W-8BEN for UK Contractors Invoicing US Clients

If you live in the UK and do the work in the UK, your fees from a US client are foreign-source income: there is generally no US tax and no US withholding, and no 1099-NEC should be issued to you. What the client does need is a signed Form W-8BEN (if you invoice as an individual or sole trader) or Form W-8BEN-E (if you invoice through a UK limited company) to document that you are not a US person. A Form W-9 is the wrong form — the IRS instructions are explicit that "if you are a nonresident alien or a foreign entity, give the requester the appropriate completed Form W-8 or Form 8233."

Key takeaways

• US tax on personal services follows where the work is physically performed, not where the client is. Work done at your desk in Manchester is foreign-source: no US tax, no 30% withholding, no 1099-NEC — but you still hand over a W-8 so the client can prove it.
• With no valid form on file, a cautious payer withholds 30% under the nonresident rules or 24% as backup withholding. Both are avoidable and slow to reclaim.
• Travel to the US to deliver the work and those days become US-source income; protection then comes from Article 7 of the treaty, not the W-8BEN.
• Services to a US business customer are outside the scope of UK VAT, so they do not count towards the £90,000 registration threshold.
• US citizens and green card holders in the UK are the mirror image: W-9, possibly a 1099-NEC, worldwide income to the IRS.

Why your US client is asking for a tax form

A US payer that gets a payee's status wrong can be liable for the tax it failed to withhold, plus penalties. So accounts-payable teams collect a certificate before releasing the first payment, and the IRS instructions agree: "Give Form W-8BEN to the person requesting it before the payment is made to you, credited to your account, or allocated." Most US onboarding systems are built for US suppliers, so their default form is a W-9. Nobody is trying to mislead you — the form simply does not apply, and returning it completed creates a record that you are a US person, which is how UK contractors end up with a 1099-NEC.

The sourcing rule that decides everything

One principle decides it, and the IRS states it without qualification: "The place, where the personal services are performed, generally determines the source of the personal service income, regardless of where the contract was made, or the place of payment, or the residence of the payer."

A London designer working from home for a San Francisco startup therefore earns foreign-source income. A nonresident alien is taxed by the US only on US-source income and income effectively connected with a US trade or business. Foreign-source income is neither: nothing to withhold, nothing to report. The corollary matters as much: fly to New York for a fortnight on site and the fee for those days is US-source, mixed engagements being split on a workday basis.

Which form you actually give your client

| Who you are | Form for the US client | US withholding on UK work | What you file |

| --- | --- | --- | --- |

| UK sole trader or freelancer, work done in the UK | W-8BEN | None — foreign-source | UK Self Assessment only |

| UK limited company, work done in the UK | W-8BEN-E | None — foreign-source | UK corporation tax return only |

| UK individual doing part of the work physically in the US | Form 8233 for the US-source element | Withholding unless treaty exemption certified on Form 8233 | Form 1040-NR, plus UK Self Assessment |

| UK company with a fixed place of business or dependent agent in the US | W-8BEN-E, or W-8ECI where income is effectively connected | Net-basis tax on profits attributable to the US permanent establishment | Form 1120-F, plus the UK return with double tax relief |

| US citizen or green card holder in the UK | W-9 | None — but backup withholding if the TIN is missing or wrong | Form 1040 and UK Self Assessment |

The W-8BEN is a certificate of status, not a request for permission, and it goes to the client, never to the IRS.

What happens when no form is on file: a worked example

A UK limited company invoices a US software business $60,000 over a calendar year for development work done entirely in Bristol. Procurement flags a missing certificate. Two things can go wrong:

• Chapter 3 withholding at 30%. The IRS is unambiguous that "most types of U.S. source income received by a foreign person are subject to U.S. tax of 30%." Without documentation a payer withholds rather than risk its own liability: $18,000 held back.
• Backup withholding at 24%. If the payer instead presumes you are a US person with no correct TIN on file, "persons making certain payments to you must under certain conditions withhold and pay to the IRS 24% of such payments": $14,400.

In both cases the correct answer was nil: the income was never US-source. The money is not lost, but it is gone for a year or more, and payroll and corporation tax still have to come out of the remaining $42,000.

Getting over-withheld tax back

The IRS confirms a nonresident "must file an income tax return if you want to claim a refund of excess withholding." In practice:

1. Obtain the Form 1042-S from the withholding agent showing the gross income and tax withheld. You cannot claim without it.

2. Get a US taxpayer identification number. If you are not eligible for a Social Security number, apply for an ITIN on Form W-7 with proof of foreign status.

3. File Form 1040-NR (individuals) or Form 1120-F (companies) for that year and claim the refund.

4. Consider whether Form 8833 is needed to disclose a treaty-based position. Failing to disclose when required carries a penalty of "$1,000 ($10,000 in the case of a C corporation)" under section 6712.

5. Put the correct W-8 on file before the next invoice.

Refunds take far longer than a UK repayment.

Completing the form: the mechanics that trip people up

For Form W-8BEN (individuals):

1. Use your legal name and country of citizenship at the top, not your trading name.

2. Give your permanent residence address in the UK. A c/o address, PO box or US address invalidates the form.

3. Line 5 is for a US TIN; line 6a for your foreign tax identifying number. The instructions state: "To claim certain treaty benefits, you must complete line 5 by submitting an SSN or ITIN, or line 6 by providing a foreign tax identification number (foreign TIN)." For a UK individual your UTR is normally the foreign TIN — which is why most UK freelancers never need an ITIN.

4. Part II, line 9: enter United Kingdom as the treaty country. Line 10 is only for treaty positions the standard certification does not cover.

5. Sign and date, stating your capacity if signing for someone else.

Form W-8BEN-E (UK limited companies) adds two entity-only boxes. Chapter 3 status: a company limited by shares ticks Corporation. Chapter 4 (FATCA) status: a normal trading company is almost always an Active NFFE — less than 50% of gross income for the preceding calendar year is passive, and less than 50% of assets produce passive income. That certification sits in Part XXV. A company earning consultancy, development or design fees qualifies; one sitting mainly on investments does not. To certify that your profits are not attributable to a US permanent establishment, use line 15.

Validity. Both forms expire. A W-8BEN "will remain in effect for purposes of establishing foreign status for a period starting on the date the form is signed and ending on the last day of the third succeeding calendar year, unless a change in circumstances makes any information on the form incorrect." Sign on 24 September 2026 and it runs to 31 December 2029. Change country or entity type and you must tell the withholding agent within 30 days and send a fresh form.

When you travel to the US to work

Under Article 3(1)(d) of the US–UK treaty, "business" expressly "includes the performance of professional services and of other activities of an independent character". A self-employed consultant is therefore an enterprise, and independent services fall under Article 7 (Business Profits) — there is no separate independent-personal-services article in this treaty. Article 7(1) provides that "the business profits of an enterprise of a Contracting State shall be taxable only in that State unless the enterprise carries on business in the other Contracting State through a permanent establishment situated therein."

So the question is not how many days you spend in the US, but whether you have a permanent establishment there. Article 5(1) defines that as "a fixed place of business through which the business of an enterprise is wholly or partly carried on". Article 5(3) gives a building or installation project twelve months before it becomes a PE; Article 5(4) excludes preparatory or auxiliary activity; Article 5(5) can create a PE with no premises at all, where someone habitually exercises authority to conclude contracts binding on you. Working from a client's conference room for a fortnight is not a fixed place of business; renting an Austin desk for eight months and running your US work from it very probably is. Three qualifications:

• The treaty gives relief; it does not make the income vanish. Claiming it usually means a Form 1040-NR and a Form 8833 disclosure.
• Employees fall under Article 14, where the familiar 183-day test lives: pay is taxable only in the home state if the employee is present in the other state for "not exceeding in the aggregate 183 days in any twelve-month period", and the pay is borne neither by an employer resident there nor by a permanent establishment there.
• A narrow domestic exception covers very short trips: a nonresident is not engaged in a US trade or business where the stay is 90 days or less, compensation does not exceed $3,000, and the work is for a foreign employer. That ceiling makes it useless for most professional fees. Entertainers and sportspeople have their own rule — Article 16 lets the US tax performance income once gross receipts exceed $20,000.

1099-NEC or 1042-S: which should land in your inbox

Neither, if the work was done in the UK — but it helps to know what each is for.

Form 1099-NEC reports nonemployee compensation paid to US persons. For payments made in 2026 the threshold is $2,000, raised from $600 by P.L. 119-21 and indexed for inflation from 2027. A UK-resident contractor receiving a 1099-NEC for UK-performed work has been misclassified — almost always because a W-9 was collected instead of a W-8BEN.

Form 1042-S reports US-source income paid to foreign persons, and is filed "even if you did not withhold tax under chapter 3 because the income was exempt from tax under a U.S. tax treaty." If you did work in the US and claimed treaty relief, a 1042-S showing nil withheld is the correct outcome, not a red flag.

If a 1099-NEC arrives in error, ask for a corrected form and replace the record with the right W-8. Do not ignore it: the IRS has been told you received US-source compensation.

Platforms, marketplaces and payment processors

Marketplaces and platforms ask for a certificate at onboarding, usually through a wizard. The logic is unchanged: a UK individual completes a W-8BEN, a UK company a W-8BEN-E, three-year validity included. A payment processor moving your client's money is settling a transaction, not paying you US-source income. A marketplace that licenses your work or pays royalties may be — royalties are sourced differently and sit under a separate treaty article, so the answer may not be nil.

US platforms also file Form 1099-K for card and third-party network transactions — for third-party settlement organisations, over $20,000 and more than 200 transactions in a calendar year. That is a gross settlement report, not a statement that the income is US-source.

The UK side: trading income, sterling and VAT

For a UK sole trader, fees from US clients are ordinary trading income on the self-employment pages; for a limited company, turnover in the accounts and the corporation tax computation.

Currency. Accounts and computations are in sterling. HMRC is pragmatic: traders "may use London closing rates... when translating foreign currency amounts into sterling in their accounts. Equally they may use other exchange rates, such as an exchange rate quoted by their bank, or the monthly average rates published by HMRC." Consistency and a defensible source are what matter. Exchange differences between invoice and receipt are trading items.

VAT. The B2B general rule in HMRC's Notice 741A is that "the supply is made where the customer belongs." Supply consultancy, design, development or marketing to a business customer in the United States and the place of supply is the US, so it is outside the scope of UK VAT. You do not charge UK VAT, and there is no UK reverse charge because the customer is not in the UK; any US sales or use tax is a matter for the relevant state. Keep evidence the customer is in business — company registration, a signed contract, correspondence on letterhead. Selling to a US private individual is different: the B2C rule puts the place of supply where the supplier belongs, except for a defined list including "services of consultants, engineers, consultancy bureaux, lawyers, accountants, and other similar services", data processing and advertising.

Does US income count towards the £90,000 threshold? No. GOV.UK defines taxable turnover as "the total value of everything you sell that is not VAT exempt" and excludes "VAT exempt or 'out of scope' goods and services". A consultant billing £120,000 a year entirely to US businesses need not register on the strength of that turnover — though voluntary registration is worth modelling, since input VAT on UK costs may be recoverable. Our note on invoicing international clients covers the mechanics.

If you are a US citizen or green card holder in the UK

Everything above inverts. You are a US person, so:

• You complete Form W-9, not a W-8BEN, give the client your SSN or ITIN, and may receive a Form 1099-NEC if payments for 2026 reach $2,000 — correctly, this time.
• You report worldwide income. The IRS puts it flatly: "You are subject to tax on worldwide income from all sources and must report all taxable income and pay taxes according to the Internal Revenue Code."
• You get an automatic extension to 15 June living outside the US, but "you will have to pay interest on any tax not paid by the regular due date of your return."
• Self-employment tax is a separate question, resolved by the social security agreement rather than the income tax treaty — see self-employed in the UK and US self-employment tax. Double taxation is managed through credits or the foreign earned income exclusion; our guide to how the US–UK treaty prevents double taxation sets out the framework.

Common mistakes

• Returning a completed W-9 because that is the form you were sent. You would be certifying US person status you do not have. Send the W-8 instead.
• Letting the certificate lapse. A W-8 signed in 2023 has now expired, and the longest-standing clients are the likeliest to start withholding.
• Applying for an ITIN when your UTR would do, or putting a US address in the permanent residence field, which undermines the status you are certifying.
• Assuming the treaty covers US travel automatically. It usually does, but only with no US permanent establishment, and claiming it means a 1040-NR and a Form 8833.
• Charging UK VAT to a US business customer, or counting outside-the-scope income towards the VAT threshold — the first collects tax that is not due, the second registers you years early.
• Ticking Passive NFFE by default on the W-8BEN-E. A normal UK trading company is an Active NFFE, and the wrong box triggers requests for owner information you need not give.

Sources

• IRS: W-8BEN instructions, W-8BEN-E instructions, Form W-9, Form W-8ECI
• IRS: source of personal service income, NRA withholding, Publication 515, backup withholding
• IRS: 1099-MISC and 1099-NEC instructions, Form 1042-S instructions, 1099-K threshold FAQs
• IRS: nonresident aliens, Publication 519, ITIN applications, Form 8833, Form 1120-F, citizens abroad
• HMRC: Notice 741A, VAT registration, BIM39515

When to get help

Most UK freelancers with US clients need one thing: the right W-8 on file, signed, in date and correctly classified — a twenty-minute job once every three years. Get professional input when the facts get harder: real working time in the US, a client that has already withheld, royalties rather than service fees, or a US entity in prospect. At Next Tax Source an ACCA-qualified accountant handles the UK position and a licensed CPA or Enrolled Agent reviews and signs off anything touching a US return. See our US–UK cross-border business tax and US–UK expat tax work, or book a consultation. General information, not advice on your circumstances.