Flat vs Reducing Rate: The 8% Car Loan That’s Actually 14%

The showroom manager slid the paper across to Ravi: “Sir, only 8% interest.” Ravi can do math — 8% of ₹6 lakh is ₹48,000 a year, seems fair for a car loan. What the paper did not say: this was a flat rate, charged on the full ₹6 lakh for all five years — including the lakhs he would have already repaid. The real rate on Ravi’s loan is 14.13%. He negotiated the car’s price for an hour and the loan’s price not at all, and the dealership counted on exactly that.

The machinery: interest on money you’ve returned

A reducing-balance loan — every bank home loan works this way — charges interest each month only on what you still owe. A flat-rate loan charges interest on the original amount till the last EMI, as if you had repaid nothing. By the final year, Ravi owes barely a lakh but pays interest on six. The flat number is engineered to be small and quotable; the arithmetic conversion is roughly flat × 1.8 ≈ real, and it is never printed on the brochure.

The part that is actually against the rules

RBI’s fair-practice guidance requires lenders to disclose the effective annualised, reducing-balance rate. Car dealers, consumer-durable counters and many NBFCs quote the flat number anyway, because the fine print technically exists somewhere and nobody at a showroom on a Sunday reads annexures. The grey practice is not the flat rate itself — it is quoting it naked, next to a bank’s reducing rate, knowing you will compare the two as if they were the same species.

Run your own numbers, right here

How to protect yourself

One question, asked while looking them in the eye: “Is that flat or reducing?” If the answer is flat — or a sudden interest in offering you a free seat cover — multiply the rate by 1.8 in your head and compare that against a bank’s quote. Better: run the calculator above in the showroom; it solves the true reducing-equivalent rate from any flat quote in seconds. The EMI being “affordable” is not the test. The rate is the test.

Why do dealers push their own financing so hard?

Commission from the financier, often 1–3% of the loan — sometimes more than the margin on the car. The discount they “give” you on the car frequently comes back to them through the loan.

Is a flat rate ever okay?

If the flat quote × 1.8 still beats every reducing-balance offer you can get — rare, but possible — then the structure does not matter, only the true cost does. Compute first, sign second.

Disclaimer: This article is for general information only and is not financial or tax advice. Consult a qualified advisor before making investment or tax decisions.