How to compare two personal loan offers (the interest rate alone doesn't tell you enough)
TL;DR: Compare the total cost over the full tenure — EMI × number of months, plus processing fees and any prepayment penalty — not just the advertised interest rate. A lower rate with a high processing fee or restrictive prepayment terms can end up costing more than a slightly higher rate without those charges.
Four things to check beyond the headline rate
- Reducing balance vs flat rate — a "flat rate" loan calculates interest on the original principal for the entire tenure, which is effectively a much higher real rate than the same number on a reducing-balance basis. Always confirm which method is used before comparing two rates directly.
- Processing fee — often 1-3% of the loan amount upfront, which effectively increases your real cost, especially on shorter-tenure loans where it's a bigger share of total interest.
- Prepayment/foreclosure charges — if you might want to pay off the loan early, a lender with no or low prepayment penalty can save significantly more than a marginally lower rate would, if you actually do prepay.
- Whether the rate is fixed or subject to change — some personal loans have rates that can be revised; know which you're agreeing to.
A worked example of why the "lower rate" can lose
Loan A: 12% reducing-balance rate, 1% processing fee, no prepayment penalty. Loan B: 11.5% reducing-balance rate, 3% processing fee, 2% prepayment penalty. On a ₹5,00,000, 3-year loan, Loan B's lower rate saves relatively little in interest but its higher processing fee alone can offset most of that saving — and if you plan to prepay early, its penalty can make it the more expensive option overall despite the lower headline rate.
Use the scenario comparison to check your specific numbers
Our calculators' built-in scenario comparison shows a conservative/base/optimistic range for a single rate — for comparing two entirely different loan offers side by side, run each one's real terms (rate, fees, tenure) through the calculator separately and compare the total cost, not just the monthly EMI.
Frequently asked questions
How do I know if a personal loan interest rate is actually good?
Compare the total cost over the full tenure — including processing fees and any prepayment penalty — not just the advertised annual rate, and confirm whether the rate is calculated on a reducing balance or a flat basis, since a flat-rate loan is effectively much more expensive than the same headline number on a reducing balance.
What is the difference between flat rate and reducing balance interest?
A flat-rate loan calculates interest on the full original principal for the entire tenure, even as you pay it down, which makes its effective rate substantially higher than the same headline percentage on a reducing-balance loan, where interest is calculated only on the outstanding balance each period.
Should I choose the loan with the lowest interest rate?
Not automatically — a lower rate with a high processing fee or a restrictive prepayment penalty can end up costing more in total than a slightly higher rate without those charges, especially if you plan to pay off the loan early.