SaaS Lifetime Value Calculator

Written by Great Medico

Updated September 25, 2026 •2 min read

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SaaS Lifetime Value Calculator is designed for a quick operational check: enter the figures you already have, review the calculation, and use the result as a starting point for a more detailed decision.

What this calculator does

SaaS Lifetime Value Calculator estimates SaaS customer lifetime value from ARPA, gross margin, churn, and the account-expansion assumption used by this model. It uses only the information collected by this interface; costs, taxes, rates, market data, or operating assumptions that are not shown are not silently added to the result.

How to use it

Enter Currency, Average revenue per account (ARPA), Gross margin, Churn, and Account expansion. Use figures from the same reporting period and the same accounting, workforce, inventory, or campaign definition wherever possible. The currency selector changes display currency only; it does not perform an exchange-rate conversion. Before using the result in a decision, recheck unusually large or negative values against the source data rather than assuming the calculator is correcting an inconsistent input.

How the calculation works

The current SaaS LTV model uses monthly churn to estimate lifetime as 1 ÷ churn. It then combines ARPA, gross margin, and the entered account-expansion amount in the calculator’s stored lifetime-value equation. With zero expansion, the expression reduces to ARPA × gross margin ÷ churn.

Example

At $250 ARPA, 65% gross margin, and 4% monthly churn, expected lifetime is 25 months. With zero account expansion, the model gives an LTV of about $4,062.5.

How to interpret the result

Use the result as a compact description of the inputs you supplied. Compare it with the same metric calculated consistently over time or across alternatives; the number is most useful when its accounting period, denominator, and business definition remain stable.

Limitations and notes

The calculation is only as consistent as its inputs. Accounting policy, attribution rules, period length, one-time items, seasonality, and local reporting conventions can change what should be included in a numerator or denominator. Use the same definitions when comparing periods, and do not treat a simplified ratio as a complete operational diagnosis.