Quick Answer :
The hybrid method lets HDB upgraders buy and sell concurrently. You shortlist condos while your HDB is on the market, but you only exercise your condo's Option to Purchase after your HDB sale OTP is exercised. Get the timing right and you avoid ABSD completely, and you skip the rental gap most upgraders are bracing for.
Introduction
Do you sell your HDB first or buy your condo first? Both have real downsides. Sell first and you're looking at one to six months in a rental, possibly moving twice. Buy first and you're paying ABSD on the condo because you will legally own two properties, on top of a smaller second bank loan assuming outstanding bank loan for your HDB flat. Most upgraders think those are the only two options. They're not. I'm Dennis, a fixed fee property agent with HomeUp in Singapore that charges $1,999 to sell an HDB flat instead of the usual 2% commission. On a $700,000 flat, that's $1,999 versus roughly $14,000 in agent fees. I've walked enough upgraders through this exact transition to know the hybrid method works when you sequence it right: list your HDB and shortlist condos at the same time, then exercise your two OTPs in the correct order. It's not an easy path. It demands precise timing. But it's the cleanest way through, and here's exactly how it works.
What Is the Hybrid Method for Upgrading from HDB to Condo?
The hybrid method means selling your HDB and buying your condo at roughly the same time, instead of strictly sell-first or buy-first. Exercise your condo OTP only after your HDB sale OTP is exercised, and you're never legally holding two residential properties at once. That's what triggers ABSD in the first place.
Approach
ABSD?
Where you live in between
Main risk
Buy condo first
Yes, treated as 2nd property
No gap, move once
ABSD (20% for most SC buyers) plus a reduced loan quantum since the HDB loan is still outstanding
Sell HDB first
No
One to six months of temporary rental, possibly two moves
Renovation delays, missing your preferred unit while you wait
Hybrid, buy and sell concurrently
No, if sequenced correctly
Minimal to no gap
Requires tight timing between two separate transactions
ABSD is calculated on how many residential properties you own at the moment you exercise your OTP, under current IRAS rules. Buy your condo before your HDB sale is finalised and you're treated as owning two properties. That means ABSD on the condo (20% of the purchase price for most Singapore Citizen buyers, more for PRs and foreigners), and a sharply reduced loan to value ratio because your first HDB loan is still outstanding. The hybrid method exists to dodge both at once.
Step 1: List Your HDB and Shortlist Condos at the Same Time
Put your HDB flat on the market and view resale condos in parallel, not one after the other. This is the step that makes most HDB owners uneasy. It feels backwards to be touring condos before you've found a buyer.
That discomfort is normal, so let me say this plainly: you're not committing to anything yet. Think of it as the shortlisting phase. No offer goes in on any condo until you've actually received an offer on your HDB unit. Your only job here is to find three to five condos you'd genuinely buy, so when an HDB offer lands, you're choosing from a shortlist you've already vetted, not scrambling to find a unit from scratch.
Step 2: Get Your HDB Buyer to Agree to a Temporary Extension of Stay
For the hybrid method to work, your HDB buyer needs to agree to a temporary extension of stay, subject to HDB’s approval. HDB allows sellers to stay in the flat for up to three months after resale completion, strictly no extensions beyond that.
Not every buyer will agree. Some have already sold their own place and need to move in fast, and a three month extension simply doesn't work for them. So raise it upfront, before anyone views the flat, not after they've already made an offer. Buyers who can't accommodate it should self select out early. That's a better outcome than a deal falling apart at the offer stage.
Step 3: Make Your Condo Offer Only After You've Received an HDB Offer
The moment a buyer gives you an acceptable offer for your HDB flat, you move immediately and put in an offer on the condo you've already shortlisted. This is where Step 1's groundwork pays off.
Precise timing is what keeps you out of ABSD territory, so this is also the step where you want one agent coordinating both transactions, not two agents who never talk to each other. Some upgraders prefer to wait until their HDB buyer has actually exercised the OTP, not just made an offer, before submitting any condo offer. That's more conservative, and I get the logic, but it also eats into the time you're trying to save with the hybrid method in the first place.
Step 4: Exercise Your Condo OTP Only After Your HDB OTP Is Exercised
This is the step that makes or breaks the whole method. Once you've secured an OTP from the condo seller, wait. Your HDB buyer needs to exercise their OTP on your flat before you exercise yours on the condo. IRAS counts your property ownership as of the date you exercise your OTP, not the date you receive an offer or sign an option. Get that sequence wrong and you've paid ABSD for nothing.
If you'll need CPF funds from your HDB sale for the condo purchase, build in a buffer. CPF Board says refunds may take up to 15 working days to be credited before those funds are available again. Plan your condo completion date around that gap, don't fight it. Your condo completion date is flexible too, negotiated between you and the seller, unlike HDB completion dates which HDB sets on its own resale timeline. Give yourself around two months for renovation before you need to move in.
Get these four steps right, in this order, and the HDB to condo move can be genuinely smooth. No ABSD, no rental gap in between.
How HomeUp Approaches This
The hybrid method only works if both sides, your HDB sale and your condo purchase, are being run by someone who can see the whole timeline at once. That's the default way I work with upgraders at HomeUp: one fixed fee, one team coordinating both legs, instead of splitting the sale and purchase across two agents who aren't talking to each other. If you're weighing the hybrid method against a safer sell first approach, talk that through before you list anything. [Book a planning call with HomeUp →] [See how we price selling your HDB →]
Conclusion
The hybrid method isn't the easy path through an HDB to condo upgrade, but if you can manage the coordination, it's the one that skips ABSD and skips the rental gap. The trade off is precision. Both transactions need to be timed against each other, not run on their own. Thinking about your next move? [Book a planning call with HomeUp →] WhatsApp +65 8087 7015.