Backing out of a flat purchase: what it costs at each stage

Most of the cost of walking away from a flat is decided by one thing: how far along you are when you do it. The same decision can cost nothing in one week and thousands of dollars a few weeks later. This guide sets out what HDB says happens at each stage, for both a new BTO flat and a resale flat, and where the published rules stop.

Backing out of a BTO: the cost depends on the stage

HDB's new-flat page describes four points at which an applicant can cancel. Money at risk rises at each one ^[1].

Two more points from the same page. A cancelled application cannot be reinstated, and cancelling after booking also cancels your HDB Flat Eligibility letter. If you decide you want a different town or flat type, that is also a cancellation and a fresh application during an application period, with a $10 admin fee ^[1].

The cost that is not money: non-selection counts

If the sales exercise ends and your queue position is within the supply but you do not book when invited, HDB records a non-selection count ^[1]. The effect depends on who you are:

• First-timer families: one count moves you to the second-timer category for one year, and your ballot chances for Standard flats are set to 0. A second count within the period suspends first-timer priority for another year.
• First-timer singles and second-timer families: no participation in sales exercises for one year.
• HDB waives the count when there are 10 or fewer BTO flats (5 or fewer SBF) to choose from.

For a household that is not sure it will go through with a BTO, this is the cost most worth planning around. It never appears as a charge, but it shapes which applications you can make next.

Not collecting the keys

Not collecting your keys is treated as a cancellation. HDB states that the option fee and 5% of the purchase price are forfeited, and any CPF housing grants already disbursed must be returned with accrued interest ^[2].

Resale: the Option to Purchase clock

A resale purchase starts with an Option to Purchase (OTP). HDB's page says the OTP is legally binding and valid for 21 calendar days, and gives an example: granted on 1 April, it expires on 22 April at 4pm ^[3].

HDB's resale Terms and Conditions add that an application can be withdrawn before HDB accepts it, but administrative and valuation fees already paid are not refunded. After acceptance, HDB cancels a resale only on written confirmation from both buyer and seller, who each pay stamp, conveyancing and other fees. HDB may also cancel at its discretion, and the buyer's HFE letter is cancelled so a new one is needed ^[4]. Giving false information can lead to debarment of up to five years ^[4].

What we could not verify

HDB's pages do not say what happens financially if you exercise the OTP and then back out. We did not find a published statement we could verify, so this guide does not give a figure. The OTP document carries its own Important Notes, and a lawyer can tell you what applies to your case before you exercise.

We also did not use forum reports about what people paid to get out, because those cannot be checked against HDB's rules and often mix up stages.

Questions to answer before you commit

• Which stage am I at, and what is the next stage's cost?
• If I do not book when invited, which sales exercises am I giving up, and for how long?
• Do I have a plan for the option fee, the 5% and the legal fees if my circumstances change after signing?
• If I am buying resale with CPF or a loan, are the Request for Value and Letter of Offer in hand before the OTP runs out?
• Could a change in my household (marriage, a new occupier, citizenship) invalidate my HFE letter midway?