Decoupling is the transfer of one co-owner’s share in a property to the other, so that one of them ends up owning nothing. The usual reason is Additional Buyer’s Stamp Duty: the spouse who now owns no residential property may buy the next one at a lower ABSD rate, or none at all.
It is a legitimate transaction in the right circumstances. It is also one of the most scrutinised areas in Singapore property, and the answer for most people asking about it is shorter than they expect.
If it is an HDB flat, the answer is no
A resale of part-share in an HDB flat is not allowed between a married couple. That is HDB’s rule, and there is no application to make or exception to argue.
Couples who want one spouse freed of the flat for ABSD purposes therefore cannot achieve it by transferring a share. The realistic options are to sell the flat, or to keep it and accept the ABSD position on the next purchase.
Changes in flat ownership are possible where family circumstances change, through a different mechanism: a change in flat ownership not through a sale, with no money changing hands, used in cases such as divorce, marriage, or the death of an owner. That is a different thing from decoupling, and it exists for life events rather than for tax planning.
Separately, HDB flat owners have their own restrictions on acquiring private property, including the minimum occupation period, which is worth checking before planning anything.
For private property, it is possible, and it is not free
Where the property is private, one co-owner can transfer their share to the other. Several costs and consequences follow:
Buyer’s stamp duty is payable by the receiving owner on the value of the share transferred. On a substantial property this is a real number, and it should be weighed against the ABSD it is intended to save rather than assumed to be trivial.
ABSD may apply to the transfer itself, depending on the receiving owner’s own profile and how many residential properties they hold.
The mortgage has to be dealt with. The outgoing owner has to be released from the loan, which usually means refinancing, and the remaining owner has to qualify for the whole loan alone. This is where decoupling most often fails in practice, and it fails after costs have been incurred.
CPF has to be refunded. The outgoing owner refunds the CPF savings used on their share, with accrued interest. See our note on using CPF to buy a home.
Legal work on both sides. The transfer is a conveyance, and it is outside the fixed fee published on our residential conveyancing page for that reason.
The part that has teeth: 99-to-1 arrangements
A pattern IRAS has audited is the two-step “99-to-1” purchase. One buyer with no property count buys in their own name, then shortly afterwards sells a small share, often 1%, to another person with a higher ABSD profile. Structured that way, ABSD falls on the small share rather than on the whole property.
IRAS treats these audits as routine work to uncover arrangements entered into for the purpose of reducing or avoiding stamp duty. Where the Commissioner of Stamp Duties finds tax avoidance, the arrangement can be disregarded or varied, the correct duty clawed back, and a 50% surcharge imposed on the additional duty. Further penalties of up to four times the outstanding amount may follow if duty and surcharge are not paid by the deadline.
There have also been prosecutions for giving false or misleading information to IRAS during a stamp duty audit.
Where the line falls
Owning property jointly in unequal shares is not itself objectionable, and there are ordinary reasons for it: differing contributions, estate planning, a parent helping a child.
What attracts scrutiny is an arrangement whose purpose is to reduce duty, and the sequencing tends to give it away. A purchase in one name followed within weeks by the transfer of a token share to a higher-ABSD buyer looks like what it is.
The practical advice is the same either way: decide the ownership structure before you buy, for reasons you can explain, and take advice before committing rather than restructuring afterwards.
Before you go any further
Four questions answer most of it:
- Is it an HDB flat? If so, and you are married, decoupling is not available.
- Can the remaining owner carry the whole mortgage alone? Ask the bank before anything else.
- What is the stamp duty on the transfer, against the ABSD it would save?
- What is the CPF refund on the outgoing owner’s share?
If the arithmetic still works after those four, it is worth a conversation. If it does not, better to find out now.
See also our notes on stamp duty when buying property and the Option to Purchase.