The SUPRAVAT.IN RD Calculator helps you estimate how much your recurring deposit will grow over its tenure. Enter your monthly deposit, the interest rate, the tenure and the compounding frequency, and it instantly shows the maturity amount and the total interest earned — all formatted in Indian ₹.
What a recurring deposit is
A recurring deposit (RD) is a savings instrument where you commit to depositing a fixed amount every month with a bank or financial institution for a chosen tenure at a fixed interest rate. Each monthly installment earns interest for the remaining period of the RD and the full maturity amount is paid out at the end of the term. Because the rate is locked in, an RD offers predictable returns and is a popular way to build a savings habit with small, regular contributions.
How an RD differs from an FD
A fixed deposit (FD) is a single lump-sum deposit that earns interest over the whole tenure from day one. A recurring deposit (RD), by contrast, is built from many smaller monthly deposits. Because each installment is paid in at a different time, each one earns interest only for the period from its deposit date until maturity. The first installment earns interest for almost the entire tenure, while the last installment earns interest for only a short period. This is why an RD cannot be calculated with the simple FD lump-sum formula — the timing of every installment matters.
How an RD calculator works
An RD calculator applies the recurring-deposit annuity formula to your inputs. Used as an RD maturity calculator, it takes your monthly deposit, annual interest rate, tenure and compounding frequency and computes the maturity amount in one step. Used as an RD interest calculator, it shows the total interest earned separately, so you can see exactly how much of your maturity value comes from interest growth rather than from your own contributions.
How monthly deposits affect maturity
The monthly deposit is the amount you contribute each month. A larger monthly deposit means more money accumulates and more interest is earned on every installment, so both the total deposits and the maturity amount grow proportionally. Doubling the monthly deposit (at the same rate and tenure) roughly doubles the total deposits, the interest earned and the maturity value.
How interest rate affects returns
The interest rate is the annual percentage your recurring deposit earns. A higher rate increases the interest earned on every installment, so both the total interest and the maturity amount grow. Even a small rate difference adds up over longer tenures, which is why comparing RD rates across banks before opening one is useful. This recurring deposit interest calculator lets you test different rates and instantly see the impact.
How tenure affects maturity
Tenure is how long your RD runs. A longer tenure means more monthly installments and more time for each installment to earn interest, so the total deposits, the total interest and the maturity amount all increase when the rate is positive. You can calculate RD maturity for any tenure in years or months — the calculator converts years into the correct number of monthly installments automatically.
Why the number and timing of installments matter
Because each monthly installment earns interest only from the month it is deposited, the number of installments and their timing directly decide the maturity value. More installments mean more contributions and a longer earning period for the earliest ones. The first installment compounds for nearly the full tenure while the final installment barely earns any interest, so the order and count of deposits — not just the total amount saved — shape your final RD maturity amount.
RD maturity formula (recurring-deposit annuity):
Maturity Amount = P × [((1 + i)n − 1) / i]
Total Deposits = P × n
Interest Earned = Maturity Amount − Total Deposits
where P = monthly deposit, i = effective monthly interest rate derived from the annual rate and the selected compounding frequency, and n = number of monthly installments.
For quarterly compounding the annual rate is first converted to a quarterly rate (annual rate ÷ 4), then to an equivalent effective monthly rate so each installment earns interest consistently on a monthly basis. Half-yearly and yearly compounding are converted the same way. At 0% interest, i = 0 and Maturity Amount = Total Deposits, so Interest Earned = ₹0.
This RD calculator India tool provides estimates based on the inputs you enter. RD maturity calculations can vary depending on the financial institution's interest calculation method and compounding conventions, installment dates, tenure rules and other terms. It does not promise any actual bank return. Always confirm the exact maturity value with your bank or financial institution before opening a recurring deposit.
