Disclaimer (Block 1): This article is for educational purposes only and is intended to assist CEA-registered property agents in understanding regulatory frameworks. It does not constitute financial, tax, or legal advice. LEVR's calculations are indicative only. Always verify rates and eligibility with your bank, HDB, CPF Board, or a licensed financial advisor before advising clients.
What Is an Option to Purchase?
An Option to Purchase (OTP) is a legally binding contract between a seller and a potential buyer that gives the buyer the exclusive right — but not the obligation — to purchase a property at a specified price within a set period. The OTP is the first formal step in most private residential property transactions in Singapore.
Once the seller grants the OTP and the buyer pays the option fee, the seller is legally bound to sell to that buyer if the buyer chooses to exercise the OTP. The buyer can choose not to exercise — but forfeits the option fee.
OTP for Private Property: Standard Terms
| Term | Standard Practice |
|---|---|
| Option fee | Typically 1% of the purchase price, paid to the seller at the time the OTP is granted. This is not fixed by law — parties may negotiate a different amount, but 1% is the market norm. |
| Option period | Typically 14 calendar days from the date the OTP is granted. The OTP must be exercised (or allowed to lapse) within this window. |
| Exercise fee | Paid by the buyer when exercising the OTP. Together with the option fee, this typically brings the total deposit to 5% or 10% of the purchase price, depending on the agreed terms. The exercise fee is paid to the seller's solicitors. |
| Completion | Typically 8–12 weeks after OTP exercise for a resale private property; for a new launch, the timeline follows the developer schedule and the Housing Developers Rules. |
The OTP Process Step by Step
- Buyer and seller agree on price and terms. The OTP is prepared (typically by the seller's solicitor or the developer, for new launches) and signed by the seller.
- Seller grants OTP; buyer pays the option fee. The seller hands over the signed OTP in exchange for the option fee (typically 1%). From this moment, the seller cannot grant another OTP or sell the property to a third party during the option period.
- Option period runs (typically 14 days). The buyer uses this time to arrange financing, conduct due diligence (caveat search, title check), and confirm their decision. A buyer should not accept an OTP without a bank IPA already in place.
- Buyer exercises the OTP. The buyer signs and returns the OTP to the seller's solicitors along with the exercise fee (bringing the deposit up to the agreed percentage). At this point, both parties are contractually committed to proceed.
- Sale and Purchase Agreement (S&P) is executed. Within 2 weeks of OTP exercise, the formal S&P is signed. The S&P contains the full terms of the transaction.
- Completion (typically 8–12 weeks after exercise). The buyer pays the balance of the purchase price (via CPF, cash, and mortgage drawdown), and ownership is transferred via the lodgment of the transfer instrument with SLA.
What Happens If the Buyer Does Not Exercise?
If the buyer allows the OTP to lapse without exercising, the option fee is forfeited — it is retained by the seller. The seller is then free to sell the property to another buyer. There is no obligation on the buyer to proceed, and no further liability beyond the forfeited option fee.
This is why buyers should only accept an OTP when they are confident they will proceed. A buyer who accepts an OTP speculatively, intending to “see if the loan comes through,” risks losing the option fee if the bank declines the mortgage application.
What Happens If the Seller Refuses to Complete?
Once the buyer exercises the OTP, the contract becomes binding on both parties. If the seller refuses to complete without legal justification, the buyer can:
- Sue for specific performance — a court order compelling the seller to complete the sale.
- Claim damages for the loss of bargain and any associated costs.
- Lodge a caveat on the property to prevent the seller from selling to a third party pending resolution.
OTP vs HDB Resale: Key Differences
HDB resale transactions use a different OTP process:
| Feature | Private Property OTP | HDB Resale OTP |
|---|---|---|
| Option fee | Typically 1% (negotiated) | Capped at $1,000 by HDB |
| Option period | Typically 14 calendar days | 21 calendar days (HDB prescribed) |
| Exercise fee | To bring deposit to 5% or 10% | Capped at $4,000 (total deposit $5,000 max) |
| HDB portal registration | Not applicable | Both buyer and seller must register intent via the HDB Resale Portal before OTP can be granted |
| Eligibility checks | Not required before OTP | HDB eligibility must be confirmed via the portal before the OTP is granted |
Stamp Duty on OTP Exercise
Buyer's Stamp Duty (BSD) and Additional Buyer's Stamp Duty (ABSD) are payable by the buyer within 14 days of OTP exercise (or within 30 days if the document is executed outside Singapore). BSD and ABSD are calculated on the higher of the purchase price or the property's market value:
- BSD: Progressive rates from 1% to 6% depending on the property value.
- ABSD: Based on the buyer's citizenship/residency status and property count at the time of purchase.
Stamp duty is a significant cash outlay that buyers should plan for before exercising the OTP. ABSD for a second property is 20% for a Singapore Citizen — on a $1.5M property, that is $300,000 in addition to BSD.
Key Agent Obligations
- Advise buyers to obtain an IPA before accepting an OTP. A buyer who accepts an OTP without confirmed financing risks forfeiting the option fee if the bank declines the loan.
- Ensure the correct OTP form is used. The Law Society of Singapore publishes standard OTP templates. Non-standard OTPs should be reviewed by the buyer's solicitor before signing.
- Advise buyers to check ABSD and BSD before exercise. Buyers should not exercise an OTP without knowing their full stamp duty liability.
- Do not accept an OTP on a client's behalf without clear written instructions — the client, not the agent, is the contracting party and bears financial consequences.
- Lodge a caveat promptly after OTP exercise. A caveat protects the buyer's interest in the property and prevents the seller from transacting with a third party.
Disclaimer (Block 3): LEVR's calculator outputs are estimates based on inputs provided and current regulatory parameters as known at time of publication. They are not a guarantee of borrowing capacity, stamp duty liability, or CPF eligibility. Regulatory thresholds and rates may change. Always verify with IRAS, your bank, or a licensed financial advisor before making financial decisions.