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An RD calculator answers a question every disciplined saver eventually asks: how much will my monthly deposits actually grow to? Unlike a fixed deposit, where a lump sum earns interest from day one, a recurring deposit builds gradually. Each monthly instalment earns interest for a different length of time, and the compounding happens quarterly, not monthly. That asymmetry is what makes manual calculation so error-prone and what makes an RD calculator indispensable. Enter your deposit amount, the rate your bank offers, and the tenure, and the tool returns the maturity value, the interest earned, and the TDS impact.
A recurring deposit is a commitment: you pay a fixed sum every month for a set tenure, and the bank pays interest on the growing balance. The interest is compounded quarterly, which means the bank calculates interest four times a year and adds it back to your principal. Your next quarter's interest is then calculated on a slightly larger base.
An RD calculator takes three inputs — the monthly deposit, the annual interest rate, and the tenure in months — and returns the maturity amount. But the math behind that output is not straightforward. The first instalment earns interest for the entire tenure. The second earns for one month less. The last instalment earns for barely a month. A calculator sums the compound growth of every single instalment individually, then aggregates them. Doing that by hand for a five-year RD with sixty monthly deposits is impractical. That is where the tool earns its keep.
A good calculator also shows the breakdown: how much you contributed, how much the bank paid you in interest, and what portion may be subject to TDS. That breakdown matters for planning, because the interest portion is taxable, and the TDS threshold is easy to cross without realising it.
Banks and financial institutions use a standard formula to calculate RD maturity. It looks intimidating, but each part has a clear role:
Here is what each variable represents:
The denominator, 1 – (1 + i)–1/3, adjusts for the fact that deposits arrive monthly while compounding happens quarterly. Without it, the formula would overstate the maturity value.
Worked example. Suppose you deposit ₹10,000 every month for three years at 6.5% per annum. The quarterly rate i is 0.01625, and n is 12. Plugging in the numbers:
The total you deposited is ₹3,60,000. The interest earned is roughly ₹38,700. A recurring deposit calculator performs this calculation instantly and without arithmetic slip.
Using the tool is straightforward, but a few details are easy to overlook. Here is the correct sequence:
If you are comparing two tenures or two banks, run the calculation twice with the same deposit and see which combination produces the higher maturity. The difference is often larger than people expect over long tenures.
Interest rates on recurring deposits are not uniform. They vary by bank, by tenure, and by depositor category. Senior citizens typically receive an additional 0.50% per annum. The following table reflects rates available in 2026. Always verify the current rate on your bank's website before opening an account, as rates are subject to change.
| Institution | General Rate (p.a.) | Senior Citizen Rate (p.a.) | Minimum Monthly Deposit |
|---|---|---|---|
| Post Office RD | 6.70% | 6.70% | ₹100 |
| SBI | 6.25% – 6.40% | Up to 6.90% | ₹100 |
| HDFC Bank | 6.50% – 6.90% | Up to 7.20% | ₹1,000 |
| ICICI Bank | 6.50% | 7.10% | ₹500 |
| Axis Bank | Up to 6.50% | Up to 7.00% | Varies by branch |
| Kotak Mahindra | 6.50% – 7.20% | 7.00% – 7.70% | Varies by branch |
Two observations stand out. First, the post office RD rate of 6.7% is competitive with most private banks and is backed by the Government of India. Second, the rate difference between banks is not trivial over long tenures. A 0.5% difference on a ₹10,000 monthly deposit over five years can mean several thousand rupees in additional interest. An RD maturity calculator makes that comparison concrete.
The RD versus SIP debate is not about which product is universally better. It is about which one fits your time horizon, your risk tolerance, and your income pattern.
An RD offers fixed, guaranteed returns. You know at the outset what you will receive. The interest rate is locked in for the tenure, and your capital is protected up to ₹5 lakh per depositor under DICGC insurance. For short-term goals — a wedding, a down payment, an emergency fund — that predictability is valuable.
A SIP invests monthly into mutual funds. Returns are market-linked, not guaranteed. Historical equity SIP returns have ranged from 12% to 15% CAGR over ten-year periods, but that range includes both bull markets and crashes. For long-term goals such as retirement or a child's education, a SIP has historically outpaced an RD by a wide margin.
The practical rule most financial advisers follow: use an RD for goals within three to five years, and a SIP for goals beyond that. If you have an unpredictable income, a SIP is more forgiving because you can pause or reduce the instalment. An RD is less flexible — missing an instalment can attract a penalty. If you value predictability above all else, the RD calculator gives you a number you can bank on.
A fixed deposit and a recurring deposit are both bank deposits, but they serve different purposes. An FD requires a lump sum upfront and earns interest on the full amount from day one. An RD accepts monthly contributions and builds the corpus gradually.
Because an FD has the entire principal working from the start, it generally earns more interest than an RD of the same tenure and rate, assuming the total amount invested is the same. If you already have a lump sum sitting idle, an FD is the better choice. If you are saving from monthly income and do not have a lump sum, an RD is the natural fit.
The tax treatment is identical: interest from both is taxable at your slab rate, and TDS applies above the same threshold. Both are covered under DICGC insurance up to ₹5 lakh per depositor. The choice comes down to cash flow. If the money arrives in monthly instalments, an RD matches the rhythm. If it arrives in a lump, an FD puts it to work immediately.
Life is unpredictable, and you may need to withdraw your RD before it matures. Most banks allow it, but not without a cost. The standard penalty is a reduction in the applicable interest rate — typically 0.5% to 1% lower than the rate you were earning.
The exact penalty structure varies by bank and by the elapsed tenure. ICICI Bank, for example, charges a 0.50% penalty if the RD is closed within one year, and 1.00% if it is closed after one year but before five years. SBI imposes a 1% penalty on the interest earned. HDFC Bank, notably, does not permit premature withdrawal of recurring deposits at all.
Before opening an RD, read the premature withdrawal clause in your bank's terms. The penalty can turn what looked like a 6.5% return into a 5.5% return, which may change whether the RD is the right vehicle for your goal.
Interest earned on a recurring deposit is fully taxable. It is added to your total income and taxed at your applicable slab rate. The bank deducts TDS at source if your interest income from all RDs with that bank exceeds a threshold in a financial year.
The threshold is ₹40,000 for general citizens and ₹50,000 for senior citizens. If your total RD interest crosses these limits, the bank deducts TDS at 10%. If you have not submitted your PAN, the rate rises to 20%. You can submit Form 15G or 15H if your total income is below the taxable limit and you want to avoid TDS.
Many savers are surprised by the TDS deduction because they do not realise how quickly RD interest accumulates. A ₹10,000 monthly deposit at 6.5% over three years generates roughly ₹38,700 in interest — close to the threshold. A slightly larger deposit pushes it over. Using an RD calculator with TDS can help you estimate the deduction before it appears on your bank statement.
The post office recurring deposit is a government-backed scheme with a fixed five-year tenure and a minimum monthly deposit of ₹100. The interest rate is set by the Government of India and revised quarterly. As of the July–September 2026 quarter, the rate is 6.7% per annum, compounded quarterly.
The same RD calculator works for post office deposits. The only input that changes is the interest rate. Enter 6.7%, set the tenure to 60 months, and the calculator returns the maturity value. The post office RD is particularly popular for small savers because the entry barrier is low and the sovereign guarantee removes credit risk entirely.
One practical difference: post office RDs do not offer a premature withdrawal facility in the same way banks do. The scheme is designed for a fixed five-year commitment. If liquidity matters to you, a bank RD with a premature withdrawal option may be more suitable despite the slightly lower rate.
An RD calculator is an online tool that estimates the maturity amount of your recurring deposit. You enter your monthly deposit, the interest rate, and the tenure. The calculator applies the quarterly compounding formula used by banks and returns the total corpus, the interest earned, and sometimes the TDS impact.
In India, RD interest is compounded quarterly, not monthly. Deposits are made every month, but the interest is calculated and added to the balance four times a year. This is why an RD calculator uses the quarterly compounding formula rather than a simple monthly one.
The Post Office RD interest rate is 6.7% per annum as of the July–September 2026 quarter. It is fixed by the Government of India and is compounded quarterly. The minimum monthly deposit is ₹100, and the tenure is five years.
TDS at 10% is deducted if the total interest earned from all your RDs with a bank exceeds ₹40,000 in a financial year for general citizens, or ₹50,000 for senior citizens. If you have not submitted your PAN, the rate rises to 20%.
Yes, most banks allow premature withdrawal, but it comes with a penalty. The penalty is usually a 0.5% to 1% reduction in the applicable interest rate. Some banks, like HDFC Bank, do not permit premature withdrawal at all. The exact rules vary by bank.
An RD offers fixed, guaranteed returns and carries almost no risk. A SIP invests in mutual funds and offers market-linked returns, which can be higher over the long term but are not guaranteed. RDs are suitable for short-term, low-risk goals; SIPs are better for long-term wealth creation.
Yes, the same RD calculator works for post office recurring deposits. The only difference is the interest rate. The post office RD rate is 6.7% per annum, fixed for the quarter, and the tenure is always five years. Enter these values to get the correct maturity amount.
The RD maturity formula is M = R × [(1 + i)^n – 1] / (1 – (1 + i)^–1/3). Here, R is the monthly deposit, i is the annual interest rate divided by 400, and n is the number of quarters in the tenure. The denominator adjusts for the fact that deposits are made monthly while compounding happens quarterly.
In the end, an RD calculator is more than a convenience. It converts a savings habit into a predictable plan. Whether you are comparing bank rates, checking the post office scheme against a private bank, or simply confirming how much your monthly discipline will produce after five years, the tool removes the guesswork. Use the RD maturity calculator above, set the inputs to match your actual deposit and the rate your bank offers, and treat the output as what it is: a precise estimate of what your monthly savings will become, compounded quarterly and paid out on maturity.