Customer LTV & LTV:CAC ratio API

Customer lifetime value = (ARPU x grossMargin) / churnRate, with average lifetime = 1/churn and an optional LTV:CAC ratio against acquisition cost — the standard SaaS/subscription unit-economics model. Answers 'what's my customer LTV', 'what's my LTV to CAC ratio', 'is my acquisition spend sustainable'.

Price$0.01per request

MethodPOST

Route/v1/calc/biz-customer-ltv

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

calcltvcacunit-economicssaassubscriptionopsfinance

API URLhttps://x402.hexl.dev/v1/calc/biz-customer-ltv

Integration docs

Example request

{
  "arpu": 100,
  "grossMargin": 0.7,
  "churnRate": 0.05,
  "cac": 400
}

Example response

{
  "formula": "LTV = (ARPU * grossMargin) / churnRate",
  "lifetimeValue": 1400,
  "averageLifetimeMonths": 20,
  "inputs": {
    "arpu": 100,
    "grossMargin": 0.7,
    "churnRate": 0.05
  },
  "cac": 400,
  "ltvCacRatio": 3.5,
  "rating": "healthy"
}

Input schema

{
  "type": "object",
  "required": [
    "arpu",
    "grossMargin",
    "churnRate"
  ],
  "properties": {
    "arpu": {
      "type": "number",
      "description": "average revenue per user per period",
      "examples": [
        100
      ]
    },
    "grossMargin": {
      "type": "number",
      "description": "decimal 0-1",
      "examples": [
        0.7
      ]
    },
    "churnRate": {
      "type": "number",
      "description": "decimal per period, 0-1",
      "examples": [
        0.05
      ]
    },
    "cac": {
      "type": "number",
      "examples": [
        400
      ]
    }
  }
}

Output schema

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