reinvestment-deposit-calculator
Reinvestment Deposit Interest Calculator: Calculate Exact Bank Maturity Values easily
When you invest in a Fixed Deposit (FD) under a Reinvestment Plan (or Cumulative Scheme), the interest earned isn’t paid out monthly or quarterly. Instead, it gets added back to your principal every quarter, earning you “interest on interest.”
However, if you’ve ever tried calculating your maturity amount using standard online compounding calculators, you might have noticed a frustrating mismatch between your bank’s advice slip and online results.
Why Standard FD Calculators Give You the Wrong Numbers
Most general FD calculators calculate tenure using decimal years (for example, converting 5 years into 1,827 days and dividing by 365 to get 5.005479 years). While mathematically sound, that is not how Indian banks calculate interest!
In Indian banking, reinvestment deposits and premature closure payments are calculated following strict Indian Banks’ Association (IBA) and RBI-aligned guidelines:
- Completed Quarters: Interest is compounded quarterly for every full quarter or year the deposit has run.
- Broken Period Days: Any remaining days after the last completed quarter earn Simple Interest calculated on the newly compounded amount.
Because regular calculators treat every day as compounded, they often overestimate or underestimate your actual maturity payout—sometimes by hundreds or thousands of rupees!
How Our Calculator Helps You Countercheck Your Bank
We built this Reinvestment Deposit Interest Calculator to bridge that gap and give you 100% bank-accurate calculations.
Whether you are planning a new cumulative FD or verifying a maturity advice slip received from Public or Private sector banks (like SBI, HDFC, ICICI, PNB, or Canara Bank), this tool shows you the exact arithmetic behind your returns.
Key Benefits for Depositors:
- 100% Indian Banking Logic: Uses the exact Completed Quarters + Broken Period Simple Interest methodology used by core banking software (CBS).
- Standard DD/MM/YYYY Format: Designed specifically for Indian users—no tricky date pickers or inverted month-day formats.
- Transparent Calculation Breakdown: See step-by-step how much interest was generated during completed quarters versus remaining days.
- Verify Premature Closures: If you need to break your FD early, input your deposit date and early closure date to cross-check the exact payout amount calculated by your bank branch.
How to Use the Calculator:
- Enter your Deposit Date and Payment / Closure Date in DD/MM/YYYY format.
- Enter the Deposit Amount (₹) and the annual Interest Rate (%).
- Select your bank’s compounding frequency (Quarterly is standard for most Indian reinvestment deposits).
- Click Calculate to reveal your exact maturity value, interest earned, and the full mathematical breakdown!
Try the tool below to verify your Fixed Deposit maturity value today!
Reinvestment Deposit Interest Calculator
Calculation Result
Principal Amount
Total Tenure Breakdown
Total Elapsed Days
Interest Amount
Total Maturity Amount
Bank Calculation Breakdown
Note: Interest is calculated per standard Indian banking practices: compound interest for completed quarters, plus simple interest on the compounded amount for any remaining broken days. Calculations do not include premature closure penalties, revised rates, or TDS deductions.
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