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Understanding the Option to Purchase in Singapore Property Transactions

By Winfred Quek · CEA R073319H · 9 minute read · Last reviewed May 2026

Rates and thresholds change. The current figures are kept in one place: the Singapore property rules reference.

Facts verified: May 2026 · Sources linked below

Before any Singapore property changes hands, there is an Option to Purchase. Whether you are buying a resale condo, a landed home, or an HDB flat, the OTP is the document that transforms an informal agreement to transact into a legally enforceable right. Understanding every clause, deadline, and consequence of the OTP is not optional for any serious buyer; it is the foundation of the entire transaction.

First time buyers often treat the OTP as a formality. Experienced buyers treat it as the moment the deal becomes real and irreversible. The difference in approach explains why some buyers lose 1% option fees unnecessarily, and why some sellers walk away from deals they could have been legally compelled to complete.

Private Resale OTP: The Full Process

HDB Resale OTP: Key Differences

The HDB resale OTP process has additional safeguards and a different sequencing from the private resale process:

• HDB Flat Eligibility (HFE) letter required first: Before a buyer can receive an HDB resale OTP, they must hold a valid HFE letter from HDB confirming eligibility to buy an HDB resale flat, and (if applicable) the CPF grants and HDB loan they qualify for. Without the HFE letter, the transaction cannot proceed.
• Option fee: Negotiated between buyer and seller from as low as $1 to a maximum of $1,000 (HDB caps the option fee at $1,000, unlike private resale where 1% is typical).
• Exercise period: 21 calendar days (vs 14 for private resale).
• Exercise fee: Up to $5,000 (agreed between parties), not the 4% typical for private resale.
• Resale application: After exercising the OTP, buyer and seller submit a joint resale application to HDB. HDB processes and approves the sale; there is no conveyancing solicitor equivalent in HDB resale (HDB handles the legal transfer).
• No cooling period: Unlike some countries, Singapore HDB resale has no statutory cooling off period. Once the OTP is exercised, both parties are bound.

BSD on Exercise: What You Owe IRAS Within 14 Days

Buyer's Stamp Duty is payable on the purchase price (or market value, whichever is higher) within 14 days of exercising the OTP for private property. The BSD formula in 2026:

• First $180,000: 1% = $1,800
• Next $180,000: 2% = $3,600
• Next $640,000: 3% = $19,200
• Remainder above $1,000,000: 4%

Examples: $1.2M purchase → BSD = $1,800 + $3,600 + $19,200 + ($200,000 × 4%) = $32,600. $1.5M purchase → BSD = $1,800 + $3,600 + $19,200 + ($500,000 × 4%) = $44,600. Pay this in cash by the 14 day deadline; for a resale purchase, CPF Board reimburses it from your CPF OA once the sale completes (for a new launch still under construction, CPF OA can pay it directly instead).

The Option Period: What to Do in 14 Days

Once you hold an OTP, the 14 day clock is running. Use the time efficiently:

What Happens If You Don't Exercise?

If you decide not to proceed after receiving an OTP, you simply do not exercise it. The OTP expires at the end of the option period. The seller retains your 1% option fee as compensation for the exclusivity period and the inconvenience of having their property off the market. You cannot recover this fee.

Common reasons buyers let OTPs lapse: financing fell through (bank declined loan), valuation came in lower than purchase price (bank will only lend on the lower figure), buyer discovered a material defect in the property, or personal circumstances changed.

What If Both Parties Want to Cancel After Exercise?

Once an OTP is exercised, it becomes a binding contract (the Sale and Purchase Agreement). Cancellation by mutual consent is possible but legally complex. Both parties must agree, and there will typically be a negotiated settlement on costs and the exercise fee. The buyer usually forfeits the exercise fee (4%) and potentially faces additional liability for the seller's legal costs. Always involve your solicitor before attempting to cancel a completed exercise.

Common OTP Mistakes by Singapore Buyers

• Paying the option fee before securing in principle loan approval: If your bank subsequently declines the loan, you lose the 1% option fee and cannot proceed. Get IPA first, then pay option fee.
• Not checking CPF OA availability for the 4% exercise payment: The 4% exercise payment can come from CPF OA, but CPF Board processing takes 2 to 5 working days. Plan in advance; do not wait until Day 13 to request CPF withdrawal.
• Assuming 14 days means 14 business days: It is 14 calendar days, including weekends and public holidays. A Saturday grant date means the OTP expires on the second Saturday, regardless of intervening holidays.
• Not engaging a lawyer immediately: Some buyers wait until Day 7 or 8 to find a solicitor. With title searches, loan documentation, and exercise paperwork all due before Day 14, this leaves dangerously little time for complications.

What if your loan is not approved before you exercise?

This is the mistake that costs buyers the most, already flagged above as a common OTP mistake and worth restating on its own: if you pay the option fee before your loan is actually approved, and your bank subsequently declines the loan, you lose the 1% option fee and cannot proceed. The fee is not refundable simply because financing fell through afterward.

The fix is sequencing, not paperwork: secure an in principle loan approval first, then pay the option fee once the financing is genuinely there. One clarification worth making plainly: this option fee and OTP process is for private resale and HDB resale property. A Build To Order flat does not use it at all. A BTO purchase runs on HDB's own process, a booking fee followed by signing the Agreement for Lease, a separate track from the OTP described on this page.

Related reading

• Progressive Payment Scheme: New Launch Cash Flow Guide
• CPF OA vs Cash for Downpayment: Which is Better?
• What Income Do You Need to Buy Private Property in Singapore?

Winfred Quek (CEA R073319H) is an Associate Marketing Consultant with Crestbrick Pte Ltd (CEA Licence No. L31010886H) and is not a licensed financial adviser or mortgage broker.

Frequently asked questions

What happens if I decide not to exercise the OTP in Singapore?

If you do not exercise the OTP within the stipulated period (typically 14 days for private resale, 21 days for HDB resale), the OTP expires. The seller keeps the option fee (typically 1% of the purchase price) as compensation. The deal is cancelled and both parties are free to transact with others. You cannot recover the option fee.

Can I get a refund of the OTP fee if the seller backs out?

If the seller refuses to sell after granting an OTP that you have exercised, you have legal recourse, the OTP is a binding contract once exercised. You can seek specific performance (force the sale) or damages through the courts. A properly exercised OTP is a contractual obligation on the seller. If the OTP has not yet been exercised, the seller can theoretically withdraw, though doing so may expose them to claims for any costs you incurred in reliance.

What happens to my option fee if my loan is not approved?

You lose it. The option fee is not refundable if your bank declines your loan after you have already paid it, even though the reason has nothing to do with the seller. Secure an in principle approval before you pay the option fee, not after, so financing risk is settled before your fee is at stake.

Does a BTO flat use an option fee like a resale OTP?

No. The option fee and Option to Purchase process described on this page apply to private resale and HDB resale property. A Build To Order flat is booked differently: you pay a booking fee, typically $500 to $2,000 depending on flat type, then sign the Agreement for Lease. There is no 1% option fee on a BTO purchase.