Twelve Deposits, Twelve Different Durations
A recurring deposit looks like a savings account with a fixed rate. Deposit the same amount every month, get the stated interest, collect the maturity amount.
The mechanism is different in a way that matters for understanding your return.
Each monthly instalment is effectively its own small deposit, earning interest from the day it's credited until the RD matures. Your first instalment in a 12-month RD earns interest for 12 months. Your last one earns interest for one month.
The rate applies to every instalment. The duration doesn't.
What This Does to Your Effective Return
Take a 12-month RD at 7%, depositing ₹5,000 monthly. Total deposited: ₹60,000.
If ₹60,000 earned 7% for a full year, you'd get ₹4,200 in interest. You won't — because the money wasn't there for a full year.
The average instalment is in the account for roughly half the term. So the interest earned is closer to what ₹60,000 would earn over about six and a half months at 7%.
The effective return on the total amount deposited is roughly half the nominal rate, for any RD. This isn't a hidden charge or a misleading rate — it's arithmetic. The 7% is genuinely applied, just to money that arrived progressively.
This is also why comparing an RD's total interest against an FD's total interest on the same amount is misleading. In an FD, the full principal works for the full term. In an RD, it doesn't exist yet at the start.
How Banks Actually Calculate It
Most banks compound RD interest quarterly, using a formula that treats each instalment separately:
M = Σ P × (1 + r/4)^(4n/12)
Where P is the monthly instalment, r is the annual rate as a decimal, and n is the number of months that instalment remains invested.
In practice you don't compute this by hand. The RD Calculator does it:
- Enter your monthly deposit amount.
- Enter the annual interest rate.
- Enter the tenure.
- Read the maturity amount and total interest.
Verify against your bank's figure. Small differences are normal and come from:
- Compounding frequency. Quarterly is standard, but not universal.
- Day-count convention. Some banks calculate on exact days, others on completed months.
- Rounding. Applied at different points by different institutions.
- Credit date. Whether an instalment counts from the deposit date or the start of the month.
A discrepancy of a few rupees is rounding. A discrepancy of several hundred means a different assumption somewhere, and it's worth asking.
The Numbers That Change the Outcome
Tenure has an outsized effect
Interest compounds on a growing balance, so longer tenures don't just add proportionally — they accelerate.
Comparing ₹5,000 monthly at 7%:
| Tenure | Deposited | Approximate interest |
|---|---|---|
| 1 year | ₹60,000 | ~₹2,300 |
| 3 years | ₹1,80,000 | ~₹20,600 |
| 5 years | ₹3,00,000 | ~₹59,500 |
Five times the tenure produces far more than five times the interest, because later years earn on a much larger accumulated balance.
Figures are illustrative — actual returns depend on your bank's exact compounding method and prevailing rates.
Rate differences compound
Half a percentage point looks trivial and isn't, over a long tenure. Run the calculator at your bank's rate and at a competitor's before committing to a five-year RD.
Missed instalments carry penalties
Most banks charge a penalty for missed or late instalments, and some close the RD after a specified number of consecutive misses, converting it to a lower-rate deposit.
This is worth knowing before setting an instalment amount. An amount you'll definitely maintain beats an ambitious one you might miss. The penalty structure means consistency matters more than size.
Premature Withdrawal
RDs are contractual. Breaking one early typically means:
- Interest recalculated at the rate applicable to the period actually completed, not the contracted rate
- A penalty deduction on top, often 0.5% to 1%
- Sometimes a minimum lock-in period before withdrawal is permitted at all
The recalculation is the larger cost. A five-year RD broken at two years may be repaid at the two-year rate, which is generally lower — so you lose both the rate advantage and pay a penalty.
Practical implication: don't put money in an RD that you might need. That's what a savings account or liquid fund is for. An RD is for money with a defined purpose and a defined timeline.
Tax on RD Interest
In India, RD interest is fully taxable as income from other sources, added to your total income and taxed at your slab rate.
The effect on real returns is substantial:
Nominal rate: 7.0%
At 20% slab: 5.6% after tax
At 30% slab: 4.9% after tax
A few points follow:
TDS applies above threshold. Banks deduct tax at source when interest across your deposits with that bank exceeds the specified annual threshold. The threshold is higher for senior citizens. TDS being deducted doesn't discharge your liability — you still declare the interest and pay any balance at your slab rate.
Form 15G/15H can prevent TDS deduction if your total income is below the taxable limit. Submitting it when your income is taxable is not appropriate.
Interest is taxed on accrual in most cases, meaning you may owe tax on interest that hasn't been paid out yet. Check how your bank reports it.
Compare after-tax, not nominal. An RD at 7% pre-tax and a tax-exempt instrument at 5.5% are closer than they look, and may favour the second depending on your slab. Tax treatment varies by instrument and by jurisdiction — this is general information, and your own situation warrants advice from a qualified professional.
Where an RD Fits
Good fit:
- A defined goal within 1–5 years — a deposit, a fee payment, a planned purchase
- Building a habit of regular saving with a commitment device attached
- Money you're confident you won't need before maturity
- Anyone who wants a guaranteed nominal outcome rather than a probable one
Poor fit:
- An emergency fund. The premature withdrawal penalty defeats the purpose. Keep emergency money liquid.
- Long-horizon goals of ten years or more. Over that timeframe, inflation erodes a fixed nominal return substantially, and instruments with higher expected returns are generally more appropriate for money you won't touch.
- Money you might need. See premature withdrawal.
The inflation point deserves emphasis. A guaranteed 7% with inflation at 6% is a real return of about 1%. The capital is protected in nominal terms and barely growing in purchasing power. For short goals that's fine — you want certainty. For long goals it's a meaningful drag.
Practical Tips
Set the instalment at an amount you'll sustain, not the maximum you could manage in a good month.
Automate the debit on a date shortly after your income arrives.
Compare rates across banks before opening. Rates vary, and a long tenure magnifies the difference.
Check the senior citizen rate if applicable — most banks offer a premium.
Note the maturity date and decide in advance what happens to the money. Automatic rollover at a prevailing rate may not be what you want.
Calculate after-tax returns when comparing against other instruments.
FAQ
Why is my RD interest less than I expected? Because each instalment earns interest only from the date it was deposited. The effective return on the total deposited is roughly half the nominal rate.
How do banks calculate RD interest? Typically quarterly compounding, applied separately to each instalment for the period it remains invested.
What happens if I miss an instalment? Most banks charge a penalty, and repeated misses can result in the RD being closed and converted to a lower-rate deposit.
Can I withdraw early? Usually yes, with interest recalculated at the rate for the completed period plus a penalty. The recalculation is typically the larger cost.
Is RD interest taxable? In India, yes — fully taxable at your slab rate, with TDS applied above a threshold. Tax rules vary by jurisdiction; check your local position.
Is an RD good for an emergency fund? No. Premature withdrawal penalties conflict with the need for immediate access. Keep emergency money in a liquid account.
The Takeaway
An RD's rate is real but it applies to money that arrives a month at a time, which is why the total interest looks smaller than the headline suggests. Understanding that — plus the tax treatment and the premature withdrawal cost — is what makes it possible to compare an RD honestly against the alternatives.
Calculate your recurring deposit maturity amount free with the RD Calculator at sadiqbd.com — no sign-up, instant results. This article is general information, not financial or tax advice; consult a qualified adviser about your own situation.
