Should I sell my HDB before buying a condo in Singapore?

Selling HDB first avoids 20% ABSD on the condo (as it becomes your first private property) but creates a housing gap requiring bridging or temporary rental. Buying condo first triggers 20% ABSD upfront, refundable if HDB is sold within 6 months of the condo's completion or TOP date.

What is the cost of the bridging loan if I sell HDB first in Singapore?

A Singapore bridging loan typically costs 2.5–3% per annum on the drawn amount. On a $300,000 bridging facility over 3 months, interest cost is approximately $1,875–$2,250 -- far cheaper than the ABSD float, but creates a homeless gap that must be managed.

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HDB Upgrading

Sell HDB First or Buy Condo First? ABSD Maths in 2026

By Winfred Quek · CEA R073319H · 10-minute read · Last reviewed May 2026

Quick answer: Selling HDB first means 0% ABSD on the condo but requires a temporary housing solution (bridging facility or rental) during the gap. Buying condo first means paying 20% ABSD upfront on a $1.5M condo that is $300,000 tied up but it is fully refunded if you sell the HDB within 6 months of the condo's completion or TOP. For a new launch condo TOPing in 3–4 years, the new launch route (Scenario C) is often the cleanest: buy now, live in HDB during construction, sell HDB in your own time before TOP, and collect the condo keys with 0 ABSD exposure. The right answer depends on whether a resale or new launch condo fits your target.

Facts verified: May 2026 · Sources linked below

Key Takeaways

• Sell first (Scenario A): 0% ABSD, but you need rental or bridging typically S$3,000–S$5,000/month rental for 3–6 months while securing the condo.
• Buy resale condo first (Scenario B): S$300K ABSD float on a S$1.5M condo fully refunded only if HDB is sold within 6 months of condo completion. Miss the deadline and the S$300K is forfeit.
• New launch (Scenario C): Cleanest path 0% ABSD exposure if you sell HDB any time before TOP; you live in the HDB during the 3–4 year construction window at no extra cost.
• LTV trap: if you have an outstanding HDB loan when buying the condo, LTV drops to 45% requiring a much larger cash/CPF downpayment on the new property.
• According to IRAS, the 6-month deadline for ABSD remission runs from the date of Temporary Occupation Permit (TOP) or Certificate of Statutory Completion not the purchase date.

Real Example: Clementi 4-Room Couple Choosing Their Upgrade Path

Detail	Scenario A: Sell HDB First	Scenario C: Buy New Launch First
Profile	SC married couple, both 35, household income $15,000/month. Own 4-room Clementi HDB (MOP cleared). Target: $1.5M resale/new launch condo in D5.
HDB estimated value	$780,000	$780,000
Outstanding HDB loan	$0 (fully paid)	$0 (fully paid)
CPF OA balance (combined)	$180,000 (after accrued interest)	$180,000
Net HDB sale proceeds (cash to bank)	~$460,000 (after CPF refund + accrued interest)	Received ~year 3 after booking (optimal timing)
Condo purchase price	$1,500,000	$1,500,000 new launch
ABSD payable	$0 (already sold HDB)	$300,000 upfront (refunded at TOP)
BSD	$44,600	$44,600
Cash required at purchase	$75,000 (5% cash min) + $44,600 BSD = $119,600	$75,000 (5%) + $44,600 (BSD) + $300,000 (ABSD) = $419,600
Housing gap cost	~$4,000/month rental × 4 months = $16,000	$0 stay in HDB until TOP (year 3–4)
ABSD float opportunity cost	$0	$300,000 × 1.5% × 3.5 years = $15,750
Monthly mortgage at possession (75% LTV, 25yr, 1.6%)	$4,740/month, starts within 12 weeks	$4,740/month, starts at TOP (year 3)
Total friction cost vs 0 baseline	~$16,000 (rental gap)	~$15,750 (ABSD float)
Verdict	Best if they have a place to stay during the gap	Best if they want seamless housing continuity with time to optimise HDB sale

In this case the costs are near-identical (~$16K vs ~$15.75K). The real differentiator is whether the couple has temporary accommodation. If yes, Scenario A is simplest. If no, Scenario C (new launch) eliminates the housing gap entirely.

The three sequencing scenarios

Every HDB upgrader who currently owns an HDB flat and wants to buy private property faces a sequencing decision. There are three distinct paths, each with different ABSD exposure, cash flow profile, and execution risk.

Scenario A: Sell HDB first, then buy condo

You sell the HDB, complete the sale, receive proceeds, then purchase the condo. Because you no longer own any residential property at the time of condo purchase, it is your first property ABSD = 0%.

The challenge: There is a gap between HDB sale completion and condo purchase completion. During this gap, you need somewhere to live. Options:

Stay with family temporarily (no cost, requires family support)
Rent a private apartment or HDB room short-term ($3,000–$5,000/month for an equivalent space)
Negotiate a longer stay with the HDB buyer via a deferred completion or leaseback arrangement
Use a bridging loan to fund the purchase of the new condo before the HDB sale completes effectively reducing the gap

Bridging loan cost: Singapore banks offer bridging loans (also called bridging facilities) to cover the gap between buying and selling. Typically priced at 2.5%–3.0% per annum on the overdraft amount drawn. For a $300,000 bridging facility over 3 months: interest = $300,000 × 2.75% × (3/12) = $2,063. Very manageable.

Scenario B: Buy condo first (resale), then sell HDB within 6 months

You purchase the condo while still owning the HDB. This is technically a second property purchase 20% ABSD applies upfront. However, under the ABSD Married Couple Remission, if both spouses are named on the new condo title and the HDB is sold (completed) within 6 months of the condo's completion date, IRAS refunds the full 20% ABSD.

The challenge: The 6-month clock is tight for a resale condo. You must sell the HDB get an OTP, go through HDB's resale process, and complete within 6 months of moving into the new condo. The HDB resale process alone takes 8–12 weeks minimum. This leaves you with roughly 2–4 months of marketing time before you must have a buyer with signed OTP.

ABSD float cost: On a $1.5M condo, 20% ABSD = $300,000 that must be paid upfront at stamping, tied up for up to 6 months, then refunded. Cost of capital at 1.5%/year: $300,000 × 1.5% × (6/12) = $2,250. Nearly identical to the Scenario A bridging cost.

Scenario C: Buy new launch condo, sell HDB before TOP

You book a new launch condo today. The 6-month ABSD remission clock only starts at TOP which is 3–4 years away. You continue living in your HDB during the construction period, sell the HDB at a time of your choosing within those 3–4 years, and then receive the condo keys at TOP.

The advantage: You have years not months to sell the HDB. You can time the HDB sale optimally. You avoid any housing gap because you stay in the HDB until the condo is ready. You pay 20% ABSD upfront at booking, but the refund risk is very low given the extended sell-down window.

The constraint: You must be buying a new launch, not a resale. If your preferred condo is a resale, Scenario C is not available.

Cost comparison at $1.5M condo / $600K HDB

Cost Item	Scenario A: Sell First	Scenario B: Buy Resale First	Scenario C: Buy New Launch First
ABSD payable	$0	$300,000 upfront (refunded)	$300,000 upfront (refunded)
ABSD permanently lost	$0	$0 (if HDB sold in time)	$0 (plenty of time)
Bridging loan cost	~$2,063 (3 months, $300K facility)	$0	$0
Temporary rental cost	$3,000–$5,000/month × gap duration	$0 (stay in HDB)	$0 (stay in HDB until TOP)
ABSD float opportunity cost	$0	$2,250 (6 months at 1.5%)	$13,500–$22,500 (3–5 years at 1.5%)
LTV on condo loan	75% (no outstanding loans)	45% (HDB loan still outstanding)	75% (HDB sold before TOP drawdown)
Execution risk	Low no deadline pressure	High 6 months to sell HDB	Low years to sell HDB
Housing continuity	Gap exists need bridging or rental	Seamless stay in HDB until condo ready	Seamless stay in HDB throughout construction
Best for	Couples with family accommodation option, or resale condo target	Couples with high HDB demand, confident of quick sale	Couples flexible on new launch, want minimal stress

Why Does the LTV Trap in Scenario B Catch So Many Upgraders?

When you buy a condo while your HDB loan is still outstanding, your LTV for the new condo drops from 75% to 45%. This has two major consequences:

Higher downpayment required: On a $1.5M condo at 45% LTV, the loan is only $675,000. You must fund the remaining $825,000 from CPF and cash versus $375,000 at 75% LTV. That is $450,000 more you need to have available upfront.
Cash minimum rises: At 45% LTV, the minimum cash downpayment increases to 25% of purchase price = $375,000 in cash (not CPF). At 75% LTV, minimum cash is just 5% = $75,000.

For most HDB upgraders, $375,000 in liquid cash is simply not available making Scenario B (buy resale condo first) practically impossible unless the HDB has been fully paid off (no outstanding HDB loan) and the couple has large savings. If the HDB still has a loan balance, Scenario B is ruled out by LTV constraints even before the ABSD question arises.

Critical caveat Scenario B only works if the ABSD remission conditions are fully met: The married couple remission requires (1) at least one SC, (2) both spouses named on the new condo title, (3) all existing properties disposed within 6 months of the new property's completion date. If you miss the deadline by even one day, the full $300,000 ABSD is forfeited with no recourse. Given Singapore's average HDB resale DOM (days on market) of 60–90 days in 2026, plus 8–12 weeks for HDB to process the resale, the 6-month window is genuinely tight for most sellers. Only pursue Scenario B if you are confident in your HDB's saleability and willing to price aggressively if needed.

Scenario C deep dive: new launch as the "stress free upgrade"

For couples who have flexibility on the type of condo (resale vs new launch) and a 3–5 year horizon, Scenario C is structurally the lowest-risk path. Here is the full timeline:

Month 0: Book new launch condo. Pay 5% booking fee ($75,000 on $1.5M). Pay 20% ABSD ($300,000) at S&P signing within 8 weeks.

Month 0 to Month 36–48: Continue living in HDB. Progressive loan drawdown by bank as construction milestones are hit. You pay only interest on drawn portion far lower than full mortgage.

Any time before TOP: Market and sell HDB at your chosen timing. No deadline pressure. Can wait for favourable HDB market conditions. Goal: complete HDB sale at least 3 months before estimated TOP date.

After HDB sold: CPF refund flows back to CPF OA. Cash from HDB sale goes to bank. Now you have the full war chest available and no existing residential property. When the condo TOPs, your mortgage kicks in fully but you are in the clear on ABSD remission.

At TOP: Collect keys to condo. Within 6 months of TOP, submit IRAS remission claim with supporting documents. ABSD refunded to your bank account within 4–8 weeks of submission.

Net result: You lived in HDB rent-free throughout construction, timed your HDB sale well, and recovered the $300,000 ABSD. Total extra cost vs Scenario A: ~$13,500–$22,500 in opportunity cost on the ABSD float (3–5 years at 1.5%). Worth it for most couples given the zero execution risk.

What Does the HDB Resale Market Look Like in 2026 and How Does It Affect Your Timing?

Understanding HDB market conditions is essential for assessing Scenario B execution risk. In Q1–Q2 2026, the HDB resale market shows:

Average days on market (DOM) for well-priced HDB: 60–90 days from listing to OTP
HDB resale process after OTP: 8–10 weeks minimum
Total time from listing to completion: 16–22 weeks (4–5.5 months)
For Scenario B (6-month clock): this leaves 2–8 weeks of marketing time before you must have a signed OTP
Well-priced, well-located HDB units (e.g., Queenstown, Bishan, Toa Payoh) typically move within 45–60 days; fringe estates may take 3–4 months

Bottom line: if your HDB is in a mature, high-demand estate and you are prepared to price it at or slightly below market, Scenario B is executable. If your HDB is in a less liquid location or you want to maximise sale price, the compressed 6-month timeline creates real risk of missing the ABSD refund deadline.

Three-scenario decision guide: which path fits which profile

Profile	Recommended Scenario	Reason
Has family to stay with during gap; wants resale condo	Scenario A (sell first)	0% ABSD, no float cost, bridging only if needed. Cleanest financially.
High-demand HDB (mature estate, good floor), wants resale condo, confident of quick sale	Scenario B (buy resale first)	Avoids housing gap. Tight but executable if HDB is genuinely sellable in 4 months.
Flexible on new vs resale condo; wants zero execution stress; happy to wait 3–4 years for TOP	Scenario C (buy new launch first)	Best risk adjusted outcome. ABSD float cost is modest. No gap, no deadline pressure.
HDB has outstanding loan; can only fund 45% LTV scenario	Scenario A (must sell first)	Second property LTV constraints make Scenario B financially impossible.
SC+PR couple; PR not on HDB; buying in PR sole name	Scenario A variant	PR buying first property pays 5% ABSD. Sell HDB (SC sole) anytime. No remission needed.

Decision checklist: sell HDB first or buy condo first?

Step 1: Check your HDB loan status. If HDB loan is outstanding, Scenario B is likely off the table (45% LTV, 25% cash downpayment required). Scenario A or C only.

Step 2: Decide: resale condo or new launch? If resale, choose Scenario A or B. If new launch, Scenario C is available and usually preferable.

Step 3: Assess your HDB's liquidity. How fast does your block / street / estate sell? Check HDB resale transaction data at HDB Resale Flat Prices portal. If average DOM in your sub-estate is 3+ months, Scenario B is risky.

Step 4: Model the ABSD float cost vs bridging cost. Use the formula: ABSD float = purchase price × 20% × 1.5% × (years to TOP). Bridging = bridge amount × 2.75% × (months/12). For most scenarios these costs are similar in absolute terms the decision driver is execution risk, not cost.

Step 5: Check your CPF OA balance. For Scenario B or C, you pay 20% ABSD in cash at stamping CPF cannot be used for ABSD. Confirm you have $300,000+ in liquid cash (for a $1.5M purchase) available before committing to buy-first paths. Use Winfred's ABSD Calculator.

Step 6: Run affordability at your target condo price. Use Winfred's Affordability Calculator. For Scenario A: LTV 75%, standard TDSR. For Scenario B: LTV 45%, both loans in TDSR. Ensure you qualify under the correct scenario's constraints.

Step 7: Book a Portfolio Analysis call. The sequencing decision is the most consequential financial choice in the entire upgrade process. Getting it wrong costs $300,000 in forfeited ABSD or months of expensive temporary rental. Get the numbers validated before signing any OTP.

Winfred's Take

The question "sell first or buy first?" sounds like a sequencing problem but it is actually a liquidity and risk tolerance test. Scenario B (buy resale condo first, claim remission) looks attractive on paper, but it requires S$300K cash ABSD sitting idle for up to 6 months while you sell the HDB under time pressure and HDB sellers who feel rushed accept worse offers. For most couples I work with, Scenario C (new launch buffer) wins not because it is cheapest, but because it removes the time pressure entirely and lets you negotiate the HDB sale from a position of strength.