The labels sound similar, but the math is not
A flat rate is charged as though the original principal stays unchanged for the whole term. A reducing-balance loan recalculates interest as the balance falls. That difference makes the same headline percentage behave very differently.
Why flat-rate loans look deceptively cheap
Because the interest is presented on the original principal, the headline percentage often looks low. Borrowers see a small number, assume it is comparable to an EIR or reducing-balance rate, and then underestimate the real cost.
What to compare instead
- The monthly installment for your actual amount and term.
- The total interest over the full life of the loan.
- The fee layer on top of the interest math.
The safest mindset
Treat the headline rate as a clue, not the verdict. The real decision should be anchored on repayment burden and all-in cost, especially when different markets publish different pricing styles.