Buying Process · 2026

What is a Sale & Purchase Agreement (S&P)? A buyer's guide

By Winfred Quek · 10-minute read · Last reviewed May 2026

Quick answer: A Sale & Purchase Agreement (S&P) is the binding contract that governs a property sale, setting out the price, the parties, the completion date, and the obligations of buyer and seller. In a resale private property, the Option to Purchase (OTP) often serves as the operative contract once exercised. The S&P becomes central in a new launch, where the developer issues a prescribed-form S&P after you book a unit. For a new launch, the developer must deliver the S&P within roughly three weeks of the OTP date, and stamp duty falls due within 14 days of signing it.

Facts verified: May 2026 · Sources linked below

Key Takeaways

• The S&P is the binding sale contract; the OTP is the option that, once exercised, can itself function as the contract for a resale.
• For a new launch, the developer issues a prescribed-form S&P under housing developer rules, usually within three weeks of booking.
• Stamp duty on the S&P or exercised OTP is due within 14 days of signing if signed in Singapore.
• A resale S&P incorporates the standard Law Society conditions of sale unless varied by the parties.
• Read the completion date, the manner of holding, and any special conditions before you sign anything.

Buyers conflate the OTP and the S&P all the time, and the confusion is understandable because in a Singapore resale they can blur into one another. Let me draw the line clearly, then explain what the S&P actually contains and when it matters most.

How Does the S&P Differ From the OTP?

The Option to Purchase is exactly that, an option. The seller grants you the exclusive right to buy at an agreed price within a stated window, in exchange for an option fee, commonly 1% of the price on a private resale. You are not yet obliged to buy. You decide.

The Sale & Purchase Agreement is the binding contract of sale. Once you and the seller are committed, the S&P is what governs the transaction through to completion.

Here is where the confusion comes from. In a private resale, when you exercise the OTP, the exercised OTP itself often becomes the operative sale contract. There may not be a separate document called an S&P at all, the OTP, once exercised, incorporates by reference the Law Society of Singapore's conditions of sale and effectively serves as the agreement. So in resale, OTP and S&P can be the same instrument at different stages.

In a new launch from a developer, they are clearly distinct. You receive a developer's OTP when you book, then a separate, prescribed-form S&P arrives for you to sign.

Feature	Option to Purchase (OTP)	Sale & Purchase Agreement (S&P)
Nature	An option, a right to buy	A binding contract of sale
Binding on buyer?	No, until exercised	Yes
Resale private property	Granted by seller for ~1% fee	Exercised OTP often serves as the contract
New launch	Issued by developer on booking	Separate prescribed-form document
Stamp duty trigger	On exercising the OTP	On signing the S&P

Indicative for 2026. Confirm the documents and timing applicable to your purchase with your conveyancing lawyer.

What Does the S&P Cover?

Whether it is an exercised resale OTP or a developer's prescribed-form S&P, the agreement sets out the essential terms of the deal. Expect to see:

The parties. Full names and identification of buyer and seller. For joint buyers, this is where the manner of holding, joint tenancy or tenancy in common, is recorded.
The property. The address, the legal title description, and the lot or strata details.
The price. The agreed purchase price and the payment schedule, including the deposit already paid and the balance due at completion.
The completion date. The date legal title transfers and the balance is paid. For a resale this is typically 8 to 12 weeks out.
Conditions of sale. A resale incorporates the Law Society's standard conditions unless varied; a developer S&P uses the prescribed statutory form.
Special conditions. Anything specific, vacant possession versus a sitting tenant, inclusion of fixtures and fittings, or a delayed completion.

For a new launch, the prescribed-form S&P also embeds the Progressive Payment Scheme, the construction milestone payment timetable, and the developer's defects liability obligations.

The Standard Timeline From S&P to Completion

For a resale, once the OTP is exercised the agreement is on foot and the conveyancing process runs to the completion date. The flow looks like this.

Step 1 -- OTP exercised: The buyer signs and returns the OTP with the balance of the deposit, typically taking the total to 5%. The agreement is now binding.

Step 2 -- Stamp duty: Buyer's Stamp Duty and any ABSD are paid within 14 days. According to IRAS, this deadline applies where the document is signed in Singapore.

Step 3 -- Conveyancing: The buyer's lawyer conducts title searches, raises legal requisitions, and lodges a caveat to protect the buyer's interest.

Step 4 -- Loan and CPF: The bank loan is finalised and CPF withdrawal is arranged so funds are in place for completion.

Step 5 -- Completion: On the completion date, the balance is paid, title transfers, and keys change hands.

For a new launch, completion is replaced by the staged journey through the Progressive Payment Scheme to Temporary Occupation Permit and then Certificate of Statutory Completion, a process that runs two to four years.

Before you sign: An S&P is binding. Read the completion date, the manner of holding for joint buyers, and every special condition. Once signed, walking away can mean forfeiting your deposit and, on a developer purchase, may expose you to further liability. Have your conveyancing lawyer review the document.

Do You Need a Lawyer to Handle the S&P?

There is no legal requirement to engage a licensed estate agent to buy property in Singapore, and buyers and sellers may transact directly. A conveyancing lawyer, however, is effectively essential. The bank financing the purchase will require legal representation, and the lawyer handles title searches, requisitions, the caveat, CPF coordination and completion.

According to the CPF Board, where CPF savings are used for a property purchase, the withdrawal is processed through the conveyancing lawyer, who liaises with the CPF Board and the bank. That coordination is one of the core reasons the lawyer's role is not optional in practice.

Winfred's Take

The single line in an S&P that buyers skim past and later regret is the manner of holding. Joint tenancy and tenancy in common are very different, and the choice has consequences for succession, for future restructuring, and for ABSD planning. I always tell joint buyers to decide this deliberately before the document is drawn, not to default to whatever the lawyer's template suggests. It is a five-minute conversation that can save a far harder one later.

Frequently Asked Questions

Is the exercised OTP the same as the S&P in a resale?

Functionally, yes. In a private resale, the exercised OTP incorporates the standard conditions of sale and serves as the binding contract. There is often no separate document titled "Sale & Purchase Agreement".

Can I negotiate the terms of a developer's S&P?

The developer's S&P uses a prescribed statutory form, so the core terms are standardised and not freely negotiable. You should still read it and have your lawyer review it.

What happens if I sign the S&P and then change my mind?

The S&P is binding. Backing out can mean forfeiting your deposit and may expose you to a claim for the seller's or developer's losses. Treat signing as a final commitment.

When is stamp duty due on the S&P?

Within 14 days of signing, where the document is signed in Singapore, per IRAS rules. Pay it on time to avoid penalties.

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