| Overview: A cumulative fixed deposit is an investment where interest earned is reinvested with the principal amount, generating compound returns payable at maturity. Unlike regular FDs that pay periodic interest, cumulative FDs maximise growth through the power of compounding, making them ideal for long-term financial goals or retirement planning. |
Understanding Cumulative Fixed Deposits
Every Indian household faces the dilemma of where to park their hard-earned money for future needs. Fixed deposits remain one of the most popular investment choices in India, with over 45% of household savings flowing into bank deposits, according to RBI data.
When opening a fixed deposit, you’ll encounter two main types: cumulative and non-cumulative.
A cumulative fixed deposit is one where the interest earned is not paid out regularly but instead gets added back to your principal amount. This reinvested interest then earns more interest—creating a compounding effect that significantly boosts your returns over time.
How Cumulative FDs Work
Think of a cumulative fixed deposit as a snowball rolling downhill. As your snowball (principal) rolls, it picks up more snow (interest), making it bigger. This bigger snowball then collects even more snow as it continues to roll—creating an accelerating growth effect.
In practical terms, here’s what happens:
- You deposit a lump sum amount (say ₹1 lakh) for a fixed period.
- The bank calculates interest at regular intervals (monthly, quarterly, or yearly).
- Instead of paying out this interest, the bank adds it to your principal.
- In the next cycle, interest is calculated on this enhanced amount.
- This process continues until maturity, when you receive the entire amount.
| Pro Tip: The compounding frequency matters! The more frequent the compounding (monthly vs. quarterly vs. yearly), the higher your returns will be. |
Cumulative vs. Non-Cumulative Fixed Deposits
| Feature | Cumulative FD | Non-Cumulative FD |
| Interest Payout | Only at maturity | Regular intervals (monthly/quarterly/annually) |
| Ideal For | Long-term wealth creation | Regular income needs |
| Compounding Benefit | Yes | No |
| Final Maturity Amount | Higher | Lower |
| Tax Efficiency | Better (tax payable only at maturity) | Less (tax payable throughout the tenure) |
Calculating Returns on Cumulative Fixed Deposits
The magic of cumulative fixed deposits lies in compound interest. Unlike simple interest, where you earn returns only on the principal amount, compound interest generates “interest on interest.”
Sample Calculation
Let’s understand with a real-life example:
Suppose you invest ₹1 lakh in a cumulative fixed deposit at 7% p.a. for 5 years with annual compounding:
- Year 1: ₹1,00,000 + (₹1,00,000 × 7%) = ₹1,07,000
- Year 2: ₹1,07,000 + (₹1,07,000 × 7%) = ₹1,14,490
- Year 3: ₹1,14,490 + (₹1,14,490 × 7%) = ₹1,22,504
- Year 4: ₹1,22,504 + (₹1,22,504 × 7%) = ₹1,31,080
- Year 5: ₹1,31,080 + (₹1,31,080 × 7%) = ₹1,40,255
Your final maturity amount would be ₹1,40,255, giving you a total interest of ₹40,255.
For quick calculations, you can use an interest calculator to determine potential returns before investing.
Impact of Compounding Frequency
The frequency of compounding can significantly impact your returns:
| Compounding Frequency | Final Amount on ₹1 lakh at 7% for 5 years |
| Annual | ₹1,40,255 |
| Quarterly | ₹1,41,852 |
| Monthly | ₹1,42,302 |
As you can see, monthly compounding yields nearly ₹2,000 more than annual compounding over 5 years.
Benefits of Investing in Cumulative Fixed Deposits
Cumulative fixed deposits offer several advantages that make them attractive for long-term financial planning:
- Maximised Returns: The power of compounding works in your favor, especially over longer tenures.
- Disciplined Saving: Since interest isn’t paid out, it helps in building a larger corpus.
- Goal-Based Planning: Ideal for specific financial goals like education, marriage, or retirement.
- Tax Planning: TDS is deducted only upon maturity, improving cash flow.
- Loan Facility: You can take a loan against your FD (typically 75-90% of the deposit amount) in case of emergencies.

Factors to Consider Before Investing
Before opening a cumulative fixed deposit, consider these important factors:
Interest Rates
Different banks and financial institutions offer varying interest rates on fixed deposits. Currently, most banks offer rates between 5.5% to 7.5% for regular customers, with slightly higher rates for senior citizens. You must check out options from providers like Airtel Finance for competitive offerings.
Tenure Selection
The tenure you select has a significant impact on your returns. Generally, longer tenure fixed deposits offer higher interest rates. However, also consider your liquidity needs and financial goals when selecting the tenure.
Premature Withdrawal Penalties
Most banks charge a penalty (typically 0.5% to 1%) for premature withdrawal from fixed deposits. Understand these charges before investing, especially if you might need the funds before maturity.
Documentation Requirements
Opening a fixed deposit requires certain documents like identity proof, address proof, and passport-sized photographs. Keep these ready to ensure a smooth application process.
Ultimately, choosing the right fixed deposit involves more than just selecting the highest interest rate. It requires a thoughtful evaluation of all contributing factors to ensure your investment aligns perfectly with your financial blueprint.
When considering your investment options, explore Airtel Finance. They offer competitive fixed deposit rates and streamlined application processes, making your investment journey smoother and more efficient.
FAQs
1. What is the minimum investment amount for a cumulative fixed deposit?
Most banks accept a minimum investment of ₹1,000 for cumulative fixed deposits, though this can vary between financial institutions. Some premier fixed deposits may require higher minimum amounts.
2. How is tax calculated on cumulative fixed deposits?
Interest earned on fixed deposits is taxable as per your income tax slab. TDS is deducted at 10% if interest exceeds ₹40,000 per year (₹50,000 for senior citizens).
3. Can I get a loan against my cumulative fixed deposit?
Yes, most banks offer loans up to 90% of your fixed deposit value at an interest rate 1-2% higher than your FD interest rate, making it an affordable borrowing option.
4. Are cumulative fixed deposits suitable for senior citizens?
Yes, senior citizens can benefit from cumulative FDs, especially if they have other income sources. They also enjoy additional interest rates of 0.25-0.50% over regular rates.
5. What happens to my cumulative FD if I pass away during the tenure?
The nominee can either withdraw the deposit prematurely without penalty or continue the deposit for the remaining tenure as per the original terms.