ConversionMath

LTV:CAC Ratio Calculator

Calculate your LTV:CAC ratio — the single best indicator of whether your growth model is financially healthy — and get an instant read on where you stand.

Your LTV:CAC Ratio

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Formula LTV:CAC = LTV ÷ CAC

How to use this calculator

Enter your customer lifetime value (LTV) and customer acquisition cost (CAC). The calculator returns the ratio and tells you whether it falls in the healthy range. To plan against a target ratio, choose LTV or CAC under "Calculate": for example, enter your LTV and a 3:1 target to see the most you can spend to acquire a customer. If you haven't calculated LTV or CAC yet, use the linked calculators below the inputs to work them out first.

What is LTV:CAC Ratio?

The LTV:CAC ratio divides your customer lifetime value by your customer acquisition cost. It's the single most important metric for evaluating the health of a customer-funded growth model. A ratio below 1:1 means you're losing money on every customer; at 1:1 you're breaking even on acquisition but earning nothing; at 3:1 you're in the range most investors and operators consider healthy. A ratio of 5:1 or higher is exceptional — but can also signal that you're underinvesting in growth and leaving market share on the table. The ratio's usefulness depends entirely on how accurately you've calculated both LTV and CAC.

When to use this calculator

  • Evaluating the unit economics of your business
  • Board and investor reporting
  • Deciding whether to scale paid acquisition, hold steady, or pull back
  • Benchmarking performance across time or segments
  • Planning retention investments vs. acquisition investments
  • Assessing new channels, products, or customer segments

Frequently asked questions

What is a good LTV:CAC ratio?
The industry-standard benchmark is 3:1 — meaning LTV should be at least three times CAC. This comes from the rough rule that a third of your customer lifetime revenue goes to acquisition, a third to servicing the customer, and a third is profit and operating leverage. Below 3:1, unit economics get tight. Above 5:1, you may be leaving growth on the table by underinvesting in acquisition.

How is the LTV:CAC ratio calculated?
Simply LTV ÷ CAC. If your LTV is $3,000 and your CAC is $1,000, your ratio is 3:1 (displayed as 3.00:1).

Should I use Blended CAC or Paid CAC in the ratio?
Blended CAC is the more rigorous choice because it includes all acquisition costs — sales salaries, marketing salaries, tools, content, and ad spend. Paid CAC:LTV can look strong while the business overall is unprofitable. Use Blended CAC for board-level and investor reporting. Use Paid CAC:LTV separately to evaluate paid channel efficiency.

Should I use revenue LTV or gross margin LTV in the ratio?
Gross margin LTV is the more accurate and conservative choice. Using revenue LTV inflates the ratio because it ignores the cost of servicing customers. Most rigorous finance teams report the ratio using margin-adjusted LTV, though some benchmarks are quoted on revenue LTV. Be consistent and transparent about which you're using.

What if my LTV:CAC ratio is below 1?
You're losing money on every customer before any other operating costs. Options: reduce CAC (tighten targeting, improve conversion rate, shift to organic channels), increase LTV (raise prices, improve retention, upsell), or exit the channel/segment that's producing unprofitable customers. If the overall ratio is below 1, the business model itself needs reworking.

Can the LTV:CAC ratio be too high?
Yes, surprisingly. A ratio above 5:1 often indicates that you could spend more on growth and still be profitable — meaning you're leaving market share and revenue on the table. Venture-backed startups with strong ratios often deliberately push them down by investing more aggressively in acquisition. Cash-constrained or profit-focused businesses may prefer higher ratios.

How long should my CAC payback period be?
CAC payback is a related but separate metric — it measures how long it takes to recover acquisition cost from customer revenue. Most SaaS benchmarks target CAC payback under 12 months, with best-in-class under 6 months. A strong LTV:CAC ratio with a very long payback period can still signal cash flow problems.

How often should I recalculate LTV:CAC?
Quarterly is a good default for most businesses. Any time you make significant changes to pricing, product, targeting, or channel mix, recalculate. Don't treat LTV:CAC as a static number — it's a moving indicator that should inform ongoing decisions.

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