# FD Calculator – Fixed Deposit

URL: https://speedycalculator.com/calculators/finance/fixed-deposit/
Last updated: 2026-10-25

> The fixed deposit calculator works out the maturity amount and interest of a fixed (term) deposit with quarterly or other compounding – or the regular payout of a non-cumulative deposit that pays interest monthly or quarterly.

## Inputs

- Fixed deposit type
- Principal amount
- Interest rate (per year) (%)
- Term (years, months)
- Compounding frequency

## Results

- Maturity amount
- Payout per interest period
- Total interest
- Total payout (interest + principal)

## Formula

```
Cumulative: maturity = P × (1 + r ÷ n)^(n × t)
Non-cumulative payout per period = P × r ÷ payouts per year (monthly payouts are usually discounted slightly)
Total interest = maturity − principal
```

## Explanation

In India and many other countries, bank fixed deposits compound quarterly. A cumulative FD reinvests the interest until maturity; a non-cumulative FD pays it out regularly, which suits retirees who need income.

### How to use the FD Calculator – Fixed Deposit

- **Fixed deposit type**
- **Principal amount**
- **Interest rate (per year)**
- **Term**
- **Compounding frequency**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Choose the FD type, enter the principal, interest rate, term and compounding.

### Tips

- Use the nominal annual rate and pick the compounding frequency your bank or broker states.
- Small differences in return or fees compound into large differences over decades.
- Run the calculation with a cautious, a central and an optimistic return to see the range of outcomes.
- Past returns do not guarantee future returns – nothing here is investment advice.

### Common mistakes to avoid

- Comparing an APR with an APY or effective rate.
- Ignoring inflation, taxes and fees when judging a real return.
- Entering a percentage as a decimal (5 instead of 0.05 is correct here).

### Inputs explained

FieldWhat to enterFixed deposit typeChoose one: Cumulative (interest reinvested), Non-cumulative – monthly payout, Non-cumulative – quarterly payoutPrincipal amountAmount in your currencyInterest rate (per year)In %TermUnits: years, monthsCompounding frequencyChoose one: Yearly, Semi-annually, Quarterly, Monthly …

### Example values

How the main result changes when **Principal amount** changes and everything else stays at the example values above:

Principal amountMaturity amount50,00061,571.9775,00092,357.95100,000123,143.93125,000153,929.91150,000184,715.9200,000246,287.86

## Worked example

Inputs — Fixed deposit type: Cumulative (interest reinvested); Principal amount: $100,000; Interest rate (per year): 7 %; Term: 3 years; Compounding frequency: Quarterly.

Results — **Maturity amount = $123,143.93**; Payout per interest period = $0.00; Total interest = $23,143.93; Total payout (interest + principal) = $123,143.93.

## FAQ

**How is FD interest calculated?**
Most banks compound quarterly: P × (1 + r/4)^(4t).

**What is the difference between cumulative and non-cumulative FDs?**
Cumulative reinvests interest; non-cumulative pays it out regularly.

**Is FD interest taxable?**
Yes, as income; in India banks deduct TDS above the threshold.

**What formula does the FD Calculator – Fixed Deposit use?**
Cumulative: maturity = P × (1 + r ÷ n)^(n × t).


## Sources

- [Reserve Bank of India](https://www.rbi.org.in/)