Introduction
This article features learnings from a specialised decoupling property seminar conducted by law firm Circular Law Chambers LLP.
The seminar was conducted by managing partner Lilian Lim, who is also the head of the real estate practice, and Debbie Brittany Lim, a partner of the firm, both of whom have extensive experience in real estate conveyancing.
The seminar seeks to clarify key questions surrounding the legality of decoupling property, especially in light of recent IRAS enforcement actions and court decisions that have drawn a clearer line between acceptable tax planning and unlawful tax avoidance.
The focus is on practical scenarios that typical property owners may face, so that readers can better understand how the law is applied in real situations.
Disclaimer
The information shared in this article reflects the authors’ personal understanding and key takeaways from a recent seminar on decoupling property in Singapore conducted by Circular Law Chambers and is intended for general informational and educational purposes only.
The content should not be interpreted as legal advice and may not represent the exact words or opinions expressed by the speakers or any other legal professional; readers are strongly advised to consult a qualified lawyer or legal advisor for guidance specific to their own situation.
Context and objective
From a tax treatment perspective, decoupling property remains a topic where IRAS has not taken a fully definitive, black‑and‑white stance. While Section 33A of the Stamp Duties Act is the key statutory provision governing stamp duty avoidance, its application depends heavily on how IRAS and the courts interpret the facts of each individual case.
Because of this, there is a strong reliance on case precedence and recent enforcement actions to understand how the courts and IRAS define what is legal or illegal in the context of decoupling, 99‑to‑1 structures, and similar arrangements.
The objective of this article is to share key learnings from the Circular Law Chambers seminar and to clarify common questions that have surfaced amid recent news reports and guidance on decoupling and 99‑to‑1 schemes.
Readers who want a broader overview of the legality of decoupling in Singapore can also refer to a dedicated article on “Legal Guide to Decoupling” for additional context, bearing in mind that only a qualified lawyer can assess their specific plans.
Lessons from IRAS 100‑1 investigations
In April 2023, The Straits Times reported that IRAS was investigating so‑called “100‑1” and similar ABSD loophole cases, where buyers tried to use highly skewed share splits to reduce stamp duty. These arrangements typically involved an initial buyer with no existing property purchasing 100 per cent of a private home without paying ABSD, then quickly selling a token 1 per cent share to a relative who already owned property.
Under this pattern, the second buyer—who should have paid ABSD on a full co‑ownership share if both parties had bought together from day one—only paid ABSD on the 1 per cent slice, dramatically lowering the family’s overall tax bill. The Straits Times coverage and expert commentary made clear that IRAS views such staggered 100‑1 or 99‑1 deals as artificial schemes whose main purpose is ABSD avoidance, and that these cases have “zero chance of success” once audited.
What this means for decoupling vs 100‑1 schemes
A key learning from these investigations is that the 100‑1 two‑step pattern is not the same as conventional decoupling and is treated as illegal tax avoidance rather than legitimate restructuring. In a standard 100‑1 scheme, one party “fronts” the entire purchase, then sells a 1 per cent interest shortly after, purely to reduce the ABSD that a higher‑profile owner (such as a parent or relative with existing properties) would otherwise have had to pay if they had been on the title from the start.
By contrast, in typical decoupling, both parties buy the first property together at the outset, each paying the correct BSD and ABSD on their share, and only later does one owner sell his or her interest to the other so that the exiting party can buy another property in sole name. The IRAS stance documented in the April 2023 reporting and subsequent summaries is that it will disregard contrived multi‑step transactions designed purely to shrink ABSD, recompute duties as if the property had been jointly purchased at the beginning, and impose surcharges and penalties.
Risks of templated “loophole” tactics
Another important takeaway, highlighted by tax expert Associate Professor Stephen Phua, is that templated decoupling or share‑split tactics are especially risky because they leave a clear digital footprint. IRAS can use data analytics to filter for repeated patterns, such as a 100 per cent purchase followed by a 1 per cent transfer within days to a related party with existing properties—and flag these cases for in‑depth audit under Section 33A.
This means that once a particular pattern of tax‑driven structuring becomes common knowledge or is promoted as a “hack”, IRAS can systematically identify and review similar deals completed over many years, with no statutory time bar on stamp duty audits.
Property owners therefore need to be cautious about following templated “loophole” strategies and should instead ensure that any decoupling or share‑split arrangement they adopt is grounded in genuine commercial reasons, properly documented, and fully transparent to IRAS.
Lessons from Ngor Shing Rong Jake v Wong Mei Lee Millie
The 2025 High Court decision in Ngor Shing Rong Jake v Wong Mei Lee Millie involved an unmarried couple who bought a three‑bedroom condominium in a 99:1 legal share structure, with admitted plans to later “decouple” so that one party could buy another property without ABSD. The court stressed that a 99‑1 structure is not illegal by itself, but that any decoupling or ownership arrangement will be unlawful if it is a sham used solely to avoid taxes without a genuine change in beneficial ownership or commercial purpose.
1. “Secret arrangements” and sham structures
One key lesson is that a “secret arrangement” designed mainly to avoid ABSD can be treated as illegal, even if the paperwork appears compliant. If a supposed “seller” in a 99‑1 or decoupling transaction continues to behave like a true owner—paying expenses, controlling decisions, and expecting profits—the court and IRAS can look past the documents and characterise the structure as a sham. In Jake v Millie, the couple ultimately were not penalised under stamp duty law because their contemplated decoupling step was never actually carried out, but the judgment makes clear that executing such a plan purely as a tax workaround would attract anti‑avoidance scrutiny.
2. Legal shares vs beneficial ownership in 99‑1
The case also shows that legal shareholding (for example, 99‑1 tenancy in common) is not conclusive of who really owns how much of a property. The High Court examined actual CPF and cash contributions, loan liabilities, and who serviced the mortgage to infer each party’s beneficial interest, rather than simply accepting the 99‑1 split on the title. For owners considering decoupling, the safer approach is to align legal ownership, financial contributions, and the sharing of rental or sale proceeds with the true intended split, without hidden side deals that contradict what is registered.
3. Importance of evidence and documentation
Finally, Jake v Millie underlines that evidence and documentation are critical, especially when relationships break down. WhatsApp messages, side agreements, payment trails, and bank or CPF records were all examined to determine the parties’ real intentions on ownership and any tax‑motivated plans.
Anyone contemplating decoupling should therefore keep clear records of the purpose of the structure, how each party is funding the purchase, and any understandings on who ultimately owns what, and should also be familiar with legal details on decoupling process and documentation requirements before proceeding.
Common Case Studies Addressing Frequently Asked Questions Pertaining to Decoupling Property.
Case study 1 – Using another person’s name purely to avoid ABSD
In this scenario, both John and Mary have sufficient income and are eligible for a loan, but John already owns other properties while Mary has none, and the only stated reason for putting the new property in Mary’s name is so that John can escape paying ABSD on what is effectively his next property. In substance, the arrangement is designed so that Mary appears as the legal owner while John remains the true economic owner.
Outcome
On these facts, the structure would very likely be treated as a breach of Section 33A of the Stamp Duties Act, which allows IRAS to disregard or re‑characterise any transaction where the main purpose is stamp duty avoidance. IRAS can recompute ABSD based on the true economic ownership (treating John as the real buyer) and impose surcharges and possible penalties on top of the underpaid duty.
Rationale
The High Court decision in Ngor Shing Rong Jake v Wong Mei Lee Millie SGHC 119 reinforces this approach by stressing that when a structure is used purely as an ABSD “hack” with no genuine shift in beneficial ownership or commercial purpose, the courts will look past the legal form to the real substance of the arrangement. In such cases, the transaction is treated as unlawful tax avoidance, not legitimate decoupling, even if the paperwork appears to comply with formal requirements.
Case study 2 – Foreign buyer using a Singaporean’s name to avoid ABSD
In this scenario, Jaslyn is a Singapore citizen with no existing property, while Jason is a foreigner who would normally face significantly higher ABSD rates on a residential purchase. The parties are not married, and the only stated reason for structuring the purchase in Jaslyn’s sole or dominant name is to help Jason escape the ABSD that would otherwise apply to him as a foreign buyer.
When “fronting” for a foreigner becomes avoidance
Here, Jaslyn is effectively being used as a front so that Jason can enjoy the benefits of ownership without paying the foreign‑buyer ABSD that the law intends him to pay. When the main stated motive is to sidestep the higher ABSD for foreigners, rather than to reflect genuine beneficial ownership, the arrangement is at high risk of being treated as stamp duty avoidance.
Breach of Section 33A and IRAS powers
On these facts, the structure is likewise very likely to be treated as a breach of Section 33A of the Stamp Duties Act, which targets transactions whose main purpose is stamp duty avoidance. IRAS would be entitled to disregard the legal form of the deal, recompute ABSD at the rate applicable to a foreign buyer’s true interest, and impose surcharges and penalties on the underpaid duty.
Substance over form: what the courts will examine
Read together with Ngor Shing Rong Jake v Wong Mei Lee Millie SGHC 119, this scenario illustrates how both IRAS and the courts focus on substance over form and reject purely tax‑driven ownership structures. If Jason is in reality funding the purchase, controlling the property, and expecting the economic benefits, while Jaslyn’s role is mainly to lend her name and citizenship status, the arrangement is likely to be characterised as an artificial ABSD‑avoidance scheme rather than a bona fide allocation of beneficial ownership.
Case study 3 – Parent helping adult child with no income
In this scenario, an adult child above 21 with no income wants to buy a property, while the parent already owns another residential property but has the income capacity to support the loan. The stated intention is legacy planning and helping the child become a homeowner, but in practice the parent may be funding or backing the purchase without that role being fully reflected in the ownership and ABSD paid.
When support becomes stamp duty avoidance
Read against IRAS’ 2023 enforcement stance on 99‑to‑1 and similar schemes, this kind of structure is treated as stamp‑duty avoidance and therefore illegal if the parent is effectively a co‑purchaser or guarantor yet is kept off the title or given only a token interest so the family pays less ABSD. IRAS has stated that such deals have “zero chance of success” and will be re‑assessed under Section 33A where a higher‑profile owner with existing properties is clearly backing the purchase but not paying the ABSD that corresponds to their real economic interest.
Need to reflect the parent’s true interest and pay correct ABSD
If, in this scenario, the parent is in substance sharing the purchase price, servicing the loan, or expecting a share of the eventual proceeds, IRAS can disregard the legal form, recompute ABSD as if the parent had come in properly from day one, and impose a surcharge (currently 50 per cent of the underpaid duty in many 99‑to‑1 style enforcement cases). By contrast, transparent parent–child purchases where the parent’s participation is accurately reflected on the title and the parent pays the rightful ABSD as a multiple‑property owner are generally not the focus of avoidance action.
Case study 4 – Secret 50–50 deal under a 99–1 share split
In this scenario, Harry and Winnie buy a property in legal shares of 1 per cent (Harry) and 99 per cent (Winnie), but privately agree that Harry will actually fund 50 per cent of the price and expenses and receive 50 per cent of the sale proceeds. Their stated reason for using a 1 per cent / 99 per cent structure is to reduce Seller’s Stamp Duty (SSD) and Buyer’s Stamp Duty (BSD) when they later “decouple” this first property and buy a second one in Harry’s sole name, which they also intend to share 50–50 in substance.
Secret side deals that contradict the title
The core issue is that the private 50–50 agreement directly contradicts the registered 1 per cent / 99 per cent split, revealing that the legal structure was engineered to minimise stamp duties rather than to reflect genuine beneficial ownership. In Ngor Shing Rong Jake v Wong Mei Lee Millie SGHC 119, the High Court stressed that where there is a side understanding inconsistent with the registered 99–1 shares, the court can look past the title and treat the arrangement as a sham, especially if the purpose is to avoid ABSD or other stamp duties.
Likely treatment under Section 33A
Applying the Jake vs Millie case reasoning, this case is very likely to be characterised as an illegitimate tax‑avoidance scheme rather than a genuine 99–1 investment. The secret agreement shows that Harry and Winnie always intended a 50–50 beneficial split and deliberately used the 1 per cent / 99 per cent configuration to reduce SSD and BSD across two properties, which fits squarely within the kind of tax‑driven arrangement that Section 33A of the Stamp Duties Act is designed to neutralise.
On a substance‑over‑form approach, a court and IRAS can treat each party as a 50 per cent owner for duty purposes, disregard the artificial 99–1 label, re‑assess stamp duties on the true economic interests, and impose surcharges on the underpaid amounts.
Case study 6 – Jack and Jill’s 99–1 legacy planning
In this scenario, a married couple owns their first home in 1 per cent / 99 per cent shares, with a long‑term plan for the 1 per cent owner to transfer that share so the 99 per cent owner eventually holds the property outright, while the other spouse later buys a second property in sole name.
Their stated objectives are legacy planning for their children, wealth creation for the family, and building a retirement‑oriented property portfolio, rather than chasing short‑term tax savings.
When 99–1 can be consistent with genuine planning
Where the legal 1 per cent / 99 per cent split genuinely reflects the couple’s real intentions and financial contributions, and all applicable Buyer’s Stamp Duty and Additional Buyer’s Stamp Duty are correctly paid on each acquisition, such a structure would generally not, by itself, amount to stamp‑duty avoidance under Section 33A of the Stamp Duties Act.
The key is that there is no hidden side deal contradicting the 99–1 allocation and no attempt to disguise beneficial ownership in order to underpay duty.
How IRAS distinguishes avoidance from legitimate family planning
IRAS has indicated in its 2023 clarification on 99‑to‑1 arrangements that its main concern is with structures whose primary purpose is to reduce stamp duty or ABSD, especially where there are undisclosed understandings that the 1 per cent owner is in substance a 50 per cent owner.
At the same time, government statements in Parliament recognise that families may legitimately use different ownership structures for reasons such as legacy planning and retirement needs, provided they accept the correct tax consequences; where the intentions are bona fide and the factual pattern supports the declared ownership, genuine family planning is less likely to be treated as a breach of Section 33A.
Case study 7 – Divorce after decoupling or 99–1 splits
When a couple uses decoupling or unconventional share splits such as 99–1 for a jointly owned home, those arrangements can later come under scrutiny if the relationship breaks down. The key practical question in a divorce is how the property will be treated and divided as a matrimonial asset, regardless of any earlier tax‑driven structuring.
Matrimonial asset treatment under the Women’s Charter
In a divorce, the Family Justice Courts will usually treat the home as a matrimonial asset and divide it under Section 112 of the Women’s Charter, by reference to each spouse’s direct and indirect contributions, rather than simply following any previous decoupling plan or the 99–1 share recorded on paper. Even if one spouse holds sole legal title after decoupling, or only 1 per cent on the deed, the court can still include the full property in the matrimonial pool and apportion its value based on what is just and equitable.
Contribution‑based analysis overrides tax structuring
Family law focuses on achieving a fair division between spouses, so the court will look at the entire course of the marriage—who paid the mortgage and other outgoings (direct contributions), who maintained the home and cared for the family (indirect contributions), and other relevant factors—before deciding how to split the asset. Any prior decoupling or 99–1 structuring therefore does not guarantee a particular share in a divorce; it is the contribution‑based analysis under family law, not earlier tax planning, that ultimately determines how the property is shared between Jacky and Jillian.
Case study 8 – Decoupling to own 3 properties as a couple
In this scenario, a married couple already owns two properties in equal 50–50 shares and considers using decoupling to rearrange ownership so that one spouse appears to own fewer properties on paper and can buy a third property with lower or no ABSD. The central issue is whether such restructuring genuinely changes beneficial ownership, or whether it is simply a way to expand the couple’s combined property portfolio while under‑paying stamp duty.
IRAS view: three‑property outcome vs paper shares
From a stamp duty perspective, IRAS is likely to focus on the end result—that the couple as a family unit controls three properties—rather than just the intermediate paperwork used to reshuffle shares. If the decoupling steps are driven mainly by a desire to keep one spouse “clean” for ABSD purposes, while both continue to benefit economically from all three properties, IRAS can invoke Section 33A of the Stamp Duties Act to treat the structure as stamp‑duty avoidance, recompute ABSD on the true economic interests, and impose surcharges.
Divorce risk: 50–50 reality despite decoupling
If the relationship later breaks down, the Family Justice Courts will again look past the couple’s decoupling history and treat all three properties as matrimonial assets, dividing them under the Women’s Charter based on each spouse’s direct and indirect contributions. Even if, on paper, one spouse holds two properties in sole name and the other holds only one, the court can still recognise that both contributed financially and non‑financially across the entire portfolio and apportion the sale proceeds accordingly, so tax‑motivated structuring does not guarantee who ends up with what in a divorce.
More Decoupling Case Studies for your Reference
- Decoupling case study – How a savvy young couple overcame ABSD hurdle to own 2nd property in Bukit Timah ?
- Decoupling Case Study – How a couple cautiously upgraded from a humble HDB into 2 private condo in less than 5 years, via decoupling 99-1
