Sub-sale of Property Singapore 2026: Selling an Uncompleted Unit, SSD Implications, and What Agents Should Know

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 a Sub-sale?

A sub-sale is the sale of an interest in an uncompleted private residential property — that is, a unit in a development that has not yet received its Temporary Occupation Permit (TOP) or Certificate of Statutory Completion (CSC). The original buyer (the "sub-seller") sells their contractual interest in the unit to a new buyer (the "sub-buyer") before the development is completed.

Sub-sales occur in the primary market because some buyers who have purchased new launch units later decide to exit their position before TOP — whether due to changed financial circumstances, changed plans, or an opportunity to realize a profit if the market has moved in their favor since purchase.

How a Sub-sale Works

In a sub-sale, the sub-seller is not selling a completed property with a title that can be transferred immediately. Instead, they are assigning their rights and obligations under the Sale and Purchase Agreement (SPA) with the developer to the sub-buyer. The process involves:

• Review of the original SPA: The sub-seller must check whether the original SPA with the developer permits assignment and whether developer consent is required. Many developer SPAs include clauses restricting assignment or requiring the developer to consent before the buyer can sub-sell.
• Developer consent (if required): If the SPA requires developer consent, the sub-seller must obtain this before proceeding. Developers may charge an administrative fee for processing the consent.
• Deed of assignment: The legal mechanism for a sub-sale is typically a Deed of Assignment — a legal document by which the sub-seller assigns their rights under the SPA to the sub-buyer. This is prepared by the lawyers involved and requires payment of stamp duty.
• Payment structure: The sub-buyer pays the sub-seller for their equity in the unit — the difference between the sub-sale price and the amounts already paid to the developer under the progressive payment schedule, plus any amounts still outstanding. The sub-buyer then steps into the sub-seller's shoes for the remaining progressive payments to the developer.
• Outstanding loans: If the sub-seller has drawn down a bank loan for the progressive payments, this must be discharged or novated as part of the sub-sale. The sub-buyer will take over with their own financing.

Seller's Stamp Duty (SSD) Implications

SSD applies to private residential property sold within 3 years of purchase. Because sub-sales typically occur before TOP — and often within a few years of the original purchase — SSD is frequently payable on sub-sales.

• SSD rates (as at 2026): SSD is charged on the higher of the sale price or market value at the time of sale: 12% if sold within 1 year of purchase, 8% if sold in the second year, and 4% if sold in the third year. No SSD applies after 3 years.
• Date of purchase for SSD purposes: For SSD calculation, the date of purchase is the date the original SPA was executed (not the date of TOP or completion). For a new launch unit purchased in 2023 and sub-sold in 2025, the holding period would be approximately 2 years, attracting the 8% SSD rate.
• SSD is the seller's liability: SSD is payable by the sub-seller, not the sub-buyer. However, parties can negotiate how SSD is factored into the sub-sale price.
• Sub-buyer's stamp duty: The sub-buyer is also liable for BSD and (if applicable) ABSD on the sub-sale transaction. Stamp duty is computed on the purchase price of the sub-sale, not the original developer price.

Pricing a Sub-sale

Sub-sale pricing differs from completed property pricing because the unit does not yet exist as a delivered, habitable product. Factors that affect sub-sale pricing include:

• Original purchase price: The sub-seller typically expects to recover at minimum the amounts already paid under the progressive payment schedule, plus SSD, legal fees, and a profit margin.
• Market movement since launch: If the new launch sold out quickly and subsequent projects in the area have launched at higher prices, the sub-seller may be able to achieve a premium above their original purchase price.
• Remaining progressive payments: The sub-buyer inherits the obligation to make remaining progressive payments to the developer. A unit with significant remaining payments outstanding represents a larger future cash commitment for the sub-buyer.
• Time to TOP: A unit expected to TOP in 6 months is more attractive than one with 3 years remaining. The longer the remaining construction period, the less certain the outcomes and the more capital is tied up before delivery.

Guidance for Property Agents

• Verify the SPA allows assignment: Before the sub-seller agrees to sell or accepts any expression of interest, check the original SPA with the developer to confirm whether assignment is permitted and what conditions apply. Proceeding without checking can expose the sub-seller to breach of contract with the developer.
• Compute SSD early in the advisory process: The sub-seller needs to understand their SSD liability to price the sub-sale correctly. Calculate SSD based on the sub-sale price and the holding period from the date of the original SPA. Do not wait for a buyer to be found before raising the SSD impact with the sub-seller.
• Help buyers understand what they are purchasing: Sub-buyers are purchasing a contractual right to receive a unit upon completion — not a delivered property. Help sub-buyers understand the remaining progressive payment obligations, the expected TOP date, and the construction risk that remains.
• Refer to lawyers early: Sub-sale transactions involve a Deed of Assignment, potential developer consent processes, loan novation or discharge, and stamp duty filings. These are complex transactions where the lawyers play a critical role. Ensure both parties engage their own lawyers early in the process.
• Check sub-buyer stamp duty obligations including ABSD: The sub-buyer is acquiring a residential property and is subject to BSD and ABSD on the sub-sale price. If the sub-buyer already owns other residential property, ABSD will apply. Ensure the sub-buyer has computed their stamp duty costs before committing.

Summary

A sub-sale is the assignment of an interest in an uncompleted private residential property before TOP. The sub-seller assigns their rights under the original SPA to the sub-buyer, who then takes over the remaining progressive payments to the developer. SSD applies if the sub-seller has held the unit for fewer than 3 years, with rates of 12%, 8%, or 4% depending on the holding period. The sub-buyer also pays BSD and ABSD on the sub-sale price. Agents should verify whether the original SPA allows assignment, compute SSD early, help sub-buyers understand what they are acquiring, and refer both parties to lawyers who specialise in sub-sale conveyancing.

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.