Refinance break-even API

Refinance break-even months = closingCosts / monthlyPaymentSavings, with lifetime savings and a worth-it verdict. Deterministic compare of two amortization schedules. Answers 'when does a refi pay for itself', 'how much do I save per month going 7% to 5.5%', 'is refinancing worth $4k in closing costs'.

Price$0.01per request

MethodPOST

Route/v1/calc/re-refinance-breakeven

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

real-estaterefinancebreakevenmortgagesavingsclosing-costsfinancecalc

API URLhttps://x402.hexl.dev/v1/calc/re-refinance-breakeven

Integration docs

Example request

{
  "balance": 250000,
  "currentRatePct": 7,
  "newRatePct": 5.5,
  "remainingYears": 25,
  "closingCosts": 4000
}

Example response

{
  "currentPayment": 1766.95,
  "newPayment": 1535.22,
  "monthlySavings": 231.73,
  "closingCosts": 4000,
  "breakevenMonths": 17.26,
  "breakevenYears": 1.44,
  "lifetimeSavings": 65518.78,
  "worthIt": true,
  "verdict": "strong (breakeven < 2yr)"
}

Input schema

{
  "type": "object",
  "required": [
    "balance",
    "currentRatePct",
    "newRatePct",
    "remainingYears",
    "closingCosts"
  ],
  "properties": {
    "balance": {
      "type": "number",
      "examples": [
        250000
      ]
    },
    "currentRatePct": {
      "type": "number",
      "examples": [
        7
      ]
    },
    "newRatePct": {
      "type": "number",
      "examples": [
        5.5
      ]
    },
    "remainingYears": {
      "type": "number",
      "examples": [
        25
      ]
    },
    "closingCosts": {
      "type": "number",
      "examples": [
        4000
      ]
    }
  }
}

Output schema

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