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SaaS Payback Period Calculator

Work out how many months of gross profit it takes to repay the cost of acquiring a customer.

About SaaS Payback Period Calculator

Simple payback divides the up-front cost by the recurring annual benefit to get the number of years before the customer acquisition has paid for itself. Everything after that point is net gain, which the lifetime figures make explicit. Payback is the first screen most buyers apply: a system that pays back inside its warranty period is a very different proposition from one that does not.

Formula

SaaS Payback Period

Payback (years) = Customer acquisition cost ÷ annual monthly gross profit per customer

Customer acquisition cost
Up-front cost
Monthly gross profit per customer
Recurring saving or return per month

Worked example

With the default values below, SaaS Payback Period Calculator returns Payback Period of 1.28. Change any input above and every figure here is recalculated in your browser.

Inputs used

Customer acquisition costminimum 0
1,200
Monthly gross profit per customerminimum 0
78
Expected lifeaccepts 1–60 years
10 years

Results

Payback Period
1.28 years
Payback Period
15.4 months
Lifetime Saving
$9,360.00
Net Lifetime Benefit
$8,160.00
Lifetime Return
680.0%

Step by step

  1. 1Values used
  2. 2SaaS Payback Period
  3. 3Payback Period= 1.28 years
  4. 4Payback Period= 15.4 months
  5. 5Lifetime Saving= 9,360.00
  6. 6Net Lifetime Benefit= 8,160.00
  7. 7Lifetime Return= 680.0

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is SaaS Payback Period calculated?

Payback (years) = Customer acquisition cost ÷ annual monthly gross profit per customer Simple payback divides the up-front cost by the recurring annual benefit to get the number of years before the customer acquisition has paid for itself. Everything after that point is net gain, which the lifetime figures make explicit.

Why does SaaS Payback Period matter?

Payback is the first screen most buyers apply: a system that pays back inside its warranty period is a very different proposition from one that does not.

What values do I need to enter?

This calculator takes 3 inputs: Customer acquisition cost, Monthly gross profit per customer, Expected life. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.

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