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What does decoupling really cost?

Decoupling is when one joint owner buys the other's share, leaving a single owner. The staying owner and the exiting owner pay very different costs. The staying owner pays Buyer's Stamp Duty (BSD) on the share, funds the 25% deposit that MAS's 75% loan-to-value (LTV) limit doesn't cover, and refinances the loan solely in their own name. The exiting owner may owe Seller's Stamp Duty, must refund all CPF used plus interest, and keeps the cash left over. This lets them buy their next home at first-property tax rates — the Additional Buyer's Stamp Duty (ABSD) on a second property doesn't apply. This tool works out what each side pays, and lays out the timeline.

IRAS & MAS rules, verified 17 Jul 2026 · BSD from 15 Feb 2023 · ABSD from 27 Apr 2023 · SSD from 4 Jul 2025 · LTV 75% · Private property (HDB generally cannot decouple)

The property

S$
The share must transfer at market value — IRAS can query undervalued transfers.
S$
Split by the ownership share below: the exiting owner's portion is paid off from the sale proceeds, and the staying owner's portion becomes part of the new loan.
%
The percentage the exiting owner currently holds and is selling. Usually 50% when both owners hold an equal share.
yrs
Determines the exiting owner's SSD on the share sold.
Sets the SSD schedule: 4-year 16/12/8/4% (current) vs 3-year 12/8/4% (prior).

The staying owner (buying the share)

Sets the ABSD rate on the share purchased.
Buying more of a property you already co-own is assessed at your current property count.
%
75% is the most MAS allows for a first housing loan. Borrowing less means paying more of the deposit yourself, in cash or CPF — but you must still pay at least 5% in cash.
% p.a.
See current package rates. TDSR is assessed at 4% regardless.
years

The exiting owner (selling the share)

S$
Refunded to their CPF OA on completion — it is not cash. Check the CPF property statement.
S$
Typically 1.5% of the redeemed amount if within lock-in.
S$
Each side needs separate lawyers; S$5,500–S$7,000 total is typical. Split evenly here.

The timeline

The day the option is granted and the 5% cash changes hands.
weeks
BSD/ABSD fall due 14 days after exercise.
weeks
From exercise to legal completion — 10–12 weeks is standard.

The point of it all (optional)

S$
To show the ABSD saved by buying it as a first property instead of a second.

What does each owner pay?

A decoupling is a real sale and purchase of part of a property, and each owner pays a different set of costs.

Both sides of a 50% decoupling on a $1.4M private condominium, past the Seller's Stamp Duty window, with a Singapore Citizen staying owner who owns nothing else. These are the calculator's default figures. Figures illustrative.
The owner who stays paysAmountThe owner who leaves receivesAmount
Stamp duty on the share$15,600Price of the share$700,000
Deposit on the share, 25%$175,000Less the CPF refund− $300,000
Half the legal fees$3,000Less half the legal fees− $3,000
Total upfront$193,600Cash in hand$397,000
New loan — staying owner must clear on their own$525,000Tax status on the next purchaseFirst property

In this example, a $700,000 share sale returns only $397,000 in cash — the other $300,000 goes back into CPF, not a bank account. This is the detail most people miss.

Two costs are not included in this example. First, Additional Buyer's Stamp Duty (ABSD) — the staying owner may need to pay ABSD depending on citizenship and property count. Second, Seller's Stamp Duty (SSD) — the exiting owner may need to pay SSD if the sale is within four years of purchase. The staying owner also has to be able to pass the borrowing test alone, based on sole income; see our decoupling guide for the full process and the most common mistakes.

When is decoupling worth the cost?

Decoupling is worth it when the ABSD saved is more than the cost of decoupling. A Singapore Citizen couple buying a $1.6 million second home jointly would pay $320,000 in Additional Buyer's Stamp Duty, at 20%. If one spouse exits the first property first, that ABSD amount drops to $0 — the ABSD saved in this case is far more than the typical $20,000 to $40,000 decoupling cost.

But decoupling may not always pay off. A Permanent Resident staying owner pays 5% tax on the share they're buying. Decoupling too soon can trigger a 16% Seller's Stamp Duty that can cancel out the ABSD saved. The staying owner must also pass the borrowing test alone — the affordability calculator checks this. And HDB flats generally can't be decoupled, so this only works for private property.

In short: it's usually worth it if the ABSD saved beats the decoupling cost — including any Seller's Stamp Duty — and the staying owner can pass the borrowing test alone.

Frequently asked questions

What is decoupling?

One joint owner buys the other's share of a private property. That leaves a single owner. The exiting owner no longer owns any residential property. So their next purchase is taxed as a first property: 0% for a Singapore Citizen, instead of 20%.

How much does decoupling cost?

Start with stamp duty on the share, about $15,600 on a $700,000 half-share. Add Additional Buyer's Stamp Duty depending on the staying owner's citizenship status and how many properties they already own. Add Seller's Stamp Duty if you're selling within four years of buying. Then add legal fees — about $5,500 to $7,000 in total, since both sides need separate lawyers — plus any bank penalty for repaying early. The staying owner also pays a 25% deposit on the share they're buying.

Can HDB flats be decoupled?

Generally no. Since April 2016, HDB has allowed transfers between spouses only in specific situations. Those are divorce, marriage, death, financial hardship, giving up citizenship, or medical reasons. So if you're doing this specifically to save on Additional Buyer's Stamp Duty (ABSD), it only works for private property.

Does the exiting owner get their CPF back in cash?

No. All the CPF used, plus the interest it would have earned, goes back into their CPF Ordinary Account when the sale completes. First the loan is paid off. Then the CPF is paid back. Whatever is left goes to them as cash.

Is Seller's Stamp Duty payable?

Yes, if you sell within a few years of buying. For purchases from 4 July 2025, the rate drops from 16% to 4% over four years. For older purchases, it drops from 12% to 4% over three years. Sell after four years (three for older purchases), and SSD drops to zero.

Is decoupling legal? What about 99-to-1?

Decoupling is legal if it's a genuine sale at market value with full duty paid. Since 2023, IRAS has cracked down on a different practice: transferring a token 1% share right after purchase, purely to avoid ABSD. Those cases pay the unpaid duty plus a 50% penalty. Check your own situation with a lawyer.

How long does decoupling take?

About three months. You grant the option, then exercise it two weeks later. Stamp duty is due 14 days after exercise. Legal completion happens around 12 weeks after exercise. Bank and CPF processing can push completion out further.

Disclaimer This calculator is an educational estimate, not legal, tax or financial advice. It applies the IRAS BSD, ABSD and SSD schedules and MAS LTV rules in force as at July 2026 to a standard sale between joint owners of a private property, where one owner buys the other's share at market value. It doesn't check personal complications — like CPF withdrawal limits tied to property value, property held in trust, or an ongoing divorce — or factors outside this calculator's scope, like IRAS reviewing the deal for tax avoidance or a bank's own lending criteria. It also doesn't check whether the staying owner passes the borrowing test (TDSR) — verify that separately in the affordability calculator. Any of these could change the numbers or stop the deal. A conveyancing lawyer must structure a decoupling, and IRAS may review transfers it considers artificial. Always obtain legal and financial advice before proceeding. PropertyInsider.sg disclaims liability for decisions made on the basis of this tool.

Talk it through with an advisor

A calculator gives you the number; it can't tell you what to do with it. If you want to work through what these figures mean for your own situation — budget, ABSD position, timing an HDB sale, or comparing launches against resale options — you can request a one-to-one consultation.

  • No obligation. The first conversation is about your goals.
  • Affordability and stamp duty worked out on your actual numbers.
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Disclosure: advisory consultations are provided by Jamus Lee (CEA Reg. No. R065771E, ERA Realty Network Pte Ltd, Licence No. L3002382K), the publisher of PropertyInsider.sg, via JamusProperty.com. This is a separate service from our editorial research and has no influence over what we publish. See our editorial policy. Submitting this form shares your details with the advisory practice; see our privacy policy.

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