KPR Fixed vs Floating After BI Rate Hits 5.75%: How Long to Lock Your Rate?

On June 18, 2026, Bank Indonesia raised the BI Rate by another 25 basis points to 5.75%. It was the second hike in two weeks, after lifting it to 5.50% on June 9. The reason was to keep the rupiah stable and hold inflation within target. For some people this is just an economic headline that passes by. But for a home buyer weighing a mortgage, this one small number can decide a difference of hundreds of thousands of rupiah in monthly payments over many years.

The reason is mechanical. The benchmark rate is what banks lean on when they set their SBDK (Suku Bunga Dasar Kredit, the prime lending rate), the figure used to price your mortgage. When the benchmark climbs, lending rates tend to creep up too. Right at this point, the choice between a fixed rate and a floating rate becomes a serious decision, not just a box you tick on a bank form.

What's the Difference Between Fixed and Floating?

Almost every mortgage in Indonesia isn't "pure fixed" or "pure floating." It's a blend, usually called fixed then floating. That means the rate is locked at a set figure during the fixed period (say the first 1, 3, 5, or 10 years), and once that period ends, the rate shifts to follow the market benchmark (floating) for the rest of the term.

During the fixed period, your installment doesn't budge even if the BI Rate rises or falls. Once you enter the floating period, your installment goes wherever rates go. That's the heart of the decision: the fixed period is like an umbrella. The question is whether you want an umbrella that covers just 1 year, or one that covers 5 to 10.

Why is a longer fixed term safer in a rising-rate cycle?

It comes down to direction. If the benchmark rate is on an upward trend, and these back-to-back moves to 5.75% suggest BI may not be done, then locking your rate for longer means locking in certainty for longer. While the neighbour's installment climbs every time the benchmark moves, yours stays the same as long as you're still in the fixed period. That makes household cashflow far easier to manage.

On the flip side, if you take a fixed period of only 1 to 2 years, you slip into the floating zone quickly, right when market rates are at their highest. That's the scenario that catches a lot of people off guard in year three.

Watch Out for the "Teaser Rate" Trap

One thing often throws buyers off in their calculations: the teaser rate. Some banks offer a fixed rate that looks very cheap, say a 2-year fix at a really low number. It looks tempting. But the cheap period is short, and once it passes, the rate jumps straight to a much higher floating one.

So don't just look at the first-year rate. Look at how long that figure holds, and roughly what the floating rate will be afterward.

How Much Does a Rate Hike Actually Hit Your Installment?

Here's how it lands in real money. On a loan of around Rp 1 billion, every rate rise of about 0.25% can add roughly Rp 150,000 to Rp 200,000 to the monthly installment. If the rate rises 0.5%, the add-on can be Rp 300,000 to Rp 400,000 a month. It looks small per month, but multiply by 12 months, then by several years, and the number gets big.

At the market level the effect shows too. Industry estimates suggest that a mortgage-rate rise of just 1 to 2% can shave 4 to 5% off the mortgage market, as some would-be buyers choose to wait. That's why someone who has locked in a long fixed rate during a time like this sits relatively at ease.

Fixed vs Floating: Which One Fits You?

To make the comparison easy, here it is in a single table.

How Long Should You Lock the Rate?

There's no single magic number that fits everyone, because this depends on your plan. But there's a way to think it through. Try answering these questions before you sign.

1. How long do you intend to hold this mortgage? If the plan is a calm 10 to 20-year repayment, take the longest fixed period the bank offers. A 5 or 10-year fix protects you far more than a 1 to 2-year fix.
2. Is there a plan to pay off early or take over? If yes, and you're truly confident, a cheap floating teaser up front can make sense. But be honest with yourself, because early-payoff plans often don't pan out.
3. How well can your cashflow absorb a shock? If the monthly budget is already tight, an installment jump after the floating period kicks in can hurt. A long fix buys that peace of mind.
4. Compare the total, not just the first year. Ask the bank or marketing to run a full simulation: the installment during the fixed period, then the estimated installment once it floats. Only then can you see which scheme is genuinely lighter.

So in a rising-rate cycle like the present, the lean is clear: when in doubt, a longer fixed period is generally the safer pick. You give up a little of that "cheap rate up front" in exchange for years of certainty.

An Illustration: Installments for the Emerald 70 House

To keep it from getting too abstract, let's use the Emerald 70 house at Kingspoint, priced in the Rp 700-million range (VAT included). Assume the mortgage is around Rp 700 million over a 20-year term. The numbers below are only an illustration to show the pattern. Actual interest rates vary from bank to bank, so don't treat them as a fixed benchmark.

• Scheme A — 5-year fix: the rate is locked at a set figure for the first 5 years. The installment stays steady at the same range each month, whatever happens to the BI Rate. Only after year 5 does it enter floating.
• Scheme B — floating teaser: a very cheap rate in the first 1 to 2 years, so the installment feels light at the start. But from year three, once floating kicks in, the installment can rise to follow a benchmark that's running high.

Here's what often happens: people are drawn to Scheme B because the opening installment looks cheap, then get a shock in year three when it climbs. Yet at Emerald 70, installments can already start from Rp 5 million a month, a figure that's more sensible to plan around with a clear fixed scheme than by guessing at a floating jump. The right move is still to ask for an official simulation directly, since each bank has its own rate table.

Before You Sign, Settle This First

Choosing a rate scheme is one thing. But the very first step actually comes well before that: make sure you get a mortgage pre-approval before you go around viewing houses, so you know the ceiling and the scheme that's realistic for you. Only then should you compare fixed vs floating offers across banks with a clear head.

Location also shapes long-term peace of mind. Emerald 70 sits on Jl. Raya Perjuangan, North Bekasi: 5 minutes to Bekasi Station, 5 minutes to Summarecon Mall, 10 minutes to the Bekasi Barat toll gate, flood-free, and near the planned MRT Phase 3. It's a two-story house with land area 47.25 m² and building area 70 m². These are the factors that make a long-term mortgage decision feel more solid, because the value isn't only about the rate, it's about where you're putting that installment for years to come.

Also read: Mortgage Installment Simulation & Tenor Options in Bekasi · Floating Mortgage Rates Rise: The Impact on Your Installment · OJK's SLIK Relaxation and Its Impact on Mortgage Approval