To upgrade from HDB to condo in Singapore you have to win three money fights at once: pay Additional Buyer's Stamp Duty of 20% upfront and claw it back, find enough cash for the 25% downpayment before your flat sale settles, and refund every cent of CPF you used (plus accrued interest) into your CPF account. Get the sequence wrong and a $300,000 ABSD bill becomes permanent instead of refundable. This is the 2026 playbook with the rates verified against IRAS, HDB and MAS, the sell-first versus buy-first call laid out in dollars, and the bridging-loan trap that catches upgraders who assume their flat will sell on time.
Two gates decide whether the upgrade is on the table at all. The first is the Minimum Occupation Period. Almost every HDB flat carries a 5-year MOP measured from when you collected the keys, and you cannot sell, rent out the whole flat or buy private property until it clears. Renovation downtime and any period you rented elsewhere do not count toward it.
The second gate is your loan headroom. Once you move to a private condo, the Mortgage Servicing Ratio that caps HDB and EC loans at 30% of gross monthly income no longer applies. Only the Total Debt Servicing Ratio remains, which lets up to 55% of gross income service all your debts. That single switch is why upgraders can often borrow more against the same salary on a condo than they could on a flat.
A condo is your second residential property the moment you buy it before selling the HDB, so it attracts Additional Buyer's Stamp Duty. For a Singapore Citizen the second-property ABSD rate is 20% (Singapore PRs pay 30% on a second property, and these rates have stood since the April 2023 cooling measures). On a $1.5 million condo that is $300,000 in ABSD on top of the ordinary stamp duty.
Married couples do not have to eat that. IRAS grants ABSD remission to a couple where at least one spouse is a Singapore Citizen, provided you sell your existing home within six months of buying the replacement. You still pay the 20% upfront, then apply to IRAS for a refund once the HDB sale legally completes. Miss the six-month window and the refund is gone for good.
Read the deadline carefully. IRAS counts the six months from the legal completion date of your condo purchase for a completed resale unit, or from the project's TOP date for a new launch. For a resale HDB that typically settles 8 to 12 weeks after the buyer exercises the option, six months is tight but workable; for a new launch still years from TOP, you have far more runway.
This is the decision that separates a clean upgrade from a cash-flow disaster. Sell first and you sidestep ABSD entirely because the condo becomes your only property, but you may need interim rental housing between moving out and key collection. Buy first and you secure your dream unit immediately, but you front the full 20% ABSD and bet on your flat selling inside the six-month remission window.
| Factor | Sell HDB first | Buy condo first |
|---|---|---|
| ABSD on the condo | $0 (condo is your only property) | 20% upfront, refundable if HDB sells within 6 months |
| Cash crunch risk | Lower; you hold sale proceeds before committing | Higher; you fund downpayment + ABSD before flat money arrives |
| Interim housing | Likely need to rent 6-18 months | None; move straight across |
| Choice of unit | May lose units while you wait to sell | Lock in the unit you want now |
| Bridging loan | Rarely needed | Often needed to cover the gap |
| Worst case | Prices rise before you buy back in | Flat does not sell; you carry two mortgages + lose ABSD refund |
When you buy first, your condo downpayment is due before the cash from your HDB sale lands. A bridging loan closes that gap. It is a short-term loan, capped at six months by the major banks, secured against your incoming sale proceeds and usually interest-only during the bridge.
Rates in 2026 sit higher than a normal mortgage. As of June 2026, Standard Chartered prices its HDB bridging loan at 3-month SORA plus 2.50% p.a., and market rates across banks generally land in the 5% to 6% p.a. range. Some banks waive the bridging fee if you take your home loan with them. HDB itself does not lend bridging money, so this is a bank product.
The trap: a bridging loan only makes sense once you hold a signed Option to Purchase from your HDB buyer, because that fixes the proceeds the bank is lending against. Bridge before you have a buyer and a delayed or collapsed sale leaves you carrying the new mortgage and the bridge at once. Keep a cash buffer sized to several months of both repayments before you sign.
Loan-to-value for a bank mortgage on a private property is capped at 75% if you have no other housing loan, so you fund at least 25% from cash and CPF, with a minimum 5% in hard cash. Layer Buyer's Stamp Duty on top. BSD on residential property runs on marginal bands up to 6%; on a $1.5 million condo the BSD is $44,600, and on a $2 million unit it is $69,600 (IRAS rates unchanged since 15 February 2023).
If you bought first, add the refundable 20% ABSD to the day-one outlay. Then there is the CPF refund nobody enjoys: when you sell the HDB, every dollar of CPF you used for it must go back into your CPF Ordinary Account together with accrued interest at 2.5% p.a. That refund is not lost, but it does not become spendable cash, so a paper profit can shrink to little cash in hand.
If you would rather keep the HDB as a rental and still buy a condo at first-property ABSD rates, decoupling is the structure people reach for. One spouse takes sole ownership of the flat; the other, now owning no property, buys the condo in their own name as a first-time buyer and pays 0% ABSD.
It is not free or simple. HDB flats generally cannot be decoupled by transferring a share between spouses except in narrow circumstances, so this works far more cleanly on private property than on a flat. You also need each person to qualify for their own loan on a single income, you pay BSD on the transferred share, and you may face legal and valuation fees. Run the sums against simply selling before you assume decoupling wins. We break the mechanics down in our decoupling explainer.
Most HDB-to-condo upgrades run 9 to 12 months end to end. Build in slack: the six-month ABSD clock and the bridging-loan window are unforgiving, and an HDB resale completion alone needs roughly 8 to 12 weeks after the option is exercised.
If you buy the condo before selling your HDB it counts as a second property, so a Singapore Citizen pays 20% ABSD upfront. Married couples with at least one citizen can claim it back via IRAS remission if they sell the HDB within six months of buying the replacement home. Selling the HDB first avoids ABSD entirely because the condo is then your only property.
Sell first to avoid ABSD outlay and cash-flow risk, accepting you may need interim rental and could miss units. Buy first to lock in the unit you want, accepting you front the 20% ABSD and often a bridging loan, and you bet on the flat selling inside the six-month remission window. The right choice depends on your cash buffer and how tight the market is.
Plan for at least 25% of the condo price as downpayment, with a minimum 5% in cash, plus Buyer's Stamp Duty up to 6% (about $44,600 on a $1.5 million unit). If you buy first, add 20% refundable ABSD on day one. Remember CPF used on the flat is refunded to your CPF account with accrued interest rather than paid to you as spendable cash.
A bridging loan is a short-term bank loan, capped at six months, that covers the gap between paying your condo downpayment and receiving your HDB sale proceeds. As of June 2026 rates run roughly 5% to 6% p.a. You only need one if you buy before your flat money arrives, and you should only sign once you hold a confirmed Option to Purchase from your HDB buyer.
This is general financial information for Singapore, not personal financial advice. Figures change — verify current rates against the official sources above before acting. See our full disclaimer.