Your situation
Stamp duty on shared ownership homes
England and Northern Ireland let shared owners choose how SDLT is charged; the choice is made once, on the first return.
Checked by Radif Partners · Editorial policy · How we calculate
A shared owner in England or Northern Ireland chooses between two ways of paying Stamp Duty Land Tax. With the market value election, tax is paid once on the full market value stated in the lease, £10,000 on a £400,000 home at standard rates, and nothing more is due when you buy further shares. Paying in stages charges only the price of the share bought now: £700 on a 40% share of the same home. Later shares cost nothing until your ownership goes above 80%; the share that crosses that line is taxed on the total paid so far, pro rata. First-time buyers can claim the relief either way if the full market value is £500,000 or less, which brings the election on this home to £5,000. Scotland and Wales have their own shared ownership rules, which this page does not model.
SDLT now, for a 40% share costing £120,000
Market value election
£0
Paid once on £300,000; nothing more when you buy further shares.
Paying in stages
£0
On the share price only; tax may fall due again once you own more than 80%.
First-time buyer rates apply: the market value is £500,000 or less.
Example of a later step in stages: a final 25% share (£75,000) bought after a further 20% would cost about £808 at today’s standard rates.
Rent under the lease is left out: with first-time buyer relief no tax is due on it; otherwise SDLT on rent is 1% of its net present value above £125,000.
The two routes in figures
| Full market value | Election, standard | Stages, 40% share | Election, first-time | Stages, first-time |
|---|---|---|---|---|
| £200,000 | £1,500 | £0 | £0 | £0 |
| £280,000 | £4,000 | £0 | £0 | £0 |
| £400,000 | £10,000 | £700 | £5,000 | £0 |
| £450,000 | £12,500 | £1,100 | £7,500 | £0 |
| £550,000 | £17,500 | £1,900 | £17,500 | £1,900 |
On a cheap home the election costs little, sometimes nothing, and buys certainty: every future share is free of SDLT. At £280,000, the GOV.UK example, it costs £4,000 at standard rates. On an expensive one the stages route spreads the tax and may avoid part of it if you never staircase far. Above £500,000 of market value, the first-time buyer columns fall back to standard rates.
Staircasing past 80%
Under the stages route, buying extra shares is free until the purchase that takes you above 80%. That step, and every later one, is taxed in a particular way: SDLT is worked out on the total you have paid for all your shares so far, then multiplied by the fraction that the new share represents. The GOV.UK example uses £260,000 paid in total, of which a final tranche of £65,000: the tax on the total is £3,000 and the tranche bears £750. Keep the completion statement of every share you buy, because the total paid so far is the base of every later calculation, possibly years after your first purchase.
First-time buyers and the £500,000 test
The relief is open to both routes, but the test is the full market value, not your share. A £450,000 home bought with the election costs a first-time buyer £7,500 once (HMRC manual SDLTM29880). If the market value exceeds £500,000, the relief is unavailable even for a small share, and the ordinary rules for first-time buyers lose their effect. Every buyer on the lease must qualify, as in any joint purchase.
Rent under the lease
A shared ownership lease carries rent on the part you do not own. SDLT on a new residential lease can also be due on rent, at 1% of its net present value above £125,000. The calculator leaves rent aside; your conveyancer computes the net present value from the lease.
Scotland and Wales
Revenue Scotland and the Welsh Revenue Authority apply their own rules to shared ownership, and they differ from the SDLT election described here. We do not show figures for them. Start with Revenue Scotland’s residential guidance or the Welsh Revenue Authority’s LTT guide, and ask your solicitor to confirm the treatment before completion.