🏠 Property · Investment & Advanced · Sub-Silo 4 · Tool #6

Part-Share Purchase Calculator Singapore 2026
Buy Out a Co-Owner’s Share — BSD, ABSD, Legal Fees & Total Acquisition Cost

Calculate the total cost of buying out a co-owner’s share in a Singapore property — whether it’s a divorce buyout, inheriting a sibling’s share, buying out a joint investor, or acquiring a partial interest in a new property. The cost is more than just the share value: Buyer’s Stamp Duty (BSD) applies on the consideration paid, ABSD may apply if you are acquiring a new property interest, plus legal/conveyancing fees and valuation. This calculator computes all these costs and shows your total acquisition outlay, post-buyout ownership percentage, and whether the existing mortgage needs to be restructured.

✓ BSD on Share Value ✓ ABSD Analysis ✓ Divorce & Inheritance Cases ✓ Legal & Valuation Fees ✓ Post-Buyout Ownership
BSDOn Share Value
ABSD ExemptionDivorce Order
Mortgage DutyS$500 Cap
ValuationNeeded First
LegalS$3K–S$6K
💰 Part-Share Buyout Inputs
Property & Transaction

Divorce court orders may qualify for ABSD remission. Inherited properties have specific stamp duty rules. Select the most accurate reason for the most relevant analysis.

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Buyer Profile
Financing
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If there is an existing mortgage on the property, the co-owner being bought out will need to be released from the loan. The buyer must either refinance (taking on the full loan) or repay the co-owner’s share of the loan as part of the buyout consideration.

💰 Buyout Result
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Enter the property value, share percentage, buyer citizenship, and transaction reason to see the total cost of the part-share buyout including BSD, ABSD, and legal fees.

Buyout Cost Composition

Part-Share Property Purchase Singapore 2026 — When You Buy Out a Co-Owner, What Stamp Duty Applies

Buying out a co-owner’s share in a Singapore property is a common scenario: divorcing spouses buying out each other, siblings inheriting a property and one buying out the others, joint investors separating, or one partner in a co-purchase buying out the other. The transaction is treated as a partial property purchase — stamp duty (BSD and potentially ABSD) applies on the consideration paid for the share, not on the full property value. However, certain transactions (particularly divorce-related transfers under a court order) may qualify for BSD exemption or ABSD remission.

Stamp Duty on Part-Share Purchases 2026

DutyApplies OnRateNotes
BSDConsideration for share1%–5% progressiveAlways applies on market value of share
ABSDConsideration for share0%–35%Applies if acquiring new property interest
Mortgage DutyMortgage amountCapped at S$500Only if new mortgage taken

When BSD Exemption or ABSD Remission May Apply

ScenarioBSDABSD
Divorce — court order (spouse to spouse)ExemptRemission possible
Deceased estate (inheritance)Exempt (not a sale)May apply on transfer
Decoupling (spouse transfer)BSD appliesABSD exempt (spouse)
General buyout (non-spouse)BSD appliesABSD applies if 2nd+ property

BSD and ABSD rules are complex and fact-specific. Always verify with IRAS or a qualified stamp duty specialist before completing the transaction. This calculator provides an indicative estimate.

How This Part-Share Calculator Works — Consideration, Stamp Duty & Total Outlay

Step 1 — Select Reason and Enter Property Details

Select the reason for the buyout (divorce, inheritance, general, new property). Enter the property market value and the percentage share being purchased. The consideration is set to the market value of the share — the higher of agreed price or market value determines the stamp duty base.

Step 2 — Enter Buyer Profile and Financing

Select citizenship and current property count. The calculator applies BSD on the share value and determines ABSD applicability. For divorce transactions under a court order, ABSD remission may be available — the calculator shows S$0 ABSD for existing-owner buyouts. For buying a new property interest, ABSD at the applicable rate is applied.

Step 3 — See Total Cost and Post-Buyout Ownership

The results show the full cost breakdown (consideration + BSD + ABSD + legal + valuation) and the post-buyout ownership percentage. If buying out the remaining co-owner’s full share, you become the sole owner (100%). The existing loan portion being taken over is also shown.

3 Real Singapore Part-Share Examples — Divorce Buyout, Sibling Estate & Joint Investor

Divorce Buyout — S$1.5M Condo

Buy spouse’s 50%S$750,000
BSD (court order exemption)S$0
ABSD (court remission)S$0
Legal feesS$4,500
Total costS$754,500
Post-buyout ownership100%

Sibling Inherited Estate — S$2M

Buy sibling’s 50% shareS$1,000,000
BSD on S$1MS$24,600
ABSD (SC, 2nd prop)S$200,000
LegalS$4,500
Total costS$1,229,100
NoteConsider decoupling first

Joint Investor Buyout — S$1M Unit

Buy 50% from co-investorS$500,000
BSDS$9,600
ABSD (SC, 1st prop)S$0
Legal + valuationS$4,500
Total costS$514,100
Becomes sole owner100%

3 Expert Tips — Divorce BSD Exemption, Avoiding ABSD on Inheritance & Loan Restructuring

1

Divorce Transfers Under a Court Order Are BSD and ABSD Exempt

When a property is transferred between divorcing spouses under a court order (or Deed of Separation approved by court), the transaction is exempt from BSD and may qualify for ABSD remission. This is a critical distinction: an informal agreement between divorcing spouses does not qualify — the transfer must be pursuant to a court order (typically the Ancillary Matters Order from the Family Justice Courts). The exemption applies to both the BSD on the transfer and the ABSD that would normally apply if the receiving spouse is acquiring a second property. Ensure your divorce lawyer structures the property transfer as part of the court order, not as a separate transaction.

2

Inherited Property: Sell Within 1 Year to Avoid ABSD on Full Property

When a property is inherited and the estate distributes it to beneficiaries, IRAS generally does not impose ABSD on the inheritance itself (not a purchase). However, if beneficiaries then sell the inherited property, BSD applies to the buyer. If you inherit a property and want to buy out a co-beneficiary’s share (to become sole owner), this is treated as a purchase and BSD + ABSD may apply. Strategy: if possible, agree among beneficiaries to sell the inherited property entirely within 1 year of the deceased’s death — ABSD remission may be available for properties acquired through inheritance sold within this window. Consult an estate lawyer early.

3

Restructure the Mortgage Before Completing the Buyout

If the property has an existing mortgage and both co-owners are named on the loan, the co-owner being bought out must be released from the mortgage. The buyer must: (1) apply to the bank to assume the full mortgage (sole borrower); (2) prove they can service the full loan on their own income (TDSR check); (3) the bank may require refinancing at the current rate (which could be higher than the original rate). This loan restructuring should happen simultaneously with the share transfer — coordinate your lawyer and banker. If the buyer cannot qualify for the full loan alone, options include: prepaying part of the loan to reduce the balance, or getting a co-borrower (e.g., new spouse or parent) to join the loan.

16 FAQs — Part-Share Property Purchase Singapore 2026, BSD, ABSD Exemptions & Mortgage

What stamp duty applies when buying a co-owner’s share?+
BSD applies on the consideration (the market value of the share being purchased), calculated at progressive rates: 1% (first S$180K), 2% (next S$180K), 3% (next S$640K), 4% (next S$500K), 5% (above). ABSD may apply if the buyer is acquiring a property interest they did not previously hold (counts as buying a new property for ABSD purposes). Mortgage duty is capped at S$500 if a mortgage is involved. BSD and ABSD are both calculated on the market value of the share, not the full property value.
Is there a BSD exemption for divorce property transfers?+
Yes — transfers pursuant to a court order in divorce proceedings are exempt from BSD under the Stamp Duties Act. The transfer must be specifically under a court order (Ancillary Matters Order from the Family Justice Courts). The same court order may also support an ABSD remission application — IRAS allows ABSD remission where a spouse receives a property under a divorce court order, even if it makes them a two-property owner, provided the original property is sold within 6 months. An informal agreement without a court order does not qualify.
Does ABSD apply when buying a co-owner’s share?+
It depends on the scenario: (1) Decoupling (spouse transfer): no ABSD on inter-spousal transfer — the receiving spouse does not pay ABSD; (2) Buying co-owner’s share in property you already part-own: technically you are increasing your interest, not acquiring a new property. IRAS’s treatment is nuanced — in some cases no additional ABSD, in others the incremental share purchase triggers ABSD. Get IRAS or legal advice for this specific scenario; (3) Buying a new partial interest (you previously had 0% in this property): ABSD applies at your applicable rate on the consideration. Always get a stamp duty opinion from a lawyer before proceeding.
How is the consideration determined for stamp duty?+
Stamp duty is based on the higher of the agreed consideration or the market value of the share. IRAS requires a professional valuation to substantiate the market value. If you agree to buy a 50% share at S$600,000 but the property is worth S$1.5M (making the 50% = S$750,000), stamp duty is computed on S$750,000 — not the agreed S$600,000. This prevents artificial low-pricing to reduce stamp duty. Always obtain a valuation report before the transaction.
What happens to the existing mortgage when a co-owner is bought out?+
The co-owner being bought out is typically named on the existing mortgage. They must be released from the mortgage upon transfer. Process: (1) buyer applies to the bank to take over as sole borrower; (2) bank assesses the buyer’s income (TDSR) for the full loan alone; (3) if approved: existing mortgage is either novated (transferred to sole borrower) or refinanced; (4) if not approved: buyer must find ways to reduce the outstanding loan (prepayment), bring in a new co-borrower, or the buyout cannot proceed. This is often the most complex part of the buyout — address the bank financing before committing to the transaction.
Can I use CPF to buy out a co-owner’s share?+
Yes — CPF OA can be used to fund the consideration for buying a co-owner’s share, subject to CPF housing withdrawal limits (80%/55% depending on remaining lease and property type). The CPF usage is for the consideration paid for the share, not the full property value. BSD must be paid in cash — it cannot come from CPF. ABSD (if applicable) must also be paid in cash. The CPF component can fund the share consideration itself, but the stamp duties must come from cash savings.
What is the “consideration” in a part-share transfer?+
The consideration is what the buyer pays for the share. In a straightforward buyout: consideration = market value of the share × percentage. However, the consideration can also include taking on the co-owner’s share of the outstanding mortgage. Example: 50% buyout of a S$1.5M property with S$600K outstanding loan. Cash consideration = S$750,000 (50% of MV) minus S$300,000 (50% of loan taken on) = S$450,000 cash. Stamp duty is computed on the full S$750,000 market value of the share, not the net cash paid. The structure affects how much cash changes hands but not the stamp duty calculation.
Is a valuation required for a part-share transfer?+
Yes — IRAS requires a professional property valuation for stamp duty computation when there is no arm’s length consideration (e.g., between related parties). Even in an arm’s length transaction, IRAS uses the higher of agreed consideration or market value. A valuation by a MAS-approved valuer (CBRE, Knight Frank, JLL, etc.) typically costs S$300–S$600 for residential property and provides the basis for stamp duty computation. Always get the valuation before the transfer to avoid disputes with IRAS on the duty payable.
How do co-owners split ownership in Singapore?+
Singapore property can be co-owned as: (1) Joint tenancy: both owners hold equal undivided shares; if one dies, the survivor inherits automatically (right of survivorship); cannot sell half independently; (2) Tenancy-in-common: each owner holds a defined percentage share (e.g., 60/40); can be bequeathed independently; can sell own share. Most married couples hold as joint tenants. Investment co-purchasers typically hold as tenants-in-common with defined percentages. To change from joint tenancy to tenancy-in-common (needed for selling/buying specific shares), a “severance of joint tenancy” is filed with the Registrar of Titles.
What are the legal fees for a part-share transfer?+
Legal fees for a part-share transfer: (1) Buyer’s lawyer: S$2,500–S$5,000 (conveyancing, stamp duty computation, SLA registration); (2) Seller’s (outgoing co-owner’s) lawyer: S$1,500–S$3,000 (if they engage separately — sometimes waived if the transfer is within the family); (3) Mortgage restructuring (if applicable): additional S$1,000–S$2,000 for loan novation documentation. Total legal costs: S$3,000–S$8,000 depending on complexity. For divorce-related transfers handled through the same law firm managing the divorce proceedings, costs may be bundled at a lower total.
Can a co-owner be forced to sell their share?+
In Singapore, a co-owner generally cannot be forced to sell their share in an ongoing dispute. However, options exist: (1) Court application for sale: under the Land Titles (Strata) Act or common law, a co-owner can apply to court for an order to sell the entire property if the co-owners cannot agree; (2) Divorce proceedings: the court has power to order property division; (3) Bankruptcy: if a co-owner is declared bankrupt, the Official Assignee may force the sale of the bankrupt’s share. The most common resolution for co-owner disputes is negotiated buyout — one party agrees to buy out the other at a negotiated price, facilitated by lawyers.
What is the ABSD rate for buying a part-share as a second property?+
ABSD for Singapore Citizens: 0% (first property), 20% (second), 30% (third+). PRs: 5% (first), 30% (second+). Foreigners: 60% (all properties). For a part-share purchase, ABSD is computed on the market value of the share (not the full property). Example: SC buying 50% of a S$1.5M property as their second property: ABSD = S$750,000 × 20% = S$150,000. This is in addition to BSD on the S$750,000. Total stamp duty: BSD ~S$17,100 + ABSD S$150,000 = S$167,100 — more than double the property’s share value. This explains why ABSD avoidance strategies (decoupling, ABSD remission) are so important.
How does a part-share purchase differ from decoupling?+
They are related but opposite: Decoupling is when one co-owner transfers their share to the other — the transferor leaves the property, the remaining owner becomes sole owner. The goal is to free the transferor to buy a new property at 0% ABSD. Part-share purchase is when an outside party (or the existing partial owner) buys in to gain or increase ownership. Decoupling is often preparatory to a part-share purchase: you decouple first, then buy the new property (either wholly or as a part-share). The key difference: decoupling is an inter-spousal transfer (ABSD exempt), while buying a third party’s share attracts both BSD and potentially ABSD.
What happens to CPF used by the outgoing co-owner?+
When the outgoing co-owner is bought out, their CPF used for the property must be refunded to their CPF OA (principal + accrued interest). This CPF refund comes from the buyout consideration paid by the buyer. Example: outgoing co-owner used S$200,000 CPF (now S$280,000 with accrued interest). The buyer must pay at least S$280,000 in cash to the co-owner (to cover the CPF refund plus any cash that was the co-owner’s equity). The CPF refund is paid by the buyer through the lawyer’s trust account, directly to the co-owner’s CPF OA. This is coordinated by the lawyers and CPF Board at completion.
Can a Singaporean buy a part-share of a foreigners’ property?+
Yes — a Singapore Citizen can buy a part-share of any Singapore residential property, including one owned by a foreigner, subject to the normal property type restrictions (PRs and foreigners cannot buy certain HDB/landed residential properties). The SC buying the share pays BSD on the share consideration and ABSD if it is their second+ property. The foreign co-owner selling the share must check their own SSD obligations (if selling within 3 years of purchase) and applicable taxes in their home country. There are no additional restrictions on the buyer just because the seller is a foreigner.
Is the part-share purchase subject to Seller’s Stamp Duty?+
No — the buyer does not pay SSD. SSD (0% if holding 3+ years, 4%–12% if sold within 3 years for residential) is paid by the seller (the outgoing co-owner), not the buyer. If the outgoing co-owner acquired their share less than 3 years ago, they may face SSD on the consideration received. This should be factored into the buyout negotiation — the seller may expect to pass some SSD cost to the buyer through a higher agreed price. Always clarify who bears the SSD as part of the buyout negotiation.

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Legal Disclaimer & Editorial Transparency. BSD on share value: 1% (first S$180K), 2% (next S$180K), 3% (next S$640K), 4% (next S$500K), 5% above. Stamp duty on higher of consideration or market value. ABSD: SC 0%/20%/30%, PR 5%/30%/35%, Foreigner 60%. Divorce court order transfers: BSD exempt, ABSD remission possible. Inter-spousal transfers (decoupling): ABSD exempt. Inheritance transfers: BSD exempt on distribution, may apply on subsequent buyout. Mortgage duty capped at S$500. Legal fees estimated. CPF used by outgoing owner must be refunded to CPF OA. All ABSD and BSD scenarios are fact-specific — verify with IRAS (iras.gov.sg). Not legal or financial advice. Consult a property lawyer. Operated by MAFHH INTERNATIONAL LTD.