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Business & Tax
Understand and calculate customer lifetime value (CLV) to optimize acquisition spending and retention.
By FreeCalculators Editorial · Published 2026-09-01 · Updated 2026-09-04 · 4 min read · 1,002 words
Customer lifetime value is the total gross profit one customer produces over the whole relationship, discounted back to today. It sets the ceiling on what you can rationally pay to acquire a customer: at a target of three dollars of value per dollar of acquisition cost, a CLV of $3,600 justifies a CAC up to $1,200. Calculated on revenue instead of gross profit, the same customer can appear to justify three times too much spending.
There are three practical forms. Use the simplest one your data supports, and write down which one you used, because a CLV quoted without its formula is not comparable to anything.
For the discounted form, anchor the discount rate to a real cost of capital rather than a habit. The Federal Reserve publishes reference interest rates in its regular H.15 release, and a small business rate is typically several points above those, so a 12 to 15 percent annual discount rate is a defensible planning assumption for most owner-funded firms.
| Input | Where the figure comes from | Typical error |
|---|---|---|
| Average order value | Total revenue divided by orders, same period | Including one-off enterprise deals in a consumer average |
| Gross margin | Revenue minus delivery cost: COGS, support, processing, returns | Using operating margin, which double-counts overhead |
| Purchase frequency | Orders per customer per year from a full year of data | Annualising a launch quarter |
| Churn or retention | Cohort survival month over month | Using aggregate churn while cohorts differ sharply |
| Lifetime cap | A stated maximum, often 3 to 5 years | Letting a 2% churn rate imply a 50-month tail with no cap |
Run the simple and the discounted form side by side on one customer and the gap becomes obvious. The revenue-based version is shown too, because it is the number most often quoted in a pitch deck and it is the one that sets an acquisition budget the business cannot fund.
Two CLV calculations on the same customer (2026)
Monthly subscription price ............ $ 140 Cost of delivery ...................... $ 38 Monthly gross profit .................. $ 102 Monthly churn ......................... 2.5% Implied lifetime = 1 / 0.025 .......... 40 months Simple CLV = $102 x 40 ................ $ 4,080 Discounted at 12% a year (1% a month) Effective divisor = 0.025 + 0.01 .... 0.035 CLV = $102 / 0.035 .................. $ 2,914 Revenue-based CLV (wrong) $140 / 0.025 ....................... $ 5,600 Max CAC at a 3x target On discounted CLV .................. $ 971 On revenue CLV ..................... $ 1,867
CLV is only useful as a decision input. Three decisions follow directly: the maximum you will pay for a customer, which segments deserve the sales effort, and how much retention work is worth. If your best segment has three times the CLV of your worst, the acquisition budget should not be spread evenly across both.
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How this guide was created
This guide was written and reviewed by FreeCalculators Editorial, drawing on published formulas, official government sources, and real calculator outputs from our 4 calculators in this category. Every claim is sourced; every formula is auditable. Read our review policy.