RD Calculator - Recurring Deposit Maturity Calculator
Calculate the maturity value of a Recurring Deposit (RD) with quarterly-compounded interest on your fixed monthly installments.
AI Quick Summary
Definition & Purpose:
A Recurring Deposit (RD) is a term deposit that lets you deposit a fixed amount every month into a bank account, earning interest compounded quarterly, similar to a Fixed Deposit but built around monthly contributions rather than a single lump sum.
When to Use:
Use this calculator to project the maturity value of a recurring monthly deposit before opening an RD account, or to compare it against a lump-sum Fixed Deposit.
Key Takeaway Insights:
- Each monthly installment earns interest for a different length of time — the first deposit compounds for nearly the full tenure, while the last deposit barely compounds at all — so the maturity value is the sum of many individually-compounded deposits, not one single calculation.
- RD interest compounds quarterly by standard banking convention, even though deposits themselves are made monthly.
- An RD spreads your savings commitment across the year like a SIP, but pays a fixed, bank-guaranteed rate instead of a market-linked return.
RD Savings Plan
RD Maturity Projection
Introduction
RD Calculator – Recurring Deposit Maturity Projection
A Recurring Deposit (RD) lets you build savings the way a Systematic Investment Plan does — with a fixed amount deposited every month — but pays a fixed, bank-guaranteed interest rate instead of a market-linked return, and compounds that interest quarterly like a standard Fixed Deposit.
This calculator projects your Maturity Amount, Total Invested, and Interest Earned based on your monthly deposit, interest rate, and tenure.
How RD Maturity Is Calculated
Because each monthly deposit sits in the bank for a different length of time, the calculator treats every installment as its own separate compounding deposit. The very first deposit compounds for nearly the entire tenure; the last deposit, made just before maturity, barely compounds at all. Interest is applied quarterly (the standard convention for RDs, even though deposits are monthly), and the maturity amount is the sum of all these individually-compounded installments:
M = sum_k=1^n P × ≤ft(1 + (r / 4 × 100))^(k / 3)
Where:
- M: Total maturity amount.
- P: Fixed monthly deposit.
- r: Annual interest rate.
- n: Total number of monthly deposits.
- k: Number of months a given installment remains on deposit (from 1 up to n).
Worked Example
For a monthly deposit of $1,000 over 1 year (12 months) at an annual rate of 8%:
- Quarterly rate: 8 ÷ 4 ÷ 100 = 0.02
- The first deposit compounds for the full 12 months; the last compounds for just 1 month. Summing the compounded value of all 12 deposits gives M ≈12{,}529.33$
- Total invested: 1{,}000 \times 12 = \12,000.00
- Interest earned: 12{,}529.33 - \12,000.00 =529.33$
Tenure Sensitivity ($5,000/month @ 6.8% p.a.)
| Tenure | Maturity Amount | Total Invested | Interest Earned |
|---|---|---|---|
| 1 year | $62,243.64 | $60,000.00 | $2,243.64 |
| 3 years | $200,058.97 | $180,000.00 | $20,058.97 |
| 5 years | $357,771.11 | $300,000.00 | $57,771.11 |
| 10 years | $858,986.41 | $600,000.00 | $258,986.41 |
RD vs. Fixed Deposit
An RD and an FD both pay a fixed, bank-guaranteed rate — the difference is entirely in how the money goes in. An FD is a single lump sum deposited all at once, so the entire principal compounds from day one. An RD instead builds up gradually through monthly deposits, so only a fraction of your eventual total is actually earning interest in the early months. For the same total amount contributed over the same term, an FD will generally earn more interest than an RD, simply because more money is compounding for longer. Compare the two directly with the FD Calculator.
What This Calculator Does Not Include
Formula & Variables Explained
This tool utilizes standard equations formulated under standard rules.
Variables:
- Input parameter: Values supplied to resolve the output formula.
How to Calculate (Step-by-Step)
- Input the required parameters into the form.
- Click the calculate or auto-compute option.
- The outputs will refresh instantly with step-by-step variables.
Worked Examples Calculation
11-Year RD ($1,000/month @ 8% p.a.)
Monthly Deposit = $1,000, Interest Rate = 8% p.a., Tenure = 12 Months
Quarterly rate = 8/4/100 = 0.02. Each of the 12 monthly deposits compounds for its own remaining term (the first deposit for 12 months, the last for 1 month), summed together: M = sum of P(1+0.02)^(k/3) for k = 12 down to 1 = 12,529.33. Total Invested =1,000 12 = $12,000.00.
Maturity Amount = 12,529.33 | Total Invested =12,000.00 | Interest Earned = $529.33
25-Year RD ($5,000/month @ 6.8% p.a.)
Monthly Deposit = $5,000, Interest Rate = 6.8% p.a., Tenure = 5 Years (60 Months)
Quarterly rate = 6.8/4/100 = 0.017. Summing the compounded value of all 60 monthly deposits gives a maturity amount of $357,771.11.
Maturity Amount = 357,771.11 | Total Invested =300,000.00 | Interest Earned = $57,771.11
Real-World Applications
Widely used in student curriculum, professional projections, and quick estimations.
Limitations & Common Mistakes
- Entering incompatible unit formats (e.g. Mixing Metric and Imperial).
- Typographical mistakes in numeric entry fields.
Assumes a constant interest rate for the full tenure, no missed installments, and standard quarterly compounding. Real banks may compound differently or apply penalties for missed payments.
Frequently Asked Questions (FAQ)
Q:Does the RD interest rate change during the tenure?
No — the interest rate is locked in at the rate offered when you open the Recurring Deposit account, and stays fixed for the full tenure regardless of how market rates move afterward.
Q:Is there a penalty for missing a monthly RD payment?
Most banks charge a small penalty fee for a missed monthly installment, and repeated missed payments can lead to the account being closed prematurely, sometimes with reduced interest on whatever was already deposited.
Q:Can I withdraw a Recurring Deposit before maturity?
Yes, premature withdrawal is generally allowed, but banks typically apply a penalty — often a reduced interest rate (commonly 0.5% to 1% lower than the contracted rate) for the time the deposit was actually held, and partial withdrawals usually aren't permitted.
Q:Is RD interest taxable?
In most jurisdictions, interest earned on a Recurring Deposit is fully taxable as regular income according to your applicable tax bracket. Some countries also require banks to withhold tax at source once total interest across your deposits crosses a set threshold in a financial year.
References & Citations
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