{
  "id": "fd",
  "version": "b9f0a85073bc",
  "status": "published",
  "name": "FD Calculator",
  "question": "How much will my FD earn?",
  "summary": "Works out the maturity amount and the interest of a fixed deposit (FD) in rupees from the deposit, the yearly rate, the tenure and how often the bank compounds interest.",
  "category": "finance",
  "subcategory": "india",
  "url": "https://www.acalculator.org/finance/fd-calculator",
  "markdown": "https://www.acalculator.org/finance/fd-calculator.md",
  "kind": "function",
  "method": "m = compoundings a year; q = whole periods in the tenure; L = months left over; A = P × (1 + r ÷ m)^q × (1 + r × L ÷ 12); interest = A − P.",
  "assumptions": [
    "The rate stays the same for the whole tenure, and the interest stays in the deposit until maturity (a cumulative FD).",
    "Months after the last whole compounding period earn simple interest on the grown amount. Banks count the days of a broken period, so their figure can differ by a few rupees.",
    "Tax deducted at source (TDS) and premature withdrawal penalties are not included."
  ],
  "inputs": {
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "type": "object",
    "properties": {
      "p": {
        "title": "Deposit (₹)",
        "description": "The amount in rupees put in the fixed deposit.",
        "type": "number",
        "minimum": 1,
        "maximum": 1000000000000
      },
      "r": {
        "title": "Interest rate a year",
        "description": "The yearly interest rate the bank quotes for the tenure (the simple rate, before compounding).",
        "type": "number",
        "x-unit": "percent",
        "minimum": 0,
        "maximum": 30
      },
      "y": {
        "title": "Tenure: years",
        "description": "Whole years in the tenure.",
        "type": "integer",
        "minimum": 0,
        "maximum": 30
      },
      "m": {
        "title": "and months",
        "description": "Extra months on top of the years.",
        "type": "integer",
        "minimum": 0,
        "maximum": 11
      },
      "c": {
        "title": "Interest compounded",
        "description": "How often the bank adds interest to the deposit. Check your bank’s terms.",
        "type": "string",
        "enum": [
          "monthly",
          "quarterly",
          "half-yearly",
          "yearly"
        ]
      }
    }
  },
  "outputs": {
    "maturity": {
      "label": "Maturity amount (₹)",
      "description": "The deposit plus all the interest at the end of the tenure.",
      "format": "number"
    },
    "deposit": {
      "label": "Deposit (₹)",
      "description": "The amount you put in.",
      "format": "number"
    },
    "interest": {
      "label": "Interest earned (₹)",
      "description": "The maturity amount minus the deposit.",
      "format": "number"
    },
    "yield": {
      "label": "Effective yearly yield",
      "description": "(1 + r ÷ m)^m − 1: what the rate earns in a full year once compounding is included.",
      "format": "percent"
    },
    "periods": {
      "label": "Compounding periods",
      "description": "The whole compounding periods in the tenure.",
      "format": "integer"
    },
    "leftover": {
      "label": "Months at simple interest",
      "description": "Months after the last whole period, paid simple interest.",
      "format": "integer"
    }
  },
  "defaultAnswer": {
    "inputs": {
      "p": 100000,
      "r": 7,
      "y": 5,
      "c": "quarterly"
    },
    "outputs": {
      "maturity": 141477.81957557978,
      "deposit": 100000,
      "interest": 41477.81957557978,
      "yield": 7.185903128906252,
      "periods": 20,
      "leftover": 0
    },
    "text": "₹100,000 in an FD at 7% grows to ₹141,477.82, earning ₹41,477.82."
  },
  "examples": [
    {
      "given": {
        "p": 100000,
        "r": 7,
        "y": 5,
        "c": "quarterly"
      },
      "expect": {
        "maturity": 141477.81957557998,
        "interest": 41477.81957557998,
        "yield": 7.185903128906279,
        "periods": 20
      },
      "source": "hand calculation in content.mdx: 100,000 × 1.0175²⁰; U.S. Securities and Exchange Commission, Investor.gov, Compound interest calculator and formula, https://www.investor.gov/financial-tools-calculators/calculators/compound-interest-calculator (retrieved 2026-10-03)"
    },
    {
      "given": {
        "p": 50000,
        "r": 6.5,
        "y": 1,
        "m": 4,
        "c": "quarterly"
      },
      "expect": {
        "maturity": 54490.25967388803,
        "periods": 5,
        "leftover": 1
      },
      "source": "hand calculation in content.mdx: 5 quarters, then 1 month of simple interest; Reserve Bank of India, Master Direction: Interest Rate on Deposits, 2016 (banks set term deposit rates and must disclose them; premature withdrawal earns the rate for the period the deposit stayed), https://www.rbi.org.in/Scripts/BS_ViewMasDirections.aspx?id=10394 (retrieved 2026-10-03)"
    },
    {
      "given": {
        "p": 10000,
        "r": 4,
        "y": 5,
        "c": "yearly"
      },
      "expect": {
        "maturity": 12166.529024000001,
        "yield": 4.0000000000000036
      },
      "source": "hand calculation in content.mdx: 10,000 × 1.04⁵, the CD calculator’s 5-year example at 4% APY"
    },
    {
      "given": {
        "p": 25000,
        "r": 6,
        "y": 0,
        "m": 2,
        "c": "quarterly"
      },
      "expect": {
        "maturity": 25250,
        "interest": 250,
        "periods": 0
      },
      "source": "hand calculation in content.mdx: under one quarter, simple interest 25,000 × 6% × 2 ÷ 12 = 250"
    },
    {
      "given": {
        "p": 200000,
        "r": 7.2,
        "y": 1,
        "c": "monthly"
      },
      "expect": {
        "maturity": 214884.83354438498,
        "yield": 7.442416772192484
      },
      "source": "hand calculation in content.mdx: 200,000 × 1.006¹²; U.S. Securities and Exchange Commission, Investor.gov, Compound interest calculator and formula, https://www.investor.gov/financial-tools-calculators/calculators/compound-interest-calculator (retrieved 2026-10-03)"
    }
  ],
  "sources": [
    "Reserve Bank of India, Master Direction: Reserve Bank of India (Interest Rate on Deposits) Directions, 2016. https://www.rbi.org.in/Scripts/BS_ViewMasDirections.aspx?id=10394 (retrieved 2026-10-03)",
    "U.S. Securities and Exchange Commission, Investor.gov, Compound interest calculator and formula. https://www.investor.gov/financial-tools-calculators/calculators/compound-interest-calculator (retrieved 2026-10-03)"
  ],
  "related": [
    "cd",
    "rd",
    "sip",
    "compound-interest"
  ],
  "changelog": []
}