PMI-drop month (LTV threshold) API

Amortizes the loan to find the month the balance crosses the PMI-cancellation LTV (default 80% of original price), returning drop month/year and balance at drop. Answers 'when can I drop PMI', 'what month does my loan hit 80% LTV', 'how long until I can request PMI removal'.

Price$0.01per request

MethodPOST

Route/v1/calc/re-pmi-drop

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

real-estatepmiltvmortgageamortizationinsurancefinancecalc

API URLhttps://x402.hexl.dev/v1/calc/re-pmi-drop

Integration docs

Example request

{
  "homePrice": 400000,
  "loanAmount": 360000,
  "annualRatePct": 6.5,
  "termYears": 30
}

Example response

{
  "startLtvPct": 90,
  "thresholdLtvPct": 80,
  "pmiRequired": true,
  "dropMonth": 95,
  "dropYears": 7.92,
  "targetBalance": 320000,
  "balanceAtDrop": 319707.73
}

Input schema

{
  "type": "object",
  "required": [
    "homePrice",
    "loanAmount",
    "annualRatePct",
    "termYears"
  ],
  "properties": {
    "homePrice": {
      "type": "number",
      "examples": [
        400000
      ]
    },
    "loanAmount": {
      "type": "number",
      "examples": [
        360000
      ]
    },
    "annualRatePct": {
      "type": "number",
      "examples": [
        6.5
      ]
    },
    "termYears": {
      "type": "number",
      "examples": [
        30
      ]
    },
    "thresholdLtvPct": {
      "type": "number",
      "default": 80
    }
  }
}

Output schema

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