UK PAYE vs US Form 941: a payroll primer for global founders.

UK PAYE is reported in real time to HMRC on or before every pay date, with income tax and National Insurance deducted at source. US Form 941 is filed quarterly with the IRS, while the money is deposited monthly or semi-weekly. The UK loads more statutory cost onto the employer; the US loads more state-level complexity.

UK PAYE vs US Form 941: how do the obligations compare?

UK PAYE essentials

The UK's Pay As You Earn system has been mandatory and real-time for over a decade. Every pay event (typically monthly, sometimes weekly or fortnightly) triggers a Full Payment Submission (FPS) to HMRC on or before the day employees are paid.

What employers handle

• Income tax: deducted from gross pay using the employee's tax code. Tax codes change frequently; HMRC notifies via P9X/P9 notices.
• National Insurance Class 1 (employee): currently 8% on earnings between £12,570 and £50,270; 2% above. Different rates for directors and category-letter exceptions.
• National Insurance Class 1 (employer): 15% on earnings above the £5,000 secondary threshold from 6 April 2025, up from 13.8% above £9,100. Employers who qualify can offset up to £10,500 of that through the Employment Allowance.
• Pension auto-enrolment: employer must enrol all eligible workers (aged 22+, earning above £10,000) into a qualifying pension scheme. Minimum contributions: 3% employer, 5% employee.
• Apprenticeship Levy: 0.5% of pay bill, applies only to employers with annual pay bill above £3M.
• Statutory payments: sick pay (SSP), maternity (SMP), paternity, adoption, shared parental, all processed through PAYE.

Year-end

• P60: annual statement issued to each employee by 31 May, summarising the previous tax year's pay and deductions.
• P11D: by 6 July, reports benefits-in-kind (company cars, private medical insurance, etc.) for each employee. Class 1A NI payable by 22 July.
• Final FPS & EPS: submitted by 19 April marking the tax year-end.

US Form 941 essentials

The US employment tax system is more fragmented (federal employer taxes through Form 941, state income tax withholding through 50 separate state systems, plus state unemployment in every state), but the federal core is simpler than UK PAYE.

What employers handle (federal)

• Federal income tax withholding: deducted based on the employee's W-4. Tables are simpler than UK tax codes; the W-4 directly specifies allowances and additional withholding.
• FICA (Social Security + Medicare): 6.2% Social Security (capped at $176,100 wage base for 2026) + 1.45% Medicare, both employee and employer. Additional Medicare 0.9% on wages above $200,000 (employee only).
• FUTA (federal unemployment): 6% on first $7,000 of wages per employee, reduced to 0.6% effectively with state credit.
• SUTA (state unemployment): varies by state, typically 1–6% on a state-specific wage base.
• State income tax withholding: 41 states require it; each runs its own withholding rules and filing schedules.

Filing schedule

• Form 941: quarterly, due the last day of the month following each quarter (30 April, 31 July, 31 October, 31 January).
• Deposits: semiweekly (Wednesday/Friday) for larger employers; monthly for smaller. Deposits made via EFTPS.
• Form 940: annual FUTA return, due 31 January for the prior year.
• State filings: varies by state. Typically quarterly returns, sometimes monthly deposits.

Year-end

• W-2: issued to each employee by 31 January, sent to SSA by 31 January.
• 1099-NEC: issued to contractors paid $600+, by 31 January.
• State year-end returns: varies.

Where does cross-border payroll get complicated?

UK: directors

Directors of UK limited companies are taxed under different NI rules than ordinary employees, using either the "alternative" or "annual" calculation method. Mixing salary and dividends to optimise tax for owner-managed businesses requires careful planning. Most UK director-shareholders end up at a salary around the Personal Allowance plus dividends from retained profits. The trade-off is covered on accountants for freelancers and contractors and filed through UK Self-Assessment tax return filing.

US: multi-state employees

Remote employees create state-level complexity. A US company hiring its first employee outside its home state must register with the state's tax authority, set up state withholding, and (often) state unemployment. Some states have reciprocity agreements; most don't. Convenience-of-the-employer rules in some states (notably New York) can require withholding from non-resident employees performing work in-state for an in-state employer.

Cross-border employment

UK companies hiring US employees, or vice versa, face the question: employ directly (requiring registration in the foreign jurisdiction) or use an Employer of Record (EOR) like Deel, Remote, or Velocity Global. For small numbers (1–5 cross-border employees) EOR is almost always the right answer, the cost ($500–700/employee/month) is materially less than the cost of setting up a foreign entity for payroll alone.

Statutory benefits comparison

The big practical difference: UK employees come with statutory minimum entitlements that are real costs (sick pay, parental leave, holidays). US employees come with employer-provided health insurance as a market expectation (not legal requirement under 50 employees), which dwarfs anything on the UK list.

Hiring your first employee in a new jurisdiction adds 80–120 hours of compliance set-up. Use an EOR until you have enough headcount in-country to justify a real entity, typically 5–10 employees.

The bottom line

UK PAYE is administratively heavier (real-time submissions, complex tax codes) but conceptually simpler than US payroll. US Form 941 is operationally lighter (quarterly) but state-level fragmentation creates real complexity. For founders hiring across borders, decide one thing first: is the cost and friction of foreign-entity payroll worth it for the number of employees you're hiring? Usually it isn't. Start with an EOR, switch to direct payroll when scale demands it.

What does one hire actually cost on each side?

Worked example, illustrative rather than a real client, using the employer rates set out earlier on this page. Check the current year against HMRC's rates and thresholds for employers and IRS Publication 15 before budgeting from it, because both move annually.

The shape of the two numbers is the useful part. In the UK almost all of the loading is statutory and predictable, so the fully loaded cost of a hire is close to a formula. In the US the statutory loading is lighter but the discretionary loading, principally health cover, is heavier and varies enormously. A US budget built only from FICA and FUTA will be wrong by a wide margin once benefits are added.

What goes wrong in the first six months?

Four failures, and we see the same four repeatedly on takeover.

Filing on time and depositing late. In both systems the return and the money are separate obligations with separate penalties. US deposit frequency is set by a lookback period rather than chosen, and a semi-weekly depositor who pays monthly is late every single month while filing perfectly. The rules are in the IRS guidance on depositing and reporting employment taxes.

Treating an employee as a contractor. The cheapest-looking option at hire and the most expensive one at review. Both jurisdictions test the substance of the relationship rather than the wording of the agreement, and both will reassess with back tax, interest and penalties attached.

Missing the second jurisdiction. In the US that means a remote employee in a state where the company never registered for withholding or unemployment insurance. In the UK it means benefits in kind that were never reported, which surfaces at P11D time long after the cost was incurred.

Running payroll without a leaver process. Final pay, accrued holiday, pension opt-out records and the year-end forms all have deadlines that arrive after the person has gone and stopped chasing them.

HMRC's own starting point for UK employers is PAYE for employers and the operational detail is in running payroll. On the US side, Form 941 is the quarterly return everything else hangs off.

Employer of Record or your own entity?

Our position, and it is not the one that maximises our own fees: use an Employer of Record until you have roughly five people in the country, then move to a direct entity. Below five, the professional fees, registrations and ongoing filings of a foreign payroll rarely beat the EOR margin. Above five, the EOR per-head charge starts to look like a payroll department you are renting rather than employing.

The moment to switch early is when the foreign headcount includes someone senior enough to need equity, because share schemes through an EOR are awkward at best. That decision usually arrives with the first country lead, and it is worth planning a year ahead rather than discovering it during an offer negotiation.

We run payroll in both jurisdictions through our multi-jurisdiction payroll service, with UK PAYE handled for you and US payroll and Form 941 filing on the other side. Entity setup runs through company incorporation across five countries, the books through cloud bookkeeping services in Xero or QuickBooks, and the reporting through monthly management accounts. Founders trying to work out whether they need finance leadership as well as payroll should read when does a startup need a CFO.