What is FD?
An FD or Fixed Deposit is an investment offered by banks and financial institutions in which you deposit a lump sum for a fixed period at a fixed rate of interest. The rate is locked in when you open the deposit, so market movements do not affect your returns.
FDs are one of the most popular savings options in India because they are simple, predictable and low-risk.
The interest on an FD is usually compounded, most often quarterly, which means the interest you earn is added to your deposit and earns interest of its own.
Fun fact
The more often interest is compounded, the more you earn. Quarterly compounding gives a slightly higher maturity amount than yearly compounding at the same rate.
What is an FD Calculator?
An FD calculator works out the maturity amount of your fixed deposit and the interest you will earn, based on the amount invested, the rate of interest, the time period and how often interest is compounded.
The result is an estimate before tax. Interest earned on an FD is taxable, and the actual amount you receive also depends on your bank’s exact terms.
Why you should use an FD Calculator?
- Quick results: Know your maturity amount instantly, without working out compound interest by hand.
- Plan your goals: Find out how much you need to deposit today to reach a target amount.
- Helps in comparison: Compare rates, time periods and compounding frequencies across banks before you invest.
How Does an FD Calculator Work?
The FD calculator works on the following inputs:
- Total Investment (P): The amount you deposit.
- Rate of Interest (R): The yearly rate of interest offered on the FD.
- Time Period (T): Number of years for which you keep the deposit.
- Compounding Frequency (n): How many times a year interest is added: 1 for yearly, 2 for half-yearly, 4 for quarterly.
The FD Calculator relies on the following formula:
Maturity Amount = P × (1 + R ÷ (100 × n))^(n × T)
- P
- Total Investment
- R
- Rate of Interest per year
- n
- Number of times interest is compounded in a year
- T
- Time Period in years
Let’s work through an example for better understanding.
Formula to Calculate FD Returns with an Example
Consider an example for a better understanding.
- Total Investment: ₹1,00,000
- Rate of Interest: 7% per annum
- Time Period: 5 years
- Compounding Frequency: Quarterly
Using the formula:
A = 1,00,000 × (1 + 7 ÷ 400)^(4 × 5)
After calculation, your FD will mature to approximately ₹1,41,478, earning ₹41,478 in interest. With yearly compounding, the same FD would mature to ₹1,40,255.
What are the benefits of investing in an FD?
- Guaranteed returns: The interest rate is fixed when you open the FD, so you know your returns in advance.
- Low risk: Your returns are not affected by market ups and downs.
- Flexible tenure: Choose a time period that matches your goal, from a few months to many years.