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US workforce guide

The federal employer baseline

Start with the real employing relationship, work authorization and federal payroll duties, then add state, local and construction requirements.

Research date: 2026-09-30Federal & employer setup · Detailed guide

1. Identify the employer and obtain its EIN

An employer identification number identifies a business for federal tax purposes. It does not grant permission to work, establish a worker’s classification or register the business with every state. International applicants must use the IRS application method that fits their circumstances.

  1. Name the entity that hires, directs and pays the workers.
  2. Confirm whether that entity already has the required EIN.
  3. Use the IRS instructions to choose the appropriate application process.
Form / processPurposeWho acts
SS-4
Application for Employer Identification Number (EIN)		Application for an EIN when the SS-4 process is applicable.Responsible business applicant or authorized third party

Official sources

2. Resolve work authorization before payroll

A payroll account does not establish that an overseas worker can perform a US construction assignment. Visitor or ESTA business travel is not a general route for productive labor. H-2B is a specific temporary nonagricultural process with eligibility, labor-certification and immigration requirements; it is not an automatic construction-worker visa.

  1. Ask a qualified immigration adviser to assess the actual worker, employer, duties, location and dates.
  2. Treat the immigration route and its timing as a separate feasibility decision.
  3. Use the employer’s current Form I-9 process for employment verification; do not collect identity documents on this example website.
Form / processPurposeWho acts
I-9
Employment Eligibility Verification		Employer verification of identity and employment authorization under the applicable USCIS instructions.Employee and actual employer or permitted authorized representative

Official sources

3. Determine classification and employee withholding

Tax treatment follows the facts of the working relationship. Under the IRS common-law approach, the right to direct and control the work matters; calling a worker a contractor does not settle the question. Other federal and state laws may use different tests. Employees supply withholding instructions using Form W-4, with special guidance potentially relevant to nonresident aliens.

  1. Document classification using the applicable tests before choosing employee or contractor workflows.
  2. Obtain the current W-4 through the employer’s secure onboarding process.
  3. Have the payroll adviser assess any nonresident tax, treaty or special withholding questions.
Form / processPurposeWho acts
W-4
Employee’s Withholding Certificate		Employee instructions for federal income-tax withholding.Employee completes; employer applies and retains

Official sources

4. Distinguish tax deposits from tax returns

Federal payroll involves withholding, employer contributions, deposits, periodic returns and year-end wage statements. These have different purposes and schedules. Form 941 is commonly used for quarterly employment taxes, but some employers have different filing requirements. FUTA is an employer tax; its annual return does not make all deposits annual.

  1. Determine the employer’s required returns and deposit schedule using the current IRS instructions.
  2. Reconcile tax liabilities, actual deposits and employee wage records.
  3. Plan year-end employee statements, government filing and corrections.
Form / processPurposeWho acts
941
Employer’s Quarterly Federal Tax Return		Reporting of withheld federal income, Social Security and Medicare taxes and employer Social Security and Medicare taxes when applicable.Employer or authorized filer
940
Employer’s Annual Federal Unemployment (FUTA) Tax Return		Annual federal unemployment tax reporting when applicable.Employer or authorized filer
W-2
Wage and Tax Statement		Employee wage and tax reporting using the current filing and furnishing requirements.Employer or authorized filer

Official sources

5. Document the payroll provider’s authority

Outsourcing payroll does not, by itself, transfer the employer’s federal tax responsibilities. A service provider, reporting agent, Section 3504 agent and certified professional employer organization are different arrangements. The actual arrangement determines authorization and responsibilities.

  1. Describe who calculates payroll, files returns, initiates payments and reconciles accounts.
  2. Confirm the correct federal and state authorizations before granting access.
  3. Keep the employer able to review liabilities, agency correspondence and payment evidence.
Form / processPurposeWho acts
8655
Reporting Agent Authorization		Authorization for specified reporting-agent functions; it is not a universal transfer of employer responsibility.Taxpayer employer authorizes the reporting agent

Official sources

6. Add the construction and state layers

Temporary staffing can involve safety duties for both the staffing employer and host. Covered federal or federally assisted construction can bring prevailing-wage, fringe-benefit and certified-payroll requirements. Workers’ compensation, state accounts and local employment rules need their own applicability review.

  1. Identify the worksite, host contractor, trade, project funding and contract type.
  2. Allocate safety induction, hazard training and incident reporting responsibilities.
  3. Add the relevant state guide and local requirements before treating a checklist as project-specific.

Official sources

Before applying this guide

  • This is research for a worked website example, not a filing instruction or confirmation that a business or worker is eligible.
  • Requirements depend on the actual employer, worksite, worker residence, industry, contract and employment arrangement. Check the linked agency guidance before relying on a form or deadline.
  • Online services, form editions and filing rules can change. Checked dates record research, not a guarantee that every rule remains current.
  • This is a baseline research map, not a complete list of every applicable federal form.
  • No visa availability, sponsorship outcome, tax treatment or rapid operational-start guarantee is made.
  • Use current agency instructions for dates, editions, thresholds and special employer categories.
Keep responsibilities explicit.This is dated research, not a project-specific determination. Follow current official instructions and establish who is legally responsible for each action.
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