Buying an HDB resale flat is not complete when the seller gives you an Option to Purchase (OTP). Before granting the OTP, the seller must have registered an Intent to Sell for at least seven days and the buyer must hold a valid HDB Flat Eligibility (HFE) letter. After the OTP is granted, the buyer generally has a 21-calendar-day option period to decide whether to exercise it; the HDB form standardises the expiry at 4 pm on the expiry date. The first payment, called the Option Fee, is negotiated from S$1 to S$1,000. Read HDB’s official resale OTP guide before signing or transferring any money.
If the buyer uses CPF or a housing loan, a Request for Value is normally required by the next working day after the seller grants the OTP. The HDB fee is S$120 including GST, and the valuation outcome is typically available within about ten working days. The buyer must wait for that outcome before exercising the OTP. When using a bank housing loan, the bank’s Letter of Offer must be issued before the OTP is exercised. The Option Exercise Fee and initial Option Fee together form a deposit capped at S$5,000. These amounts and dates are separate from the resale price and the buyer’s housing grant.
Quick process: Seller registers Intent to Sell; buyer secures HFE; both agree the resale price and execute the OTP correctly; buyer makes Request for Value where required and confirms financing; buyer exercises or lets the OTP lapse; both parties submit their respective HDB resale application sections within the timeframe agreed in the OTP and within seven calendar days of each other; they endorse documents and pay fees; HDB accepts and later approves the case; completion is typically around eight weeks after HDB accepts the resale application. Use HDB’s resale process overview, not a seller’s unofficial timetable, for the precise next step.
HDB resale milestones: which step legally changes what?
The HDB process contains more than one countdown. The first payment does not transfer ownership, and HDB accepting documents is not the same as approving or completing the transaction.
| Milestone | What happens | What to check |
|---|---|---|
| Intent to Sell | Seller checks eligibility and waits at least seven days before granting OTP | Valid for 12 months under HDB rules |
| HFE letter | Buyer obtains official eligibility, grants and HDB loan assessment | Must be valid when OTP granted and application submitted |
| OTP granted | Seller offers flat to buyer for stated option period | Negotiated S$1–S$1,000 Option Fee |
| Request for Value | Buyer establishes valuation basis for CPF / loan | S$120; by next working day after OTP; outcome before exercise |
| OTP exercised | Buyer signs acceptance and pays Exercise Fee | Combined option payments not above S$5,000 |
| Resale application | Buyer and seller submit separately | Second portion within seven calendar days of first |
| HDB acceptance versus approval | HDB receives complete case then examines eligibility and documents | Acceptance alone is not approval |
| Completion | Ownership and financial settlement finalised | Typically about eight weeks after HDB acceptance |
69 HDB resale terms you need before buying or selling
Each term identifies a real action, document, cost or legal consequence. Read the last column before committing money.
| Term | Meaning | Practical check |
|---|---|---|
| HDB | Housing & Development Board | Follow current resale rules |
| Resale flat | Previously owned HDB flat sold between qualifying parties | Check flat eligibility |
| Flat Portal | HDB’s housing-services entry | Use genuine Singpass access |
| My Flat Dashboard | Online area showing transaction tasks and status | Check deadlines here |
| Intent to Sell | Seller’s required advance registration | Wait seven days before OTP |
| Seven-day wait | Minimum period seller’s Intent to Sell must exist | Do not grant OTP early |
| 12-month validity | Duration of registered Intent to Sell | Re-register after expiry |
| HFE | HDB Flat Eligibility | Buyer obtains before OTP |
| HFE letter | Official eligibility, grant and loan assessment | Check dates and applicant details |
| Resale listing | Property advertised for resale | Verify seller and material facts |
| Resale price | Price mutually agreed by buyer and seller | Different from official value |
| OTP | Option to Purchase | HDB’s prescribed resale option document |
| Option Date | Date seller grants the OTP | Starts 21-day clock |
| Option period | Time buyer has to decide on purchase | 21 calendar days |
| Option Expiry Date | End of buyer’s option to exercise | Standardised 4 pm expiry |
| Calendar day | All days including weekends and public holidays | Applies to option and application gaps |
| Working day | Business day used for Request for Value deadline | Different from calendar day |
| Option Fee | Amount paid when OTP granted | S$1–S$1,000 |
| Exercise Fee | Amount paid when buyer accepts option | Combined deposit capped at S$5,000 |
| Deposit | Option Fee plus Option Exercise Fee | Not an extra payment above those two |
| OTP acceptance | Buyer signs and returns prescribed acceptance | Must reach seller before expiry |
| OTP forfeiture | Loss of Option Fee when buyer lets option expire | Seller may keep fee |
| Sellers’ signatures | Owners must sign prescribed OTP section | Verify each owner’s consent |
| Buyers’ signatures | All buyers sign acceptance | Match HFE and OTP identities |
| OTP serial number | Identifier for particular HDB OTP | Match both application portions |
| Clause 12 | OTP clause recording agreed resale application timeframe | Both parties must meet it |
| Request for Value (RFV) | HDB valuation request for financing and CPF | Required except qualifying all-cash case |
| RFV fee | Processing fee for Request for Value | S$120 including GST |
| RFV deadline | Next working day after granting OTP | Do not miss when using CPF/loan |
| Valuer | Professional appointed if HDB needs valuation visit | Seller may need to allow inspection |
| Valuation outcome | HDB value used as CPF/loan basis | Must arrive before option exercise |
| Valuation validity | RFV outcome remains usable for specified period | Three months for filing complete application |
| Cash-only purchase | Purchase using no CPF and no housing loan | RFV not required |
| CPF housing funds | Permitted CPF Ordinary Account money for purchase | Subject to lease and financing rules |
| HDB housing loan | Loan offered by HDB when eligible | HFE shows outcome |
| Financial institution loan | Bank or other eligible lender housing finance | Requires bank LO before acceptance |
| IPA | In-Principle Approval | Not same as final Letter of Offer |
| LO | Letter of Offer | Bank’s formal loan offer |
| Loan-to-value | Limit on finance relative to assessed value | Different from purchase price |
| COV | Cash-over-valuation | Price above value requiring cash funding |
| Resale application | Formal submission of transaction to HDB | Both buyer and seller sections needed |
| Buyer portion | Buyer’s submission and supporting documents | Must agree with seller’s fields |
| Seller portion | Seller’s submission and supporting documents | Must be lodged within seven days of other |
| Seven-calendar-day gap | Maximum time after first party submits for second party to complete | Failure can lapse transaction application |
| Complete application | Both signed portions plus required documents received | Not merely first party’s acknowledgment |
| Application lapse | Incomplete application ends under HDB rules | Can lose filing fee |
| Application acceptance | HDB processes a valid lodged case | Not final resale approval |
| Resale approval | HDB’s written permission for sale transaction | Needed before completion |
| Resale completion | Final settlement and transfer of flat | About eight weeks after accepted application |
| Resale application fee | HDB administrative fee due from each party | Different from RFV fee |
| EIP | Ethnic Integration Policy | May constrain the eligible buyers at application |
| SPR Quota | PR quota under housing integration rules | Check with seller’s block |
| MOP | Minimum Occupation Period | Seller usually must meet eligibility |
| Ownership record | Registered names holding the flat | Check against OTP and HDB |
| Joint tenancy | Form of co-ownership with survivorship | Different from tenancy-in-common |
| Tenancy-in-common | Co-ownership with specific shares | Specify shares in HDB application |
| CPF housing grant | Eligibility-based CPF support for buyers | Not a free cash transfer to seller |
| BSD | Buyer’s Stamp Duty | Separate tax due |
| ABSD | Additional Buyer’s Stamp Duty | Depends on property and buyer profile |
| Temporary extension of stay | Seller may remain for up to three months with agreement and approval | Not automatic after completion |
| Option money receipt | Evidence of fee paid | Use verifiable payment method |
| Conveyancing | Legal work settling the transfer | Keep completion and tax records |
| Power of Attorney | Legal authorisation for an agent to act | Not interchangeable with property agent’s commission |
| Agent commission | Negotiated payment to licensed estate agency | Not a government resale fee |
| Resale checklist | Written list of each party’s obligations and dates | Set separate reminders |
| Registered resale flat seller | Owner eligible to give OTP | Verify actual identity |
| Resale buyer | Applicant eligible to purchase flat | Confirm HFE |
| Cancellation | Process ending the resale application | May involve costs and legal consequences |
| Completion date | Date final transfer arranged | Do not book move based on unconfirmed estimate |
Before any OTP: seller Intent to Sell and buyer HFE
Resale preparation begins earlier than the apartment viewing. HDB requires the seller to register an Intent to Sell through My Flat Dashboard and maintain it for at least seven days before granting an OTP. HDB’s confirmation shows the earliest date the seller may grant an option. The seller can also check the Ethnic Integration Policy and Singapore Permanent Resident quota for the block, past resale prices and an estimated net proceeds calculation. These are not all final guarantees: eligibility must continue to be met until completion.
Buyers need a valid HFE letter to be granted an OTP. The letter sets out HDB’s assessment of eligibility to buy, CPF housing grant amounts and possible HDB loan eligibility. A person may be eligible to buy but not qualify for all grants or for an HDB loan. This matters because the price agreed with a seller and the financing a family can sustain are separate decisions.
Before paying a property agent or seller, verify the seller’s legal name against the transaction documents and understand who receives option money. HDB’s resale process can be managed personally or with a registered agent for a negotiated fee. The agent’s marketing material cannot replace the HFE or Intent to Sell.
The Option Fee: what the buyer pays first
Once the buyer and seller agree on a price, the seller fills in the prescribed HDB OTP and grants it after receiving the negotiated Option Fee, which must be between S$1 and S$1,000. The buyer has not yet exercised the option at this point. During the 21-calendar-day option period, the seller cannot grant a second option to another buyer for the same property.
The number written as the Option Date starts the option clock. For example, HDB’s own guide says an OTP granted on 1 April expires on 22 April at 4 pm. Public holidays and weekends remain included in that counting. A person treating 21 days as 21 working days may miss the option and lose the fee.
During the option window, review valuation, financing, renovation budget, lease and grant implications instead of letting a sales conversation rush a legally significant decision. The fee can be forfeited if the buyer chooses not to exercise and the OTP lapses.
Request for Value: why the next working day matters
When CPF funds or a housing loan will be used, HDB requires the buyer to submit the Request for Value through My Flat Dashboard by the next working day after the OTP is granted. Attach page one of the OTP and pay the S$120 processing fee. A wholly cash-funded buyer using neither CPF nor housing loan is exempt from this request.
HDB determines whether an appointed valuer needs to inspect the flat. It says the valuation outcome is typically available in about ten working days. Buyers must wait for that value before exercising the OTP, even though the 21-calendar-day option window is already running. This is one reason to submit quickly instead of putting the request off until the last week.
The value helps establish CPF usage and the reference for housing-loan financing. A flat sold for more than its valuation creates cash-over-valuation, which cannot be assumed to be paid by a higher bank loan or an HDB grant. The RFV result is normally usable for three months for the complete resale application, so coordinate both parties’ submissions.
Exercise the option: what must be signed and paid
After receiving the valuation outcome and confirming finance, the buyer decides whether to exercise the option. To exercise, all buyers sign the Acceptance portion of the OTP, deliver it to the seller or an appropriately authorised recipient, and pay the separately negotiated Option Exercise Fee before the expiry time.
The Option Fee and Option Exercise Fee together constitute the deposit and must not exceed S$5,000. For a hypothetical OTP where the Option Fee is S$1,000, the maximum Exercise Fee would be S$4,000. That does not mean the entire purchase has been financed; the remainder is dealt with under the subsequent resale completion and loan arrangements.
Where a buyer is taking a housing loan from a financial institution, HDB says the bank’s Letter of Offer must have been issued before the buyer signs the OTP Acceptance. An earlier In-Principle Approval is not necessarily the final LO. If the valuation reveals an unaffordable cash shortfall, get qualified advice before deciding to exercise, because the contract has significant legal consequences.
Why two applications have to agree and arrive within seven days
After exercise, the seller and the buyer each submit their respective portion of the resale application and supporting documents to HDB. HDB’s procedure says the second party must submit within seven calendar days of the first party, or the incomplete application lapses and fees are not refunded. Separately, clause 12 of the OTP records when both parties agreed to submit; that agreement must also be honoured unless mutually changed.
The system checks matching information including flat address, resale price, option and exercise fee, OTP serial number and grant date. If a buyer enters a different purchase price or fee amount from the seller, HDB may return an error. Resolve the factual discrepancy from the signed OTP rather than editing figures to force an acceptance.
HDB accepting a complete application is not the same as granting final resale approval. Eligibility, documents, financial arrangements and regulatory quotas still need to be assessed. An acknowledgement therefore should not be used as proof that buyers already own the flat.
Completion and the eight-week planning horizon
After HDB accepts a complete resale application, both parties endorse relevant documents, pay fees and meet HDB’s conditions. The overview places completion at about eight weeks from acceptance, although actual appointments can change. HDB issues a notification with completion arrangements.
Plan property handover, moving dates, utilities and renovation access around the confirmed completion appointment, not just the OTP’s exercise date. A seller who needs extra time in the flat may seek an agreed temporary extension of stay of up to three months, subject to HDB rules and the buyer’s agreement. This is not an automatic right to retain keys after resale completion.
Completion can involve stamp duty, legal costs, loan proceeds, CPF housing grants and a CPF housing refund on the seller’s side. Keep each obligation in a separate line because one side’s approval or payment does not fulfil every other requirement.
How to calculate affordability when price exceeds valuation
Suppose a family negotiates a fictional S$720,000 resale price and HDB’s value comes back S$690,000. The S$30,000 difference is the cash-over-valuation, which generally must be met in cash rather than treated as part of the valuation-based CPF or loan funding. The family also needs to budget for legal fees, taxes and any required downpayment.
This example is deliberately simplified; actual allowable CPF usage, housing grants, loan eligibility and stamp duties depend on the buyer’s circumstances. A household qualifying for a large grant may still lack enough liquid cash for the COV or other obligations. Use the HFE and the lender’s actual offer rather than an agent’s estimate.
A thorough household budget includes both the upfront cash and monthly loan repayment, plus future maintenance, taxes and transport or school costs. The largest approved loan is not necessarily the amount a household should take.
What if the buyer lets the option expire?
An OTP is an option, not a command to buy. If the buyer decides not to proceed within 21 calendar days, the buyer does not sign Acceptance and the OTP expires; HDB says the seller keeps the paid Option Fee. The seller can then grant another OTP to an eligible buyer after the expiry. The Request for Value fee is a separate HDB processing charge and is not necessarily recoverable just because the buyer did not exercise.
This is why it is crucial to check the valuation and financing within the option period. Once the buyer exercises the OTP, the legal situation changes: the parties now have a sale-and-purchase agreement subject to the relevant HDB conditions, and withdrawing is more complicated than simply forfeiting the first option fee.
If a genuine change in the parties’ circumstances affects the transaction, speak to HDB and, where needed, a conveyancing lawyer promptly. Do not conceal a change of owner, buyer, citizenship or household nucleus from the resale application.
A practical checklist for both sides
Seller: check MOP and eligibility, register Intent to Sell at least seven days before granting OTP, verify buyers’ details, negotiate the price, accurately execute the OTP and retain fee records. Buyer: obtain valid HFE, review the flat and lease, agree on price, pay the Option Fee, submit RFV by next working day where required, review value and finance, then decide about exercise by the stated deadline.
Both sides: submit consistent application details within the agreed OTP timeframe and within seven days of one another, monitor My Flat Dashboard, endorse documents, provide additional evidence and attend the final completion when HDB confirms it. Keep copies of OTP, valuation, bank LO and payment confirmations.
These steps explain why HFE, OTP, RFV, resale application, HDB approval and completion are not synonyms. A person who can name the exact stage can ask a more useful question and reduce avoidable errors.
Frequently asked questions
How many days is an HDB resale Option to Purchase valid?
21 calendar days, with a standardised 4 pm expiry on the relevant date under HDB’s OTP rules.
How much is the Option Fee?
A mutually agreed sum from S$1 to S$1,000 paid to the seller when the OTP is granted.
What is the maximum combined option deposit?
The Option Fee plus Option Exercise Fee must not exceed S$5,000.
Do I need an HFE before the seller grants an OTP?
Yes, HDB says a buyer needs a valid HFE letter before the OTP is granted.
How long must the seller’s Intent to Sell exist?
At least seven days before granting the OTP; the Intent to Sell lasts 12 months.
When is Request for Value due?
Normally by the next working day after OTP grant if CPF or a housing loan will be used. HDB charges S$120.
Can I exercise before the valuation result?
No. HDB says wait for the Request for Value outcome before exercising when RFV applies.
Is a bank In-Principle Approval enough before exercising?
For a bank housing loan, HDB requires an issued Letter of Offer before OTP Acceptance.
How quickly do the two resale application portions need to be submitted?
The second must arrive within seven calendar days of the first, and both parties must honour the timeframe agreed in OTP clause 12.
Does HDB accepting the resale application mean I already own the flat?
No. HDB acceptance, approval and completion are different stages.
How long does resale completion take?
HDB generally schedules completion around eight weeks after accepting the resale application, subject to its actual process.
What if I do not exercise the option?
The OTP expires and the seller may keep the paid Option Fee; later stages are not automatically started.
Related eduKateSG Guides
- HDB BTO, Resale Flat and HFE Terms
- HDB Resale Grants, EHG and Family Grants
- HDB Loan TDSR MSR and SORA
- HDB BSD ABSD and SSD
- Vocabulary Knowledge Hub
Official HDB Sources
- HDB: Resale Buying Process
- HDB: Option to Purchase
- HDB: Request for Value
- HDB: Resale Application
- HDB: Intent to Sell
- HDB: Selling a Flat Overview
Reviewed 6 November 2026. This guide helps readers understand HDB resale documents and time limits, not decide a particular transaction’s legality or loan eligibility. Confirm live HDB instructions, valuation and legal advice when needed.