Guide

A flat-rate loan and a reducing-balance loan are different machines

Written by the Loankira editorial desk — Malaysian finance writers, every figure checked against BNM, LHDN, KWSP or PERKESO · Last reviewed: 13 October 2026

Flat rate charges interest on the original principal for the whole term; reducing balance charges it only on what is still owed, so the same headline percentage costs far more in the first case.

Car loans quote flat; home loans reduce. The gap between the two numbers is where Malaysian borrowers quietly lose thousands.

Two rates with the same number are not the same loan

On a flat rate, interest for every year is charged on the original amount you borrowed, no matter how much you have already paid back. On a reducing balance (the amortising method used for home loans and credit cards), interest each month is charged only on what is still owing, so your interest falls as you repay. A RM50,000 hire-purchase loan at 3% flat over 5 years costs 50,000 × 3% × 5 = RM7,500 in interest. A reducing-balance loan at 3% p.a. over the same term costs roughly RM3,900 — less than half. Because a flat-rate loan front-loads interest, settling early returns less than most borrowers expect — the early payoff calculator puts a figure on that gap.

The quick conversion: flat × 1.8 to 2.0

A useful mental rule for typical 3–7 year tenures: the true annual cost of a flat rate is roughly 1.8 to 2.0 times the quoted number. A 3% flat rate behaves like about a 5.5–6% reducing-balance loan. The factor shrinks towards 1.8 on shorter tenures and grows on longer ones. This is why a bank's 3% flat car loan is often more expensive than a rival's 5% 'monthly rest' personal loan, and why comparing a flat quote to a reducing quote directly is a category error.

Where each one shows up

Flat rates: most car hire-purchase loans from banks and Cooperatives, some Islamic fixed-rate personal financing (the effective profit rate is disclosed alongside), furniture and electronics instalment plans. Reducing balance: housing loans, most cash personal loans from banks, credit cards, and refinancing products. Malaysian banks are required to disclose the effective profit/interest rate for flat-rate products — look for 'equivalent effective rate' in the loan disclosure, not just the headline.

Worked comparison on the same RM60,000

Loan A: 3.0% flat, 7 years → interest 60,000 × 0.03 × 7 = RM12,600; instalment ≈ (60,000+12,600)/84 ≈ RM864/month. Loan B: 5.5% p.a. reducing, 7 years → instalment ≈ RM861/month with total interest ≈ RM12,300. Nearly identical monthly cost — Loan A's '3%' and Loan B's '5.5%' are the same money. Any lender quoting only the flat number is hiding the comparison; ask for the effective rate.

The quick conversion: flat to effective without a calculator

For a 7-year flat rate, effective is roughly 1.85 times the flat number; for 5-year hire purchase it is about 1.8 to 1.9; for 3-year it is closer to 1.75. So 3.4% flat over 7 years is about 6.3% effective, and 2.9% flat over 9 years is about 5.2% effective, before fees. The multiple exists because with a flat rate you keep paying interest on money you have already returned. Use it to sanity-check any car-loan quote in your head, then confirm with the calculator.

Where flat rates are fair: short tenures and rebates

A flat rate is not a trick by default. On a 2-year personal loan the distortion is small, and some islamic hire-purchase structures quote profit rates with rebates (ibr) that behave closer to reducing balance. The unfairness appears in long-tenure deals marketed with a low flat figure while fees load the effective rate, and in settlements that pay rebate by an opaque formula. If the effective rate and the rebate method are both disclosed in writing, flat-rate quotes are perfectly comparable.

This guide is general information, not financial, tax or legal advice. Bank policies and rules change; confirm with your bank or the relevant agency.