Recurring Deposit (RD) Calculator — How RD Interest is Calculated in India

Introduction

Recurring Deposits (RD) are one of the safest savings instruments in India — offered by every bank and post office with guaranteed returns and zero market risk. Yet most people don’t know exactly how RD interest is calculated. Understanding the math helps you compare offers across banks and decide whether an RD, FD, or SIP better suits your savings goal.

⚠️ Disclaimer: Interest rates change periodically. The rates used here are for educational illustration. Verify current rates with your bank before investing.

What is a Recurring Deposit?

An RD requires you to deposit a fixed amount every month for a chosen tenure (6 months to 10 years). At maturity, you receive your total deposits plus compound interest. Key features:

• Minimum deposit: ₹100–₹1,000/month (varies by bank)
• Tenure: 6 months to 10 years
• Interest: Fixed at time of opening, compounded quarterly (most banks)
• Premature withdrawal: Allowed with penalty (usually 1% lower rate)

How RD Interest is Calculated

Most Indian banks use quarterly compounding on RD deposits. The formula:

Maturity Amount = P × n + Interest earned

For each monthly installment, interest is calculated for the remaining months using:

Interest on each installment = P × (1 + r/n)^(n×t) − P

Where:

• P = Monthly deposit
• r = Annual interest rate (as decimal)
• n = Compounding frequency per year (4 for quarterly)
• t = Time in years for that installment

A simpler approximation formula:

Total Interest ≈ P × n × (n+1) / 2 × r / 12

Where n = total months.

Worked Example: ₹5,000/month for 12 months at 7% per annum

Using quarterly compounding:

• First deposit (month 1): earns interest for 12 months
• Second deposit (month 2): earns interest for 11 months
• …
• Last deposit (month 12): earns interest for 1 month

Total Deposited: ₹5,000 × 12 = ₹60,000

Interest calculation (simplified): Average tenure = (12+11+10+…+1)/12 = 6.5 months Effective interest ≈ 60,000 × 7% × (6.5/12) ≈ ₹2,275

Maturity Amount ≈ ₹62,275

(Exact amount varies slightly with quarterly compounding method used by specific bank)

Worked Example 2: ₹10,000/month for 3 years at 7.5%

• Total months: 36
• Total deposited: ₹10,000 × 36 = ₹3,60,000
• Average tenure: (36+35+…+1)/36 = 18.5 months
• Approximate interest: ₹3,60,000 × 7.5% × (18.5/12) ≈ ₹41,625
• Maturity Amount ≈ ₹4,01,625

RD vs FD vs SIP Comparison

Feature	RD	FD	SIP
Investment	Monthly (fixed)	One-time lump sum	Monthly (fixed)
Returns	Fixed (guaranteed)	Fixed (guaranteed)	Market-linked (variable)
Risk	Zero	Zero	Market risk
Typical return	6.5–7.5% p.a.	6.5–7.5% p.a.	10–15% p.a. (long term avg)
Lock-in	Until maturity	Until maturity	None (open-ended)
Tax on returns	Interest taxable	Interest taxable	LTCG after 1 year
Best for	Short-term goals	Parking surplus cash	Long-term wealth
Minimum	₹100/month	₹1,000+	₹500/month
Premature exit	Penalty (1% less)	Penalty (0.5-1% less)	Exit load (1% in year 1)

RD Interest Rates — Major Banks (Illustrative)

Bank	1 Year	2 Years	3 Years
SBI	6.80%	7.00%	7.00%
HDFC	7.00%	7.25%	7.25%
ICICI	6.90%	7.10%	7.10%
Post Office	6.70%	6.70%	6.70%

(Rates are illustrative — verify with bank for current rates)

Tax on RD Interest

• RD interest is fully taxable as “Income from Other Sources”
• TDS (Tax Deducted at Source): Banks deduct 10% TDS if total interest across all deposits exceeds ₹40,000/year (₹50,000 for senior citizens)
• Submit Form 15G/15H if your total income is below taxable limit to avoid TDS

When to Choose RD

Best for:

• Building emergency fund (6-12 month RD)
• Saving for a specific short-term goal (vacation, gadget purchase)
• People who cannot invest lump sum but can save monthly
• Risk-averse investors who want guaranteed returns

Not ideal for:

• Long-term wealth creation (SIP in equity funds gives better inflation-adjusted returns)
• High-income individuals (interest is fully taxable)

Frequently Asked Questions

What is the minimum RD amount in most banks?

Most banks allow RD starting from ₹100-₹1,000 per month. Post Office RDs start at ₹100. Private banks may have higher minimums (₹500-₹1,000).

Can I break my RD before maturity?

Yes, but you’ll receive interest at a reduced rate (typically 1% less than the contracted rate). Some banks also charge a penalty fee. The exact terms vary by bank.

Is RD better than a savings account?

For money you won’t need for 6+ months, yes. RD rates (6.5-7.5%) are higher than savings account rates (2.5-4%). But savings accounts offer immediate liquidity.

How is RD different from SIP?

RD gives guaranteed fixed returns with zero risk. SIP invests in market-linked mutual funds with variable returns and market risk. Over 10+ years, SIP typically outperforms RD significantly.

Do I get 80C tax deduction on RD?

No. Regular RD does not qualify for Section 80C deduction. However, a 5-year Tax Saving FD (not RD) does qualify for 80C up to ₹1.5 lakh.

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