Discount points break-even calculator API

Prices discount points (cost = principal*points/100), applies a rate buy-down (default 0.25%/point), and computes the monthly savings, break-even month, and lifetime net savings. Answers 'Is it worth paying for discount points?','When do mortgage points break even?'.

Price$0.01per request

MethodPOST

Route/v1/calc/loan-points-breakeven

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

loanpointsdiscount-pointsbuydownmortgagebreakevencalculator

API URLhttps://x402.hexl.dev/v1/calc/loan-points-breakeven

Integration docs

Example request

{
  "principal": 300000,
  "baseRatePct": 7,
  "points": 2,
  "termMonths": 360
}

Example response

{
  "pointsCost": 6000,
  "boughtDownRatePct": 6.5,
  "basePayment": 1995.91,
  "buydownPayment": 1896.2,
  "monthlySavings": 99.7,
  "breakevenMonths": 60.18,
  "lifetimeNetSavings": 29893.23,
  "worthBuyingPoints": true,
  "formula": "cost = P*points/100; breakeven = cost / monthlySavings",
  "breakdown": {
    "principal": 300000,
    "baseRatePct": 7,
    "points": 2,
    "ratePerPointPct": 0.25,
    "termMonths": 360
  }
}

Input schema

{
  "type": "object",
  "required": [
    "principal",
    "baseRatePct",
    "points",
    "termMonths"
  ],
  "properties": {
    "principal": {
      "type": "number",
      "description": "Loan principal.",
      "examples": [
        300000
      ]
    },
    "baseRatePct": {
      "type": "number",
      "description": "Base annual rate before points, in percent.",
      "examples": [
        7
      ]
    },
    "points": {
      "type": "number",
      "description": "Discount points purchased (1 point = 1% of principal).",
      "examples": [
        2
      ]
    },
    "termMonths": {
      "type": "number",
      "description": "Term in months.",
      "examples": [
        360
      ]
    },
    "ratePerPointPct": {
      "type": "number",
      "description": "Rate reduction per point in percent (default 0.25).",
      "examples": [
        0.25
      ]
    }
  }
}

Output schema

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