CAC payback period calculator API

Compute CAC payback months = CAC / (ARPA * grossMargin), the time for a customer's margin to recover acquisition cost, with a fast/moderate/slow rating. Answers 'how long to pay back CAC','what's my payback period in months'.

Price$0.01per request

MethodPOST

Route/v1/calc/mkt-payback

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

calcmarketingpaybackcacsaasunit-economicsmarginmetrics

API URLhttps://x402.hexl.dev/v1/calc/mkt-payback

Integration docs

Example request

{
  "cac": 600,
  "arpa": 90,
  "grossMargin": 0.75
}

Example response

{
  "formula": "paybackMonths = CAC / (ARPA * grossMargin)",
  "cac": 600,
  "arpa": 90,
  "grossMargin": 0.75,
  "monthlyContribution": 67.5,
  "paybackMonths": 8.89,
  "rating": "fast (<=12mo)"
}

Input schema

{
  "type": "object",
  "required": [
    "cac",
    "arpa"
  ],
  "properties": {
    "cac": {
      "type": "number",
      "examples": [
        600
      ]
    },
    "arpa": {
      "type": "number",
      "description": "monthly avg revenue per account",
      "examples": [
        90
      ]
    },
    "grossMargin": {
      "type": "number",
      "description": "decimal in (0,1], default 1",
      "examples": [
        0.75
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}