When to Sell Your HDB Flat: Before or After BTO Key Collection?
Quick answer: If you own an HDB flat and your BTO is nearing completion, you must dispose of your current flat within 6 months of key collection.
The real decision is whether to sell before or after collecting keys — and if you need the sale proceeds for the purchase, HDB has two schemes that bridge the gap.
| At a glance | What HDB says |
|---|---|
| Disposal deadline | Sell or transfer your existing flat within 6 months of key collection. |
| Funds timing | If sale proceeds are needed for the purchase, plan for funds to be ready by the key appointment. |
| Contra Payment Facility | An additional loan on top of your HDB housing loan, redeemed from your sale proceeds. |
| Temporary Loan Scheme (TLS) | A temporary loan when you take no housing loan, at HDB's non-concessionary rate. |
| Downpayment | Neither scheme covers it. |
| Extension of stay | Stay in your sold flat up to 3 months after completion, with your buyer's consent. |
| Resale levy | Cash at key collection if you sold first; deducted from sale proceeds if you sell after. |
| Typical resale timeline | Roughly 3–6 months from marketing to completion. |
Source: HDB key collection page. As at August 2026.
Table of Contents
What is the 6-month rule for BTO key collection?
HDB’s rule is short and firm: if you own a flat when you collect the keys to your new one, you must dispose of it — by sale or transfer — within 6 months of key collection.
HDB adds a planning note that matters just as much: if you need the proceeds from your sale to pay for the new flat, arrange the sale so the funds are available by your key collection appointment. The rule sets the deadline. Your financing sets the real timeline.
Should you sell before or after collecting your BTO keys?
This is the decision the whole journey turns on, and there is no single right answer — it depends on your cash position, your tolerance for moving twice, and how much time pressure you can accept on the sale.
Selling before key collection puts the money in place first.
Your cash proceeds arrive at resale completion — a cheque at the appointment itself — and HDB arranges the refund to your CPF account within 7–14 working days of the completion appointment; if you engage a private solicitor, your solicitor arranges it.
Build that fortnight into your plan if the purchase depends on the refund.
By key day, your CPF and cash are ready, your loan is smaller, and the resale levy is settled as a single cash payment at the appointment.
The trade-off is housing: there is a gap between handing over your flat and receiving your keys.
An extension of stay can close that gap — the next section shows how.
Selling after key collection means no interim housing and renovation at your own pace.
The trade-offs run the other way: you briefly carry two flats, the 6-month clock is running, and a deadline-driven sale gives you less room to hold out for your price.
The levy is then deducted from your sale proceeds rather than paid in cash.
| Factor | Sell before keys | Sell after keys |
|---|---|---|
| Funds at key collection | Proceeds and CPF refund ready. | Bridged by a scheme or your own funds. |
| Where you live | Gap to cover — extension of stay or interim housing. | Stay put, move once. |
| Time pressure on the sale | You choose the timing. | 6-month clock is running. |
| Resale levy | Cash, lump sum, at the key appointment. | Deducted from sale proceeds; shortfall in cash. |
| Renovation | After you move in. | At your own pace before moving. |
The middle path: sell first, stay on, renovate the new flat
Between “sell before” and “sell after” sits a sequencing play that gives you most of both sides.
Sell your flat with completion timed close to your key collection, and agree a temporary extension of stay with your buyer — up to 3 months in your sold flat after resale completion, with the buyer’s consent.
Your sale proceeds and CPF refund land first, so the funds are ready at the key appointment, often without needing either scheme.
You then collect your keys, renovate the new flat while still living in the old one, and move once — straight into a finished home.
Two cautions keep this honest.
The extension is your buyer’s to grant, not yours to assume, and it needs a proper written arrangement between you.
And the 3-month cap is fixed — if your key collection slips, the extension cannot stretch with it.
The conditions, who pays what during the stay, and the agreement itself are covered in full in our HDB extension of stay guide .
What's the difference between the Contra Payment Facility and the Temporary Loan Scheme?
If you sell after collecting keys — or your completion dates simply don’t line up — HDB has two schemes that let you complete the purchase while your sale is still in progress.
Which one applies depends on one question: are you taking an HDB housing loan for the new flat?
The Contra Payment Facility is for buyers taking an HDB housing loan.
The Temporary Loan Scheme is for buyers taking no housing loan at all — typically those whose proceeds and CPF will pay for the new flat outright.
| Condition | Contra Payment Facility | Temporary Loan Scheme (TLS) |
|---|---|---|
| Who it's for | Buyers eligible for and taking an HDB housing loan. | Buyers taking no housing loan. |
| What it is | An additional loan on top of your HDB housing loan. | A temporary loan, secured as a mortgage on the new flat. |
| Interest rate | Your HDB housing loan rate. | HDB's prevailing non-concessionary rate. |
| Covers your downpayment? | No. | No. |
| Your funds must cover the price using | CPF OA balance + sale proceeds (you may retain up to S$20,000 of the CPF refund) + maximum HDB loan. | CPF OA balance + CPF refund and cash proceeds from the sale. |
| Existing flat's bank loan | Must be fully redeemed first. | Must be fully redeemed first. |
| When you collect keys | On or after approval of your resale application. | After both your resale application and temporary loan are approved. |
| If your funds fall short | Top up the shortfall within the window HDB gives. | Top up by the date HDB gives. |
| How to apply | Submit the request when you apply to sell your flat. | Submit the request when you apply to sell your flat. |
As at August 2026, per HDB's key collection page. Conditions summarised — confirm your own position with HDB before committing.
Two lines in that table deserve a second read. Neither scheme covers the downpayment — that stays with you either way.
And under the Contra Payment Facility, you may keep up to $20,000 of your CPF refund rather than committing all of it; the TLS carries no equivalent line.
When should you start selling your flat?
Work backwards from your estimated key collection date.
An HDB resale sale typically runs 3–6 months from first marketing to legal completion: the buyer has up to 21 calendar days to exercise the Option to Purchase, both parties submit the resale application (the second party within 7 calendar days of the first), HDB accepts a complete application within 28 working days, and completion follows around 8 weeks after acceptance.
Our step-by-step HDB resale process guide walks the full procedure.
In practice, that arithmetic means starting to market the flat roughly 4–6 months before your expected keys if you want funds ready by the appointment — or promptly after key collection if you are using a scheme, since one clean sale cycle uses most of the 6-month window on its own.
Your estimated completion date can move, so build slack rather than aiming the sale at a single week.
What if the sale runs past the 6-month window?
The 6-month disposal requirement is a condition of your purchase, not a guideline.
If your sale genuinely risks overrunning — a weak market, a failed deal late in the process — the practice is to write to HDB before the deadline, setting out why the flat has not sold and attaching proof of your marketing efforts, such as advertisement records and viewing history.
HDB assesses these appeals case by case; approval is not automatic, and a paper trail showing a genuine, sustained effort to sell is what gives an appeal substance.
Do not plan around an extension — plan the sale so you never need one.
How does the resale levy work when you buy a BTO?
A BTO flat is subsidised housing, so if your current flat was also subsidised, a resale levy applies to the new purchase.
The amount is set by the policy prevailing when you sold your first subsidised flat, and HDB informs you of the figure when you book.
The levy cannot be paid with CPF savings or a housing loan.
How you pay it follows your selling decision: dispose of your first flat before key collection and it is a single cash lump sum at the key appointment; sell after key collection and it is deducted from your net sale proceeds, with any shortfall paid in cash.
For how the levy interacts with your cash proceeds and the second HDB loan rules, see our second HDB loan guide .
Buying a resale flat instead? That's a different scheme
Everything on this page covers selling your flat while buying a new flat from HDB.
If your next home is a resale flat bought on the open market, the mechanism is different: the Enhanced Contra Facility, with its own conditions and its own timeline.
Our HDB contra guide covers that route in full.
Common misconceptions
It does not — and this one circulates even in agent answers online. The Temporary Loan Scheme (TLS) is a mortgage-secured loan that helps you complete the purchase while your sale is in progress. HDB states plainly that it does not cover the downpayment, and the same is true of the Contra Payment Facility.
A typical HDB resale runs 3–6 months from marketing to completion. The window fits roughly one clean sale cycle — with little slack for a buyer who backs out, a slow market, or a pricing misjudgment. Treat 6 months as tight, not generous.
The amount is the same; the payment is not. Sell before keys and the resale levy is cash, in full, at the key appointment — it needs to be in your budget as cash. Sell after and it comes out of your sale proceeds instead.
About the author
Rick Long is an Associate Senior Division Director at Huttons Asia.
Through YouHome.sg — Right Property Matters — he shares the frameworks, tools and field experience behind his advisory work, helping Singapore buyers and sellers across HDB, EC and private residential decisions with structured, calm, next-step guidance.
CEA Reg. R026818Z · Huttons Asia · YouHome.sg
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Frequently asked questions
Do I have to sell my HDB flat before collecting my BTO keys?
No. You must dispose of your existing flat within 6 months after key collection. But if you need the sale proceeds to pay for the new flat, HDB advises planning the sale so funds are available by your key collection appointment.
What is the Contra Payment Facility for a BTO flat?
It is an additional loan on top of your HDB housing loan, which you redeem with the net proceeds when your existing flat's sale completes. It reduces your cash outlay and loan size, and lets you collect keys and renovate while the sale is in progress. Interest is charged at your HDB housing loan rate.
Can the Contra Payment Facility or Temporary Loan Scheme pay my downpayment?
No. HDB states that neither scheme covers the downpayment of your flat purchase. The downpayment must come from your own CPF or cash.
When should I start selling my flat before BTO key collection?
A typical HDB resale takes about 3–6 months from marketing to completion. If you want funds ready by your key appointment, most owners need to start marketing roughly 4–6 months before their expected key collection date, with slack built in for delays.
Can I pay the resale levy with CPF?
No. The levy cannot be paid with CPF savings or a housing loan. It is paid in cash at key collection if you disposed of your first subsidised flat beforehand, or deducted from your net sale proceeds if you sell after, with any shortfall in cash.
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