EMI Reducing Balance Calculator
Calculate your EMI on the standard reducing balance method — the method almost every bank actually uses — and see it side by side against the flat rate method for the exact same loan amount, rate and tenure. The gap between the two is bigger than most borrowers expect.
Reducing Balance vs Flat Rate
Enter your loan amount, the stated annual interest rate, and the tenure. See the EMI, total interest and total payment calculated both ways — plus the equivalent reducing balance rate a flat rate loan actually works out to.
Reducing Balance vs Flat Rate — What's Actually Different
Both methods start from the same three numbers — principal, rate, tenure — but they treat the loan balance completely differently:
- Reducing balance charges interest each month only on what's still outstanding. As you repay, the balance shrinks, so each month's interest charge shrinks with it — even though your EMI itself stays fixed.
- Flat rate charges interest on the full original loan amount, every single month, for the entire tenure — even in the last month, when you've nearly finished repaying and barely owe anything.
This is why a loan advertised at, say, "10% flat" is not the same deal as a loan at "10% reducing balance" — the flat rate version always works out more expensive, because it never lets the interest base fall as you pay it down. Lenders sometimes advertise flat rates because the headline percentage looks lower or more attractive, even though the real cost is higher.
Worked Example
Loan amount (P): ₹500,000 Rate: 10% annual Tenure: 60 months (5 years)
Reducing balance EMI ≈ ₹10,624/month → total interest ≈ ₹1,37,440
Flat rate EMI ≈ ₹12,500/month → total interest ≈ ₹2,50,000
Same stated 10% rate, same amount, same tenure — but the flat rate version costs roughly ₹1,876 more per month and about ₹1,12,589 more in total interest. Worked out in reverse, that flat 10% loan behaves like an ~17.3% reducing balance loan — which is the number that actually matters when comparing it to a normal bank loan quote.
Frequently Asked Questions
What is the reducing balance method?
The reducing balance method calculates interest each month only on the loan balance still outstanding — not on the original loan amount. As you repay principal, the balance shrinks, so the interest portion of each EMI shrinks too, even though the EMI itself stays fixed. Almost all bank loans (home, car, personal) use this method.
What is the flat rate method?
The flat rate method calculates interest on the full original loan amount for the entire tenure, regardless of how much principal you've already repaid. Because interest never shrinks over time under this method, a flat rate loan always costs more than a reducing balance loan quoted at the identical stated rate.
Why does the same interest rate cost more under flat rate?
Under reducing balance, interest is charged on a shrinking balance every month, so the effective interest paid over the loan is lower. Under flat rate, interest is charged on the full original amount for every single month of the tenure, even in the final month when you've nearly finished repaying — so you're paying interest on money you no longer technically owe.
How do I compare a flat rate loan offer to a reducing balance loan offer fairly?
Convert the flat rate into its equivalent reducing balance rate — the reducing balance rate that would produce the same EMI. This calculator does that conversion automatically, so you can compare two loan offers quoted under different methods on a like-for-like basis instead of comparing their stated percentages directly.