Last reviewed 20 Oct 2026
All facts checked 20 Oct 2026 · Sources linked under each table
Short answer: Dual key unit meaning in Singapore, and who it is for
Key Takeaways
- IRAS counts every residential property you own any interest in. Its ABSD pages do not carve out dual key units.
- URA allows renting private homes only for stays of at least 3 consecutive months, with occupancy caps. Its page does not mention dual key.
- MAS requires banks to apply a minimum 30% haircut to rental income in the TDSR.
Verified fact list
| Topic | What the official source says |
|---|---|
| Definition | No official definition found. Market usage: one unit with two separately accessible sections. |
| Property count for ABSD | As long as a buyer owns any interest in a residential property, it is included in the count. Residential properties owned wholly, partially or jointly all count. |
| Joint buyers | For joint purchases by buyers of different profiles, the highest applicable ABSD rate applies to the entire value of the property. |
| BSD | Computed on the higher of the price or market value, at the same tiered rates as any residential property. |
| SSD | Payable if residential property is disposed of within the holding period, which is 4 years for property acquired on or after 4 Jul 2025. |
| Renting out | All occupants must stay at least 3 consecutive months. Short term accommodation is not allowed. |
| Loans | MAS sets the TDSR threshold at 55% of monthly income and requires a minimum 30% haircut on rental income. |
Source: IRAS ABSD, IRAS BSD, IRAS SSD, URA renting property, MAS TDSR thresholds and MAS calculating TDSR, checked 20 Oct 2026.
ABSD and ownership
IRAS sets ABSD by the buyer's profile and the number of residential properties they own at the date of purchase. A dual key unit is sold under one strata title, so in the count it is one property. IRAS does not say this about dual key units in so many words, so ask your conveyancing lawyer to confirm for the unit you are buying. What a dual key can do is save a second ABSD count that buying two separate units would trigger. It does not make the purchase free of ABSD.
| Buyer profile | First property | Second property | Third and later |
|---|---|---|---|
| Singapore Citizen | None | 20% | 30% |
| Singapore PR | 5% | 30% | 35% |
| Foreigner | 60% on any residential property | ||
| Entity | 65% on any residential property | ||
Source: IRAS, Additional Buyer's Stamp Duty, rates on or after 27 Apr 2023, checked 20 Oct 2026.
Property tax
IRAS taxes owner occupied and non owner occupied residential property on different progressive scales, applied to the Annual Value. Owner occupier rates apply to only one property that you own and occupy. IRAS rate pages do not say how a unit that is partly occupied and partly rented is treated, so ask IRAS about your own unit.
| Annual Value, owner occupier (from 1 Jan 2025) | Rate |
|---|---|
| First S$12,000 | 0% |
| Next S$28,000 (to S$40,000) | 4% |
| Next S$10,000 (to S$50,000) | 6% |
| Next S$25,000 (to S$75,000) | 10% |
| Next S$10,000 (to S$85,000) | 14% |
| Next S$15,000 (to S$100,000) | 20% |
| Next S$40,000 (to S$140,000) | 26% |
| Above S$140,000 | 32% |
| Annual Value, non owner occupier (from 1 Jan 2024) | Rate |
|---|---|
| First S$30,000 | 12% |
| Next S$15,000 (to S$45,000) | 20% |
| Next S$15,000 (to S$60,000) | 28% |
| Above S$60,000 | 36% |
Source: IRAS, Property tax rates, checked 20 Oct 2026.
Renting out the sections
URA says all occupants of a private home must stay for a minimum of three consecutive months, and the property cannot be used as short term accommodation. Private homes smaller than 90 sqm have an occupancy cap of six unrelated persons per property, and the cap also applies to tenants who sublet. From 22 Jan 2024 to 31 Dec 2028 larger private homes of at least 90 sqm can register for a higher cap of eight, with a S$20 registration fee. URA's page does not address dual key units, so ask URA and your management corporation how the cap is counted across the two sections.
Source: URA, Renting property, checked 20 Oct 2026.
Financing
MAS sets the TDSR threshold at a maximum of 55% of the borrower's monthly income. Banks compute loan instalments at the higher of a 4% floor or the actual rate. They must apply a minimum haircut of 30% to rental income, and must verify it with a stamped tenancy agreement. Each bank has its own approach beyond that, so ask yours.
Source: MAS, TDSR thresholds and MAS, calculating TDSR, checked 20 Oct 2026.
Prices
No price table is given. We found no official dataset that labels dual key units, so any average or median would be an estimate. For a specific unit, ask your agent for recent transactions in the same project and compare unit type and size.
Frequently asked questions
What is a dual key condo?
Dual key is a market term for a condominium unit made of two separately accessible sections, usually a larger main part and a smaller studio part, sold as one unit. We found no IRAS, URA or HDB page that defines the term, so check the developer's approved plans and the strata title for any specific unit.
Does a dual key unit count as one property for ABSD?
IRAS counts each residential property in which the buyer owns any interest, and its ABSD pages do not mention dual key units. A unit sold as one strata lot is one property in that count, but ask your conveyancing lawyer to confirm for your unit. A dual key does not remove ABSD. The rate still depends on your profile and how many properties you already own.
What ABSD rates apply to a dual key unit?
The same rates as any residential property, for purchases on or after 27 Apr 2023: Singapore Citizens 0% on a first property, 20% on a second and 30% on a third or later; Singapore PRs 5%, 30% and 35%; foreigners 60%; entities 65%. Where joint buyers have different profiles, the highest applicable rate applies to the whole property (IRAS).
How is property tax charged on a dual key unit?
IRAS charges owner occupied and non owner occupied residential property at different progressive rates. Its rate pages do not say how a unit that is partly lived in and partly rented is treated, so ask IRAS about your unit. Owner occupier rates apply to only one property that you own and occupy.
Can I rent out each part of a dual key unit separately?
URA's rules for renting out private homes say all occupants must stay at least 3 consecutive months and short term accommodation is not allowed. A private home under 90 sqm has an occupancy cap of 6 unrelated persons, and larger homes can register for up to 8 until 31 Dec 2028. URA's page does not address dual key units, so ask URA and your management corporation how the cap is counted.
Is there a price table for dual key condos?
Not here. We found no official dataset that labels dual key units, so any average price would be a guess. HDB resale data is the exception for HDB flats, but private condo transaction data we checked does not tag dual key units.
General information only, not property, legal or financial advice. Confirm specifics with IRAS, URA, MAS and your conveyancer.
How does this apply to your own numbers?
General rules only take you so far. What actually decides your move is your financing, your timeline, and what you already own. A Property Portfolio Analysis maps your real position, so you are deciding on your own figures rather than a rule of thumb.
Book a free 30 minute call WhatsApp WinfredSources & References
- IRAS: Additional Buyer's Stamp Duty, checked 20 Oct 2026
- IRAS: Buyer's Stamp Duty, checked 20 Oct 2026
- IRAS: Seller's Stamp Duty for residential property, checked 20 Oct 2026
- IRAS: Property tax rates, checked 20 Oct 2026
- URA: Renting property, checked 20 Oct 2026
- MAS: Calculating TDSR for property loans, checked 20 Oct 2026
- MAS: TDSR thresholds for property loans, checked 20 Oct 2026