How Does an RD Calculator Work?
A Recurring Deposit (RD) calculator helps you determine the exact maturity value of your monthly savings. RD schemes offered by banks and post offices allow you to deposit a fixed amount every month and earn interest equivalent to a standard Fixed Deposit (FD).
The Mathematical Formula
In India, RD interest is compounded quarterly. The maturity amount is calculated using the following banking formula:
$M = P \times \frac{(1 + r/n)^{nt} - 1}{1 - (1+r/n)^{-1/3}}$
- M = Maturity Value
- P = Monthly Installment (Deposit)
- r = Annual Interest Rate (in decimal)
- n = Number of times interest is compounded per year (Usually 4)
- t = Total tenure of the deposit in years