Home›Articles›How To›RD Maturity Calculation

HOW TO

How to Calculate Recurring Deposit Maturity Amount

Step-by-step guide to calculating recurring deposit maturity — how each monthly instalment compounds separately, with a full worked example and formula.

Updated 2026-07-19

Free calculators used in this guide

Recurring Deposit Calculator Fixed Deposit Calculator

Overview

Unlike a fixed deposit, where one lump sum compounds for a single stretch of time, a recurring deposit involves a new instalment every month — and each of those instalments has a different amount of time left to compound before the RD matures. The first month's deposit earns interest for almost the entire tenure; the last month's deposit barely earns anything at all. Getting the maturity calculation right means accounting for that instalment-by-instalment difference, not applying a single compound interest formula the way you would for an FD.

This walkthrough covers the exact summation formula banks use for RD maturity, works through a full example, and explains why your effective yield on an RD always looks lower than the quoted rate. Use the Recurring Deposit Calculator alongside this for instant results on your own numbers.

What You Need

Monthly deposit amount — the fixed sum you'll deposit every month for the tenure
Interest rate — the annual rate your bank quotes for that specific RD tenure slab
Tenure — the total number of monthly instalments, typically 6 months to 10 years
Compounding frequency — usually quarterly at Indian banks, occasionally monthly

Steps

Step 1: Understand why RD can't use a single compound interest formula

An FD has one principal that compounds for the full tenure in a single calculation. An RD has many separate deposits, each made at a different point in time, so each one compounds for a different remaining duration. The first instalment is invested for nearly the whole tenure; the twelfth instalment (in a 12-month RD) is invested for barely any time before maturity. There's no shortcut single-step formula that captures this — the maturity amount has to be built up by compounding each instalment individually, then summing all of them.

Step 2: Apply the RD maturity formula

The formula sums the compounded future value of every monthly instalment:

FV = Σ P × (1 + r/n)^(n × tₖ), for k = 1 to total months

Where:

FV = maturity amount
P = fixed monthly deposit
r = annual interest rate (as a decimal)
n = compounding frequency per year (usually 4 = quarterly)
tₖ = remaining time in years for instalment k until maturity

Worked example: depositing ₹5,000 per month for 60 months (5 years) at 7.1% per annum, compounded quarterly:

Instalment 1 compounds for close to 60 months
Instalment 60 (the last one) compounds for barely any time
FV = sum of all 60 individually compounded instalments = ₹3,60,615

Total deposited over the tenure: ₹5,000 × 60 = ₹3,00,000. Interest earned: ₹3,60,615 − ₹3,00,000 = ₹60,615.

Step 3: Calculate the effective yield — and expect it to look lower than the quoted rate

Effective Yield = (FV ÷ Total Deposited)^(12/tenure_in_months) − 1

For the example above: (3,60,615 ÷ 3,00,000)^(12/60) − 1 = 3.75%. This is well below the nominal 7.1% rate quoted by the bank, and that's not a mistake — it's just how recurring contributions work mathematically. The average instalment in this RD was invested for roughly 2.5 years out of the 5-year tenure, not the full 5 years, so the effective yield on your total deposited amount comes out lower than the rate any single rupee actually earned.

Step 4: Compare against a shorter tenure

The gap between nominal rate and effective yield shrinks for shorter tenures, since the average holding time gets closer to the full tenure. Depositing ₹10,000/month for just 12 months at 6.5% compounded quarterly produces a maturity amount of ₹1,24,286, with ₹4,286 in interest — an effective yield of 3.57%, still noticeably below the nominal 6.5% rate but a smaller absolute gap than the 60-month example.

Step 5: Account for compounding frequency

Like FDs, RDs typically compound quarterly at most Indian banks, though some offer monthly compounding. Switching n from 4 to 12 in the formula slightly raises the maturity amount, since each instalment's interest is folded back into the balance more often — but the difference is modest, and the far bigger factor in your final maturity amount is simply the tenure and the monthly deposit size.

Common Mistakes to Avoid

Expecting the effective yield to match the quoted rate. This is the single most common point of confusion with RDs. A lower effective yield than the nominal rate is completely normal and doesn't mean you're getting a worse deal — it's a direct mathematical consequence of contributions being spread out rather than invested as a lump sum.

Assuming a missed instalment has no consequence. Most banks apply a small penalty for missed monthly deposits and may require you to catch up before maturity. Repeated missed payments can also trigger early account closure, both of which will produce a maturity amount below what the clean formula projects.

Comparing RD rates across banks without checking the tenure slab. Banks often quote different rates for different RD tenure brackets — a 12-month RD and a 60-month RD at the same bank frequently carry different rates. Always compare the rate for your specific intended tenure, not a generic headline rate.

Confusing RD maturity math with FD math. Applying a single compound interest calculation (as you would for an FD) to an RD's total deposited amount will overstate the maturity value, since it ignores that later instalments have far less time to compound than earlier ones.

Formula & Methodology

RD maturity (summation of individually compounded instalments):

FV = Σ P × (1 + r/n)^(n × tₖ), for k = 1 to total months
Total Interest = FV − (P × total months)

Effective annualised yield:

Effective Yield = (FV ÷ Total Deposited)^(12/tenure_in_months) − 1

For the full variable breakdown and formula derivation, see the RD Maturity Formula page. If you're deciding between a lump sum FD and a monthly RD for the same savings target, How to Calculate Fixed Deposit Maturity Amount covers the equivalent FD calculation, and FD vs RD: Which Is Better for Short-Term Savings? compares the two head to head.

Frequently Asked Questions

What's the RD maturity formula, exactly?

FV = Σ P × (1 + r/n)^(n × tₖ), summed for every instalment k from 1 to the total number of months, where tₖ is the remaining time in years for that specific instalment. Unlike an FD, there's no single-step calculation — you're compounding each monthly deposit separately for however long it has left until maturity, then adding all of those up. For ₹5,000/month over 60 months at 7.1% compounded quarterly, this sums to ₹3,60,615.

Why is my RD's effective yield so much lower than the interest rate the bank quoted?

Because the quoted rate assumes money sitting invested for the full tenure, but with an RD the average instalment is only invested for roughly half that time. On ₹5,000/month for 60 months at a nominal 7.1%, the effective annual yield works out to just 3.75% on the total deposited amount — not because you're being shortchanged, but because your last few instalments barely have any time to earn interest before maturity.

Does RD interest compound the same way FD interest does?

Yes, both typically use quarterly compounding at Indian banks and the same underlying (1 + r/n)^(n×t) formula. The difference is purely in how many times you apply it — an FD compounds one lump sum once for the full tenure, while an RD applies the formula separately to each monthly instalment, since every deposit has a different amount of time left until maturity.

What happens if I miss a monthly RD instalment?

Most banks charge a small penalty, typically ₹1–₹15 per ₹1,000 of the missed instalment per month, and some require you to make up the missed deposit before the RD matures. A few consecutive missed payments can also lead the bank to close the account early. This formula assumes every instalment is paid exactly on schedule — real-world missed payments will always produce a maturity amount slightly below what a clean calculation projects.

Can I calculate RD maturity for a non-standard tenure, like 8 months or 27 months?

Yes — most Indian banks allow RD tenures from 6 months to 10 years in monthly increments, and the summation formula works for any whole number of months. There's no requirement that the tenure be a round number of years; just plug in the actual number of monthly instalments as your total k value in the summation.

Is RD interest taxable?

Yes, fully, at your income tax slab rate, the same as FD interest. Banks deduct TDS at 10% if your total interest across RDs with that bank crosses ₹40,000 in a financial year (₹50,000 for senior citizens), but your actual liability depends on your total taxable income, not just the TDS deducted.

Why does the first instalment earn so much more interest than the last one?

Because the first instalment sits invested and compounding for almost the entire tenure, while the last instalment barely has time to earn anything before the RD matures. On a 60-month RD, the first ₹5,000 deposit compounds for close to 5 years, but the final ₹5,000 deposit compounds for less than a month — the formula's month-by-month summation is what captures this uneven contribution from each instalment.

How does an RD's maturity calculation compare to a step-up SIP's?

Both sum up multiple contributions that each compound for a different remaining duration, but an RD uses a fixed monthly amount at a guaranteed bank rate, while a step-up SIP increases the contribution amount periodically and invests in market-linked mutual funds with no guaranteed return. The underlying math — summing individually compounded instalments — is conceptually similar, but RD math uses a fixed rate you can calculate exactly, whereas a SIP or step-up SIP projection depends on an assumed return that may not materialise.

Can I calculate RD maturity if my bank offers monthly compounding instead of quarterly?

Yes, just change n in the formula from 4 (quarterly) to 12 (monthly) — the summation logic stays identical. Monthly compounding produces a marginally higher maturity amount than quarterly for the same nominal rate, since each instalment's interest gets folded back into the balance more frequently, though the difference is small compared to the gap between quarterly and annual compounding.

Does depositing on a fixed date each month affect the maturity calculation?

The formula assumes each instalment is deposited on schedule every month, so consistently depositing on the same date (say, the 5th) keeps your actual maturity amount matching the calculated projection. Depositing late in a given month doesn't usually cost you interest the way a late PPF deposit does, since RD interest calculation is based on the deposit date itself rather than a fixed cutoff — but consistently late payments can trigger the missed-instalment penalty if they slip past the bank's grace period.

Is a longer RD tenure always better for the final maturity amount?

A longer tenure means more total instalments and more total interest in absolute rupee terms, but it doesn't necessarily mean a better effective yield — that depends on how the rate itself varies by tenure at your bank, since many banks offer different rates for different RD tenure slabs. Compare the actual quoted rate for each tenure option before assuming longer is automatically better; a shorter RD at a higher promotional rate can sometimes out-yield a longer one at a lower rate.