Flat vs Reducing Rate EMI Calculator
Flat vs Reducing Rate EMI Calculator
What is a "flat rate" loan really costing you?
Total interest (flat basis)
₹0
True effective rate
0%
the equivalent reducing-balance rate
EMI if genuinely reducing
₹0
same headline rate, reducing balance
Extra interest from "flat"
What a genuine reducing-rate loan costs vs the flat-rate markup
A flat rate charges interest on the full original principal for the entire tenure, even though you're paying that principal down every month: EMI = (P + P×R×years) ÷ (years×12). A reducing (or "diminishing") balance rate, the standard for home and most personal loans, charges interest only on what's still outstanding, which is why its EMI on the same headline rate comes out noticeably lower. Used-car loans, gold loans, and many personal/consumer loans are quoted flat — always ask the lender directly whether a quoted rate is flat or reducing before comparing offers.
The "true effective rate" above is the reducing-balance rate that would produce the exact same EMI as your flat-rate loan — a same-basis number you can actually compare against a bank's reducing-rate offer.
Frequently asked questions
What is EMI and how is it calculated?
EMI (Equated Monthly Installment) is the fixed monthly payment that repays a loan over its tenure, made up of principal and interest combined. It's calculated from the loan amount, interest rate, and tenure using a standard amortization formula -- the same one this calculator uses, so you can see the exact monthly figure and how much of each payment goes to interest versus principal.
Does prepaying a loan actually save money?
Yes, almost always -- a prepayment reduces the outstanding principal, which reduces the interest charged on every remaining installment. The earlier in the loan you prepay, the more you save, since interest is front-loaded in most amortization schedules. Check for prepayment penalties with your lender first.
What's the difference between flat rate and reducing balance interest?
Flat-rate interest is charged on the full original loan amount for the entire tenure, even as you pay it down -- reducing-balance interest is charged only on what's still outstanding, so it falls every month as you repay. A flat rate quoted at the same percentage as a reducing-balance rate is effectively much more expensive; always confirm which method a lender is using.
Will improving my credit score lower my loan interest rate?
Usually, yes. Lenders price risk into the interest rate they offer, and a higher credit score signals lower risk, which typically qualifies you for better rates. It varies by lender and loan type, but it's one of the few loan-cost factors largely within your control before you apply.
Estimates only, not financial advice. See our Disclaimer.
