Answers · UK 2025/26
How does stamp duty work on a shared ownership property?
On a shared ownership home you can either pay SDLT in stages as you buy more shares, or make a one-off market value election on the full price upfront. With the election, a GBP 300,000 valued home is taxed as a GBP 300,000 purchase from the start.
Full answer
Shared ownership buyers from an approved provider have two SDLT choices in England and Northern Ireland. Option one is a market value election: you pay SDLT upfront on the full market value of the property, and then no further SDLT is due on later staircasing, even as you buy more shares. Option two is to pay in stages: you pay SDLT only on the share you buy now (and any rent element if it crosses thresholds), then pay again only once your cumulative ownership passes 80%. Worked example with the market value election on a property valued at GBP 300,000 where you buy a 40% share: you elect to be taxed on the full GBP 300,000, paying 0% on the first GBP 125,000, 2% on the next GBP 125,000 = GBP 2,500, and 5% on the final GBP 50,000 = GBP 2,500, a total of GBP 5,000, with nothing more to pay as you staircase. First-time buyer relief can apply if the value is GBP 500,000 or less. The election is irrevocable, so model both routes carefully. Use the stamp-duty calculator and the shared-ownership calculator to compare, then confirm the rules with your provider and gov.uk.
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This answer is informational only and does not constitute financial, tax or legal advice. Figures are for the 2025/26 UK tax year. See our methodology and sources.