Stamp Duty Non-Resident Surcharge US Buyers: 2026 Guide
The stamp duty non-resident surcharge US buyers face uses a residence test unique to SDLT. Learn the 183-day rule, 14-day deadline and refund route.
A threshold test unique to stamp duty
An American buying residential property in England or Northern Ireland almost always pays the 2% non-resident SDLT surcharge, because the stamp duty non-resident surcharge US buyers face is decided by a blunt 183-day physical presence test that exists only in stamp duty law. It is not the Statutory Residence Test, it stacks on the 5% additional-property rate, and it is refundable.
What the 2% non-resident surcharge actually is
Since 1 April 2021, Schedule 9A of the Finance Act 2003 has imposed an extra 2 percentage points of Stamp Duty Land Tax on the purchase of a major interest in a dwelling in England or Northern Ireland by a non-UK resident buyer. It is not a separate tax with its own return. It is an uplift applied to every rate band of the residential table, charged on the whole chargeable consideration, and it is reported on the same SDLT1 return your conveyancer submits within 14 days of completion.
Three features make it disproportionately painful for American purchasers. First, it applies on top of, not instead of, the 5% higher rates for additional dwellings — and a house you own in Connecticut counts as an additional dwelling. Second, the residence test that triggers it has almost nothing in common with the residence test you already know from your UK income tax position. Third, it is genuinely reclaimable, but only within a window that closes quietly, and most US buyers discover the refund route long after their conveyancer has closed the file.
Jungle Tax prepares the US and UK filings for Americans buying and holding UK property, and the surcharge is where we see the most avoidable cash leakage — not because clients pay tax they do not owe, but because they fail to reclaim tax they were never ultimately liable for.
Why is the SDLT residence test different from the Statutory Residence Test?
This is the single most misunderstood point in the whole regime, and it is where generalist guidance is weakest. The Statutory Residence Test (SRT) that governs your UK income tax and capital gains position is an elaborate machine: automatic overseas tests, automatic UK tests, sufficient ties, split-year treatment, work-day counting, exceptional circumstances, and — for Americans — the tie-breaker article of the US-UK double tax treaty sitting on top of it.
The SDLT test discards all of that. For SDLT purposes you are non-UK resident in relation to a transaction if you were present in the UK on fewer than 183 days in a relevant 365-day period. Presence is tested at the end of the day: if you are in the UK at midnight, that is a day. There are no ties. There is no split-year concept. There is no exceptional-circumstances let-out. There is no treaty override, because the surcharge is not an income tax and the treaty's residence article does not reach it.
The practical consequence is that a US executive who is unambiguously UK resident under the SRT — because of family, accommodation and work ties, on 100 UK days — can still be non-UK resident for SDLT and pay the surcharge in full. The reverse also happens: a US-based buyer with no UK life at all can be UK resident for SDLT purposes purely by spending six months in the country either side of completion.
SDLT residence test versus the Statutory Residence Test
| Feature | SDLT non-resident surcharge test | Statutory Residence Test (income tax / CGT) |
|---|---|---|
| Core measure | Days of physical presence only | Days plus ties, work patterns, accommodation, family |
| Threshold | 183 days in the relevant 365-day period | Varies: 16, 46, 91, 183 days depending on which test applies |
| Day counted when | Present in the UK at the end of the day (midnight) | Present at midnight, with transit and deeming rules |
| Measurement period | Rolling 365 days that may straddle completion | UK tax year, 6 April to 5 April |
| Split-year treatment | Not available | Available in eight defined cases |
| Exceptional circumstances | No relief | Up to 60 days may be disregarded |
| Treaty tie-breaker applies | No | Yes, under the US-UK treaty residence article |
| Territory counted | The whole UK, including Scotland and Wales | The whole UK |
| Can be satisfied after the event | Yes, retrospectively, triggering a refund | No, the year is the year |
Note the last row, because it is the reason the refund route exists at all. The SDLT test is uniquely forward-looking: it lets you become resident after you have bought. Nothing in the SRT works that way.
How the relevant 365-day period works
For an individual, the qualifying period runs from 364 days before the effective date of the transaction to 365 days after it. Within that roughly two-year span, HMRC asks whether there is any continuous period of 365 days in which you were present in the UK on at least 183 days. If there is, you are UK resident in relation to that transaction and no surcharge is due.
Two consequences follow. If you have already spent 183 days in the UK in the twelve months before completion, the surcharge simply does not apply and your conveyancer should not be flagging you as non-resident on the return. If you have not, the surcharge is payable at completion — but the window remains open for a further twelve months, and reaching 183 days in any qualifying 365-day stretch inside that window converts the payment into a refundable overpayment.
Because the window straddles completion, days on either side count towards the same continuous stretch. A US buyer who spent 90 days in the UK in the six months before exchange and then relocates permanently three months after completion will very often clear 183 days inside a single continuous 365-day period without ever intending to plan for it. Day counting therefore needs to start before you exchange, not after you receive a refund invitation that never arrives.
What counts as the effective date?
The effective date is normally completion, but it can be earlier if the contract is substantially performed first — typically when the buyer takes possession, or pays a substantial amount of the consideration. This matters enormously for off-plan London new-builds, which are a staple of the US buyer market. A large deposit structure on an off-plan contract can pull the effective date, the 14-day filing deadline and the entire 365-day residence window forward by months or years relative to the date you actually get the keys. Getting the effective date wrong misdates the refund window as well as the return.
How the surcharge stacks with the additional-property rates
The 2% surcharge is not an alternative to the 5% higher rates for additional dwellings; the two are cumulative. The additional-dwellings rate rose from 3% to 5% for transactions with an effective date on or after 31 October 2024, and the standard nil-rate band returned to £125,000 from 1 April 2025. The result is that a non-resident American who already owns a home anywhere in the world — and virtually every HNW US buyer does — is charged 7 percentage points above the base residential table.
Crucially, "anywhere in the world" means exactly that. A property in Texas, a Florida condominium, a co-op share treated as a dwelling, or a part-share in a family home can all push you into the higher rates. There is no carve-out for US property, and the replacement-of-main-residence exception is difficult for a non-resident to satisfy because it requires the disposal of a previous main residence within the statutory period.
Combined 2026 residential SDLT rates for US buyers
| Consideration band | UK resident, single dwelling | Non-resident, single dwelling | Non-resident, additional dwelling |
|---|---|---|---|
| Up to £125,000 | 0% | 2% | 7% |
| £125,001 to £250,000 | 2% | 4% | 9% |
| £250,001 to £925,000 | 5% | 7% | 12% |
| £925,001 to £1,500,000 | 10% | 12% | 17% |
| Above £1,500,000 | 12% | 14% | 19% |
Worked example. A US-resident executive living in New York, who retains the family home in Westchester, buys a £2,000,000 flat in Marylebone. The additional-dwellings rates apply because of the US property, and the non-resident surcharge applies because she has spent only 40 days in the UK. Her SDLT is £8,750 on the first £125,000, £11,250 on the next £125,000, £81,000 on the slice to £925,000, £97,750 on the slice to £1,500,000 and £95,000 on the balance — £293,750 in total, or 14.7% of the price. Of that, exactly £40,000 is the non-resident surcharge, and that £40,000 is the amount at stake in any refund claim.
Scale it down and the arithmetic is no gentler. On a £1,000,000 purchase in the same circumstances the charge is £113,750, of which £20,000 is the surcharge. On a £1,000,000 purchase by a non-resident American who owns no other dwelling anywhere, the charge is £63,750 against £43,750 for an equivalent UK-resident buyer — again a clean £20,000 of surcharge.
The 14-day return deadline and who is actually liable
You have 14 days from the effective date to file the SDLT return and pay the tax. In practice your conveyancer files the SDLT1 and settles from completion monies, but the statutory obligation is the purchaser's, and so is the penalty exposure. A return up to three months late attracts a fixed penalty, rising at twelve months, with daily and tax-geared penalties beyond that, and interest runs on unpaid tax from day 15 regardless. HMRC's published guidance on penalties and interest on a late SDLT return sets out the current schedule.
Fourteen days is a compressed timetable for a cross-border buyer. It is not long enough to research your own day count from scratch, obtain a copy of a US property deed to determine whether the higher rates apply, or resolve whether a part-owned property counts as a major interest in a dwelling. The day count and the additional-property analysis should be settled before exchange, and handed to the conveyancer as a documented position rather than a box tick on a form.
A further trap: the SDLT1 asks the conveyancer to state whether the buyer is non-UK resident. Many US buyers answer that question by reference to their income tax status, or to their visa, or to where they file a return. All three are the wrong test. An incorrect answer either overpays the surcharge or files an inaccurate return, and only one of those two errors is refundable without penalty exposure.
How do you claim the 2% surcharge back?
The refund is claimed by amending the original SDLT return, not by writing a letter. HMRC's Stamp Duty Land Tax Manual at SDLTM09960 and the guidance on rates of SDLT for non-UK residents set out the mechanism. The amendment must be made within two years of the effective date of the transaction, and the claim can only be made once the 183-day condition has actually been met.
The practical sequence for a US buyer relocating to the UK looks like this.
- Fix the effective date. Confirm whether it is completion or an earlier substantial performance date, because both the two-year amendment deadline and the 365-day residence window run from it.
- Build the day count contemporaneously. Boarding passes, passport stamps, entry and exit records, and a dated log. Midnight presence is the test, so arrival and departure days need individual treatment, not a rounded estimate.
- Identify the qualifying 365-day period. It can start anywhere between 364 days before and day one after the effective date. There is often more than one qualifying period; you only need one.
- Confirm every purchaser qualifies. On a joint purchase the refund cannot be claimed until all purchasers have reached UK resident status. One spouse hitting 183 days is not enough unless the married-couple rule applies.
- Amend the return and claim. Quote the transaction reference from the SDLT5 certificate, evidence the day count, and expect HMRC to ask for it.
The two-year amendment deadline is generous relative to the twelve-month residence window that sits inside it, so the binding constraint is almost always the day count, not the filing deadline. If you have not reached 183 days by day 365 after the effective date, no amount of time left on the two-year clock helps you.
Who counts as the purchaser: joint buyers, spouses and companies
Where property is bought jointly, if any purchaser is non-UK resident in relation to the transaction, the surcharge applies to the whole purchase. There is no apportionment by beneficial share. The important exception is for spouses and civil partners who are living together: if one is UK resident in relation to the transaction, both are treated as UK resident. For an American married to a UK-resident partner, this single rule can eliminate the surcharge entirely, and it is regularly missed on returns where the American is named first on the contract.
For companies, the test is corporation tax residence, with an anti-avoidance overlay: a UK-incorporated close company under non-UK resident control can be treated as non-resident. Non-resident companies buying dwellings above £500,000 may also face the flat 15% rate where no relief applies, which the surcharge lifts to 17% — a rate that makes corporate ownership of a single London home very expensive before you reach the annual tax on enveloped dwellings.
Crown employees serving overseas — armed forces, diplomatic staff and certain overseas civil servants subject to UK income tax on their employment — are treated as UK present for the relevant period. This does not assist US citizens working for US government agencies in London.
England and Northern Ireland only: Scotland and Wales differ
SDLT does not apply in Scotland or Wales. Scotland charges Land and Buildings Transaction Tax and Wales charges Land Transaction Tax, and neither devolved tax imposes a non-resident surcharge. Both do impose their own additional-dwelling supplements, which are substantial in their own right. For a US buyer weighing an Edinburgh townhouse against a London flat, the absence of the 2% surcharge north of the border is a real difference in acquisition cost — and one that changes nothing at all about the US tax treatment of the same purchase.
The US side: what the IRS does with a surcharge you paid to HMRC
This is the half of the question that UK property pages consistently ignore, and it is where the money is for American buyers.
Is the surcharge deductible or creditable in the US?
No. SDLT, including the surcharge, is a transfer tax on acquisition, not an income tax. It generates no foreign tax credit under Internal Revenue Code section 901, because there is no income tax paid. It is not deductible as a foreign real property tax. What it does do is add to the US cost basis of the property, translated into dollars at the spot rate on the effective date. That basis addition is real but deferred: it reduces the gain when you eventually sell and is worth roughly its capital gains rate, decades later, in nominal dollars.
The corollary is that a refunded surcharge must reduce basis. If you claim the £40,000 back from HMRC in year two, your US basis in the property falls accordingly. Buyers who claim a refund and never tell their US preparer end up with an overstated basis and an understated gain on sale — a straightforward error that surfaces years later on audit.
The sterling mortgage trap under section 988
If you fund the purchase with a sterling mortgage, the IRS treats the debt as a separate transaction from the house. When you repay, refinance or remortgage, you realise foreign currency gain or loss under section 988 measured on the dollar value of the principal at drawdown versus at repayment. A dollar that strengthens against sterling between those two dates produces a phantom gain taxed at ordinary income rates — with no offsetting deduction if the currency moves the other way beyond narrow limits, because personal section 988 losses are generally not deductible. The IRS guidance on foreign currency and currency exchange rates is the starting point. Remortgaging a London property is routine in the UK and is a taxable event in the US; the two facts are rarely connected in time to prevent the problem.
Reporting the accounts around the purchase
The property itself is not a foreign financial account, so it is not reported on an FBAR or on Form 8938. The apparatus around it frequently is. A sterling deposit account opened to hold the completion funds, an offset mortgage savings facility, a currency broker's client account, and a service-charge or sinking-fund account for a leasehold block can each be a reportable foreign financial account. Aggregate balances spike at completion, and a single-day peak above the FBAR threshold triggers the filing for the whole year. Our FBAR penalty calculator shows what the exposure looks like when those accounts were missed. The reporting requirements for specified foreign financial assets are set out in the IRS guidance on Form 8938.
Ongoing and exit positions
If you let the property, the UK Non-Resident Landlord Scheme and a UK self-assessment return sit alongside a US Schedule E on which the property is depreciated over 30 years as foreign residential property — a mismatch that produces different taxable profits on each side and a foreign tax credit calculation that has to be built deliberately. On sale, the UK charges non-resident capital gains tax with rebasing available to April 2015 values, while the US taxes the full economic gain from your actual dollar basis, and the section 121 principal residence exclusion is capped where UK private residence relief may be unlimited. Americans who intend to occupy the property should model the exit before completion, not after.
The accidental American who owes no surcharge but has a bigger problem
There is a category of buyer for whom this article inverts. A US citizen or green card holder who has lived in London for years will usually be UK resident under the SDLT test and pay no surcharge at all. What surfaces at the point of purchase is different: the mortgage application, the source-of-funds review and the solicitor's file all generate documentary evidence of US citizenship, foreign accounts and foreign income. For a buyer who has not filed US returns or FBARs, the purchase is often the event that makes the gap undeniable.
The remedy is the IRS Streamlined Foreign Offshore Procedure, which for a qualifying non-wilful taxpayer resolves the back returns and information returns without the offshore penalty. It is a far better outcome than waiting for a FATCA-driven enquiry, and it is much easier to run before a lender or a fund flow makes the position visible. Our IRS streamlined filing team handles these alongside the property work, and our private client practice deals with the wealth and reporting profile that typically sits behind a seven-figure London purchase.
A pre-exchange checklist for US buyers
- Count your UK days for the 364 days before the expected effective date, on a midnight basis, from documentary evidence.
- Project your UK days for the 365 days after. If you are within reach of 183, know it before you complete.
- Determine whether the effective date will be completion or an earlier substantial performance date, particularly on off-plan contracts.
- List every dwelling you or your spouse own anywhere in the world, including part-shares held with family members, to settle the additional-dwellings position.
- Check whether the spouse or civil partner rule removes the surcharge entirely.
- Confirm how the property will be held before exchange. Corporate ownership changes the rate, the annual charges and the US reporting simultaneously.
- Record the dollar spot rate on the effective date and the dollar value of any sterling borrowing drawn down.
- Diarise the refund review for month eleven after the effective date, while the residence window is still open.
None of this takes long. All of it is far cheaper before exchange than after. You can read more of our cross-border work in the Jungle Tax guides library, and the wider US filing obligations that attach to UK property ownership are covered in our US tax services pages.
The bottom line
The 2% non-resident surcharge is a small percentage of a large number, decided by a test that most American buyers have never encountered and that bears no relation to the residence rules governing the rest of their tax life. On a typical London purchase it is a five-figure sum, it is payable within 14 days, and it is recoverable if the day count lands. Whether it lands is usually determined by decisions taken months before exchange and by records kept, or not kept, in the year that follows.
If you are buying UK residential property as a US person, or you have already completed and want to know whether the surcharge you paid is reclaimable, we can review the day count, the effective date, the additional-property position and the US basis and reporting consequences in a single confidential engagement. Contact our cross-border team to arrange a discreet consultation with a specialist who prepares both sides of the return.
