A sub-sale is one of the more confusing transactions in the private property market. Listings may describe a unit as a “sub sale condo singapore” buyers can move into soon, or one that is still a construction site. Either way, the deal works differently from buying a completed resale unit, and the stamp duty and payment mechanics can catch both sides off guard.
This guide explains what a sub-sale is, why Seller’s Stamp Duty (SSD) matters so much, how the progressive payments already made to the developer pass from seller to buyer, and what to check before committing. It is general information, not legal or financial advice. Stamp duty rules and loan limits change, so confirm current figures with IRAS, MAS-regulated banks and your conveyancing lawyer.
What Counts as a Sub-Sale
In Singapore, a sub-sale is the sale of a private residential unit by someone who bought it from the developer, before the project has received its Certificate of Statutory Completion (CSC). The original buyer has not yet completed the purchase from the developer, so they are effectively passing their position under the developer’s sale and purchase agreement to a new buyer.
That timing point is important:
- Before TOP (Temporary Occupation Permit): the building is usually still under construction. The buyer is buying a future home.
- Between TOP and CSC: the unit may already have keys handed over and can be lived in or rented, but legally it is still a sub-sale.
- After CSC: it becomes an ordinary resale transaction.
If you want the detail on those two milestones, see our explainer on TOP and CSC for new condos. This article focuses on the sub-sale transaction itself.
Why Seller’s Stamp Duty Shapes Every Sub-Sale
SSD is a tax on residential property sold within a set holding period after purchase. For a sub-sale seller, the holding period is counted from the date they bought from the developer (generally the date of the option or sale agreement), not from TOP. Because many sub-sales happen within a few years of launch, sellers are often still inside the SSD window.
Key things to understand:
- SSD is payable by the seller, but it affects pricing because sellers need a higher price to break even.
- Rates fall the longer you hold, and drop to zero once the holding period has passed. The government has adjusted the holding period and rates over the years as a cooling measure, so check the current table on the IRAS website rather than relying on older articles.
- SSD is calculated on the higher of the price or market value, so an artificially low price does not reduce it.
For the buyer, SSD is not a direct cost, but it explains why sub-sale prices cluster around the point when SSD ends. Sellers may simply wait out the period, and a listing appearing just before that date may reflect urgent circumstances.
The buyer’s own taxes are Buyer’s Stamp Duty (BSD) and, where it applies, Additional Buyer’s Stamp Duty (ABSD). These are based on the buyer’s profile and the purchase price, just as in any other purchase.
How the Progressive Payments Transfer
New launch condos are usually bought under the Progressive Payment Scheme, where the buyer pays the developer in stages as construction progresses: a booking fee, then instalments tied to milestones such as foundation, structure, roofing, TOP and CSC.
In a sub-sale, the seller has already paid some of these instalments. The broad mechanics are:
- The buyer reimburses what has been paid. The purchase price is split into the amount the seller has already paid the developer (sometimes with their own loan) and the premium or discount agreed between seller and buyer.
- The seller’s loan and CPF are settled. If the seller used a bank loan, it is redeemed from the sale proceeds. If they used CPF savings, the amount used plus accrued interest is refunded to their CPF account, as required by CPF Board rules.
- The buyer takes over the remaining instalments. After completion of the sub-sale, the buyer pays the developer the outstanding stages as construction milestones are reached.
- The developer’s consent is usually required. Developers often charge an administrative fee for processing the transfer. Your lawyer will confirm what the sale agreement requires.
The table below shows how the payment picture differs depending on timing.
| Stage at sub-sale | What the seller has typically paid | What the buyer takes on | Practical note |
|---|---|---|---|
| Early construction | Booking fee plus early instalments | Most of the remaining progressive payments | Longest wait before you can occupy |
| Late construction | A larger share of the price | Remaining milestones up to TOP and CSC | Shorter wait, less construction risk |
| After TOP, before CSC | Most of the price, up to the TOP stage | Final CSC instalment | Unit can be inspected and often occupied |
| After CSC | Full price | Nothing to the developer | No longer a sub-sale; a normal resale |
Financing a Sub-Sale
Banks lend on sub-sales, but buyers should plan carefully:
- Loan-to-value limits apply under MAS rules, based on your existing loans and circumstances. Check the current limits with your bank.
- Cash and CPF upfront. Because a large part of the price may need to be paid at completion of the sub-sale, rather than spread over construction, the cash and CPF you need on day one can be higher than for a fresh new launch purchase.
- Valuation risk. If the bank’s valuation is below the agreed price, the shortfall comes from your cash.
- Interest timing. Unlike a new launch where interest builds up gradually, a sub-sale buyer may start servicing a larger loan immediately.
Get an in-principle approval before you exercise an option, and ask your bank specifically how it treats sub-sale disbursements.
Pros and Cons for Buyers and Sellers
For buyers, a sub-sale can offer:
- a unit in a project that has sold out at the developer level,
- a shorter wait than a fresh launch, especially near TOP,
- the chance to inspect the finished unit if TOP has been obtained, and
- sometimes a choice of stack or floor no longer available from the developer.
The trade-offs include paying above the original launch price, carrying a larger upfront payment, and inheriting any defects period timeline that started at the original handover.
For sellers, a sub-sale lets you exit before completion if your circumstances change, such as relocating, upgrading or facing affordability pressure. The main costs are SSD if you are still inside the holding period, agent commission, legal fees and the developer’s administrative fee.
If you are juggling a sale and a purchase at once, our guide to selling and buying a home at the same time covers bridging and timing issues.
What to Check Before You Sign
Buyers should ask for, and have their lawyer review:
- the original sale and purchase agreement with the developer, including any special conditions,
- a statement of what has been paid and what remains outstanding,
- the developer’s consent requirements and fees,
- whether the seller’s loan can be redeemed cleanly on completion,
- the expected TOP and CSC dates, and the defects liability period if keys have been handed over, and
- for units already tenanted after TOP, the tenancy agreement and deposit arrangements.
It also pays to look beyond the unit itself. Once the development is complete, a management corporation will take over from the developer, and its quality affects your living experience and costs. Our checklist on checking a condo’s management quality helps once the estate is operating.
Sellers should check their SSD position with IRAS, confirm their outstanding loan and CPF refund amount, and get advice on pricing so that a buyer’s bank valuation is realistic.
A sub-sale is not unusual, but it rewards preparation. Understand the SSD clock, know exactly how much has already been paid to the developer, and let a conveyancing lawyer handle the transfer of the developer agreement.
Frequently Asked Questions
Does the buyer pay Seller’s Stamp Duty in a sub-sale? No, SSD is payable by the seller. It still affects pricing, because sellers inside the holding period need a higher price to break even. The buyer pays Buyer’s Stamp Duty and, where it applies, ABSD, so check current rates on the IRAS website.
Why do sub-sale buyers often need more cash and CPF upfront? Because a large part of the price may be due at completion of the sub-sale, instead of being spread over construction as in a fresh launch. If the bank’s valuation falls below the agreed price, the shortfall also comes from your cash.
What happens to the seller’s loan and CPF when a sub-sale completes? A bank loan is redeemed from the sale proceeds, and any CPF savings used, plus accrued interest, are refunded to the seller’s CPF account under CPF Board rules. The buyer then takes over the remaining instalments owed to the developer.
Does the developer have to approve a sub-sale? The developer’s consent is usually required, and developers often charge an administrative fee for processing the transfer. Your conveyancing lawyer will confirm what the sale agreement requires before you commit.
What should I ask for before signing a sub-sale option? Ask to see the original sale and purchase agreement, a statement of what has been paid and what remains, the developer’s consent requirements and fees, and the expected TOP and CSC dates. Get an in-principle loan approval first and have a lawyer review everything.
Official sources: URA