In the first half of 2026 the rupiah weakened against the US dollar, extending pressure that had been building since late last year. The Ministry of Industry and building-material associations have noted in several releases that most construction materials still depend on imported components — either the goods come in directly, or the raw inputs are bought in dollars. When the rupiah slides, that supply-chain cost rises from the top.
One thing worth being clear about: this is a different story from rising prices in the secondary market. Pre-owned home prices climb on demand and location. New-build prices from a developer climb because the cost to build changes. The exchange rate comes in through that second door.
The Transmission Path: From the Rate to the Sticker Price
The building-material price data that BPS compiles each month shows metal and ceramic components among the most sensitive to exchange-rate moves. The logic is straightforward. Rebar and light steel carry a large imported raw-material content; the iron ore and scrap behind them are priced in dollars on the global market. When the rupiah weakens 5 percent, the rupiah cost of buying steel rises roughly in line, before other factors are counted.
Ceramics, sanitaryware, and aluminium tell a similar story. Plenty of finished products are imported whole, and even the locally produced ones often use glaze, frit, or aluminium billet bought in dollars. Cement is a bit different — its raw material is local, but the energy used to fire clinker (coal and other energy inputs) stays tied to global prices, so cement takes an indirect hit through energy cost.
Which Materials Are Most Exposed to the Rate
Here's a picture of import dependence by material category, and how a weaker rupiah usually shows up. This is a general framework for reading direction, not a quote for any specific project:
| Material category | Import exposure | Typical effect when the rupiah weakens |
|---|---|---|
| Steel, rebar, light steel | High | Price rises almost in step with the rate; raw material is dollar-priced |
| Aluminium (frames, fittings) | High | Imported billet; quick rise following the rate |
| Imported ceramics & sanitaryware | High | Finished goods shipped in; shelf prices adjust right away |
| Imported fittings & hardware (taps, locks) | Medium–high | Gradual, depends on distributors' old stock |
| Local ceramics & sanitaryware | Medium | Held-back rise; some inputs (glaze) still imported |
| Cement | Low–medium | Indirect; through the energy cost of firing clinker |
| Sand, stone, aggregate | Low | Barely touched by the rate; more about haulage cost |
So the part that pushes the build bill up first is structure — steel and reinforced concrete — with imported finishes following. For a two-storey home with bored-pile foundations like the Emerald 70 type, the steel and concrete share of total cost is sizeable, so its sensitivity to the rate is fairly noticeable.
There's a Lag Before Launch Prices Move
A weaker rupiah doesn't change a developer's price list the same month. Several natural brakes apply. Material for units already under construction was partly bought at old prices, distributors still hold stock at earlier contract prices, and contractors are tied to agreed lump-sum rates. From the pattern of previous rupiah-weakening cycles, higher material costs only show up in new-project selling prices around three to six months later — once the cheap stock runs out and the next purchase uses the new rate.
That leaves a developer launching a new cluster in the second half of 2026 with an awkward choice: absorb the cost increase and thin the margin, or raise the launch price. Most end up raising, gradually, to avoid spooking the market. For a buyer, that lag is actually a window to act before the adjustment lands.
A common misread: plenty of people wait for “home prices to fall” when the economy feels heavy. But rate-driven build costs move the other way. What falls may be buying appetite, not material prices — and when demand returns, launch prices have already gone up.
The Buyer's Choice: Lock the Price Now or Wait on an Indent
At this point a buyer of a new home in Bekasi faces two paths with different risk profiles.
- Buy a ready-stock unit with the price locked now. The price is fixed at today's number, the material for that unit is already in place, so a future rate rise is no longer the buyer's problem. The cost risk shifts to the developer.
- Wait or take an indent unit. You may get a wider choice of plots, but the final price is more exposed to adjustment if material costs rise during the build. A long indent in the middle of a weakening rupiah means betting the price won't move much.
For a young family on a tight budget, certainty about the number is usually worth more than a discount that may never arrive.
Why a Fixed VAT-Included Price Works Like a Hedge
This is where a ready-stock pricing scheme earns its keep when the rate wobbles. A unit like Emerald 70 on Jl. Raya Perjuangan, North Bekasi, is marketed at around Rp 700 million with VAT already included — that number locks two things at once: the material cost already installed, and the tax component. The buyer doesn't carry it if steel or ceramics rise next month, because the house is already built. Installments can start from around Rp 5 million, and the bored-pile foundation is in the price, not a cost that turns up later.
For anyone eyeing commercial property, the three-storey Ruko Sapphire with rooftop (driven-pile and rubble-stone structure, 2200 VA supply) at around Rp 1.9 billion runs on the same logic: the larger the structure share, the more value there is in locking the price before material adjustments land. It's 5 minutes to Bekasi Station, 5 minutes to Summarecon Mall, 10 minutes to the Bekasi Barat toll gate, and close to the planned MRT Phase 3 — a flood-free part of North Bekasi, so its location value holds regardless of the rate cycle.
The honest caveat: a fixed price is no guarantee prices will never rise in future for other products. It only moves the material-cost risk off the buyer's shoulders and onto the developer for units that are already built. That's why a ready-stock unit is a more measured entry point than a long indent while the rupiah is under pressure.
Want to lock the VAT-included Emerald 70 price before material adjustments?
The Kingspoint team can check ready-stock availability and installment schemes over WhatsApp, matched to your financial profile.
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