Should I sell my flat before buying the next one?

Every HDB owner planning an upgrade to private property runs into the same sequencing question, and the honest answer is that the three paths trade different costs for different certainties, not one clean winner.

Path one: sell your HDB first, then buy

Once your HDB sale completes, you own no residential property, so your next purchase is treated as a first property: 0% Additional Buyer Stamp Duty. The tradeoff is a housing gap between HDB completion and your new purchase completing, which usually means staying with family, renting short term, or using a bridging loan to close the gap.

Path two: buy a resale condo first, sell your HDB within 6 months

Buying while you still own your HDB is technically a second property purchase, so 20% Additional Buyer Stamp Duty applies upfront. Under the ABSD Married Couple Remission, if both spouses are named on the new property and the HDB sale completes within 6 months of the new property's completion, the full 20% is refunded. The 6 month clock is tight against the HDB resale process, which alone typically takes 8 to 12 weeks once you find a buyer.

Path three: a new launch resets the clock

Booking a new launch condo starts the 6 month ABSD remission clock only from Temporary Occupation Permit, typically 3 to 4 years out. You continue living in your HDB during construction and can sell it at a time of your choosing within that window, before the new unit completes.

What actually decides which path fits

The deciding factor is usually whether you have somewhere to stay during a gap, not the headline numbers, since the friction cost of a rental gap and the friction cost of an ABSD float are often close to each other in dollar terms. If you have family accommodation or flexibility, selling first is the simplest path. If you need housing continuity without interruption, a new launch removes the gap question entirely.

Frequently asked questions

Can I buy a condo before selling my HDB flat?

Yes, but you pay 20% Additional Buyer Stamp Duty upfront as a second property purchase. It is refundable under the ABSD Married Couple Remission if both spouses are named on the new property and your HDB sale completes within 6 months of the new property's completion.

Does a new launch condo avoid the ABSD timing pressure?

It relaxes it. The 6 month ABSD remission clock only starts at Temporary Occupation Permit for a new launch, typically 3 to 4 years from booking, so you can continue living in your HDB and sell it at a time of your choosing within that window.

Winfred Quek is an Associate Marketing Consultant at Crestbrick Pte Ltd (CEA Licence No. L31010886H). CEA R073319H. This page is for general information only and does not constitute financial, investment, or legal advice. Rates and rules reflect the position as at 5 Aug 2026; verify current figures with IRAS, HDB, or MAS before making any decision.