Payroll Tax US Company UK Employees PAYE: Founder Guide |

Why the US Founders Ended Up Here

Most US founders meet UK payroll the same way: an investor pushes them to open a European hub, a recruiter sends them a strong London engineer, and the candidate asks an innocent question on the second call — "Will you be running PAYE for me, or putting me through Deel?" The founder googles the answer at midnight and finds either thin marketing pages or 5,000-word PDFs from the Big Four.

This guide is the version we plan to send to those founders. It covers what the payroll tax US companies pay for UK employees' PAYE framework actually requires, how the three delivery routes compare in pounds-and-pence terms, and how to avoid the four or five expensive mistakes that most often show up when a US company hires its first UK worker without specialist help. For a broader US-UK context, see our US-UK cross-border tax advisory service.

What Is Payroll Tax for US Companies with UK Employees Under PAYE

PAYE — short for Pay As You Earn — is the system HMRC uses to collect Income Tax and National Insurance from UK workers as they are paid each month. It is governed by the Income Tax (Earnings and Pensions) Act 2003. Any employer paying a UK-resident worker has to operate PAYE unless one of the narrow alternative schemes applies.

For a US company, the practical effect is a monthly cycle. You deduct UK Income Tax and Employee NIC from the gross pay, you pay an Employer NIC on top of that gross figure, and you report everything to HMRC on or before the day the worker is paid. Around that core sit auto-enrolment pension duties, statutory sick pay, statutory maternity and paternity pay, and a minimum holiday entitlement of 28 days, including bank holidays. The official HMRC employer guide is available at https://www.gov.uk/paye-for-employers.

The rules apply whether you employ one engineer working from a flat in Hackney or fifty staff in a serviced office on Old Street. The decision that changes is the delivery model — direct PAYE, DPNI, or Employer of Record — and that single choice tends to drive the next three years of UK admin cost.

Why This Topic Hit Founders Harder in 2025-26

Two changes in the October 2024 Budget reshaped the maths. From 6 April 2025, the Employer NIC rate rose from 13.8 percent to 15 percent, and the Secondary Threshold — the earnings point at which Employer NIC starts — fell from £9,100 to £5,000. Both changes apply across the 2025-26 UK tax year and every year after unless Parliament rolls them back.

On a £70,000 UK salary, the Employer NIC bill is now £9,750 — about £1,950 more per head per year than under the old regime. For a team of five UK engineers, that is just under £10,000 of extra cost the founder did not see coming. The HMRC NIC rates page sits at https://www.gov.uk/national-insurance-rates-letters.

Two more factors raise the stakes. First, the Apprenticeship Levy still kicks in once your UK payroll passes £3 million a year, adding another 0.5 percent on the excess. Second, HMRC's enforcement of Real Time Information has tightened — penalties for late Full Payment Submissions now stack from the first late filing, not the second. For deeper coverage, see our US-UK cross-border employment tax service.

The Three Routes a US Company Can Take

Route A: Direct PAYE Through a UK Subsidiary

This is the structurally cleanest answer. You incorporate a UK Limited company through Companies House, register it for Corporation Tax, open a UK business bank account, and register the new entity as an employer with HMRC. UK staff are then employed by the UK subsidiary, not by the US parent.

Set up runs around £4,000-£12,000 in legal and accountancy fees, and the lead time from incorporation to first payday is six to ten weeks. Ongoing UK payroll costs settle at roughly £25- £60 per employee per month once a UK accountant runs the payroll cycle. The big advantage is cost efficiency at scale — once you cross five UK staff, this route is meaningfully cheaper than EOR. The disadvantage is that you also incur UK Corporation Tax obligations on the subsidiary's profits, transfer-pricing documentation between the US parent and the UK subsidiary, and full UK statutory employer duties.

Route B: DPNI Scheme for a Single Remote Hire

A DPNI scheme — Direct Payment, No Income Tax deducted at source by the employer — is HMRC's narrow workaround for situations where the foreign employer has no UK presence at all and only one UK-based worker. The employee registers their own PAYE scheme with HMRC, calculates and pays their own Income Tax each month, and the US company sends across Employer NIC separately.

DPNI is workable for a single remote contractor-style hire who is comfortable handling admin. It breaks down into two employees and becomes unmanageable at three. Auto-enrolment is also awkward because there is no formal UK employer to administer a workplace pension scheme. HMRC's internal PAYE manual sits at https://www.gov.uk/hmrc-internal-manuals/paye-manual.

Route C: Employer of Record

An Employer of Record is a UK-based third-party that legally employs your worker on your behalf while you direct their day-to-day work. Deel, Remote, Velocity Global, Globalization Partners, Oyster, Multiplier, Papaya Global, and Rippling EOR all run this model. The EOR handles PAYE, NIC, auto-enrolment, contracts, statutory benefits, and HR compliance.

Onboarding through EOR runs five to ten working days. The fee sits at around £550- £1,200 per employee per month, on top of salary and on-costs. EOR also carries the lowest permanent-establishment risk for the US parent because the EOR's UK entity stands between the worker and the parent. The trade-off is pure cost: over three years, EOR is roughly £20,000-£40,000 more per employee than a UK subsidiary. The crossover point sits around four or five UK hires, and that single number drives most of the decision.

How to Set Up UK Payroll Step by Step

The path below assumes Route A — a UK subsidiary. Most US companies hiring three or more UK staff land here within a year of their first hire.

Step 1 — Incorporate a UK Limited company. File at Companies House, set up a registered office address, and appoint at least one director. Allow seven to fourteen working days. The Companies House guidance sits at https://www.gov.uk/limited-company-formation.

Step 2 — Register for UK Corporation Tax. HMRC issues a Unique Taxpayer Reference once the company is incorporated. Register within three months of trading. If UK turnover exceeds £90,000 in a rolling 12-month period, you also need to register for VAT.

Step 3 — Register the company as an employer for PAYE. Apply through HMRC Online Services. The PAYE reference number and the Accounts Office Reference arrive within 2 to 4 weeks. You cannot run a UK payday before both arrive.

Step 4 — Set up a workplace pension scheme. NEST is the simplest free option, and most US founders start there. Smart Pension and Penfold are common modern alternatives. Enroll every eligible worker, contribute at least 3 percent on qualifying earnings, and re-enroll non-members every three years.

Step 5 — Pick UK payroll software and an accountant. Xero Payroll, BrightPay, Sage Payroll, and IRIS Payroll all handle RTI submissions cleanly. Pair the software with a UK accountant who runs the monthly cycle and handles statutory pay calculations.

Step 6 — Run the first Full Payment Submission. The FPS must be submitted to HMRC on or before the payday itself, not at the end of the month or in the next pay cycle. Late filings trigger automatic penalties starting at £100 per month.

Step 7 — Issue compliant contracts and handle day-one rights. UK employment law requires a written statement of particulars on day one, 28 days' minimum paid holiday, including bank holidays, statutory sick pay from day four of absence, and full GDPR compliance for employee personal data.

Worked Example: A US Robotics Startup Hires Four UK Engineers

A Boston-based robotics startup with $22m Series A funding hired its first four UK engineers in early 2026 — two in Cambridge, one in Bristol, and one remote in Glasgow—average gross salary: £82,000; total UK gross payroll: £328,000 per year.

The founder initially leaned toward Deel for speed. Our US-UK Tax team modeled both routes side by side over 3 years. EOR for four engineers would have cost around £36,000 a year in fees on top of salary, NIC, and pensions — roughly £108,000 over the three-year window. Setting up a UK subsidiary costs £8,500 in legal and accountancy fees plus £14,400 a year in ongoing payroll and Corporation Tax compliance, totaling around £51,700 over the same three years.

The maths pointed to the UK subsidiary, but the founder needed an engineer onboarded within two weeks for a customer pilot. We bridged the gap: the first hire went through Deel for the first 90 days, and the UK subsidiary was set up in parallel. All four engineers migrated to the UK Limited company in month three, and the EOR was wound down cleanly.

The full UK employment cost breakdown was as follows: gross salaries, £328,000. Employer NIC at 15 percent on earnings above £5,000 came to £48,450. Auto-enrolment pension at 3 percent of qualifying earnings added £8,820. Private medical, life cover, and a small annual training budget added £9,600. Total UK employment costs £394,870 — a 20.4 percent overhead on top of gross.

Permanent establishment was the other concern worth working through. Because the engineers worked for the UK subsidiary rather than the US parent directly, the PE risk on the parent remained contained. The two entities trade on an arm's-length cost-plus-eight-percent services basis with proper transfer-pricing documentation, and the US-UK treaty position is set out in Article 5 of the convention. The IRS treaty index sits at https://www.irs.gov/businesses/international-businesses/united-states-income-tax-treaties-a-to-z.

The case is typical of the pattern we see across 30+ US founder engagements per year: EOR for speed, a UK subsidiary for cost, and a planned migration once the team passes 3 or 4 heads.

Common Mistakes US Companies Make

Budgeting on the gross salary number. A £75,000 UK offer letter costs the employer closer to £90,000 once Employer NIC and auto-enrolment pension are layered on top. Founders almost always miss the 18-22 percent uplift on the first hire. Build the on-cost into the offer letter spreadsheet before signing.

Trying to stretch DPNI past one employee. DPNI was designed for a single worker with no UK employer presence. The second hire breaks the model — pension auto-enrolment becomes administratively awkward, NIC routing gets confused, and HMRC starts asking why a foreign employer has multiple UK workers under self-administered schemes.

Ignoring permanent-establishment risk. A UK-resident salesperson with authority to negotiate and close contracts can create a UK PE for the US parent under Article 5 of the US-UK treaty. The result is UK Corporation Tax on profits attributable to that PE plus retrospective filings. Talk to a specialist before hiring a UK commercial lead, not after. The HMRC International Manual sits at https://www.gov.uk/hmrc-internal-manuals/international-manual.

Treating UK staff as contractors. HMRC looks at substance, not labels. A worker who keeps set hours, takes daily direction from your team, uses your tools, and cannot be substituted by another person is an employee, regardless of the contract title. Misclassification costs typically run to 12 to 24 months of payroll catch-up, plus NIC, interest, and penalties.

Missing the Pensions Regulator Declaration of Compliance. Every new UK employer must file a Declaration of Compliance with the Pensions Regulator within five months of their staging date. Miss it, and the Regulator issues fines starting at £400, escalating daily.

Forgetting holiday and statutory sick pay in the cash model. UK statutory holiday is 5.6 weeks per year — 28 days including bank holidays. Statutory sick pay kicks in from day four of qualifying absence. Both need to be in the financial model before the offer goes out, not after the first sickness claim lands.

How US-UK Tax Helps US Founders

Our team holds CTA credentials with the Chartered Institute of Taxation and Enrolled Agent status with the IRS, so the same people advise on both the UK and US sides of every engagement. That single point matters a lot once transfer pricing, treaty positions, and permanent-establishment risk enter the conversation, because handing those questions back and forth between separate UK and US advisers is where US founders typically lose 4 to 6 weeks. A typical engagement runs three phases. Phase one is the strategic decision — direct PAYE, DPNI, or EOR — built on an actual three-year cost model for your specific hiring plan rather than a generic template. Phase two is the setup if you choose Route A: incorporation, PAYE registration, pension scheme, UK contracts, and the first month of payroll alongside your software choice. Phase three is ongoing compliance — monthly RTI, year-end P60S and P11Ds, treaty positioning between the US and UK entities, transfer-pricing documentation, and quarterly reviews as the team grows. The CIOT directory sits at https://www.tax.org.uk/.

Get in touch with our team today at or visit https://www.us-uktax.com/ to talk through your UK hiring plan.

Conclusion

Three points to take away. First, the true cost of a UK hire is 18-22 percent above the gross salary on the offer letter, once Employer NIC at 15 percent, the £5,000 Secondary Threshold, and pension auto-enrolment are baked in. Model the on-cost before the offer goes out. Second, choose the right framework before the first UK payday — EOR for one to four hires, UK subsidiary for five-plus — because switching later costs time and money you would rather spend on product. Third, get the permanent establishment question answered early, because the UK Corporation Tax exposure for the US parent if it goes wrong dwarfs any savings from payroll. The US under the PA YE, payroll tax framework for UK employees, the PAYE framework rewards early decisions and punishes late ones. Talk to us at .

Frequently Asked Questions

Q: Does a US company need a UK entity to put a UK employee on payroll?

A: No, but the alternatives have real limits. An Employer of Record handles full UK compliance without you setting up anything in the UK, at a cost of roughly £550-£1,200 per employee per month, on top of salary. A DPNI scheme works for a single remote worker who is happy with the admin. Once you cross four or five UK hires, a UK Limited company is almost always cheaper and cleaner than continuing on EOR.

Q: What is the UK Employer NIC rate in 2025-26?

A: 15 percent on earnings above the Secondary Threshold of £5,000 per year. The rate rose from 13.8 percent on 6 April 2025, and the threshold fell from £9,100 in the same change. On a £70,000 salary, the combined effect adds roughly £2,000 in extra costs per employee compared to the old regime.

Q: How long does UK payroll setup take for a US company?

A: Six to ten weeks from start to first payday via Route A — direct PAYE through a UK Limited company. Two to three weeks of that is HMRC processing the PAYE registration, which cannot be rushed. EOR onboarding takes place within 10 working days because the EOR is already a registered UK employer.

Q: Does hiring a UK employee create a US tax problem for my US company?

A: It can. A UK-resident employee with authority to conclude contracts on behalf of the US parent may create a UK permanent establishment under Article 5 of the US-UK treaty, thereby subjecting the profits attributable to that PE to UK Corporation Tax. The risk is far lower if the employee works through a UK subsidiary or an Employer of Record. Get specialist advice before hiring UK sales or commercial staff.

Q: Do US companies have to enroll UK employees in a pension?

A: Yes, if the worker is aged 22 to State Pension age, earns over £10,000 a year, and works in the UK. The minimum employer contribution is 3 percent of qualifying earnings between £6,240 and £50,270. The Pensions Regulator's auto-enrolment rules apply equally to UK subsidiaries of US companies and to UK workers employed through an Employer of Record. There is no carve-out for foreign employers.

Q: What is RTI, and how often does it have to be filed?

A: Real Time Information is HMRC's monthly payroll reporting system. A Full Payment Submission must reach HMRC on or before the day the worker is paid — not the end of the month, not the next cycle. Late or missed FPS filings trigger automatic penalties of £100 per month for small employers. UK payroll software automatically handles submission once configured.

Q: Can I just treat my UK worker as an independent contractor?

A: Only if they genuinely are one. HMRC looks at the working relationship, not the label on the invoice. A worker with set hours, no substitution right, using your tools, and reporting to you day to day is an employee in HMRC's view, regardless of what the contract calls them. Misclassification triggers back taxes, back NIC, interest, and penalties — typically 12 to 24 months of payroll costs in catch-up liability.

Q: Can US-UK Tax help me decide between direct PAYE, DPNI, and EOR?

A: Yes. We run a cost-model session covering your three-year UK headcount plan, NIC and pension load, permanent-establishment exposure, and the lead time to first payday. Most engagements then move into setup if you pick direct PAYE, or into ongoing advisory if you go EOR. Fees for the strategic phase typically run £1,500-£3,500 fixed. Contact to book a session.