Cumulative vs Non-Cumulative FD: Which Earns More?
Same bank. Same rate. Same tenure. Same principal. But a cumulative FD will always earn more than a non-cumulative one. The math is straightforward — yet many investors pick the wrong type because they don't see the numbers clearly.
Let's fix that.
The Core Difference
**Cumulative FD**: Interest is calculated quarterly but not paid out. It's added back to the principal, and the next quarter's interest is calculated on this larger amount. You receive the entire principal plus accumulated interest at maturity. This is compounding in action.
**Non-Cumulative FD**: Interest is calculated and paid out at regular intervals — monthly, quarterly, half-yearly, or annually. The principal remains unchanged throughout. No compounding happens because the interest leaves the deposit.
Same Investment, Different Outcomes
Principal: ₹10,00,000
Rate: 7.00% per annum
Tenure: 5 years
Compounding: Quarterly
**Cumulative FD:**
- Interest compounds quarterly at 1.75% per quarter
- Maturity value: ₹14,14,782
- Total interest earned: ₹4,14,782
**Non-Cumulative FD (quarterly payout):**
- Quarterly interest: ₹17,500 (simple interest on ₹10,00,000)
- Total payouts over 5 years: 20 quarters x ₹17,500 = ₹3,50,000
- You also get back your ₹10,00,000 principal
**The gap: ₹64,782**
That's 18.5% more interest from the cumulative FD. On ₹10,00,000 over just 5 years. The difference grows dramatically with larger amounts and longer tenures.
Why the Gap Exists
Quarter 1 of the cumulative FD: Interest = ₹17,500. Added to principal.
Quarter 2: Interest is calculated on ₹10,17,500 = ₹17,806. That's ₹306 more.
Quarter 3: Interest on ₹10,35,306 = ₹18,118.
Each quarter, you earn interest on a slightly larger base. By year 5, your effective principal has grown substantially, and the quarterly interest calculation reflects that. The non-cumulative FD never gets this benefit — it always calculates interest on the original ₹10,00,000.
When to Choose Cumulative FD
- You don't need regular income from this investment
- You're building a corpus for a future goal (child's education, house down payment, retirement)
- You want maximum returns from your FD
- You're young and working with a steady salary income
Cumulative FDs are the default choice for anyone who can afford to wait until maturity.
When Non-Cumulative FD Makes Sense
- You're retired and need monthly or quarterly income
- This FD specifically serves as an income replacement
- You have no other regular income source
- You prefer to receive interest and reinvest it yourself in other instruments
A retiree with ₹30,00,000 in a non-cumulative FD at 7.50% (senior citizen rate) earns ₹56,250 per quarter — that's ₹18,750/month in predictable income. This cash flow is the entire point.
Tax Angle — An Important Nuance
Here's something many investors miss: TDS is deducted annually on cumulative FDs based on accrued interest, even though you haven't received the money. The bank calculates how much interest accrued that year and deducts TDS on it.
This means you pay tax on money you haven't yet received. With non-cumulative FDs, TDS aligns with actual payouts, which can be easier to manage from a cash flow perspective.
The Verdict
Choose cumulative for maximum wealth creation. Choose non-cumulative for regular income needs. There's no scenario where a non-cumulative FD earns more total interest — the math doesn't allow it.
Run both scenarios with your own numbers on our [FD Calculator](/) to see the exact difference for your situation.