{
  "id": "mortgage-payoff-calculator",
  "version": "20.1.0",
  "name": "Mortgage Payoff Calculator",
  "shortName": "Mortgage Payoff",
  "description": "See how much time and interest you can save by making extra payments on your mortgage.",
  "category": "Finance",
  "categorySlug": "finance",
  "keywords": [
    "mortgage",
    "payoff"
  ],
  "status": "live",
  "workStatus": "pending",
  "reviewStatus": "pending",
  "migrationStatus": "migrated",
  "migratedDate": "2026-08-18",
  "engine": "legacy-react",
  "creator": null,
  "reviewer": null,
  "quality": {
    "availability": "live",
    "technicalReviewRecord": "/reviews/mortgage-payoff-calculator.json",
    "qualifiedReview": "pending",
    "qualifiedReviewer": null,
    "qualifiedReviewDate": null,
    "formulaVersion": "20.1.0",
    "referenceCoverage": "references-listed",
    "releaseTestScope": "Flagship reference cases are specified in scripts/test-v20-1.mjs; consult release evidence for executed results.",
    "historicalMetadataDate": "2026-08-18",
    "historicalMetadataNotice": "The imported date is not evidence of a completed human review."
  },
  "urls": {
    "page": "/calculator/mortgage-payoff-calculator/",
    "definition": "/calculator/mortgage-payoff-calculator/definition.json",
    "schema": "/calculator/mortgage-payoff-calculator/schema.json",
    "llms": "/calculator/mortgage-payoff-calculator/llms.txt",
    "legacyDefinition": "/calculator/mortgage-payoff-calculator.json"
  },
  "queryExample": "https://askcalculators.com/calculator/mortgage-payoff-calculator/?balance=250000&rate=6.5&currentPayment=1800&extraPayment=200",
  "queryParameters": {
    "balance": {
      "label": "Current Balance ($)",
      "type": "number",
      "required": false,
      "default": 250000
    },
    "rate": {
      "label": "Interest Rate (%)",
      "type": "number",
      "required": false,
      "default": 6.5
    },
    "currentPayment": {
      "label": "Current Monthly Payment ($)",
      "type": "number",
      "required": false,
      "default": 1800
    },
    "extraPayment": {
      "label": "Extra Monthly Payment ($)",
      "type": "number",
      "required": false,
      "default": 200
    }
  },
  "inputs": [
    {
      "id": "balance",
      "label": "Current Balance ($)",
      "type": "number",
      "defaultValue": 250000
    },
    {
      "id": "rate",
      "label": "Interest Rate (%)",
      "type": "number",
      "defaultValue": 6.5
    },
    {
      "id": "currentPayment",
      "label": "Current Monthly Payment ($)",
      "type": "number",
      "defaultValue": 1800
    },
    {
      "id": "extraPayment",
      "label": "Extra Monthly Payment ($)",
      "type": "number",
      "defaultValue": 200
    }
  ],
  "outputs": [
    {
      "id": "originalMonths",
      "label": "Original payoff months",
      "format": "number"
    },
    {
      "id": "newMonths",
      "label": "Accelerated payoff months",
      "format": "number"
    },
    {
      "id": "interestSaved",
      "label": "Interest saved",
      "format": "currency",
      "primary": true
    },
    {
      "id": "monthsSaved",
      "label": "Months saved",
      "format": "number"
    }
  ],
  "formula": {
    "expression": "Each month: interest = balance × monthly rate; payment = min(planned payment, balance + interest); new balance = balance + interest − payment. The two plans are simulated until payoff."
  },
  "examples": [
    {
      "label": "Reproducible default-input example (not a personal recommendation)",
      "inputs": {
        "balance": 250000,
        "rate": 6.5,
        "currentPayment": 1800,
        "extraPayment": 200
      }
    }
  ],
  "sources": [
    {
      "label": "CFPB: how paying down a mortgage works",
      "url": "https://www.consumerfinance.gov/ask-cfpb/how-does-paying-down-a-mortgage-work-en-1943/"
    }
  ]
}