CAC alongside the revenue-based ratio.

CAC

Work out how much it costs to acquire one customer — blended, marketing and sales CAC.

LTV

Estimate a customer's lifetime value from order value, frequency and lifespan — or churn.

CAC Payback Period

See how long it takes to recover CAC from a customer's gross profit.

Startup Valuation

Estimate a startup's indicative value from ARR, revenue, growth and churn.

Disclaimer. This calculator provides estimates for informational purposes only. Results are based on the information you enter and the assumptions used by the calculator. Actual financial, tax, business valuation, lending, marketplace or investment outcomes may differ. Consider consulting a qualified professional for decisions involving significant amounts of money. Benchmarks shown are illustrative, not universal rules. Results are estimates based on the inputs you provide.