INDIA-SPECIFIC BORROWING DECISIONS
Flat vs Reducing Interest Rate Calculator
Compare a flat-rate instalment scenario with a reducing-balance EMI using the same principal, stated annual rate, and term.
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Enter your values and choose Calculate. Your inputs stay on this device.
How it works
Flat interest = principal × annual rate × years. Reducing balance uses the standard EMI formula.
Assumptions and limits
A like-for-like product comparison also requires APR, fees, dates, taxes, insurance, and the lender’s actual repayment method.
About this calculator
This page shows why the same stated percentage can produce different costs when one method charges on original principal and another on outstanding balance.
What this tool helps you check
Compare total rupee cost and instalment under flat-interest and reducing-balance mathematics.
How to use it
- Review the formula and assumptions shown for this flat vs reducing interest rate calculator.
- Enter one principal, rate, and term for both mathematical methods.
- Calculate and compare total interest and monthly payment rather than rates alone.
- Use APR, fees, and the lender key fact statement for a real product comparison.
Source and update
Last reviewed: 2026-08-22
Reserve Bank of India — financial education and consumer awarenessFrequently asked questions
What does this flat vs reducing interest rate calculator calculate?
This page shows why the same stated percentage can produce different costs when one method charges on original principal and another on outstanding balance.
How should I interpret the result?
Compare total interest and monthly payment rather than rates alone. The result changes whenever an input or assumption changes.
Is the result official or guaranteed?
Use APR, fees, and the lender key fact statement for a real product comparison.
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