The Seller's Stamp Duty Calculator, Explained

Seller's Stamp Duty (SSD) is the tax on selling residential property too soon — and the rule that trips people up is that the rate is set by when you bought, not when you sell. Singapore tightened SSD in July 2025, so there are now two regimes in play with different holding periods and rates. The Seller's Stamp Duty Calculator reads your acquisition date, picks the correct schedule, and shows exactly how the rate and the dollar amount are derived.

Two regimes, picked by your purchase date

The calculator applies whichever schedule matches when you acquired the property:

For properties bought between 11 March 2017 and 3 July 2025, SSD runs on a three-year window: 12% if you sell within the first year, 8% in the second, 4% in the third, and 0% after three years.

For properties bought on or after 4 July 2025, the window extends to four years and each tier is four points higher: 16% in year one, 12% in year two, 8% in year three, 4% in year four, and 0% thereafter.

And for properties bought before 11 March 2017, no SSD applies at all. You don't choose the regime — your purchase date does, and the calculator selects it for you.

The detail that decides a borderline sale

SSD bands are measured on calendar anniversaries, not a 365-day count, and each band is half-open: a sale exactly on an anniversary tips into the next, lower band. Sell one day before your third anniversary under the old regime and you owe 4%; sell on the anniversary and you owe 0%. On a large sale that single day can be worth tens of thousands, which is why the calculator computes the holding period to the exact date rather than rounding to whole years. SSD is also charged on the higher of your sale price and the market value, and applies to residential property — HDB flats, condos, landed and ECs alike.

How to read it

Open the Seller's Stamp Duty Calculator, enter your acquisition date, intended sale date, and sale price (and market value if higher), and read the rate, the band it falls in, and the duty. If the number is large and you're close to a band boundary, the practical takeaway is usually "wait until the anniversary" — the calculator shows precisely which date flips you to the lower rate. If you bought before the relevant cut-off and have held past the window, it confirms you owe nothing.

This is the sell side; for what actually lands in your pocket after the sale, see the Sale Proceeds Calculator.

Check your SSD at tribesg.com/stamp-duty/sellers.

Sources: TRIBE Seller's Stamp Duty Calculator; SSD schedules per IRAS — 3-year regime (purchases 11 Mar 2017–3 Jul 2025) and 4-year regime (from 4 Jul 2025), as at June 2026. Informational only; not tax or financial advice.

Silas Tan is a District Director at Huttons Asia and co-founder of TRIBE. This article is for informational purposes and does not constitute financial or investment advice. CEA Registration R000303I.