Basis of Interest Calculation
- Interest on fixed deposits is calculated on the principal amount for a fixed tenure.
- Banks use either simple interest or compound interest, depending on the deposit type.
- The applicable interest rate is determined at the time of booking the FD.
- Interest is computed for the full tenure and remains unchanged throughout.
- The final maturity amount includes both the principal and accrued interest.
Cumulative vs Non-Cumulative FDs
- In cumulative FDs, interest is added to the principal and compounded quarterly.
- The total interest is paid only at maturity, offering higher returns.
- In non-cumulative FDs, interest is paid at regular intervals (monthly, quarterly, etc.).
- These are preferred by individuals seeking periodic income.
- The payout frequency affects the total interest earned over time.
Tenure and Rate Influence
- Longer tenures generally yield higher interest compared to shorter durations.
- However, some banks offer the best rates at specific mid-term durations.
- Interest rates are fixed and not impacted by market fluctuations during the deposit period.
- Tenure and rate together define the maturity value.
- Most banks offer rate slabs based on time frames like 1 year, 3 years, or 5 years.
Senior Citizen and Special Rates
- Senior citizens earn an additional interest margin, typically 0.25% to 0.75% more.
- This bonus applies across all standard tenures.
- Some banks offer exclusive FD schemes with higher interest for seniors.
- Special promotional FDs also feature limited-time rate offers for all depositors.
- The benefit is reflected directly in the maturity amount.
Compounding and Effective Yield
- Interest is usually compounded quarterly, increasing the effective return.
- The Effective Yield is slightly higher than the nominal rate due to compounding.
- For example, a 7.00% annual rate compounded quarterly may yield 7.19%.
- Banks display both the interest rate and maturity amount for transparency.
- Choosing compounding over periodic payouts boosts total return at maturity.
