Sell Your HDB First or Buy the Condo First? Order, Timeline and ABSD (2026 Guide)
By David Ho · CEA R027577A · · 5 min read
Should you sell your HDB flat first or buy the condo first? For most upgraders, selling first, or timing both together, is the safer order. You avoid paying 20% ABSD upfront, you keep the full 75% bank loan, and the money from your flat funds the next home. Buying first gives you certainty about where you'll live, but it costs more cash upfront, cuts your loan to 45% and leaves you racing a six-month deadline. The right order is the one your numbers can carry.
This guide compares the three routes, sets out the timeline week by week, shows how to avoid ABSD, and works through a real example. Rules and figures are as at October 2026.
The three routes, side by side
| Sell first, then buy | Buy first, then sell | Both together (concurrent) | |
|---|---|---|---|
| ABSD on the condo | None | 20% upfront for Singapore Citizens, refundable if conditions are met | None, if the flat's sale completes before you buy |
| Bank loan limit | 75% | 45% while the HDB loan is outstanding | 75% |
| Money for the downpayment | Sale proceeds and CPF refund | Your savings and CPF only | Sale proceeds and CPF refund |
| Risk | You may need a short stay elsewhere | Pressure to sell within six months | Tight timing between two transactions |
| Suits | Most upgraders | Families with large cash reserves | Families who want one move and no rent |
Route 1: sell first, then buy
You sell the flat, then buy the condo with the sale proceeds and the CPF refund in hand. Because you own no property when you buy, there is no ABSD, and the bank can lend up to 75%.
The trade-off is housing. If your flat's sale completes before your new home is ready, you need somewhere to stay. HDB can allow a temporary extension of stay after completion, subject to approval, and many families rent or stay with family for a few weeks.
Route 2: buy first, then sell
You buy the condo while still owning the flat. That makes the condo your second property, so:
- ABSD of 20% is payable within 14 days for Singapore Citizens (30% for PRs). On a $1,500,000 condo, that's $300,000.
- Your loan is capped at 45% while your HDB loan is outstanding, with at least 25% of the price in cash.
- You can claim the ABSD back if you're a married couple with at least one Singapore Citizen, and you sell the flat within six months of buying a completed condo, or within six months of a new launch's TOP or CSC, whichever is earlier.
This route works when you have enough cash for the ABSD and a larger downpayment, and you're confident the flat will sell in time. For most HDB families, the cash needed is what rules it out.
Route 3: sell and buy together
This is how many of our clients upgrade: one move, no rent in between, and no ABSD. You sell the flat and line up the condo purchase so that the flat's sale completes before you commit to the condo. Banks often help with a bridging loan, which covers the condo's downpayment until the flat's proceeds arrive, once the flat's sale is contracted.
The timing is the hard part, which is why it needs a plan before your flat goes on the market.
The timeline, week by week
| When | What happens |
|---|---|
| Three months before | Get your numbers: CPF used plus accrued interest, outstanding loan, and a bank's in-principle approval |
| Week 0 | Register your Intent to Sell on the HDB Flat Portal (wait seven days before granting an Option to Purchase) |
| Weeks 1 to 4 | Viewings; grant the Option to Purchase; the buyer has 21 days to exercise it |
| Weeks 4 to 6 | You and the buyer submit the resale application to HDB |
| Weeks 6 to 14 | HDB's resale completes about eight weeks after it accepts the application; shortlist and negotiate the condo |
| After the flat's sale completes | Exercise the condo's Option to Purchase; a resale condo usually completes 10 to 12 weeks later |
End to end, allow about three to four months. A new launch is different: you pay in stages until it's built, which usually takes a few years, so many families stay in the flat until then.
How to avoid ABSD when you upgrade
- Sell first, or time both together so the flat's sale completes before you buy. With no property owned on the day you buy, no ABSD applies.
- If you must buy first, budget for paying ABSD upfront and claiming it back. The refund only applies to married couples with at least one Singapore Citizen, and only if the flat is sold within the six-month window.
- Don't count on decoupling. Since 4 May 2016, HDB only allows a transfer between spouses for specific reasons such as divorce or death, not to avoid ABSD. Read HDB decoupling and ABSD for the details.
A worked example: how much the order changes
A couple, both 38, earn $13,000 a month together. They plan to sell their 4-room flat for $650,000. They owe $150,000 on it, used $220,000 of CPF, and have $80,000 in cash and $60,000 in CPF.
Using our HDB upgrade calculator:
| Sell first (or together) | Buy first | |
|---|---|---|
| Cash from the sale | $262,830 | Not yet |
| CPF refunded to their accounts | $220,000 | Not yet |
| Highest condo price their numbers support | About $1,843,000 | About $180,000 |
| ABSD | $0 | 20%, upfront |
Same family, same income, same savings. Buying first leaves them with roughly a tenth of the budget, because they'd need cash for 20% ABSD and a 55% downpayment without any sale money. That's why the order matters more than the market.
The highest price isn't the one we'd suggest, either. Its instalment would take about 46% of their income. See should you upgrade from HDB to a condo for how we set a comfortable budget.
Choosing the order with C.L.E.A.R
- Clarity. Your finances, goals, needs and choices: how much cash and CPF you'll have, and how much disruption your family can handle.
- List options. All three routes, plus resale condo versus new launch.
- Evaluate. Run each route through the calculator: price ceiling, ABSD, instalment and reserves.
- Align. Fit the timeline around school, work and where you'll stay.
- Reinforce. Decide your plan B before you list: what happens if the flat takes longer to sell, or the condo you want goes.
Our C.L.E.A.R framework is built for exactly this kind of decision.
Frequently asked questions
Is it better to sell my HDB first or buy the condo first?
For most upgraders, selling first or timing both together is better: no ABSD, a 75% loan, and sale proceeds to fund the purchase. Buying first suits families with strong cash reserves who want certainty about the next home and can sell within six months.
How long does it take to sell an HDB and buy a condo?
About three to four months end to end if you line them up. The HDB resale completes about eight weeks after HDB accepts the application, and a resale condo usually completes 10 to 12 weeks after you exercise the option.
Can I avoid ABSD when upgrading from HDB to a condo?
Yes, if you sell first or arrange for the flat's sale to complete before you buy. If you buy first, Singapore Citizen married couples can claim the 20% ABSD back by selling the flat within six months of buying a completed condo, or of a new launch's TOP or CSC, whichever is earlier.
Where do we stay if we sell our HDB first?
HDB may approve a temporary extension of stay after your sale completes. Many families also rent short-term or stay with family. Timing both transactions together can avoid the gap altogether.
What this means for you
The order you sell and buy in can change what you can afford by more than $1.6 million, as it did in our example, and decides whether you pay 20% ABSD. Decide it before your flat goes on the market, not after you fall for a condo.
If you'd like us to map the order, timeline and numbers for your family, we can plan your upgrade with you, step by step.
