SORA Is Now the Benchmark That Sets Your Home Loan Cost

The SORA benchmark is driving what you pay for a Singapore home loan in 2026, and it deserves more attention than the latest property price index.

Key takeaways

• SORA is a transaction-based overnight rate published by the Monetary Authority of Singapore, and it has replaced SIBOR as the reference rate for new bank home loans (Monetary Authority of Singapore, 2026).
• Global bond markets are pushing rates higher: Japan’s 10-year government bond yield is at a three-decade peak, and Japanese bond ETFs have drawn a record US$1.5 billion in net inflows in 2026 (The Business Times, 2026).
• Private home prices in 2026-Q2 averaged S$2,038 psf, sitting 6.8% below the S$2,186 psf peak but still 33.3% above the S$1,529 psf trough (Keystone data/URA caveat data).
• HDB resale prices are pinned at S$652 psf, exactly at their peak and 57.5% above the S$414 psf trough (Keystone data/URA caveat data).
• TDSR caps your total monthly debt at 55% of your gross income, so a shift in SORA changes the maximum loan you can carry even if your pay does not move (99.co, 2026).

Why SORA replaced SIBOR

What SORA actually measures

SORA stands for the Singapore Overnight Rate Average. It is not a policy rate set by the central bank in the way a benchmark policy rate might be. Instead, it is a volume-weighted average of actual unsecured overnight interbank Singapore dollar transactions, published by the Monetary Authority of Singapore (Monetary Authority of Singapore, 2026). In plain language: SORA is built from money that really changed hands between banks, not from what banks said they would charge.

That distinction matters. The old SIBOR system relied on banks submitting quotes for interbank lending. After the global rate-rigging scandals that discredited LIBOR, regulators worldwide moved toward transaction-based benchmarks. Singapore moved early. For property buyers, the switch was not cosmetic. A SIBOR rate was quoted in advance for a fixed term. SORA is an overnight rate that must be compounded over time to reflect true borrowing costs.

So when you take a SORA-pegged home loan, your rate is not locked by a single quote at the start of a quarter. It is averaged from daily SORA readings over a set period, commonly one month or three months. The result is a mortgage that tracks reality more closely — but also one that moves more visibly when global funding conditions shift.

The end of SIBOR

The transition away from SIBOR was a deliberate, regulatory-driven move. Banks in Singapore have shifted their new mortgage contracts to SORA-based formulas. Existing borrowers on SIBOR were offered conversion paths, and the overall market has largely moved over.

For buyers, the practical effect is simple: your monthly instalment is now a function of SORA plus a lender margin. That margin is usually fixed, but SORA is not. When SORA rises, your payment rises. When SORA falls, you get the relief. The discipline required of a borrower is therefore higher: you are taking variable-rate exposure whether you think you are or not.

How global rates push SORA

Japan’s bond market is the tell

SORA does not exist in a vacuum. It is an overnight rate in a global funding market, and 2026 is serving up a reminder that rates can move fast and with little warning. Japan, the last major economy with ultra-low yields, is now showing real strain. The country’s 10-year government bond yield has climbed to a three-decade peak as inflation and fiscal worries mount (The Business Times, 2026).

Investors are positioning for that shift. Japanese bond ETFs have attracted a record US$1.5 billion in net inflows so far in 2026, according to Morningstar data cited by The Business Times (2026). More importantly, Japan’s government is weighing a 3.8% assumed rate for next year’s budget request (The Business Times, 2026). A number like that, embedded in a major economy’s official planning, tells you that the era of cheap government funding is receding.

The yen has also strengthened as Tokyo considers nudging pension funds into domestic assets (The Business Times, 2026). That capital realignment matters beyond Japan. Global bond repricing changes the cost base for banks everywhere, including in Singapore. When funding costs drift upward in the major markets, the liquidity conditions that SORA measures feel the pull.

The spillover to Singapore

Singapore is a small, open economy, and its interest rates are heavily influenced by global money flows. The Monetary Authority of Singapore runs an exchange-rate centred policy, which means domestic rates are not fully insulated from external moves. When global yields rise, banks in Singapore face higher cost of funds, and SORA reflects that through the actual transactions conducted overnight.

This is why buyers should watch Tokyo and Washington, not just the latest Singapore property statistics. A 10-basis-point move in SORA may seem small, but in a market where private prices sit at S$2,038 psf, every basis point is multiplied across a large mortgage.

The data: prices versus the benchmark

Private prices: off the peak but not off the floor

Let’s put SORA next to the property data. The private residential market in 2026-Q2 is not at a peak, but it is nowhere near a trough. Islandwide private prices averaged S$2,038 psf in the quarter, according to URA caveat data compiled by Keystone. That is 6.8% below the S$2,186 psf peak, but still 33.3% above the S$1,529 psf trough (Keystone data/URA caveat data).

In other words, the market has given back a slice of the run-up, not a crash. The gap between the peak and the current level is roughly 6.8%, which means buyers who entered at the top are sitting on a modest paper loss. But the 33.3% cushion above the trough shows how much cumulative appreciation remains in the system.

Regions and new launches

The price picture varies sharply by region. Prime-core CCR homes have averaged S$2,444 psf, city-fringe RCR homes S$2,078 psf, and suburban OCR homes S$1,551 psf (Keystone data/URA caveat data). The closer you get to the city centre, the larger the loan required — and the larger the SORA-driven monthly payment.

New launches add another layer of pressure. New-launch private homes averaged S$2,304 psf against S$1,595 psf for resale, a roughly 44% new-sale premium (Keystone data/URA caveat data). Buyers who insist on a fresh development pay that premium before they even begin negotiating interest rates. That S$709 per square foot gap is not a small detail; it is the difference between a manageable loan and one that swings significantly with every SORA movement. The premium exists on the price, and then it is financed at a variable rate.

HDB resale: flat at the peak

The HDB resale market tells a different story. Islandwide HDB prices averaged S$652 psf in 2026-Q2, exactly at their peak and 57.5% above the S$414 psf trough (Keystone data/URA caveat data). Zero per cent above the previous high is not a sign of stagnation; it is a sign that the public resale market has used up its cheap-rate advantage.

For HDB buyers, the TDSR constraint is just as binding as it is for private buyers. A SORA-linked bank loan is still subject to the same 55% debt ceiling. The only relief is the lower absolute price: at S$652 psf, a 1,000 sq ft flat would cost far less than a comparable private home, which means a lower loan quantum and less exposure to SORA swings. But the exposure is still there.

SORA in your mortgage: a per-buyer breakdown

The 55% TDSR ceiling in practice

Let’s walk through a concrete case. Say you earn S$5,000 gross a month and have no other debts. Your TDSR ceiling is 55% of that income, which gives you S$2,750 of monthly room for your mortgage (99.co, 2026). That S$2,750 is the maximum the bank will allow you to repay for the housing loan, before property taxes, maintenance, and other living costs.

Now bring in SORA. If the SORA-linked rate rises, your monthly payment for a given loan amount will go up. Because TDSR is a hard ceiling, the bank will not allow your payment to exceed S$2,750. So the loan quantum you qualify for must shrink. You have three options: stretch your loan tenure to lower the monthly payment, lower the price you are targeting, or put down a bigger downpayment. None of these is painless. A longer tenure means more interest paid over the life of the loan. A lower price means moving further out or choosing an older resale unit. A bigger downpayment means tying up more cash.

The variable income discount

TDSR is also strict about income quality. Only 70% of variable income — commissions, bonuses, rental income — is counted toward your borrowing capacity, and banks typically average that variable income over the preceding 12 months (99.co, 2026). This is a critical detail for investors and self-employed buyers. A landlord with S$10,000 a month in rental income cannot simply add S$10,000 to his borrowing base; the bank counts S$7,000.

The combination of TDSR and SORA is therefore doubly punishing for variable-income earners. Your income multiple is already discounted, and your mortgage rate is moving with the market. If your bonus slips in a high-SORA year, both sides of the equation move against you.

The new launch premium and SORA compounding

New launch buyers feel this most acutely. With new units at S$2,304 psf versus resale at S$1,595 psf, a buyer who chooses a new condo is financing a large premium at a variable rate (Keystone data/URA caveat data). Suppose that premium is financed over a 30-year loan. Any rise in SORA not only raises the repayment on the base loan, but also on the premium. The compounding schedule matters too. Some SORA packages compound monthly, others quarterly. In a rising rate cycle, quarterly compounding lags daily market rates, which can feel more forgiving at first. But the catch-up can be abrupt when rates are climbing steadily.

What to watch in 2026

Compounding schedules matter

The mechanics of SORA loans are not uniform. Some packages use a one-month compounded average, others a three-month average. The difference is not trivial. A three-month compounded rate smooths short-term volatility, but it also delays the benefit when rates fall. A one-month rate is more responsive, which is helpful in a declining rate environment but uncomfortable when rates are rising.

You should read the reset period on any loan quote before you sign. If the lender is quoting a margin plus SORA, ask which SORA — the daily rate or a compounded average — and over what period. The difference in your monthly payment can be significant in a volatile year.

Refinancing under the 55% ceiling

Refinancing is often presented as the escape hatch when your current SORA package becomes expensive. But the 55% TDSR limit applies to new loan applications, including refinancing, if your OTP or mortgage equity withdrawal application was made on or after 16 December 2021 (99.co, 2026). If your income has not grown since you took the original loan, you may find that the same loan amount no longer fits under the lower TDSR ceiling.

Borrowers who took loans before the rule change had access to a 60% TDSR ceiling. They are not affected retroactively for existing loans, but any new refinancing application will be tested at 55%. That means moving to a SORA package is not always possible if you have stretched your debt close to the old limit. In a high-SORA environment, the combination of a lower TDSR ceiling and a higher rate can trap you in your current loan.

The central message for 2026 is simple: SORA is the rate that moves your mortgage, and it is moving. Check your compounding schedule, stress-test your budget at a higher rate, and do not assume that a lower price index means a lower payment. The benchmark is doing the real work.

FAQ

What is SORA and why does it matter to me? SORA is the Singapore Overnight Rate Average, a volume-weighted average of actual unsecured overnight interbank Singapore dollar transactions published by the Monetary Authority of Singapore (2026). It matters because most new bank home loans use a compounded average of SORA as their base rate, so when SORA moves, your monthly instalment moves.

How is a SORA mortgage rate calculated? A SORA mortgage is priced as a fixed margin on top of a compounded average of daily SORA rates over a defined period, often one month or three months. Your monthly payment is recalculated at each reset. This is different from a fixed-rate loan, where the payment is locked for a set period.

What is the current TDSR limit? The Total Debt Servicing Ratio caps your total monthly debt repayments, including the mortgage you are applying for, at 55% of your gross monthly income (99.co, 2026). The limit was reduced from 60% for OTPs granted on or after 16 December 2021. A SORA rise raises the monthly payment for a given loan, which reduces the loan size you can qualify for within the cap.

Does the 55% TDSR limit affect refinancing? Yes, for new loan applications and mortgage equity withdrawal applications made on or after 16 December 2021 (99.co, 2026). Existing loans granted before that date are not affected, but a refinancing application must comply with the lower threshold. If your income has not risen, you may not be able to refinance the same loan amount on a SORA package.

What should I do before committing to a SORA-pegged loan? Stress-test your budget at a SORA rate above today’s level, not just at the current rate. Keep your non-mortgage debts low, and remember that only 70% of variable income is typically counted for TDSR purposes (99.co, 2026). If the monthly payment feels tight at a higher SORA, the property is probably too expensive for you.

By the numbers

Private PSF momentum by district — QoQ %

D11   +28.6%  ██████████████████████████
D26   +12.0%  ███████████
D25    +8.8%  ████████
D12    +6.6%  ██████
D08    +5.4%  █████
D20    +4.0%  ████
D28    +3.9%  ████
D02    +0.2%  █
D14    -0.5%  ░
D22    -0.6%  ░

Data: Keystone Real Estate analysis of URA/HDB transaction data — rolling 3-month average PSF, private residential, 2026-06..2026-08. Directional; confirm before acting.

Sources

• URA caveat data, compiled by Keystone — 2026-Q2.
• URA caveat data, compiled by Keystone.

References

• Monetary Authority of Singapore (2026) SORA Interest Rate Benchmark.