What is the difference between flat and reducing interest rate?

A flat rate charges interest on the full loan amount for the entire tenure, regardless of how much you've repaid. A reducing-balance rate charges interest only on the outstanding balance, which falls each month. For the same headline rate, a flat loan costs far more.

How do I convert a flat rate to a reducing rate?

There's no single multiplier, but a flat rate is roughly 1.8 times the equivalent reducing rate for typical tenures. This calculator finds the exact reducing rate that produces the same EMI as the flat loan, so you can compare offers fairly.

Why do lenders quote flat rates?

Because a flat rate looks lower. A '10% flat' loan can be close to an 18% reducing-balance loan, so the flat figure makes the loan seem cheaper than it is. Always compare on the reducing-balance (effective) rate.

Flat vs Reducing Rate Calculator (India)

Flat vs Reducing Rate Calculator

A "flat" interest rate looks low but costs far more than it sounds. Enter a loan amount, the quoted flat rate and the tenure — this tool shows the equivalent reducing-balance rate, so you can see the real cost and compare offers honestly.

Side-by-side comparison

Flat rate

Reducing rate

How it's calculated

On a flat rate, interest is charged on the full loan for the whole tenure: interest = loan × rate × years, and the EMI is simply the total divided by the number of months. On a reducing-balance rate, interest is charged only on what's still owed, so it falls over time. To make them comparable, this tool finds the reducing rate that produces the same EMI as the flat loan — that's the flat loan's true, effective rate.

A flat rate is roughly 1.8× the equivalent reducing rate for common tenures — so a 10% flat loan is closer to 18% reducing. Banks use reducing balance; informal lenders and some dealers quote flat.

Frequently asked questions

Which should I choose?

Always prefer a reducing-balance loan at the same or similar rate. If only a flat rate is offered, use its effective reducing rate to compare with a bank's reducing-rate loan.

Where are flat rates common?

Two-wheeler dealer finance, some consumer-durable loans and informal lending often quote flat. Bank home, car and personal loans use reducing balance.

Does tenure change the gap?

Yes — the longer the tenure, the wider the gap between flat and reducing, because more of the loan is repaid while flat interest keeps charging on the full amount.

Flat vs Reducing Rate Calculator

Loan details

Side-by-side comparison

How it's calculated

Frequently asked questions