Should you sell first or buy first?
For most owner-occupier trade-ups, selling first is the sounder route: your mortgage application is assessed with no existing loan, the cash is already in hand, and at the negotiating table you have no date you must complete by.
Buying first only makes sense when two things are true at once: you have locked onto a flat with no real substitute (a specific school net, a specific orientation), and you could carry both mortgages for three to six months if the old flat does not sell.
The two routes compared
Assumes an owner-occupier trade-up between two Hong Kong residential properties.
Policy note: since 28 February 2024, Buyer's Stamp Duty and Special Stamp Duty have been abolished and residential ad valorem stamp duty runs on a single scale, so the old trade-up mechanism of paying 15% and claiming a refund after selling within 12 months no longer applies. What still constrains a trade-up buyer is mortgage policy — an existing mortgage generally tightens both the loan-to-value cap and the debt-servicing ratio under HKMA guidelines and individual bank policy — and timing. Confirm the current terms with your lender when you apply.
| Sell first, then buy | Buy first, then sell | |
|---|---|---|
| Cash pressure | Low: the sale proceeds are already in hand | High: two deposits, or short-term financing, at once |
| Mortgage terms | Better: you apply with no existing mortgage | Worse: an existing mortgage tightens the LTV cap and servicing ratio |
| Negotiating position | Strong: cash in hand, no locked deadline | Weak: a buyer on a deadline is the easiest to read |
| Market risk | If prices rise in between, the upgrade costs more | If prices fall in between, you sell for less than expected |
| Where you live | May need one to three months of short-let or family stay | No gap — move straight across |
| Suits | Buyers who prioritise price and mortgage terms and can bridge the gap | Buyers already locked onto one specific flat, with ample cash |
Stamp duty: the old refund route has gone
Before 28 February 2024, a trade-up buyer who bought before selling paid ad valorem stamp duty at the higher 15% rate and then claimed a refund after disposing of the original property within the prescribed period.
Since that date, Buyer's Stamp Duty and Special Stamp Duty are abolished and residential ad valorem stamp duty runs on a single scale, so the pay-high-then-refund process no longer exists. You simply pay the duty for your price band.
In other words, the deciding factor has moved from tax to mortgage capacity and cash flow — which is exactly what buyers working from pre-2024 advice get wrong.
How an existing property affects your mortgage
If you still hold a mortgaged residential property when you apply, banks generally assess you on tighter terms: a lower loan-to-value cap than a first-time buyer, a stricter debt-servicing ratio counting both payments, and the stressed-rate test on top.
The exact figures follow the prevailing HKMA guidelines and each bank's policy, and they vary enough that getting approval in principle before you make an offer is far more effective than fixing it afterwards.
A common alternative is transferring one spouse's share so that the other regains first-time-buyer status. It involves stamp duty, refinancing and family arrangements — take legal and banking advice first rather than assuming it saves money.
Bridging: some banks offer short-term facilities so you can fund the new deposit before the old sale completes. Costs and conditions vary widely, so count the interest and fees in the total cost of trading up.
Trade-up timeline and bridging the gap
Weeks 1–4: get three valuations on your existing flat (read bank valuations and agency appraisals separately), compile recent transactions in the same estate, and set your minimum acceptable sale price.
Weeks 4–10: list the old flat and start viewing without offering. You are gathering market information at this stage, not chasing a price.
After signing the provisional agreement on your sale: completion usually follows in 6–8 weeks. Make your purchase offer within that window and set the purchase completion one to two weeks after the sale completes.
The gap: if the dates cannot be aligned, a one to three month short-let is normal. Budget HK$30,000–80,000 for rent plus the double move and storage.
Practical point: the completion date in your sale agreement is your negotiating deadline on the purchase. Set it tight and you will take the seller's price. Build in two weeks of slack and your position changes entirely.
Negotiating as a trade-up buyer
The classic error is volunteering to the agent that your own sale has completed and you must move by a certain month. Say it once and your deadline becomes their leverage.
Instead, keep your timing to yourself and argue only from verifiable facts: recent transactions in the same estate, the bank's valuation level, and the flat's own weaknesses — orientation, floor, upcoming building works.
Also worth remembering: the money you save by negotiating on the buying side is as real as the money you gain on the selling side, but different in kind. Your sale price is set by the market and your listing strategy; your purchase price is set by negotiation — and negotiation can be delegated.
We act on the buyer's side only. Your existing agent continues to handle viewings, the provisional agreement and completion; we concentrate on getting the price down. Our fee is (original price − agreed price) ÷ 2, payable on the sale and purchase agreement.
FAQ
Is it better to sell first or buy first in Hong Kong?+
For most owner-occupier trade-ups, sell first: your mortgage is assessed without an existing loan, the cash is in hand, and you negotiate with no completion deadline. Buying first only makes sense if the target flat has no substitute and you can carry both mortgages for several months.
Can trade-up buyers still claim a stamp-duty refund?+
No, and there is nothing to refund. Since 28 February 2024, Buyer's Stamp Duty and Special Stamp Duty have been abolished and residential ad valorem stamp duty runs on one scale, so the old pay-15%-then-refund route has ended. You pay the duty for your price band.
What changes if I already have a mortgage?+
Typically a lower loan-to-value cap than a first-time buyer, a stricter debt-servicing ratio counting both payments, and the stressed-rate test. Exact numbers follow current HKMA guidelines and bank policy, so get approval in principle before offering.
Does transferring a spouse's share save tax?+
It can in some family situations, but it involves stamp duty, refinancing and legal work and is not automatically cheaper. Price the whole exercise with a solicitor and your bank before comparing it with buying directly.
Where do you live during a trade-up?+
If completion dates cannot be aligned, a one to three month short-let is normal — budget HK$30,000–80,000 including the double move and storage. Building one to two weeks of slack into your sale agreement cuts both that cost and the time pressure.