Introduction: Why an Accelerated Payment Notice Hits Americans Twice
An accelerated payment notice demands money from you within 90 days, offers no right of appeal, and arrives while the underlying tax is still genuinely in dispute. British advisers treat that as a cash-flow problem. For an American in Britain it is worse, because the United States refuses a foreign tax credit for a contested liability. Consequently, you can wire a six-figure sum to HMRC and get nothing at all on your Form 1116 for the same year.
At TaxYork, we see this collision among hedge fund executives, company owners and City professionals who entered planning arrangements years ago and have watched the enquiry grind on. The British guidance on this subject is competent and plentiful. However, none of it addresses the American half, which is where the real money is lost. This guide covers both halves, including the election that rescues the credit and the ten-year window that saves the years you have already filed.
What an Accelerated Payment Notice Actually Is
An accelerated payment notice is a demand for a payment on account of disputed tax or National Insurance. HMRC issues it while an enquiry or appeal is still running, so the money moves before anybody decides who is right. In effect, the Exchequer holds the disputed sum instead of you.
Importantly, the notice does not decide your case. You keep every appeal right you had against the underlying liability. Nevertheless, you must pay first and argue afterwards, which reverses the usual British position that disputed tax can be postponed.
Who Receives an Accelerated Payment Notice
HMRC directs these notices at people who used arrangements registered under the disclosure rules, people who have received a follower notice, and people caught by a counteraction under the general anti-abuse rule. Therefore, the typical recipient is wealthy, advised, and years into an enquiry.
Recipients of an accelerated payment notice in our client base are usually dual filers with substantial UK employment or partnership income. In particular, they have been claiming foreign tax credits on their US returns throughout, which is exactly why the timing rules matter so much.
How HMRC Issues an Accelerated Payment Notice
The statutory machinery sits in Part 4 of the Finance Act 2014. Furthermore, it is tightly drafted, so the first job on receiving a notice is to test it against the statute rather than assume it is valid.
The Three Conditions in Section 219
Section 219 of the Finance Act 2014 sets out three conditions, and all three must be met. Condition A requires an open enquiry into your return or claim, or an undetermined appeal. Condition B requires that the return or appeal relies on a tax advantage from particular arrangements.
Condition C is the trigger. It is satisfied in three situations. HMRC has given you a follower notice for the same advantage, the arrangements are notifiable under the disclosure of tax avoidance schemes rules, or a counteraction notice has been given under the general anti-abuse rule with at least two panel members finding the arrangement unreasonable. Accordingly, an accelerated payment notice cannot be issued simply because HMRC dislikes your planning.
Partner Payment Notices and Partnership Arrangements
Many of the arrangements that generated these notices were partnerships. For those, HMRC issues partner payment notices to the individual partners rather than a single notice to the partnership. As a result, each partner faces a personal demand calculated on their own share.
This matters for American partners in two ways. Firstly, the notice lands on you personally, not on an entity. Secondly, the US character of that partnership interest, and the basket your credits fall into, depends on your own facts rather than the partnership's UK treatment.
What the Notice Must Tell You
Under section 220, the notice must identify which limb of condition C applies, state the amount HMRC requires, and explain the consequences of non-payment. The amount equals the additional tax that would be due if the asserted advantage were counteracted. Every accelerated payment notice must therefore show its own calculation.
Read that figure carefully. In our experience, arithmetic errors in an accelerated payment notice are more common than people expect, particularly where losses were carried between years or where National Insurance has been swept in alongside income tax.
The 90-Day Clock, Representations and Penalties
Once an accelerated payment notice arrives, a hard timetable starts. Additionally, that timetable runs regardless of whether your adviser is on holiday or your enquiry has been dormant for three years.
Representations Under Section 222
You cannot appeal, but you can make representations. Section 222 gives you 90 days to object on three grounds. Conditions A, B or C were not met, the specified amount should not have been specified, or a surrenderable amount is wrong. HMRC must then confirm, amend or withdraw the notice.
Notably, representations can extend your deadline. Under section 223, the payment period is the later of the original 90 days and 30 days from the date HMRC notifies its determination. Therefore, well-founded representations buy time as well as testing the notice.
The Three Penalties in Section 226
Late payment of an accelerated payment notice is expensive and mechanical. Section 226 imposes 5 per cent of the unpaid amount at the end of the payment period. A further 5 per cent follows after five months from the penalty day, and another 5 per cent after eleven months. Consequently, sustained non-payment costs 15 per cent on top of the tax.
Those percentages apply to the amount demanded, not to your eventual liability. In other words, you can be penalised on a sum that you later prove you never owed.
Interest, Time to Pay and Enforcement
Interest on the underlying debt runs at the HMRC late payment rate, which stands at 7.75 per cent from 9 January 2026. The ICAEW technical guidance makes the same point for accounting purposes. Paying the notice stops that interest accruing on the amount paid. Meanwhile, repayment interest, should you win, runs at just 2.75 per cent.
That spread is the quiet cost of the regime. Furthermore, HMRC's own guidance on what to do when you receive one of these notices encourages early contact where payment is difficult, and time to pay arrangements are available for genuine hardship.
Funding the Payment Without Creating a Second Tax Bill
Wealthy clients rarely hold a six-figure sum in cash. Consequently, the payment is often funded by selling listed investments, drawing from a company, or realising a currency position, and each of those routes carries its own tax cost in one or both countries.
Selling assets to fund an accelerated payment notice can crystallise a US capital gain, the 3.8 per cent net investment income tax, and a sterling currency gain that Britain ignores entirely. Similarly, taking money out of your own UK company may create a distribution or a loan charge that reaches back into your Form 1040. Therefore, plan the funding route alongside the payment itself, not afterwards.
Why You Cannot Appeal an Accelerated Payment Notice
The absence of an appeal right against an accelerated payment notice is the feature that surprises people most. Moreover, the courts have tested it repeatedly and the regime has survived.
Judicial Review Is the Only Direct Challenge
There is no tribunal appeal against an accelerated payment notice, so the only direct route is judicial review in the High Court. Challenges based on retrospectivity, legitimate expectation and human rights arguments have generally failed. Consequently, a challenge now needs a specific defect, not a general objection to the policy.
That said, a defective notice is still a defective notice. Where condition C is not made out, or the scheme reference relied upon does not cover your arrangements, the point is worth taking quickly and in writing.
Haworth and the Limits on Follower Notices
The follower notice route has been curbed. In R (Haworth) v HMRC, the Supreme Court upheld the quashing of a follower notice. HMRC must believe there is no scope for a reasonable person to disagree that the earlier ruling denies the advantage. Therefore, where your accelerated payment notice rests on a follower notice, the strength of that underlying notice matters directly.
Follower notice penalties are also material in their own right. Section 209 sets the penalty at 30 per cent of the denied advantage. A further 20 per cent applies where a tribunal finds the dispute was continued unreasonably, while section 210 allows reductions for co-operation.
The Penalty Appeal Dead End
You can appeal a section 226 penalty, but you cannot use that appeal to attack the validity of the notice itself. The Court of Appeal confirmed that a collateral challenge of this kind fails, and that believing a notice invalid is not a reasonable excuse for not paying. Accordingly, paying under protest and pursuing the substantive dispute is usually the disciplined course.
Where an Accelerated Payment Notice Comes From: DOTAS and the Scheme Reference Number
Most accelerated payment notices trace back to the disclosure of tax avoidance schemes rules. Understanding that chain helps you predict the demand, and it exposes a US filing duty that almost nobody connects to it.
The Scheme Reference Number on Your Tax Return
Where an arrangement is notifiable, the promoter registers it and HMRC issues a scheme reference number. You then report that number on your Self Assessment return for every year you benefit from the arrangement, as HMRC's disclosure guidance explains. Consequently, HMRC can identify every user of a registered scheme without opening a single enquiry.
That reporting is also the trigger under condition C. In other words, the number you wrote on your return years ago is what makes an accelerated payment notice available to HMRC today.
The US Disclosure Nobody Mentions
American filers face a parallel regime. The United States requires disclosure of reportable transactions on Form 8886, and the penalties under section 6707A are severe and separate from any tax. The IRS sets out the categories in its guidance on abusive tax shelters and transactions. Therefore, an arrangement that was notifiable in Britain deserves a deliberate US analysis rather than an assumption that it falls outside the American rules.
The two regimes do not mirror each other, and a UK scheme reference number does not automatically create a US reporting duty. Nevertheless, the overlap is real where the arrangement produced a loss or a deduction that also appeared on your Form 1040. We recommend reviewing the point before HMRC forces the issue.
Why Settlement Opportunities Change the American Answer
HMRC periodically offers settlement terms to users of particular arrangements. Settling ends the contest, which matters enormously for an American, because a finally determined liability is creditable in the year the tax was remitted. As a result, a settlement can unlock a credit that an accelerated payment notice alone could not.
Model that before you accept or decline. Specifically, compare the UK cost of settling against the value of converting a stranded provisional credit into a settled one, including the basket and carryforward position.
The US Side: An Accelerated Payment Notice Earns No Immediate Credit
Here is the part of the accelerated payment notice analysis that no British guidance covers. For an American, paying the notice does not automatically produce a foreign tax credit, and assuming otherwise creates a large overstatement on Form 1116.
The Contested Tax Rule
Treasury Regulation section 1.901-2(e)(2) is blunt. A contested foreign income tax liability is not a reasonable approximation of the final liability. As a result, it is not treated as tax paid for credit purposes until the contest is resolved. An accelerated payment notice is, by definition, money paid while you contest.
The consequence is stark. You have remitted the cash, HMRC holds it, and yet your Form 1116 shows nothing for that payment. Meanwhile, the IRS still taxes the income the arrangement was meant to shelter.
The Provisional Credit Election
Fortunately, there is a route through. Regulation section 1.905-1(c)(3) lets a cash-basis taxpayer elect to claim a provisional credit in the year the contested amount is remitted. The liability need not be finally determined. In practice, that converts a dead payment into a live credit.
The election carries obligations, and the full regulation text sets them out. You file the agreement required by the regulation with your Form 1116, and you provide an annual notice for every later year up to and including the year the contest ends. Therefore, an accelerated payment notice creates a multi-year compliance task, not a single-year adjustment.
National Insurance Inside the Notice Never Credits
Many notices sweep in National Insurance alongside income tax. National Insurance is not an income tax for credit purposes, and the US-UK totalisation agreement removes the double charge rather than making the contributions creditable. Consequently, that slice of your payment earns no US relief at all, whatever happens to the dispute.
Separate the two figures before you plan anything. In our experience, clients routinely model the whole demand as creditable, which overstates the recoverable amount by whatever the National Insurance element happens to be.
Timing, Baskets and the Ten-Year Window
Even where an accelerated payment notice produces a credit, the year it lands in rarely matches the year the income arose. Additionally, the limitation rules can strand most of it.
Which Year the Credit Belongs To
For a cash-basis taxpayer, foreign tax is creditable in the year of payment. Consequently, a payment made under an accelerated payment notice in 2026 belongs to your 2026 Form 1116, even where the disputed income arose in 2019 or 2020. The credit is placed in the basket matching that income, usually the general category for employment or trading arrangements.
That mismatch is the core planning problem. Your 2026 limitation depends on your 2026 foreign-source income, so a large historic payment can easily exceed the room available.
Carrybacks, Carryforwards and the Section 6511 Window
Excess credits carry back one year and forward ten, as IRS Publication 514 sets out. Furthermore, where a contest resolves years later, the tax is treated as paid in the year it was remitted. You therefore amend that year, not the year the dispute ended. Section 6511(d)(3) provides a special ten-year period for foreign tax credit claims, which is what makes the amendment possible long after the ordinary refund window has closed.
Our guide to the HMRC statutory review and its effect on your US tax credit explains the parallel choice in an ordinary enquiry, where postponing the UK tax can leave you with no credit and no election.
If You Lose: Closure Notices, Interest and the Final Credit
Most of these disputes end in HMRC's favour, so plan for that outcome. When the enquiry closes, HMRC issues a closure notice amending your return, and the accelerated payment is set against the confirmed liability. Furthermore, interest at the late payment rate runs on any shortfall from the original due date, and behaviour-based penalties can follow where HMRC considers the arrangement careless or deliberate.
For your US return, losing is actually the simpler outcome. The contest has ended, so the tax paid under the accelerated payment notice becomes creditable, treated as paid in the year you remitted it. Consequently, you amend that year, claim the credit, and carry any excess back one year or forward ten. Where you made the provisional election, the amendment merely confirms what you already claimed.
When HMRC Repays You
If you win, HMRC returns the money with repayment interest. That refund is a foreign tax redetermination under section 905(c), so you must notify the IRS and unwind any credit already claimed. Our note on what happens when HMRC changes your bill after you have filed sets out the mechanics and the penalties for failing to report one.
The repayment interest itself is taxable in both countries. Therefore, a successful challenge still leaves you with a modest income item to report, and with the opportunity cost of the years HMRC held your money.
If You Have Already Filed Without the Election
Many clients reach us a year or two after paying, having claimed nothing. The position is usually recoverable, because the ten-year window for foreign tax credit claims is far longer than the ordinary three-year refund period. Accordingly, an amended return can still put the provisional credit, or the settled credit, into the correct year.
Speed still matters. The annual notice obligation runs from the year of the election, and reconstructing exchange rates, payment evidence and basket allocations becomes harder with every year that passes. Our team rebuilds those schedules regularly for clients whose earlier returns were prepared without any cross-border analysis at all.
What to Do in the First 90 Days
The window on an accelerated payment notice is short, so sequence matters. Above all, do not let the US analysis wait until the following filing season.
Test the Notice Before You Pay
Check that an enquiry or appeal is genuinely open before you treat the accelerated payment notice as valid, that the arrangements named match what you actually did, and that the scheme reference or follower notice relied upon is the right one. Then recalculate the amount, separating income tax from National Insurance. If anything fails, make representations in writing within the 90 days.
Decide the US Election Before the Money Moves
Model your 2026 general-basket limitation with and without the provisional credit election. Additionally, look at the prior year, because the one-year carryback may absorb more of the credit than the current year can. Where the election clearly helps, prepare the agreement and the annual notice schedule at the same time as the payment.
If You Have Moved Back to America
Relocation does not end the exposure. HMRC can still issue an accelerated payment notice for a year when you were UK resident, and it will find you through the treaty exchange of information network. Therefore, a move to New York or Miami changes the logistics rather than the liability.
The move does change the credit arithmetic, though. Your foreign-source income falls after you leave, which shrinks the Form 1116 limitation in exactly the years the payment lands. Additionally, several states, California among them, grant no credit for foreign tax at all, so a state return can tax income that Britain has already taxed twice over. We model both layers before recommending when to pay.
Keep Both Records Aligned
Keep the accelerated payment notice, the representations, HMRC's determination, the payment confirmation and the eventual closure notice in one file. Consequently, when the contest resolves, you can amend the correct US year quickly and evidence every figure. Clients who run this properly also find it easier to handle a parallel enquiry, as our note on HMRC closure notices for US filers explains.
Case Study: A £412,000 Accelerated Payment Notice
The following illustrative example reflects the accelerated payment notice pattern we see. Names and details are changed, and the figures are simplified.
The Notice
Michael is 51, a US citizen and the chief operating officer of a London hedge fund. He has lived in Britain since 2011 and files in both countries. In 2019 he entered a partnership arrangement registered under the disclosure rules. It generated relief against his UK income for 2019 and 2020. HMRC opened an enquiry in 2021 and it remains open.
In March 2026 HMRC issued an accelerated payment notice for £412,000. Of that, £374,000 was income tax and £38,000 National Insurance. The payment period ended in June 2026. Michael made representations on the arithmetic, HMRC amended the figure slightly, and he paid.
The American Problem
Michael assumed the payment would produce a $500,000 foreign tax credit. It did not. Because he is contesting the liability, the default position gave him no credit at all for 2026. Meanwhile, his US return still taxed the income the arrangement had sheltered in Britain.
Three further points shaped the answer. The £38,000 of National Insurance was never creditable. His 2026 general-basket limitation left room for only about $40,000 of additional credit, because his PAYE credits already absorbed most of it. Finally, the enquiry was unlikely to conclude before 2029.
The Outcome
We filed the provisional credit election with his 2026 Form 1116. It claimed the £374,000, roughly $499,000 at the rate used, as a provisional credit. About $40,000 was usable in 2026. The one-year carryback absorbed a further $31,000 against 2025, and the balance of roughly $428,000 became a carryforward with ten years to run.
We also diarised the annual notice required for every year until the contest ends. In addition, we flagged the section 905(c) reporting that will follow if HMRC repays. Ultimately, Michael recovered $71,000 of immediate value and preserved the rest. The alternative was claiming nothing and losing the 2026 year entirely.
How TaxYork Can Help
TaxYork provides comprehensive US and UK tax preparation for wealthy Americans in Britain, dual nationals and company owners. When an accelerated payment notice arrives, we test it against the statutory conditions and check the arithmetic. We also separate the National Insurance element that will never earn a credit. Furthermore, we model your Form 1116 limitation before the money leaves your account.
We then prepare the provisional credit election and the annual notices it requires. Furthermore, we coordinate the amended returns when the contest resolves and handle the redetermination reporting if HMRC repays. Our specialists also support clients through parallel investigations, including the Code of Practice 8 civil investigation route and ongoing US tax return preparation for expats.
Conclusion
An accelerated payment notice removes the choice British taxpayers normally have. You pay within 90 days, you cannot appeal, and penalties of 5 per cent apply three times over if you delay. For Americans, the sting is the credit, because contested tax earns nothing until the dispute ends unless you elect otherwise.
Therefore, treat the notice as two deadlines rather than one. Test the UK position and make representations inside the statutory window. Then settle your US election before the payment leaves. Get both right and a painful cash-flow event stays a cash-flow event, rather than becoming permanent double taxation.
Contact Us
If HMRC has issued you an accelerated payment notice, or warned you that one is coming, book a consultation with our US-UK specialists. You can also email hello@taxyork.com or call 020 3488 8606. We will review the notice, quantify the creditable element and prepare the elections your US return needs.
Disclaimer
This article is provided for general information only and does not constitute tax, legal or financial advice. Tax rules in the United States and the United Kingdom change frequently, and their application depends on your individual circumstances. The case study is illustrative and the figures are simplified. You should obtain professional advice before acting on any information in this article. TaxYork accepts no liability for any loss arising from reliance on this content. Official sources referenced include HMRC guidance on follower notices and accelerated payments, the IRS foreign tax credit guidance and IRS Publication 514.