What is the RD calculator?
The recurring deposit (RD) calculator estimates the future value of a monthly savings plan. Unlike a fixed deposit where you invest a large lump sum all at once, a recurring deposit allows you to invest a fixed amount every month for a set period, earning a fixed interest rate.
Recurring deposits are an excellent tool for salaried individuals who want to build a savings habit. Because you make regular contributions, you do not need a large upfront capital. The interest rate is locked when you open the account, protecting you from falling interest rate cycles.
Saving ₹5,000 every month for 5 years at 7% p.a. totals total deposits over the tenure in deposits; estimated maturity is about an illustrative maturity total (estimated interest interest). Try other installments on the RD calculator.
How do RD calculators work?
RD maturity calculations are more complex than FDs. Each monthly installment compounds for a different length of time. The first installment compounds for the full tenure, while the last installment compounds for only one month.
Our calculator computes interest using the standard formula approved by banks, which assumes quarterly compounding. It calculates the compound interest for each monthly payment based on its time in the account and sums them up.
M = Σ [ P × ( 1 + r / 4 )4 × k / 12 ]
Where –
| M | Maturity value |
|---|---|
| P | Monthly installment amount |
| r | Annual interest rate (as a decimal) |
| k | Number of months each specific installment compounds |
Each monthly payment compounds quarterly for the remaining months left until maturity.
Worked example: A 12-month savings timeline
We trace saving ₹5,000 per month in a recurring deposit for 12 months at an interest rate of 8% p.a. First, the annual interest rate is converted to a quarterly compounding factor: (1 + 0.08 / 4) = 1.02. Each of the 12 installments earns interest for a different duration; the first payment compounds for 12 months, while the final payment compounds for only 1 month.
Summing the compounded values of all 12 installments mathematically, we calculate a total maturity value of ₹62,646. The total principal invested over the year is ₹60,000, resulting in ₹2,646 in interest earnings.
If you had deposited the entire ₹60,000 as a lump-sum FD at the start of the year, your interest gains would be ₹4,888 because the entire principal would compound for the full 12 months. An RD yields less total interest but allows you to build savings gradually from monthly income.
The Friction Section: Penalty for Delay and Tax Deductions
An RD calculator assumes that all payments are made on time and interest compiles without taxes. Real-world deposits face friction points.
First, consider penalties for delayed deposits. If you miss a monthly payment or delay it beyond the bank's grace period, the bank levies a penalty (often ₹1 to ₹2 per ₹100 of installment per month). If you default on multiple installments, the bank may close your RD account prematurely.
Second, look at TDS on RD interest. Just like FDs, banks deduct TDS at 10% if the interest across all deposits in a bank exceeds ₹40,000 in a fiscal year. This tax deduction directly reduces your maturity amount.
Our Take: Why RDs Are Best for Short-Term Commitments
In our experience, RDs are perfect for structured, short-term goals such as holiday planning, paying annual insurance premiums, or building a small emergency fund. However, for long-term goals exceeding 3 years, locking money in an RD is a bad strategy because fixed-income interest rarely beats inflation, meaning your purchasing power shrinks.
If you have a horizon of 3 to 5 years, we recommend looking at debt mutual fund SIPs or equity-oriented SIPs. They offer better post-tax returns and have the potential to beat inflation over time, whereas RDs are fully taxable and offer no inflation protection.
How to use this RD calculator
Enter your monthly deposit amount, set the expected annual interest rate (p.a.), and choose the time period in years. The calculator updates principal, interest, and maturity values instantly.
For a one-time lump-sum deposit instead of monthly installments, try the FD calculator. To plan regular mutual fund investments, try the SIP calculator.
Frequently asked questions
Can I change the monthly installment amount during the RD tenure?
No. The monthly installment amount is fixed at the time of opening the account and cannot be modified. If you want to invest more, you must open a new RD account.
Is RD interest taxable under Indian tax laws?
Yes. The interest earned on a recurring deposit is fully taxable at your income tax slab rate. Banks will deduct TDS at 10% if your annual interest income exceeds ₹40,000 (₹50,000 for senior citizens).
What happens if I close my RD account prematurely?
If you close your RD before maturity, banks will pay interest at the rate applicable for the period the deposit actually remained with the bank, minus a premature withdrawal penalty of 0.5% to 1%.