US Payroll, Accounting & HR Compliance Checklist for Foreign Companies

By the Seal Global Content & Search Strategy Team · August 17, 2026

Compiled by the operations enablement team that registers federal and state employer accounts, stands up payroll and benefits, and runs the monthly close for foreign-owned US entities.

Foreign companies rarely underestimate US salaries. What they underestimate is everything attached to a salary: the registrations that must exist before a first payroll can run, the states that each add their own accounts, and the filing calendar that starts the day someone is hired and never stops. This checklist is the working version we use inside US market entry operations enablement programmes, and it assumes you want the infrastructure right before anyone starts, not after the first penalty notice.

What Is US Payroll Compliance for a Foreign Company?

US payroll compliance is the recurring set of federal, state and sometimes local obligations a foreign-owned employer takes on the moment it pays a US worker: federal and state employer registrations, income tax withholding, FICA and FUTA contributions, state unemployment insurance, new hire reporting, workers' compensation coverage, and quarterly and annual filings. It is operational compliance infrastructure rather than commercial go-to-market activity, and it is enforced by penalties rather than by market forces.

The important structural point is that there is no single "US payroll system". There is a federal layer, then fifty state layers with different registration processes and deposit calendars, then a patchwork of city and county taxes. A company with employees in three states is running three compliance regimes simultaneously. Headcount planning and payroll planning are therefore the same conversation, and it is a conversation that has to happen before offers go out.

Phase 1 — Registrations Before Your First Payroll

• EIN: the federal tax ID for the entity. One to three weeks by fax for a foreign responsible party filing Form SS-4; instant online only where the responsible party has an SSN or ITIN.
• State withholding tax account: required in every state where an employee physically performs work. Two to four weeks in most states.
• State unemployment insurance account: separate from withholding, with its own number and experience-rated contribution rate.
• Workers' compensation coverage: mandatory in almost every state, purchased before the first start date.
• New hire reporting: filed with the state directory, typically within 20 days of hire.
• Local taxes: city or county income and occupational taxes in jurisdictions such as parts of Ohio, Pennsylvania and Kentucky.
• Payroll provider onboarding: the provider needs every account number above before it will file on your behalf.

All of this presupposes an operating entity and a bank account. If either is still pending, start at US entity incorporation services and read our breakdown of US business bank account myths for foreign founders before you commit to a start date.

Phase 2 — The Payroll Tax Layer

Employers withhold federal income tax plus the employee's 6.2% Social Security and 1.45% Medicare contributions, and applicable state and local income tax. The employer separately pays a matching 6.2% and 1.45%, federal unemployment tax on the first $7,000 of wages per employee, and state unemployment tax at rates that vary widely by state and industry. Deposit frequency is monthly or semi-weekly depending on prior-period liability, with a next-day rule above a $100,000 threshold. Form 941 is quarterly, Form 940 is annual, and W-2s are due to employees and the Social Security Administration by 31 January.

Budget 20% to 30% above base salary for employer taxes, benefits and insurance. A $90,000 engineer is a $110,000 to $117,000 annual commitment before equipment, software or recruitment cost.

Phase 3 — HR Compliance Obligations

• Offer letter and at-will language reviewed against state law, plus IP assignment and confidentiality terms.
• Form I-9 employment eligibility verification completed within three business days of the start date, with correct retention.
• State wage notices at hire and on any pay change in states such as New York and California.
• Mandatory workplace posters — physical or electronic for remote staff.
• Overtime classification under the Fair Labor Standards Act plus stricter state salary thresholds.
• Paid sick leave and family leave where state or city ordinances require it.
• Anti-harassment training mandated in several states on a recurring schedule.
• Final pay timing on termination, which in some states is the same day.
• Personnel record retention schedules that differ by document type.

Health insurance is federally mandated only at 50 or more full-time equivalents, so most first-stage US operations are not required to offer it — but US candidates expect it, and its absence is a recruiting problem long before it is a compliance problem.

Phase 4 — The Accounting Calendar That Runs Alongside

Payroll data feeds most of your other filings, so a clean payroll register is the foundation of the close. The recurring set includes US GAAP bookkeeping, a monthly close that reconciles payroll liabilities, federal and state corporate income tax, franchise tax, sales tax where nexus exists, Form 5472 for foreign-owned entities with reportable transactions, 1099 reporting for contractors, and transfer pricing documentation for intercompany charges. Our outsourced accounting services team runs this as a dated calendar, with a fractional CFO layer where parent reporting or transfer-pricing policy is material.

Employer of Record vs. Running Your Own US Payroll

Most foreign companies should not treat this as a permanent choice. Use an employer of record to get the first hires productive, build the entity and registrations in parallel, then migrate. The mechanics of that bridge are in our guide to hiring a US employee without a US entity.

The Misclassification Trap

Paying a full-time, directed, exclusive US worker as an independent contractor is the most expensive shortcut in this entire checklist. Several states apply a strict ABC test under which most such arrangements fail. Exposure includes back payroll taxes, unpaid overtime, penalties and interest, and enforcement is active. If the person works your hours, uses your systems and reports to your managers, they are an employee — the correct response is a compliant payroll route, not a differently-worded contract.

A Realistic 10-Week Payroll Readiness Timeline

1. Weeks 1–2: confirm entity and EIN; decide employer of record versus own payroll; map the states where work will be performed.
2. Weeks 2–5: file state withholding and unemployment registrations; bind workers' compensation; select payroll provider.
3. Weeks 4–7: benefits carrier selection and enrolment; HR document pack drafted; handbook and policies localised by state.
4. Weeks 6–9: payroll provider configured with all account numbers; parallel test run; chart of accounts and close calendar built.
5. Weeks 8–10: first live payroll; new hire reporting filed; quarterly filing calendar handed to accounting.

Related Reading

• US Market Entry & Operations Enablement Services — registrations, payroll and compliance as one programme.
• US Entity Incorporation Services — the entity and EIN every registration depends on.
• US Business Bank Account Myths for Foreign Founders
• How to Hire a US Employee Without a US Entity
• Outsourced Accounting Services — the close calendar that payroll feeds.