FD Calculator 2026: Fixed Deposit Maturity Online

What is a Fixed Deposit (FD) and How Does it Work?

A Fixed Deposit (FD) is a popular and extremely low-risk investment instrument offered by banking institutions, non-banking financial companies (NBFCs), and post offices across India. Under an FD arrangement, an investor deposits a lump-sum amount for a predetermined period (varying from 7 days to 10 years) at a fixed rate of interest. In return, the financial institution guarantees both the return of the principal amount and the interest earnings at maturity.

Unlike stock markets or mutual funds, FDs are completely isolated from market volatility. The interest rate remains locked throughout your tenure, regardless of changes in monetary policy or market corrections. This stability makes Fixed Deposits the bedrock of wealth preservation in India, widely utilized by risk-averse savers, senior citizens looking for regular cash streams, and individuals planning for close-term financial targets.

Fixed Deposit Interest Calculation: The Compounding Math

In India, banking institutions calculate interest on fixed deposits using quarterly compounding rules for tenures equal to or exceeding 180 days. For shorter periods (under 6 months), simple interest is usually applied.

1. Quarterly Compounding Formula (Cumulative FD)

Under a cumulative scheme, the interest earned in each quarter is added to the principal to form the base for subsequent interest calculations. The formula to calculate cumulative maturity value is:

Where:
A: Maturity Value of the Fixed Deposit
P: Principal deposit amount
r: Annual interest rate (%)
n: Tenure in years (e.g. 5 years)

Step-by-Step Mathematical Example:

Suppose you invest **₹1,00,000** in a fixed deposit yielding **7.0% per annum** for a tenure of **5 years** (which translates to 20 quarters). Let's compute the final maturity amount:

1. Calculate quarterly interest rate:
   i = 7.0 ÷ 4 = 1.75% per quarter (0.0175 in decimal format)
2. Compute total compounding quarters:
   n_quarters = 5 years × 4 = 20 compounding periods
3. Apply compounding factor:
   Factor = (1 + 0.0175)^20 = (1.0175)^20 ≈ 1.414778
4. Calculate Maturity Value (A):
   A = 1,00,00,000 × 1.414778 ≈ ₹1,41,478

Through this quarterly compounding mechanism, your ₹1,00,000 grows to **₹1,41,478**, yielding **₹41,478** in interest returns over the 5-year tenure.

Cumulative vs. Non-Cumulative Fixed Deposits

When configuring an FD, banks allow you to choose between cumulative and non-cumulative interest payment plans:

• Cumulative Fixed Deposits: The interest earned is reinvested and paid in one lump sum at maturity. This plan leverages the full power of compounding and is ideal for wealth accumulation goals where immediate cash flow is not required.
• Non-Cumulative Fixed Deposits: Interest is paid out regularly at fixed intervals—monthly, quarterly, half-yearly, or annually. The principal amount is repaid at the end of the tenure. This plan does not benefit from compounding and is preferred by retirees and monthly budgeters looking for regular, steady income streams.

Latest Bank Fixed Deposit Rates 2026

Interest rates on fixed deposits vary across financial institutions based on liquidity requirements, credit ratings, and central repo rate updates. In 2026, most top scheduled banks offer interest rates between **6.50% and 7.50% p.a.** for general citizens, and senior citizens receive an additional markup of **0.50% p.a.** (reaching up to **8.00%**). Below is an indicative overview of FD rates in India:

Note: Interest rates are subject to change. Please verify the active rates directly on the respective bank's official portal prior to booking.

Tax Rules and TDS Implications on Fixed Deposits (2026)

FD interest earnings are fully taxable in India under the head "Income from Other Sources". It is a common misconception that FD interest is tax-free because payouts only occur at maturity. Here is how tax is calculated and collected:

• Tax Slab Addition: The total interest accrued on your FD in a financial year is added directly to your gross salary or total income and taxed at your prevailing personal income tax slab rate (5%, 10%, 15%, 20%, or 30%).
• TDS Thresholds (Section 194A): Banks are statutorily required to deduct **TDS at 10%** if the total interest income across your deposits (FDs + RDs) in a bank branch exceeds **₹40,000** in a financial year (the limit is **₹50,000** for Senior Citizens). If you have not updated your PAN with the bank, the TDS deduction rate rises to **20%**.
• Form 15G and Form 15H: If your total annual taxable income is below the taxable threshold (e.g. ₹7,00,000 under the default New Tax Regime), you can submit Form 15G (Form 15H for senior citizens) to your bank at the start of the fiscal year to prevent TDS deduction.

Is Your Fixed Deposit Safe? DICGC Deposit Insurance Scheme

One of the main reasons investors prefer FDs over market assets is the safety shield. Every depositor in a registered commercial, small finance, or co-operative bank in India is insured by the **Deposit Insurance and Credit Guarantee Corporation (DICGC)**, a wholly-owned subsidiary of the Reserve Bank of India (RBI).

Under this scheme, if a bank defaults or goes into liquidation, the DICGC is legally liable to pay depositors a maximum amount of **₹5,000,000 (₹5 Lakhs)** inclusive of both the principal deposit and the interest accrued. This limit applies per depositor per bank, meaning you can distribute your deposits across multiple banks (for instance, ₹4 Lakhs in Bank A and ₹4 Lakhs in Bank B) to keep your entire capital 100% insured under the statutory guidelines.