# FD Calculator

> Maturity value and interest on a bank fixed deposit, with monthly, quarterly, half-yearly or yearly compounding.

Interactive calculator: https://www.cashiq.in/tools/fd-calculator
Last updated: 2026-11-10

An FD calculator shows what a fixed deposit pays at maturity. Most Indian banks compound FD interest quarterly. ₹1,00,000 at 7% for 5 years, compounded quarterly, matures at ₹1,41,478, earning ₹41,478 before tax.

## How it is calculated

```
A = P × (1 + r/n)^(n × t)
```

- P is the deposit, r the annual rate as a decimal, t the tenure in years.
- n is the number of compounding periods a year: 4 for quarterly, the usual bank method.
- This is the cumulative (reinvestment) option. With monthly or quarterly payout, interest is paid out instead of compounding.

## Worked example

- Inputs: ₹1,00,000 at 7% for 5 years, compounded quarterly
- Result: Maturity value ₹1,41,478, interest ₹41,478
- Open it: https://www.cashiq.in/tools/fd-calculator?principal=100000&rate=7&years=5&compounding=quarterly

## Use it with your own numbers

Add query parameters to the calculator URL. The page renders the result, a one-sentence summary and a year-by-year table in its HTML.

| Parameter | Meaning | Allowed values |
| --- | --- | --- |
| `principal` | Deposit amount | 1,000 to 10,00,00,000 |
| `rate` | Interest rate (% a year) | 1 to 15 |
| `years` | Tenure (years) | 1 to 10 |
| `compounding` | Compounding | monthly | quarterly | half-yearly | yearly |

Example: https://www.cashiq.in/tools/fd-calculator?principal=100000&rate=7&years=5&compounding=quarterly

JSON API: https://www.cashiq.in/api/v1/fd-calculator?principal=100000&rate=7&years=5&compounding=quarterly

## Rules and assumptions

- FD interest is added to your income and taxed at your slab rate.
- Banks deduct 10% TDS when your interest from one bank exceeds ₹50,000 in a year (₹1,00,000 for senior citizens), from FY 2025-26. Form 15G or 15H can avoid TDS if your income is below the taxable limit.
- Deposits are insured by DICGC up to ₹5 lakh per depositor per bank, including interest.

## Frequently asked questions

### How is FD interest calculated?

With compound interest: A = P × (1 + r/n)^(n × t). Most banks compound quarterly, so n = 4.

### Is FD interest taxable?

Yes. It is added to your income and taxed at your slab rate, whether you take it out or it is reinvested.

### Do senior citizens get a higher FD rate?

Most banks pay senior citizens an extra 0.25% to 0.50% a year. Enter the senior rate in the calculator.

### What happens if I break an FD early?

Banks usually pay the rate for the period the money actually stayed, minus a penalty, often 0.5% to 1%.

## Sources

- [Reserve Bank of India](https://www.rbi.org.in/)
- [Income Tax Department](https://www.incometax.gov.in/)

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Results are estimates for planning, not investment, tax or legal advice. Returns are assumptions, not guarantees. Source: CashIQ, https://www.cashiq.in/tools/fd-calculator