Mortgage Rates: Fixed vs Floating vs Tiered, and When to Pick Which
Tim Moneysaurus ยท 2026-07-24
About to take out a KPR (home loan / mortgage) and running into so many interest rate numbers that your head spins? Relax, you are not alone. The trap is usually not the number itself, but how that number behaves from year to year. A KPR advertised at "starting from 4.50%" can end up far more expensive than one that looks "just ordinary", depending on what happens after the early years. So before you fall for the smallest number on the brochure, get to know the three forms of KPR interest and how each one treats your monthly payment.
The situation right now
In Indonesia, almost every non-subsidized KPR uses a combination, namely a fixed rate at the start, then floating for the rest of the loan term. OJK spells this pattern out plainly, that is a KPR with a fixed interest rate for the first two years, and then the following period uses a floating rate (OJK Sikapi, 20 July 2026). This means the sweet number you see in the ad usually only applies for a short while. That is why choosing a KPR is not about hunting for the smallest rate in the first year, but about understanding the rate structure and the total cost until the loan is paid off.
Three types of rates, three different characters
Fixed rate. As the name says, this rate does not change. According to OJK, a fixed rate does not change until maturity or the end of the loan term, and it is often used on subsidized home loans and vehicle loans (OJK Sikapi, 20 July 2026). The upside is clear, namely your payment is certain and easy to budget. But be careful, on a commercial KPR "fixed" usually only applies for a promo period, not until the loan is paid off.
Floating rate. This is the rate that, as OJK puts it, always changes following the market interest rate; if the market rate rises then the loan rate rises too, and vice versa (OJK Sikapi, 20 July 2026). Banks tie it to market conditions and Bank Indonesia policy. BTN gives a simple illustration, namely when the BI rate is 7% a bank's floating rate could be 8%, and if the BI rate falls to 6% the bank adjusts the KPR down to 7% (BTN, 20 July 2026). The consequence is that the installment amount you have to pay can rise when the market rate rises (BTN, 20 July 2026).
Tiered rate (fix berjenjang). This is the middle path. Bank Sinarmas defines it as a home loan with an interest rate that is fixed for a certain period, but can change in stages according to the loan agreement's periods (Bank Sinarmas, 20 July 2026). So the rate is fixed, but it rises on schedule, for example lower in the early years then rising to a certain level in the following years. The difference from floating is that a tiered rate gives you payment certainty at the start of the loan with increases that are already planned, whereas floating fluctuates following market conditions and Bank Indonesia's benchmark rate policy (Bank Sinarmas, 20 July 2026).
A quick comparison
| Aspect | Fixed | Tiered | Floating |
|---|---|---|---|
| How the rate moves | Stays put during its period | Rises on schedule per period | Moves up and down with the market |
| Payment certainty | Most certain | Certain, but rises in stages | Least certain |
| Risk of a sudden jump | Low during the fixed period | Low, because it is scheduled | High when the benchmark rate rises |
| Best for | Tight budget, needs certainty | Wants early certainty and is ready for increases | Has a buffer and tolerance for risk |
Keep in mind, on a commercial KPR both fixed and tiered almost always end up floating too once the initial period is over. So this table is about their character in the early phase, not a promise for the life of the loan.
When to pick which
The key is matching the rate structure to your situation and time horizon, not chasing the smallest number.
If your income is relatively steady and you want to sleep soundly without worrying about your payment changing, look for a long fixed or tiered period, then pay close attention to what the rate becomes once that period ends. If you plan to pay off or sell the house within a few years, an attractive fixed period can make sense because you exit before entering the floating phase. If you have a cash reserve and are ready to face a payment that can rise, floating is not always bad, especially when the rate trend is heading down.
One thing worth stressing, fixed and tiered do not mean risk-free forever. Both merely delay the moment when the rate starts moving. So the question is not "safe or not", but "when does the rate start to change, and will I be ready when that time comes". What is truly locked until the loan is paid off usually only exists in subsidized KPR, not commercial KPR.
Whatever you choose, test it first with a payment simulation at a rate higher than the promo number. If in that scenario the payment already leaves you gasping for breath, it means you cannot truly afford it yet, even if the first-year number feels light. After the akad (signing/closing), recording your payment every month also helps you know when the rate changes and how big the impact is. You can record and check whether your payment is still safe via WhatsApp to Moneysaurus, so a rate increase does not catch you off guard mid-month.
The one thing to take home
The smallest rate on the brochure almost never tells the whole story. What determines how heavy a KPR is is its structure, namely fixed, tiered, or floating, and how much you pay in total until the loan is settled, not the teaser rate in the first year. Understand first how the rate moves after the promo period, match it to your time horizon and your capacity, then test it in a higher-rate scenario. If it passes there, only then is your choice truly safe.
Data sources: OJK Sikapi (types of bank interest rates), BTN (floating KPR rates), and Bank Sinarmas (tiered fixed KPR vs floating).