When do the higher rates for additional dwellings apply?
The test is what you own once completion day has passed, anywhere in the world. If at that point you hold a major interest in more than one dwelling, the higher rates apply to the whole price of the new one, not just the part above a threshold. A dwelling includes a house, a flat, a holiday home and a property let to tenants. It includes a share in a property you inherited with siblings, and a home you own with a former partner but no longer live in.
Small interests are ignored. An interest worth less than 40,000 pounds does not count, under Schedule 4ZA paragraph 3 to the Finance Act 2003, read on legislation.gov.uk on 20 September 2026. Nor does a share you inherited JOINTLY with others, provided your share is 50 per cent or less, for three years beginning with the date of the inheritance, under paragraph 16. A house you inherited on your own is not disregarded at all. One more is often read backwards: what is ignored is an interest you hold as landlord where the flat is let on a lease with MORE than 21 years still to run, not a short lease you hold yourself. A short lease you hold is still an interest and still counts if it is worth 40,000 pounds or more.
In England the surcharge comes from Schedule 4ZA to the Finance Act 2003, introduced in 2016. In Wales the Welsh Revenue Authority runs the equivalent higher residential rates of Land Transaction Tax. The structure is the same; the rates, thresholds and deadlines are not. The stamp duty calculator covers the ordinary rates that these sit on top of.
| You already own | Higher rates on the new purchase? |
|---|---|
| Nothing at all, anywhere | No |
| Your main home, sold on or before completion of the new one | No, you are replacing your main residence |
| Your main home, sold after completion of the new one | Yes, paid up front; reclaimable if the old home sells within the statutory window |
| A buy to let, and you are buying a home to live in for the first time | Yes; you had no main residence to replace |
| An inherited share above the disregard limits | Yes |
| A property abroad | Yes |
| Nothing, but your spouse or civil partner owns a property | Yes |
| A property held through a company you control, buying personally | Not normally, because the company is a separate owner and Schedule 4ZA has no company look-through; but a company holding as your nominee is looked through, and the company's own purchases are caught in their own right. Take advice before relying on this |
What if you are replacing your main residence?
This is the exception that matters to most families. Sell your previous main residence on or before the day you complete the new one, and the higher rates do not apply even if you own other property, provided the new home will be your main residence. The old home must have been your only or main residence at some point in the three years ending with the day you complete the new one, under Schedule 4ZA paragraph 3 to the Finance Act 2003, checked 20 September 2026.
Complete the new home first and sell the old one later, which is what happens whenever a chain breaks, and you pay the higher rates on the new purchase in full. You can then reclaim the difference once the old home sells, provided the sale completes within three years beginning with the day after you completed the new purchase, under Schedule 4ZA paragraph 3(7A) to the Finance Act 2003, checked 20 September 2026. There is a statutory extension where exceptional circumstances you could not reasonably have foreseen prevented the sale.
The refund is a positive claim to HMRC, or to the Welsh Revenue Authority, with its own time limit. In England you amend the return within twelve months beginning with the day you completed the sale of the old home, or if later the filing date for the original return, under Schedule 4ZA paragraph 8(3). Wales runs to a different deadline under Schedule 5 paragraph 23(6) to the Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017, so do not carry the English date across. Checked 20 September 2026. Nobody prompts you. Diarise it on the day you complete.
A main residence is a question of fact, not choice. There is no election, unlike capital gains tax. HMRC looks at where you and your family actually live, where you vote and get post. A property you let out has stopped being your main residence, and selling it later does not bring the exception into play.
Do joint buyers and spouses count as one?
Joint buyers are tested one by one, and if any of them would be liable, the whole purchase pays the higher rates. Spouses and civil partners go further: they are treated as a single buyer, so a property in your husband's, wife's or civil partner's sole name counts as yours. Buying in one name to keep the surcharge off does not work. Separated couples can fall outside the rule, because the Schedule 4ZA test asks whether they are living together, applying section 1011 of the Income Tax Act 2007: not living together means separated under a court order or a deed of separation, or separated in circumstances likely to be permanent. Checked 20 September 2026.
Buying in a child's name only helps if the child genuinely buys and owns, with their own money or a documented gift, and you keep no interest. Where a parent funds it and keeps the benefit, that is a trust, and the parent is the buyer.
Do companies pay the higher rates?
Yes, from the first purchase, with no replacement exception. A company buying a single dwelling for more than 500,000 pounds can face a flat rate of 17 per cent instead, under Schedule 4A paragraphs 1(2) and 3(1)(a) to the Finance Act 2003, read on legislation.gov.uk on 20 September 2026. Reliefs exist for a genuine property rental or development business and have to be claimed. In England a buyer who is not UK resident pays a further 2 per cent on top, under section 75ZA and Schedule 9A, in force since 1 April 2021; the test is whether you were present in the UK for at least 183 days in the 365 days ending the day before completion. Wales has no equivalent surcharge. A buyer who meets the residence test only after completing can claim the 2 per cent back, and the claim has its own time limit, so diarise the date you qualify. First time buyer relief is never available where the higher rates apply.
Mixed use property, a shop with a flat above, a house with farmland, is charged at non-residential rates and escapes the surcharge, but HMRC challenges claims where the non-residential part is token. There is no size limit and no reasonable enjoyment test in the Finance Act 2003; whether attached land is garden or grounds is a question of fact fought case by case, so the facts have to be genuine. A granny annexe can cut either way: two dwellings, or a subsidiary dwelling that keeps the surcharge off. It is subsidiary where it sits within the grounds of, or in the same building as, the main dwelling and the price attributable to the main dwelling is at least two thirds of the combined price, under Schedule 4ZA paragraph 5, checked 20 September 2026. There is no test about the number of storeys.
How is the surcharge paid, and how does Wales differ?
Your conveyancer files the return and pays the tax from your completion funds. England allows fourteen days from the effective date, which is usually completion but falls earlier if the contract is substantially performed first; Wales gives thirty. In both, the tax is due by the same date as the return (Finance Act 2003 sections 76 and 86, and sections 44 and 57 of the Welsh Act of 2017, checked 19 September 2026). The return asks whether the higher rates apply and you sign the declaration, so we ask every buyer in writing whether they or their spouse own any other dwelling anywhere, and whether a previous main residence has sold or is still to sell.
Wales has its own higher residential rates, its own thresholds and its own refund rules. The shape is the same, including the replacement exception, but the figures differ and the rules are not interchangeable. Which regime applies depends on where the property is, not where you live.
Raise anything unusual before exchange, not after completion. A holiday home abroad, an inherited share, a company purchase, a separation: tell your conveyancer at the outset and ask for the analysis in writing. Once contracts are exchanged there is no room to restructure. A buy to let purchase nearly always attracts the higher rates, and a transfer of equity can too, because assumed mortgage debt counts as the price paid.