Decoupling Calculator
When one co-owner transfers their share to the other, the remaining owner becomes the sole owner, freeing the other to buy a new property without ABSD. See the cash involved, how the buy-out is financed, and how much ABSD decoupling could save.
Estimates only, based on prevailing IRAS stamp duty rates and MAS loan-to-value rules. Reliefs, remissions and your bank's actual assessment are not applied. Decoupling rules change frequently and HDB flats generally cannot be decoupled. Speak to a Cashew advisor before acting.
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Decoupling Private Property in Singapore: What Still Works, and What Is Now Illegal (2026)
Decoupling, or a part sale of one co-owner's share to the other, remains legal in Singapore in 2026 and can help couples manage Additional Buyer's Stamp Duty when purchasing a second property. However, IRAS and the courts now draw a clear line between genuine transfers at market value and contrived arrangements like the 99-to-1 scheme, with enforcement including surcharges and criminal prosecution. Whether decoupling makes financial sense depends on your property equity, CPF accrued interest, the remaining owner's ability to qualify for the full mortgage under TDSR, and whether there is a genuine reason for the transfer beyond tax savings.
Sarah Chen·29 May 2026
The ABSD shortcut that could cost you the property
Nominee arrangements designed to avoid Additional Buyer's Stamp Duty are treated as sham transactions by IRAS, meaning the avoided tax becomes payable with penalties. Worse, courts will not enforce ownership claims built on an illegal purpose, so the real buyer can lose the property entirely to the nominee. Legitimate alternatives like decoupling exist but carry their own stamp duty costs and should be fully priced before assuming they save money.
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How to Decouple a Private Property in Singapore: The Step-by-Step Process
Decoupling a private property in Singapore involves one co-owner transferring their share to the other, leaving a sole owner. The process covers confirming the remaining owner qualifies for the full loan under TDSR, obtaining a market valuation, engaging separate lawyers, restructuring the mortgage, paying Buyer's Stamp Duty on the transferred share, refunding any CPF used, and completing the transfer. Key costs include stamp duty, legal fees, refinancing fees, and potentially significant CPF accrued interest.
Sarah Chen·29 May 2026Good to know
Understanding decoupling
The decoupling calculator shows whether transferring one co-owner's share of a property to the other is worthwhile, comparing the Additional Buyer's Stamp Duty (ABSD) you would save on a second purchase against the costs of decoupling itself. It tells you if the strategy pays off for your situation.
What this calculator does
Decoupling is a strategy where one co-owner (usually a spouse) buys out the other's share of an existing property, leaving one person as sole owner. The freed-up co-owner then counts as owning no property, so they can buy a second home as a "first" purchase and avoid the steep ABSD that would otherwise apply.
But decoupling has its own costs: stamp duty on the transferred share, legal fees, and possible loan refinancing. This calculator compares the ABSD you would save on the next purchase against these costs, producing a net figure that shows whether decoupling makes financial sense.
How decoupling savings are calculated
The calculator works through both sides of the equation.
On the savings side, it estimates the ABSD avoided. A Singapore Citizen buying a second property pays 20% ABSD; by decoupling so the buyer owns no property, that 20% can be saved on the new purchase price, often a six-figure sum.
On the cost side, it tallies the expenses of the transfer:
- Buyer's Stamp Duty on the share being bought out (the transferee pays BSD on the value of the share transferred).
- ABSD on the transfer, if the person receiving the share already owns property and is not exempt, though transfers between spouses may qualify for remission in certain cases.
- Legal and conveyancing fees for the transfer and any new mortgage.
- Refinancing or loan restructuring costs, since the sole remaining owner must usually requalify for the full loan on their own income.
The difference between the ABSD saved and these costs is your net benefit.
A worked example
A married couple jointly owns a condo worth S$1.6 million and wants to buy a second property at S$1.8 million. Buying jointly would trigger 20% ABSD on S$1.8 million, which is S$360,000. By decoupling, one spouse buys the other's half-share (S$800,000), incurring BSD of around S$18,600 plus a few thousand in legal fees. The freed spouse then buys the new home as a first property with no ABSD. Net of roughly S$25,000 in decoupling costs, the couple saves on the order of S$335,000. The calculator confirms whether your own numbers produce a comparable result.
Who should use it
Married couples planning to expand into a second property are the primary users, since spousal transfers are the most common decoupling route. Investors structuring a portfolio across family members use it to plan ownership before committing. Anyone weighing decoupling against alternatives (buying under one name from the start, or simply paying the ABSD) can use it to compare the true cost of each path.
Why running the numbers matters
Decoupling can save hundreds of thousands in ABSD, but it is not free and not always worthwhile, especially on lower-value properties where the transfer costs eat into the saving. The sole owner must also qualify for the entire loan alone, which can be a constraint. Modelling the net benefit (and confirming loan eligibility) before acting prevents a costly misstep. Because the rules around remission and eligibility are nuanced, professional advice is strongly recommended alongside the calculator.
Frequently asked questions
What is decoupling in Singapore property?
Decoupling is when one co-owner transfers their share of a property to the other, so the exiting owner no longer counts as a property owner and can buy another home without second-property ABSD.
How much can decoupling save?
The saving equals the ABSD avoided on the next purchase (20% of the price for a Singapore Citizen's second home) minus the BSD, legal and financing costs of the transfer. On higher-value purchases this is often a six-figure net gain.
Is decoupling legal in Singapore?
Yes, decoupling private property is legal. HDB flats generally cannot be decoupled except in limited circumstances. Always seek legal advice.
Do I pay stamp duty when decoupling?
Yes. The person buying out the share pays BSD on the value of that share, and ABSD may apply depending on their existing ownership and any available remission.
Can the remaining owner afford the loan alone?
This is a key constraint. After decoupling, the sole owner must usually requalify for the full mortgage on their income alone under TDSR. Check this before proceeding.
This guide is for general information and does not constitute legal or financial advice. Decoupling has significant tax and legal implications. Consult a conveyancing lawyer and mortgage adviser before acting.