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Payback On CAC Calculator

Work out payback on cac instantly with clear inputs, formula shown and shareable results.

About Payback On CAC Calculator

Payback measures how long gross profit takes to repay the cost of winning a customer. It is a cash-flow test rather than a profitability one: a business with strong lifetime value but slow payback still needs funding to grow.

Formula

CAC payback

Payback months = CAC / (monthly revenue × gross margin)

Worked example

With the default values below, Payback On CAC Calculator returns Months To Recover Acquisition Cost of 8.33. Change any input above and every figure here is recalculated in your browser.

Inputs used

Customer Acquisition Costminimum 0
9,000
Monthly Revenue Per Customerminimum 0
1,500
Gross Marginaccepts 0–100 %
72 %
Horizon To Measureaccepts 1–120
24

Results

Months To Recover Acquisition Cost
8.33 months
Gross Profit Per Customer Per Month
$1,080.00
Cumulative Profit Over The Horizon
$16,920.00
Payback In Years
0.69 years

Step by step

  1. 1Values used
  2. 2CAC payback
  3. 3Months To Recover Acquisition Cost= 8.33 months
  4. 4Gross Profit Per Customer Per Month= 1,080.00
  5. 5Cumulative Profit Over The Horizon= 16,920.00
  6. 6Payback In Years= 0.69 years

Assumptions and limits

  • The result is derived only from the 4 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.
  • Figures are estimates based on the inputs given. Marketing performance, platform fees and conversion behaviour vary by audience, channel and season. Use this as a planning guide, not a forecast.
  • 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.

Figures are estimates based on the inputs given. Marketing performance, platform fees and conversion behaviour vary by audience, channel and season. Use this as a planning guide, not a forecast.

Frequently Asked Questions

What payback period is healthy?

Under twelve months is strong for subscription businesses; beyond eighteen months growth becomes capital-hungry.

Why use gross profit rather than revenue?

Because the cost of serving the customer is real cash. Revenue payback flatters any business with meaningful delivery costs.

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