Is Form 2848 the same as HMRC's form 64-8?

No, they are parallel instruments in unconnected systems and neither works in the other jurisdiction. Form 2848 authorises a US-credentialed individual to represent you before the IRS on specific matters, forms and periods. HMRC's 64-8 authorises an agent across the taxes it lists. GOV.UK is explicit that authorising an agent changes nothing about liability: you will still be legally responsible for your own tax.

Form 2848: Authorising a US Preparer From the UK

Q: Can I use the IRS Tax Pro Account if I live in the UK?

No. The IRS eligibility criteria for Tax Pro Account require the taxpayer to have an address in a U.S. state or the District of Columbia, so a UK address rules it out. Your available routes are the Submit Forms 2848 and 8821 Online tool, fax to the International CAF Team, or post to Philadelphia. The IRS also notes Tax Pro Account is for authorization requests to individuals only.

Q: Does Form 2848 expire after seven years?

No. There is no seven-year rule anywhere in the Form 2848 instructions or Publication 947, despite the claim appearing on prominent pages. A Form 2848 runs until you revoke it or the representative withdraws. The genuine time limit is different: the IRS will not record future tax years or periods that exceed three years from December 31 of the year it receives the power of attorney.

Q: Can my London accountant be named on Form 2848?

Only if they hold a US credential. The IRS requires that the individual you authorise be eligible to practise before the IRS, meaning an enrolled agent, a CPA licensed in a US state, possession, territory, commonwealth or the District of Columbia, or an attorney admitted to a US state bar. UK qualifications alone do not qualify. There is no requirement that your representative hold a US address, and you cannot name a firm, only individuals.

Q: Does Form 2848 need to be notarised or apostilled if I sign it in the UK?

No. Nothing in Form 2848, its instructions or Publication 947 requires notarisation, witnessing or an apostille. UK clients often assume otherwise because an Ordinary or Lasting Power of Attorney under the law of England and Wales carries formality requirements. Those are different instruments under different law: a UK power of attorney has no effect at the IRS, and a Form 2848 has no effect at HMRC or a UK bank.

Q: Does Form 2848 cover my FBAR?

It can cover FBAR representation, using Line 3 with the description Matters relating to Report of Foreign Bank and Financial Accounts, the tax form number FinCEN Form 114, and the applicable calendar years. But FBAR is a Line 4 specific use not recorded on the CAF system, so it gives standing in an FBAR examination without switching on transcript access. To have someone e-file the FBAR itself you need FinCEN Report 114a instead.

US tax return preparation for expats does not, by itself, require a Form 2848 at all: preparing and filing your return runs on your engagement with the firm, and Form 2848 is the separate instrument that lets that firm speak to the IRS on your behalf. You need it the moment representation is in play, which for a UK-resident filer usually means a notice, an examination, transcript access, or a Streamlined Foreign Offshore catch-up you want handled end to end.

Three details decide whether a Form 2848 signed in the UK actually works. The IRS Tax Pro Account, the fast real-time route that almost every US-facing guide recommends, is closed to you because it requires a US address. You get 60 days rather than 45 for your representative to countersign. And a signature that is perfectly valid through the IRS online submission tool is invalid on the same form posted from a London letterbox. Get those three wrong and the form comes back, which in a compliance project with a live IRS clock is not a clerical annoyance.

What follows is the line-level detail we work through with clients in London and across the UK, sourced only to the IRS, FinCEN and GOV.UK.

What is Form 2848, and when does US tax return preparation for expats need one?

Form 2848 is the IRS power of attorney. Its official title is Power of Attorney and Declaration of Representative, and the IRS states its purpose plainly on https://www.irs.gov/forms-pubs/about-form-2848: "Use Form 2848 to authorize an individual to represent you before the IRS." The current form revision is January 2021 and the current instructions revision is September 2021.

A Form 2848 is a taxpayer's written authorisation naming a specific individual, eligible to practise before the IRS, to act for that taxpayer on specified tax matters, specified forms and specified periods. Every word in that definition carries weight: specific individual, eligible individual, specified matters, specified periods. A Form 2848 that is vague on any of those points is a Form 2848 the IRS will reject.

For a UK-resident US filer, the situations that genuinely call for one are narrower than most people assume:

An IRS notice or examination touching a return you have already filed.
A Streamlined Foreign Offshore submission where you want the firm to field IRS correspondence about the package.
An FBAR examination, which is scoped differently from an income tax matter.
Transcript access, where the firm needs to see what the IRS holds before rebuilding a filing history.
A US entity matter belonging to a company rather than to you personally, which needs its own authorisation.
Changing firms mid-project, where the incoming preparer needs to take over live IRS matters.

What is the difference between Form 2848 and Form 8821?

Form 8821, Tax Information Authorization, is the information-only counterpart that the IRS links directly from the Form 2848 page, alongside Form 56 and Publication 947. Form 8821 lets a designee receive and inspect your confidential tax information. Form 2848 goes further: it authorises representation, meaning the named individual can argue your position to the IRS, not merely read your file.

In practice we use both. Where a client wants a firm to monitor account activity without handing over representation rights, Form 8821 is the proportionate instrument. Where an examination is live, or where a Streamlined package is going in and someone needs to be able to respond, Form 2848 is the one that matters. Note that the two-representative notice limit spans both forms: you may not designate more than two representatives on Form 2848, or designees on a Form 8821, to receive copies of notices and communications sent to you by the IRS for the same matters.

Do I need Form 2848 just for someone to prepare and file my return?

No. Preparation and filing rest on your engagement with the firm, not on a power of attorney. Confusing the two is the single most common misconception we correct in a first call. There are three distinct instruments in a typical cross-border engagement, and they do three different jobs.

The engagement letter: the contract between you and the firm. It governs scope, fees and responsibilities.
FinCEN Report 114a, Record of Authorization to Electronically File FBARs: the instrument that lets someone e-file your FBAR for you. It is kept for your records and made available on request, rather than submitted with the FBAR itself.
Form 2848: the authorisation that lets a named, eligible individual represent you before the IRS.

A UK reader engaging a firm for a Streamlined Foreign Offshore package will typically need all three. Signing only the 2848 leaves nobody authorised to transmit the FBARs; signing only the 114a leaves nobody authorised to answer an IRS letter. The FBAR mechanics, including the 114a point, are set out at https://www.irs.gov/businesses/small-businesses-self-employed/report-of-foreign-bank-and-financial-accounts-fbar.

Can I use the IRS Tax Pro Account if I live in the UK?

No, and this is the point almost every competing guide misses. The IRS eligibility criteria for Tax Pro Account require the taxpayer to have "An address in a U.S. state or the District of Columbia". A client living at a UK address fails that test, which means the fastest, most modern authorisation route in the IRS estate simply is not available to the exact reader who most needs speed.

It is also narrower than people think. The IRS states that "Tax Pro Account is for authorization requests to individuals", that the taxpayer approves the request inside their IRS Individual Online Account, where "they can view and approve your request in their Authorizations", and that "Your approved authorization request should display in Tax Pro Account immediately after the taxpayer approves your request". Be sceptical of any page telling you the request posts to the Centralized Authorization File within a stated number of hours; the IRS makes no such statement. See https://www.irs.gov/tax-professionals/tax-pro-account.

So the routing decision for a UK address is short:

Tax Pro Account: unavailable, because you do not have an address in a US state or the District of Columbia.
Submit Forms 2848 and 8821 Online: available, and the only route on which an electronic signature is valid.
Fax: available, using 855-772-3156, or 304-707-9785 from outside the United States. Handwritten signature required.
Post: available, to the Internal Revenue Service, International CAF Team, 2970 Market Street, MS: 4-H14.123, Philadelphia, PA 19104. Handwritten signature required.

There is no queue-jumping between these. The IRS states that forms are processed "in the order we receive them, whether submitted online, by fax or mail". Two further constraints on the online tool at https://www.irs.gov/tax-professionals/submit-forms-2848-and-8821-online catch people out: "Submit one form at a time, even for married filing jointly taxpayers", and the accepted file formats are "PDF, JPG or GIF". A married couple both signing means two separate forms and two separate submissions, every time.

Why does a UK signer get 60 days to countersign instead of 45?

Because the IRS builds international post into the rule. The instructions at https://www.irs.gov/instructions/i2848 require that "the representative must sign within 45 days from the date the taxpayer signed (60 days for authorizations from taxpayers residing abroad)". The clock starts on your signature date, not on the date the form reaches the United States, and the extra fifteen days is the entire concession you get for living in the UK.

A worked timeline shows how comfortable that window is when the process is run properly. Day 0: the client signs the Form 2848 by hand at home in Surrey and dates it that day. Day 1: a scan goes to the firm so drafting of the Line 3 entries can be checked before anything is committed. Day 3: the wet-ink original goes out by international courier. Day 12: the representative signs Part II, the Declaration of Representative, and dates it. Day 15: the form is submitted. Signed on day 12 against a taxpayer signature dated day 0, it sits well inside the 60-day window.

Now the failure case, which we see more often than it should happen. A client signs and dates the form in December, then it sits in a folder through a house move and the Christmas post. The representative finally signs on day 71. That form is outside the window. The fix is not subtle and not free: the taxpayer signs a fresh form with a current date and the whole sequence restarts, which in the middle of a Streamlined project with an IRS letter already in hand is exactly the delay nobody wanted. The practical control is simple. Never sign a Form 2848 you are not about to send, and never sign one undated.

Is a digital or typed signature accepted if I sign in the UK?

Only on one route. The instructions are unambiguous: "You must handwrite your signature on Form 2848 if you file it by mail or by fax. Digital, electronic, or typed-font signatures are not valid signatures for Forms 2848 filed by mail or by fax."

By contrast, the Submit Forms 2848 and 8821 Online tool accepts electronic signatures in four described forms: a typed name, a scanned or digitized image of a handwritten signature, a handwritten signature input onto an electronic signature pad, and a signature created by third-party software. That is a genuinely useful concession for a client in the UK, and it is why the online route is usually our default.

The trap is the combination. A client receives a 2848 by email, signs it in a document-signing platform, and then, wanting to be thorough, prints it and posts it from London. That posted form carries an electronic signature on a paper route, and it is not valid. Pick the route first, then pick the signature method to match it.

One further point applies where a firm is submitting on your behalf and has never met you. Where the preparer does not know the taxpayer and the form is electronically signed in a remote transaction, the third party submitting Form 2848 "must attest that he or she has authenticated the taxpayer's identity". Expect an identity check as part of onboarding; it is not the firm being difficult, it is the condition on which your electronic signature is accepted.

Does Form 2848 need to be notarised or apostilled if I sign it in the UK?

No. Nothing in the Form 2848 at https://www.irs.gov/pub/irs-pdf/f2848.pdf, its instructions, or Publication 947 requires notarisation, witnessing or an apostille. UK clients ask this constantly, and the instinct is understandable: an Ordinary Power of Attorney or a Lasting Power of Attorney under the law of England and Wales carries formality requirements, and a UK bank or conveyancer will want to see them satisfied.

Form 2848 is a different instrument under a different legal system, and it works on IRS formality, not English formality. That cuts both ways, and the second half is the part people forget. A Lasting Power of Attorney does nothing for you at the IRS. Equally, a Form 2848 does nothing for you at HMRC, and nothing at all at a UK bank or building society. Cross-border authority does not travel; each authority is granted separately in its own system, on its own form.

Can my UK-based accountant be named on Form 2848?

It depends entirely on their credential, not on their postcode. The IRS states that "The individual you authorize must be a person eligible to practice before the IRS", and the Line 2 instruction reinforces it: "You may only name individuals who are eligible to practice before the IRS as representatives". Note the word individuals. You cannot name a firm or a company on Form 2848, only named people. Naming the practice rather than the practitioner is one of the most common reasons a form is returned.

Eligibility is licence-based. Publication 947 at https://www.irs.gov/publications/p947 requires an attorney to be "a member in good standing of the bar of the highest court of any U.S. state, possession, territory, commonwealth, or the District of Columbia", and a CPA to be "duly qualified to practice as a CPA in any U.S. state, possession, territory, commonwealth, or the District of Columbia". An enrolled agent qualifies through the IRS's own enrolment. So a chartered accountant in the UK with no US credential cannot be your representative on the strength of UK qualifications alone, while a US enrolled agent sitting in Mayfair can be.

And to dispose of a myth that circulates widely: there is no requirement in the instructions or in Publication 947 that your representative hold a US address. The test is the US credential, not geography. Part II, the Declaration of Representative, sets out the designations, which include (a) Attorney, (b) Certified Public Accountant, (c) Enrolled Agent, (d) Officer, (e) Full-Time Employee, (f) Family Member, (g) Enrolled Actuary, (h) Unenrolled Return Preparer, (k) Qualifying Student or Law Graduate, and (r) Enrolled Retirement Plan Agent.

Publication 947 also contains a provision headed Representation Outside the United States that is directly relevant to a UK-resident client: "Any individual may represent an individual or entity, who is outside the United States, before personnel of the IRS when such representation also occurs outside the United States." It is narrow, and it is not a substitute for a credentialed representative, but it exists and it is worth knowing. Note too the separate limit on unenrolled return preparers, who "may represent taxpayers only before revenue agents, customer service representatives, or similar officers and employees of the Internal Revenue Service (including the Taxpayer Advocate Service) and only during an examination of the tax returns they prepared and signed." That is a materially narrower authority than a client typically assumes they are granting.

Can I write all years on Line 3, and can it cover future years?

No, and only within a limit. Line 3 requires that "you must enter the description of the matter, the tax form number (where applicable), and the year(s) or period(s)". The instructions then remove any ambiguity about shortcuts: "Do not use a general reference such as 'All years,' 'All periods,' or 'All taxes.' The IRS will return any power of attorney with a general reference."

On future periods there is a hard ceiling: "the IRS will not record on the CAF system future tax years or periods listed that exceed 3 years from December 31 of the year that the IRS receives the power of attorney." You can therefore look forward, but only within that window, which is why a Form 2848 signed at the start of a multi-year compliance project sometimes needs refreshing partway through rather than being treated as permanent.

Two mechanical points make Line 3 easier. Years may be listed as a consecutive range, written in the style the instructions themselves use, for example "2018 thru 2020". And separate matters are listed on separate rows, so the instructions show, for instance, "Income, 1040" for one year alongside "Excise, 720" for the same year. That second point is the key to getting a Streamlined authorisation right.

How do I word Line 3 for a Streamlined Foreign Offshore catch-up?

With two rows, not one, because the year counts differ. The Streamlined Foreign Offshore Procedures at https://www.irs.gov/individuals/international-taxpayers/u-s-taxpayers-residing-outside-the-united-states require returns "for each of the most recent 3 years for which the U.S. tax return due date (or properly applied for extended due date) has passed" and FBARs "for each of the most recent 6 years for which the FBAR due date has passed". A single blanket range covering everything is therefore wrong on its face: it either overstates the income tax years or understates the FBAR years.

The two rows, using relative years so you can drop in the correct ones on the day you sign:

Row 1. Description of Matter: Income. Tax Form Number: 1040. Year(s) or Period(s): the three most recent years for which the US return due date, or properly applied-for extended due date, has passed, written as a consecutive range.
Row 2. Description of Matter: Matters relating to Report of Foreign Bank and Financial Accounts. Tax Form Number: FinCEN Form 114. Year(s) or Period(s): the six most recent years for which the FBAR due date has passed, written as a consecutive range.

Purely as an illustration of the formatting, if the three income tax years happened to be 2018 through 2020, the instructions' own style would render that as "2018 thru 2020", and the FBAR row would carry its own, longer six-year range. Never copy illustrative years from an article, including this one; the correct years are determined on the date you sign, by reference to which due dates have passed. Where the matter is an FBAR examination specifically, the IRS also accepts "FBAR Examination" as the Description of Matter.

The surrounding facts are worth restating because they drive the year counts. The Streamlined Foreign Offshore non-residency test asks whether the individual "did not have a U.S. abode and the individual was physically outside the United States for at least 330 full days" in one of the last three years. The package requires the Certification by U.S. Person Residing Outside of the U.S., Form 14653, certifying that the failures resulted from "non-willful conduct", and compliant filers "will not be subject to failure-to-file and failure-to-pay penalties, accuracy-related penalties, information return penalties, or FBAR penalties". The returns must go in "in paper form (electronic submissions will not be accepted)", while the FBARs are filed electronically through the FinCEN BSA E-Filing System. FBAR itself is triggered where foreign financial accounts exceed "$10,000 at any time during the calendar year", with a 15 April deadline and an "automatic extension to October 15".

Does Form 2848 cover my FBAR, and will it switch on transcript access?

It covers FBAR representation, but it does not behave like an income tax authorisation. The IRS confirms Form 2848 may be used for FBAR matters with the Line 3 wording set out above. However, FBAR authorisations are a Line 4 specific use not recorded on the Centralized Authorization File: the instructions list "Report of Foreign Bank and Financial Accounts (FBAR)" among the authorisations not recorded on the CAF system.

The practical consequence catches people out. An FBAR-scoped Form 2848 buys your representative standing in an FBAR examination. It does not switch on transcript access or general account visibility, because it never lands on the CAF in the first place. If you want both representation on the FBAR side and account access on the income tax side, that is two properly scoped rows on Line 3, and an understanding that they behave differently once filed.

On the CAF itself: a CAF number is "a unique nine-digit identification number and is assigned the first time you file a third party authorization with IRS", and the IRS sends a letter informing the practitioner of the assigned number. The rules are set out at https://www.irs.gov/businesses/small-businesses-self-employed/the-centralized-authorization-file-caf-authorization-rules. A CAF number identifies the representative in IRS systems; it is not a status you hold and it is not something you as the taxpayer need.

What will my representative actually see in my IRS transcripts?

Less than you expect, and this is worth setting out before anyone pays for the exercise. Wage and Income transcripts are built from US-source information reporting. A UK-resident client whose income is a UK PAYE salary, a UK employer's benefits and interest from UK bank accounts generates almost no US information returns at all, so the transcript comes back close to empty.

That is not a failure of the authorisation. It is a reflection of what the IRS actually holds. Transcripts are genuinely useful for confirming what the IRS has on file for you and what it has processed, which matters enormously when rebuilding a filing history. They are useless as a substitute for reconstructing UK income, which has to come from your P60s, employer records, bank and broker statements. Clients who expect a Form 2848 to produce a complete picture of their financial life are disappointed for the wrong reason; the form worked, the data was never there.

Does Form 2848 expire after seven years?

No. There is no seven-year rule. It appears on prominent pages and it is not supported by anything in the Form 2848 instructions or in Publication 947. A Form 2848 runs until it is revoked by you or withdrawn by the representative. If you have been told your authorisation quietly lapsed on a seven-year anniversary, that is not the position.

The real time constraint is different, and it points the other way. It is not that the form dies, it is that the IRS will not record future tax years or periods that exceed three years from December 31 of the year the power of attorney is received. So the authorisation persists, while the forward reach of the periods it covers is capped. Those are two separate ideas, and conflating them produces exactly the seven-year folklore.

Two related capacity rules are worth holding alongside that. You may not designate more than two representatives to receive copies of notices and communications for the same matters. And if you need to name more than four representatives, you write "See attached for additional representatives" and attach an additional Form 2848.

Does signing a new Form 2848 cancel the one I gave my previous accountant?

Generally yes, unless you take a deliberate step to prevent it. A newly recorded power of attorney "will generally revoke any earlier power of attorney previously recorded on the system for the same matter". The escape hatch is Line 6: "If you do not want to revoke any existing power(s) of attorney, check the box on line 6 and attach a copy of the power(s) of attorney."

This is the mechanic that quietly causes trouble when clients change firms. Two scenarios recur. In the first, a client wants a clean handover and forgets that the departing firm still holds a live authorisation on the same matter, then is surprised when the new form displaces it, which is in fact the outcome they wanted. In the second, and more damaging, a client engages a new firm mid-Streamlined while the original firm is still handling an open IRS thread, and a tick-box omission on Line 6 cuts the original firm out of a matter they were still actively running. Decide deliberately which authorisations should survive, then tick or leave Line 6 accordingly, and attach the copies when you tick.

What if the matter belongs to my UK company rather than to me?

Then it needs its own Form 2848. Your personal authorisation covers you. Where a US filing matter belongs to an entity rather than to an individual, the authorisation is a separate Form 2848 in the entity's name, carrying the entity's EIN and signed by an officer with authority to bind it. That is one reason Part II includes designations for (d) Officer and (e) Full-Time Employee.

It is also a reason the Tax Pro Account route would not have solved the problem even for a US-resident client, since the IRS states that "Tax Pro Account is for authorization requests to individuals". Business owners and investors with corporate interests behind their personal filings, including those with Form 5471 reporting obligations, should expect to sign more than one authorisation, and should expect each to be scoped separately on Line 3.

Will I still receive IRS letters at my UK address?

Yes. Designating representatives does not redirect your correspondence; it adds recipients, and only up to two of them for the same matters. You remain in the loop, which is right in principle and awkward in practice when the loop runs through international post.

The compression is real. A letter giving you 30 days to respond spends part of that window in transit to the UK, and any document you post back spends more of it going the other way. By the time a UK client opens the envelope, a meaningful slice of the response period is gone. Two habits protect you: make sure your representative is designated to receive copies, so the clock effectively starts for them at the same time it starts for you, and scan and forward anything IRS-headed on the day it lands rather than the week it lands.

How does Form 2848 compare with HMRC's form 64-8?

They are parallel instruments in two unconnected systems, and a dual filer needs both. Neither has any effect in the other jurisdiction. HMRC's guidance at https://www.gov.uk/guidance/authorising-an-agent-to-deal-with-your-tax-affairs makes the responsibility position explicit: "You'll still be legally responsible for your own tax. If your agent submits your tax return, you must check the information and let them know it's correct before they submit it to us." The same principle holds on the US side. Authorising a representative moves the work, not the responsibility.

Scope: Form 2848 is scoped tightly by matter, form number and period on Line 3. HMRC's paper form 64-8 covers "individual, partnership and trust tax affairs" plus tax credits, Corporation Tax, PAYE, the Construction Industry Scheme and VAT.
Who can be named: Form 2848 names individuals eligible to practise before the IRS, never a firm. HMRC's route authorises an agent for the relevant taxes.
Where it goes: Form 2848 from a UK address goes to the International CAF Team in Philadelphia, by post or fax, or through the online submission tool. Form 64-8 goes to HMRC's Central Agent Authorisation Team.
Signature: Form 2848 requires a handwritten signature on paper routes and permits electronic signatures only through the IRS online tool.
Responsibility: unchanged in both systems. You remain legally responsible for your own tax.

What does Form 2848 not let my representative do?

It does not put them anywhere near your money. The instructions state that "Representatives are not authorized to endorse or otherwise negotiate any check (including directing or accepting payment by any means, electronic or otherwise, into an account owned or controlled by the representative or any firm or other entity with whom the representative is associated) issued by the government in respect of a federal tax liability." Your refund is yours, and a legitimate firm will never propose routing it through their account. Treat any suggestion otherwise as a reason to end the conversation.

More broadly, authority under Form 2848 is what the form says it is. Anything beyond representation on the matters and periods you have written on Line 3 has to be specifically authorised in writing on the form itself, not assumed from the fact that a power of attorney exists. If you want your preparer to be able to do something particular on your behalf, such as signing something in your place, raise it explicitly before signing rather than discovering the gap during an examination.

How do I revoke or withdraw a Form 2848?

Both directions are simple annotations on a copy of the existing form. To revoke, you as the taxpayer write "REVOKE" across the top of the first page, sign and date below the annotation with a current signature, and mail or fax it to the IRS. To withdraw, the representative writes "WITHDRAW" across the top of the first page and signs and dates below the annotation.

From a UK address, the destination for either is the same as for the original: the International CAF Team in Philadelphia, or the fax number for senders outside the United States. Keep a dated copy of what you sent and how you sent it. Where an authorisation is being wound down at the same time as a new firm is being appointed, do the two in the right order and use Line 6 on the incoming form deliberately, so you do not end up with either a gap or an unintended overlap in who can speak for you.

Form 2848 rewards precision and punishes casual completion. For a UK-resident filer the whole exercise reduces to five decisions: pick a representative with a genuine US credential, scope Line 3 by matter, form and period with no general references, match the signature method to the submission route, sign and send in one motion so the 60-day window is never in doubt, and use Line 6 consciously if an earlier authorisation should survive. Get those right and the form disappears into the background, which is exactly where an authorisation should sit while the substantive compliance work gets done.