Joint purchase property in Singapore: how ABSD is counted

In a joint purchase of property in Singapore, IRAS counts every residential property in Singapore that each buyer holds any interest in, gives each buyer a rate from their own profile and count, and charges the highest of those rates on the entire price. A 10% or 20% share counts as one whole property, and an uncompleted new-launch unit counts once its sale and purchase agreement is signed.

That makes the names on a new-launch contract a money question before it is a family one. On an illustrative S$2,000,000 price, the gap between a 0% and a 20% additional buyer’s stamp duty (ABSD) rate is S$400,000, payable within 14 days after the signed contract.

This guide is the counting method behind the one-sentence rule in our stamp duty guide: five steps, run on three scenarios IRAS publishes, re-priced at S$2,000,000. It is general information from IRAS and CPF pages rechecked on 17 October 2026, not tax or legal advice.

How does IRAS count properties and rates when people buy together?

These rules from IRAS’s ABSD page (last updated 27 August 2026) decide a joint purchase:

• The profile is fixed on the purchase date, which IRAS takes as the earliest of the option acceptance date and the sale and purchase agreement date (it lists other dates for trusts and transfers; its FAQ excludes an option that is itself subject to signing the sale and purchase agreement). Later citizenship or PR status does not change it. See what each date starts.
• Any interest is a whole property. IRAS’s example: a person who owns a home with his wife and a 20% share of another property with a sibling owns two properties.
• Signed contracts count before completion, including an uncompleted unit once the agreement is signed. Gifts and inheritance count too. Homes outside Singapore and homes gazetted for compulsory acquisition do not, and neither does a home already under a contract to sell once the new buyer has executed the option to buy it.
• The highest rate applies to the whole value, the higher of price and market value, when buyers have different profiles.
• Rates on or after 27 April 2023: citizens no ABSD on a first residential property (0% below), 20% on a second, 30% on a third or later; permanent residents 5%, 30%, 35%; foreigners 60%; entities 65%. Our PR buyer guide works the other profiles.

What is the five-step count for who goes on the contract?

Run these steps for every name that might go on the contract, before anyone books:

1. List each buyer’s residential interests in Singapore: wholly owned, co-owned, a small inherited share, an unfinished unit under a signed agreement, anything gifted or transferred in.
2. Count properties, not percentages. A 10% share and a wholly owned house are one property each.
3. Set each buyer’s rate from IRAS’s table, using status on the purchase date and the number already owned. The new unit is the next one.
4. Take the highest rate among the buyers and apply it to the whole price or market value, whichever is higher.
5. Check whether a remission or refund route fits these exact buyers, what it requires to be sold, and by when.

The three cases below are IRAS’s published scenarios with an illustrative S$2,000,000 price swapped in. The S$ figures are our arithmetic. Buyer’s stamp duty (BSD) is due as well: on S$2,000,000 it is S$69,600 under IRAS’s residential BSD tiers. To run your own price and buyers, our free BSD and ABSD calculator takes the highest rate across joint buyers, before any remission or refund.

What if one buyer already co-owns a home with a parent?

IRAS’s scenario: a citizen co-owns a house with her mother. Her husband, also a citizen, owns no residential property. They buy their first matrimonial home jointly.

• Buyer A (citizen): one interest, the house shared with her mother, so the new home is her second property: 20%.
• Buyer B (citizen): none, so the new home is his first: 0%.
• Highest rate: 20% on the entire S$2,000,000, which is S$400,000 of ABSD. With S$69,600 of BSD, S$469,600 is due at stamping before any refund.

IRAS says both pay 20% “based on your ABSD profile which is the higher of the two profiles”, and may be eligible for a refund if they dispose of the interest in the co-owned house within six months of the date of purchase, TOP or CSC, whichever applies or is earlier. IRAS’s married-couple remission page (last updated 13 August 2026) adds that the property must be bought in the couple’s two names only, that each spouse may own an interest in no more than one residential property at the date of purchase, and that IRAS will not extend the six-month timeline. Its couples’ rates table (PDF, updated 27 April 2023) agrees for this profile. Our refund guide covers how a refund is claimed.

ABSD is paid first (IRAS’s refund conditions include that it has been paid) and refunded later, so S$400,000 must be available within 14 days of the signed contract. Our observation, not IRAS’s: because the first home is co-owned, whether it sells in time is not one buyer’s decision alone.

What does a small inherited share do to the count?

IRAS’s scenario: a citizen and his wife jointly own a semi-detached house. He also inherited a 10% share of another property. In IRAS’s wording, he buys a condominium unit with his son, a citizen who owns no property; the wife is not a buyer.

• Father (citizen): two interests, the house and the 10% share, so the condominium is his third property: 30%.
• Son (citizen): none, so it is his first: 0%.
• Highest rate: 30% on the entire S$2,000,000, which is S$600,000 of ABSD. With BSD, S$669,600 at stamping.

IRAS says a partial interest adds to the count. Its FAQ says ABSD is not payable on an inheritance made under a will, intestacy law or Muslim inheritance law, but the share still counts when the next purchase is counted. IRAS compares only the father’s and the son’s profiles, because the wife is not a buyer.

Our arithmetic from IRAS’s rate table: if the son bought the same unit alone as his first property, the rate would be 0%; with his father on the contract it is 30% on the whole price. That is the cost of the extra name, not a recommendation either way, and IRAS says it takes a stern view of any arrangement to reduce or avoid tax, including contrived or artificial purchase arrangements. Our reading of the couple conditions above is that this purchase would not fit the refund route, since it is not in a couple’s two names only; IRAS’s answer names no refund.

Does buying out a co-owner trigger ABSD?

IRAS’s scenario: a citizen owns only a 20% share of a house co-owned with his mother. She transfers her 80% share to him.

• Count before: one property, the 20% share.
• The buy-out: IRAS says it would have counted as his second property, but a citizen with one property acquiring more of the same property from a co-owner pays no ABSD. BSD is still payable on the 80% share; IRAS gives no figure.
• His next purchase: still his second property, at 20%. On a S$2,000,000 new launch, S$400,000.

For other profiles, IRAS’s page on acquiring additional interest in a property you already part-own (last updated 7 August 2026) sets partial remissions:

• Citizen who owns two residential properties: 30%, less 10% remitted, leaves 20%.
• Permanent resident who owns one: 30%, less 25%, leaves 5%.
• Permanent resident who owns two (from 27 April 2023): 35%, less 5%, leaves 30%.

The page adds conditions, including that any other joint transferees must have a lower applicable ABSD rate than the relevant individual before remission. It has no row for a citizen who owns three properties: IRAS’s FAQ says that acquisition counts as a fourth property at 30%. BSD is payable in every case.

Does the order of names or the size of a share change the rate?

IRAS counts any interest in an existing property as a whole property and applies the highest buyer’s rate to the entire value. Its pages do not make the rate depend on how the new unit is split. Our reading, an inference and not an IRAS statement: share size does not change the rate.

Name order appears in none of the IRAS pages we read, which tie the rate to each buyer’s profile and property count. Our reading: the order of names does not change the ABSD calculation. Ask your lawyer whether it matters for anything else in your documents.

Whose CPF can be used in a joint purchase?

CPF’s page on how much CPF savings you can use (last updated 26 May 2026) says, for a private property bought with a bank loan, that “you and your co-owners (if any) may use your respective OA savings up to the lower of the purchase price and the valuation price at the time of purchase”. Beyond that, they can continue up to 120% of that figure if they have set aside their respective Basic Retirement Sum. Each co-owner draws on his or her own Ordinary Account. The sentence does not say how the limit is shared between owners, so confirm the figures with CPF and your bank. The lease can lower the limit too if it cannot cover the youngest buyer using CPF to age 95: see freehold versus leasehold.

CPF’s page on using your CPF to buy a home (last updated 6 July 2026) lists stamp and legal fees among what OA savings can pay for, but IRAS says using CPF funds to pay stamp duty is subject to the terms and conditions of the private property and public housing schemes, and suggests checking with CPF Board. We have not confirmed whether ABSD can be paid from OA. Our guides on CPF limits and the refund and reading a home loan offer cover the rest of the funding plan.

What if someone is added or removed after the purchase?

Changing who holds a property can itself be a transfer for stamp duty. IRAS’s FAQ says ABSD is payable on a gift of a unit, calculated on market value, and that a couple who change the holding of a condominium from joint tenants to a 60-40 ratio owe ABSD on their respective profiles, because the change transfers an interest. Acquiring more of a property you already part-own counts as an additional property. This guide does not suggest changing anyone’s holding: in cases of tax avoidance, IRAS says the Commissioner of Stamp Duties will disregard or vary the arrangement, claw back the rightful stamp duty and impose a 50% surcharge on the additional duty payable. See our guide to adding or removing a name.

What to check before you sign

• Each buyer’s status on the purchase date, with the document that shows it.
• A written list of every residential interest each buyer holds in Singapore, including small and inherited shares and signed agreements for unfinished units.
• Each buyer’s rate, the highest rate, and the S$ figure on the whole price.
• Whether a refund or remission route fits these exact buyers, what must be sold, by when, and who has to agree to the sale.
• Cash for ABSD and BSD: IRAS requires both within 14 days after the signed contract, in full, with no deferral or instalments.
• The ABSD Declaration Form: every buyer completes it, and IRAS says to keep it for at least five years.
• Each co-owner’s CPF position, confirmed with CPF.

Terms such as BSD and TOP are in our new launch glossary; the wider sequence is in the research topic. Ask your lawyer to confirm the count in writing before the option is exercised.

Common questions