Most upgrade plans fail on order, not on money. Sell too late and you pay Additional Buyer's Stamp Duty upfront on the new home. Sell too early and you rent for years while the project is built. Start by knowing how long each leg takes. A well-run HDB sale completes in roughly 4 to 5 months. A new launch bought off-plan takes 3 to 4 years before you get the keys. Everything else in this guide follows from that gap.
How long does the HDB sale take, step by step?
Do one thing before anything else. Register an Intent to Sell on the HDB Resale Portal, at least 7 days before you give anyone an Option to Purchase. HDB will not recognise an option granted inside that window. From there, five milestones follow, and each has a hard deadline.
Grant the Option to Purchase
You sign the option and hand it to the buyer. They pay an option fee of up to $1,000 to lock in the price. Check one thing here: the buyer's HDB Flat Eligibility letter must be valid. HDB requires it before any option is granted.
Buyer exercises the OTP
Within 21 days the buyer returns the signed option and pays the rest of the deposit. The whole deposit is capped at $5,000 on an HDB resale. The deal is now binding on both sides. That cap matters for your planning. It means almost all your money arrives at completion, so do not count on the deposit to fund the early payments on your new home.
HDB Resale Portal submission
Either side may submit their half of the resale application first. Once one submits, the other has 7 calendar days to follow. Miss it and the application lapses. Both sides start again, and pay the fees again. Track both dates yourself. Nobody tells you the clock has started.
HDB acceptance and processing
HDB checks eligibility and documents. That takes up to 28 working days. Note when the next clock starts: the 8-week processing period runs from the date of the acceptance letter, not from your application. During those weeks both sides sign documents and pay fees on the My Flat Dashboard. Approval follows once both are done.
Completion appointment
HDB sets the completion date once all signatures and payments are in order. Read the acceptance letter carefully: the date on it is the earliest possible date, not a fixed one. Both sides can agree a later date through MyRequest@HDB. On the day, you hand over the keys and receive your money.
How much of the sale price do you actually get?
The sale price is not what you walk away with. The part that catches first-time sellers out is where the money goes. A large slice returns to your CPF account, not your bank account. Here is a $550,000 sale, worked line by line. Your own figures will differ, but the structure will not.
| Item | Amount | Goes to |
|---|---|---|
| Sale price | $550,000 | — |
| Less: outstanding HDB loan | − $80,000 | HDB / bank |
| Less: CPF principal refund | − $180,000 | Your CPF OA |
| Less: CPF accrued interest (2.5% p.a.) | − $25,000 | Your CPF OA |
| Less: agent commission (~2%) | − $11,000 | Fees |
| Less: legal & admin fees | − $3,000 | Fees |
| Less: other costs (misc. deductions) | − $5,000 | Fees |
| Net cash proceeds | $246,000 | Your bank account |
| CPF OA balance restored | $205,000 | Your CPF OA |
Read the last two rows together. Only $246,000 lands in the bank. But the real pot for the next purchase is $451,000: that cash plus $205,000 of refunded CPF. The CPF refund is not lost money. It is deposit money that can only be spent on the next property.
What budget do those proceeds actually buy?
Two separate limits decide what you can buy, and the lower one always wins.
The loan limit comes from TDSR. All your monthly debt repayments must fit inside 55% of your income before tax and CPF, tested at 4% interest. Our TDSR guide works through it.
The deposit limit comes from the loan-to-value rule. On a first home loan the bank lends at most 75% of the price. So your cash and CPF must cover the other 25%, before stamp duty.
Carry on with the same household. They earn $12,000 a month and have no other debt.
Here the deposit limit bites first. $451,000 divided by 25% comes to about $1.8 million. The $1.35 million loan that implies passes the income test with a little room spare. One catch. Buyer's Stamp Duty on a $1.8 million purchase is about $47,600, and legal fees come out of the same pot. So set your working budget a little below the theoretical maximum.
What does the monthly payment look like?
On a $1.35 million loan over 30 years, the instalment is roughly $4,724 a month at a 1.6% rate. Packages we track in mid-2026 start from 1.35%. See our current mortgage rates.
The bank does not size the loan at that rate, though. It uses 4%, where the same loan costs about $6,445 a month. That sits just inside the $6,600 ceiling. The gap is deliberate breathing room. If rates climb toward 4%, this household is stretched but not broken. And on a new launch the instalment climbs with construction rather than starting at full size. Our companion guide, Buying a new launch condo, maps every stage.
Should you sell first or buy first?
| Factor | Sell first, then buy | Buy first, then sell |
|---|---|---|
| ABSD | None — no property owned at purchase | Payable upfront at the second-property rate; remission possible for eligible married couples selling the first home within the stipulated window (for BUC, within 6 months of TOP/CSC) |
| Loan assessment | Clean TDSR — no existing mortgage counted | Existing mortgage counts as debt; loan quantum usually falls sharply |
| Downpayment funding | Sale proceeds and CPF refund available before the 25% is due | Must fund 25% + BSD + ABSD without sale proceeds |
| Housing gap | Interim rental (or family) for 2–4 years until TOP; up to 3 months' extension of stay negotiable with the buyer | None — move only when the new home is ready |
| Best suited to | Most upgraders buying off-plan new launches | Households with substantial spare cash/CPF who value certainty of housing over cost |
So which order should you choose?
For a typical HDB household buying an unfinished new launch, sell first is the cleaner order. You pay no Additional Buyer's Stamp Duty. Your loan assessment is clean. And the money is in hand before the 25% falls due. The cost is somewhere to live in between, which the small early instalments help absorb.
The work that decides this happens before you grant the option. Check the block quotas. Map the HDB completion date against the project's payment stages. Confirm your CPF refund and cash. Then test the final instalment at 4%. Upgraders who do that once, on paper, rarely have to improvise later.
Still torn between an unfinished launch and a completed condo? Our new launch versus resale guide prices four years of rent against four years of owning, at the same budget. That comparison settles it for most upgraders.
One note for anyone moving the other way. A private owner buying an HDB resale flat used to wait 15 months. That rule went on 28 July 2026. In its place is a six-month deadline to sell the private property after the flat purchase completes. It flips the order question for downgraders the same way this section frames it for upgraders. We work through what it means in our analysis of the wait-out removal and private prices.
The short version
What to remember
- Time to complete an HDB saleAbout 4 to 5 months from the option
- Time for a new launch to be built3 to 4 years
- Wait before you can grant an option7 days after Intent to Sell
- Maximum deposit you can collect$5,000, so the rest comes at completion
- Cash from a $550,000 sale in our example$246,000
- Refunded into CPF on top of that$205,000
- Total pot for the next purchase$451,000
- Budget that supportsAbout $1.8 million
- Better order for most upgradersSell first, then buy
So what should you do with this? Pull your CPF property statement before you list the flat. It tells you how much of the sale price goes back to CPF rather than to your bank, and that single figure sets your real budget. Then decide where you will live for the three to four years of construction, and price it. Rent is the true cost of selling first, and it belongs in the comparison. Our affordability calculator turns your income and proceeds into a maximum price, and the budget matcher shows which launches actually fit it.
Frequently asked questions
How long does an HDB resale take end to end?
About four to five months from the option. The buyer has up to 21 days to exercise it. HDB takes up to 28 working days to accept the application. Then roughly 8 weeks run to the completion appointment. Add the 7-day Intent to Sell period before any option is granted.
Can I buy the new launch before selling?
Yes, but two things change. You pay Additional Buyer's Stamp Duty at the second-property rate upfront. And your existing mortgage counts as debt, so your loan usually shrinks. Married couples with at least one citizen can claim that tax back by selling the first home within the allowed window. On a home still being built, that window is six months from completion.
What happens to my CPF when the flat is sold?
The CPF you used, plus interest at 2.5% a year, is taken out of the sale proceeds and returned to your Ordinary Account. You do not receive it as cash. But you can use it straight away as deposit money on the next purchase.
Why is the HDB deposit capped at $5,000?
HDB sets that cap on the whole deposit: an option fee of up to $1,000, plus the balance when the buyer exercises. In practice it means nearly all your money arrives at completion. Plan the early payments on your new home around that.
What is the 7-day portal rule?
Once one side submits their half of the resale application, the other has 7 calendar days to submit theirs. Miss the deadline and the application lapses. The fees are lost, and both sides start again.
Where do we live while the new launch is built?
Most upgraders who sell first rent, or stay with family, for the two to four years until the keys are ready. You can negotiate up to three extra months in the sold flat with your buyer. That bridges the handover, not the construction.
Is a resale levy payable?
Not when you move from an HDB flat to a private condo. The resale levy applies if you buy a second subsidised flat, or a new executive condominium from a developer.
How is my budget worked out, in one line?
Take the lower of two figures. One: your maximum loan under the income test, divided by 75%. Two: your available cash and CPF, divided by 25%. Stamp duty comes out of the same pot, so leave room for it.
Why do the block quotas matter to me as a seller?
Every block has limits on how many households of each ethnic group, and how many permanent-resident households, may live there. If your buyer's profile is already at quota, HDB rejects the application outright. Check before you grant the option and you avoid losing weeks.
Update history
- Plain-English rewrite for first-read clarity. Added a "short version" summary, shortened the title and meta description, and explained the block quota and CPF refund rules in full at first mention. No figures, deadlines or rules changed.
- Guide published. Proceeds waterfall and budget example at $550,000 sale / $12,000 household income; TDSR at 55% with 4% stress rate; LTV at 75%.
Methodology & sources. Milestones and deadlines follow HDB's published resale procedures and Resale Portal rules. CPF refund mechanics from CPF Board rules. Loan computations use the MAS TDSR framework (55% threshold, 4% medium-term stress rate) and prevailing LTV limits. Stamp duty from IRAS published rates.
Disclaimer. All figures are illustrative samples, not projections of any actual household. Nothing on this page is financial, legal or property advice. Timelines are indicative and subject to HDB processing and individual circumstances. Verify against HDB, CPF Board, IRAS and your bank, and seek professional advice for your own situation.
Talk it through with an advisor
Our research tells you what the data says. If you want to work through what it means for your own situation — budget, ABSD position, timing an HDB sale, or comparing launches against resale options — you can request a one-to-one consultation.
- No obligation. The first conversation is about your goals.
- Affordability and stamp duty worked out on your actual numbers.
- Launch and tender alerts for the projects you shortlist.
Disclosure: advisory consultations are provided by Jamus Lee (CEA Reg. No. R065771E, ERA Realty Network Pte Ltd, Licence No. L3002382K), the publisher of PropertyInsider.sg, via JamusProperty.com. This is a separate service from our editorial research and has no influence over what we publish. See our editorial policy. Submitting this form shares your details with the advisory practice; see our privacy policy.