IR35 for Overseas Clients: The 2026/27 UK Contractor Guide

Working for an overseas client is one of the more overlooked IR35 configurations. The off-payroll working reforms of 2017 and 2021 assumed a UK end-client at the top of the chain. When there isn't one, a different set of rules applies — and the practical answer is often meaningfully better for the contractor.

Here's how it actually works in 2026/27, what the exemption looks like, and the practical issues that trip contractors up when their client sits abroad.

The two IR35 regimes and why the client's location matters

UK IR35 legislation splits into two chapters:

• Chapter 8 ITEPA 2003 — the original IR35 rules from 2000. The PSC contractor determines their own status and pays any deemed employment tax if inside.
• Chapter 10 ITEPA 2003 — the "off-payroll working" rules. For medium and large clients (mostly public sector from 2017, private sector from April 2021), the end-client determines status via an SDS and the fee payer is liable for any PAYE/NIC.

Chapter 10 only applies when the client is UK-based and medium or large. If the client sits wholly overseas with no UK presence, Chapter 10 falls away and you're back in Chapter 8 territory — the "old rules" that predate the off-payroll reforms.

The wholly-overseas exemption — who qualifies

The off-payroll rules explicitly carve out overseas clients that have no UK connection. The technical test in the legislation:

• The client is not resident in the UK, AND
• The client has no UK permanent establishment (no branch, agency, fixed place of business in the UK), AND
• The services are provided to the overseas client, not to a UK subsidiary of that client.

All three have to be true. If the overseas client has a UK subsidiary and you're actually contracted to serve that UK entity, off-payroll rules apply as normal. The clue is who is legally your client under the contract — not who you happen to be talking to on the calls.

What "back on Chapter 8" actually means

Landing back in Chapter 8 territory is often mistakenly treated as "automatic outside IR35." It isn't. You still have to make a genuine status assessment against the same factors HMRC would apply to any engagement — substitution, control, mutuality of obligation, financial risk, integration. All the analysis in the challenging an inside SDS guide still applies factor by factor.

What changes is:

• Who decides: you, the PSC contractor. There's no SDS from the client.
• Who's liable if the assessment is wrong: you, the PSC. HMRC's discovery powers give them 4–20 years to reassess and demand back PAYE/NIC plus interest and possible penalties.
• Documentary evidence you should keep: a written status assessment for each overseas engagement, ideally backed by a professional IR35 contract review if the value or duration warrants it.

The practical outcome for well-structured overseas engagements: they usually score genuinely outside IR35 because they naturally involve loose supervision (client is in a different time zone), autonomous delivery (client isn't watching your hours), and defined project scope. But you should document that assessment rather than assume it.

Structuring the contract for outside-IR35 strength

The IR35 factors that carry weight look the same for overseas engagements, but the practical arrangements often naturally strengthen them:

Substitution

Include a genuine, unfettered right to send a substitute. Overseas clients often care about the deliverable more than who delivers it — making this clause less contested than it can be with UK clients. Get it into the master services agreement, not just a schedule.

Control

Define the engagement in deliverables and outcomes rather than time and attendance. Time zones help here — if you're serving a US or Australian client from the UK, the practical impossibility of them "watching your desk" strengthens the case.

Mutuality of obligation

Structure as a series of statement-of-work (SOW) engagements rather than an ongoing consulting relationship. Each SOW is a fixed deliverable at a fixed fee — no obligation to offer or accept further work.

Financial risk

Standard commercial terms: payment on delivery of milestones, rectification of defects at your cost, professional indemnity insurance in place. If you're carrying the risk, you look less like an employee.

VAT and place of supply

VAT gets more interesting with overseas clients. The general rule for services supplied to a business customer overseas is that the place of supply is where the customer belongs, not where you sit. Which means:

• Your invoice to a US or EU business customer carries no UK VAT — the supply is outside the scope of UK VAT.
• You should include a note on the invoice such as "Reverse charge: customer to account for VAT" if the customer is EU-based, or simply "Outside scope of UK VAT" for non-EU business customers.
• You can still reclaim UK VAT on business inputs (equipment, software subscriptions, professional fees) as long as those inputs relate to the services you're supplying. The zero-rated status doesn't kill your input VAT recovery.
• If you're on the Flat Rate Scheme, overseas revenue is included in your flat-rate calculation, which typically makes the FRS less advantageous for heavily overseas-focused contractors. Standard VAT accounting is often better.

The salary-vs-dividends split guide covers the FRS decision in more detail — the calculation is similar for overseas revenue but with a different weighting.

Currency, payment, and FX exposure

The practical minefield. Common contractor issues:

• Invoicing currency. Invoice in whichever currency the client naturally pays in (typically USD or EUR) if you're comfortable with the FX exposure. Invoicing in GBP puts the FX risk on the client but often results in fewer accepting the terms.
• Multi-currency business banking. Standard UK banks handle GBP well, foreign currency less so. Wise Business and Revolut Business are often the pragmatic choice for contractors with recurring overseas revenue — you can hold, spend, and convert at close-to-interbank rates.
• Booking timing. UK accounting standards require you to book overseas revenue at the exchange rate on the invoice date. If GBP moves before you receive payment, the difference is an FX gain or loss in your P&L. Neither taxed unusually — just noted.
• Payment terms. Overseas clients often stretch payment terms (60–90 days is common in the US, longer in some parts of Asia). Model your cash flow around this reality, not the invoiced terms.

Contract jurisdiction — the clause that matters when things go wrong

The single most important commercial clause in an overseas contract is the jurisdiction and governing-law clause. Push for English law and exclusive jurisdiction of the English courts wherever possible.

Why it matters: if the client stops paying an invoice, suing in the UK is manageable. Suing in California or Singapore is not, unless the amount is very large. A well-drafted jurisdiction clause is worth more than any other single provision when a payment dispute arises.

Larger overseas clients often push back on this and insist on their own local jurisdiction. The middle ground — and worth negotiating for — is arbitration in a neutral commercial venue such as London under LCIA rules, or Paris under ICC rules. Both are enforceable in most major economies through the New York Convention.

What still catches contractors out

• Assuming "overseas client = outside IR35". The overseas exemption removes the SDS obligation but not the underlying status assessment. Document it properly.
• Confusing personal residency with client location. The rules concern the client's location, not yours. You remain UK-tax-resident based on your own residence and the SRT, regardless of where your clients sit.
• Failing to check for UK subsidiaries. A "US client" with a UK Ltd company subsidiary is materially different from a wholly-overseas client. Check Companies House if you're not sure.
• Getting VAT wrong on the invoice. Charging 20% UK VAT to an overseas B2B client is a common error — you'll either have to refund the VAT or apply an unfortunate reverse-charge fudge in your VAT return. Get the invoice right first time.
• Ignoring double taxation risk. Some countries withhold tax at source on services fees. The UK has treaties with most major economies to avoid double taxation, but you'll need the paperwork (e.g. a UK residence certificate from HMRC) to reclaim withheld tax. Cost of admin can eat the margin if not handled up front.
• Not adjusting the salary/dividend split. An overseas engagement doesn't change your PSC extraction strategy — the salary vs dividends split logic is unchanged.

The honest bottom line

For UK PSC contractors, an engagement with a wholly-overseas client is generally one of the cleaner IR35 situations available. The off-payroll rules fall away, the status assessment reverts to you, and the practical working arrangements (time zones, deliverable-focused engagements, natural autonomy) often score genuinely outside IR35 on their own merits.

The real work isn't the IR35 side — it's the commercial infrastructure. Currency handling, payment terms, jurisdiction clauses, VAT invoicing, and cash flow modelling deserve more attention than they usually get. Get those right up front and the engagement often becomes one of the more profitable configurations a UK contractor can run.