Option to Purchase Singapore 2026: The 14 Days That Decide Your Purchase

Expert takeaway: The Option to Purchase is the single document that locks your price and starts every deadline in a Singapore property purchase. Private resale, new launch and HDB resale each run on a different clock, and the 14 days after exercising decide whether your stamp duty and loan arrive on time.

The Option to Purchase in Singapore, commonly shortened to OTP, is where a property deal stops being a conversation and becomes a binding commitment. Miss a window or misread which set of rules applies and you can forfeit real money. This guide sets the three tracks side by side: private resale, new launch, and HDB resale through the HDB Resale Portal. All figures below reflect standard 2026 practice and HDB's prescribed rules.

What the Option to Purchase actually does

An OTP is a unilateral contract. In exchange for an option fee, the seller grants you the exclusive right to buy the property at an agreed price within a fixed window. During that window the seller is locked in and cannot sell to anyone else. You, the buyer, keep the choice: exercise the option and the sale becomes binding, or walk away and forfeit the fee you paid.

That asymmetry is the whole point. The option fee is the price of holding the property while you confirm your financing, arrange valuation and read the fine print. Understanding the mechanics matters because the numbers, forms and deadlines differ sharply between the public and private markets, and mixing them up is where buyers lose deposits.

Private resale OTP: 1% option fee and a 14-day clock

For private resale property such as a condominium or landed home, the OTP terms are market convention rather than statute, which means they are negotiable. The standard shape is well established. You pay an option fee of 1% of the purchase price to secure the OTP. You then have a window, commonly 14 days, to exercise. To exercise, you sign the acceptance copy and pay a further sum, conventionally 4%, delivered to the seller's solicitors. The option fee plus exercise fee make up the standard 5% deposit before completion.

The 14-day period can be extended by mutual written agreement, which buyers often request when a bank In-Principle Approval is still pending or their own sale has not completed. There is no legal maximum extension; it is purely a matter of negotiation. Completion conventionally follows around 8 to 12 weeks after exercise.

Here is the money on a $1,600,000 condominium:

On that example, changing your mind before you exercise costs you the $16,000 option fee. That is a far more expensive decision than lapsing on an HDB flat, where the forfeit is capped. If you are still deciding whether a purchase at this budget is realistic, run the numbers through our affordability and loan calculator before you ever put a cheque down, because the option fee is money committed on a deal you must be confident can complete.

New launch OTP: developer forms and a standardised window

Buying a new launch from a developer works on the same grant-then-exercise logic, but the terms are set in stone rather than negotiated. Developers licensed under the Urban Redevelopment Authority must use the standard OTP and Sale and Purchase Agreement forms. You typically place a booking fee of 5% to secure your unit, and part of that is paid on booking, with the balance on exercise of the OTP and signing the S&P Agreement.

The key difference is the walk-away cost. If you decide not to proceed after booking, developers generally refund only a portion of the booking fee, with a quarter of the 5% commonly forfeited. Because new launch units are also bought on the progressive payment scheme, your cash flow after exercise looks nothing like a resale purchase. If you are weighing a Building Under Construction purchase, our progressive payment calculator maps out the staged draws so you know what leaves your account and when. For a full walkthrough of the launch process, see our step-by-step guide to buying a new launch condo, and if you are comparing a specific project, our Hudson Place Residences review shows how price and layout stack up on a current launch.

HDB resale OTP: the prescribed form and the $5,000 cap

The HDB resale OTP is the most rigidly governed of the three, and only HDB's prescribed form is valid. A private-market OTP cannot be used for an HDB resale. The mechanics are fixed by HDB, not by negotiation, and every stage runs through the HDB Resale Portal via Singpass.

The buyer needs a valid HDB Flat Eligibility letter before the seller can grant an OTP, and the seller must have registered an Intent to Sell at least seven days earlier. The option fee is between $1 and $1,000, mutually agreed and never zero. The OTP is valid for 21 calendar days, including weekends and public holidays, expiring at 4pm on the 21st day. When you exercise, you pay an option exercise fee, and here is the cap that matters: the option fee and exercise fee together form the deposit and cannot exceed $5,000. So if you paid the maximum $1,000 to take the option, the most you pay to exercise is $4,000.

One HDB-specific step trips up more DIY buyers than any other. If you are using CPF savings or a housing loan, you or your agent must submit a Request for Value to HDB by the next working day after the OTP date, then wait for the outcome before exercising. If the flat is paid entirely in cash with no CPF and no loan, this step does not apply. Any price above HDB's valuation is cash over valuation, which must be paid in cash and cannot be funded by CPF or a loan. You can confirm the full procedure on the HDB Option to Purchase page and check your CPF position with our CPF accrued interest calculator so the refund on any onward sale does not surprise you later.

The stamp duty deadline hiding inside the OTP

Whichever track you are on, exercising the OTP starts a second clock that catches buyers off guard. Buyer's Stamp Duty, and Additional Buyer's Stamp Duty where it applies, is payable within 14 days of exercising the OTP, not at completion weeks later. CPF Ordinary Account savings can reimburse it, but it must be settled on time.

BSD is charged on a progressive band structure. On the $1,600,000 condo from earlier, the working looks like this:

The common error is stopping at the 4% band and forgetting the 5% band applies to any amount above $1,500,000. Confirm your own figure on the IRAS Buyer's Stamp Duty page, and if a second property is involved, check the IRAS ABSD page before you sign anything. Our full stamp duty guide breaks down both taxes together.

The three mistakes that cost buyers money

First, exercising before your financing is confirmed. A verbal indication or an In-Principle Approval is not enough. For an HDB resale using CPF or a loan, wait for the Request for Value outcome; for a bank loan, have a valid Letter of Offer in hand. Exercise on a hope and a valuation shortfall or a rejected loan can force you to top up in cash or lose your deposit.

Second, missing the exercise deadline. The private 14-day window and the HDB 21-day window are hard stops. The HDB period cannot be extended and expires at 4pm on the final day. If it lapses without exercise, the deal falls through and your fee is forfeited. Diarise the deadline the moment the OTP is granted, and deliver the signed acceptance and payment well before the last hour.

Third, forgetting stamp duty is due 14 days after exercise. Buyers who budget only for the deposit and completion are caught out when the BSD bill lands two weeks in. Line up the cash or CPF before you exercise, not after.

If you are still unsure whether a resale flat, a resale condo or a new launch suits your situation and budget, our buyer profiler maps your profile to the right path before you commit to any OTP.

The OTP is short, standardised and easy to underestimate, yet every deadline in your purchase flows from the day you sign it. Getting the track right, confirming your financing before you exercise, and diarising the stamp duty date are what separate a smooth completion from a forfeited deposit. If you would like a second set of eyes on your specific timeline, financing or the numbers on a flat or condo you are eyeing, reach out to the team at PropertyNet.SG for independent, personalised advice before you commit a single dollar.