{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://askcalculators.com/calculator/interest-calculator/schema.json",
  "title": "Interest Calculator inputs",
  "description": "Project compound growth with a nominal annual rate, selected compounding frequency, and end-of-month contributions.",
  "type": "object",
  "properties": {
    "principal": {
      "title": "Principal Amount",
      "type": "number",
      "default": 10000
    },
    "rate": {
      "title": "Annual Interest Rate",
      "type": "number",
      "default": 5
    },
    "time": {
      "title": "Time Period (Years)",
      "type": "number",
      "default": 10
    },
    "contribution": {
      "title": "Monthly Contribution",
      "type": "number",
      "default": 0
    },
    "compoundFreq": {
      "title": "Compounding Frequency",
      "type": "string",
      "default": "12"
    }
  },
  "required": [],
  "additionalProperties": false,
  "x-askcalculators": {
    "version": "7.0.0",
    "calculatorUrl": "https://askcalculators.com/calculator/interest-calculator/",
    "queryExample": "https://askcalculators.com/calculator/interest-calculator/?principal=10000&rate=5&time=10&contribution=0&compoundFreq=12",
    "migrationStatus": "migrated",
    "reviewStatus": "pending",
    "pageStatus": "live",
    "workStatus": "pending",
    "migratedDate": "2026-08-18",
    "formula": {
      "expression": "Effective monthly rate = (1 + nominal annual rate ÷ compounds per year)^(compounds per year ÷ 12) − 1; each month balance grows by that rate, then the entered contribution is added."
    },
    "quality": {
      "availability": "live",
      "technicalReviewRecord": "/reviews/interest-calculator.json",
      "qualifiedReview": "pending",
      "qualifiedReviewer": null,
      "qualifiedReviewDate": null,
      "formulaVersion": "7.0.0",
      "referenceCoverage": "references-pending",
      "releaseTestScope": "Catalog and regression checks are not a professional formula audit; consult release evidence.",
      "historicalMetadataDate": "2026-08-18",
      "historicalMetadataNotice": "The imported date is not evidence of a completed human review."
    },
    "outputs": {
      "result": {
        "title": "Result",
        "type": "string",
        "x-format": "text",
        "x-primary": true
      }
    }
  }
}