Hiring someone triggers a stack of federal obligations with deadlines measured in days. On or before the first day of work, the new employee completes Section 1 of Form I-9 and signs a Form W-4. Within three business days, you complete Section 2 of the I-9. Within 20 days, you report the hire to your state. Miss any of these and the penalties are real: I-9 paperwork errors alone run $288 to $2,861 per form. The rest of the employee onboarding requirements—benefits notices, workplace posters, and record retention—layer on top with their own timelines.
Form I-9: Verifying Work Authorization
Every employer must confirm that a new hire is legally authorized to work in the United States, and Form I-9 is how you document it. The employee fills out Section 1 no later than their first day of work, providing their legal name, address, date of birth, and citizenship or immigration status. You complete Section 2 within three business days of the hire date by physically examining original, unexpired documents and recording each document’s title, issuing authority, number, and expiration date.1U.S. Citizenship and Immigration Services. Instructions for Form I-9, Employment Eligibility Verification Both parties sign under penalty of perjury.
The employee chooses what to present: one document from List A (a U.S. passport or Permanent Resident Card, for example) proves both identity and work authorization. Alternatively, one document from List B (identity, such as a driver’s license) paired with one from List C (work authorization, such as a Social Security card or birth certificate) does the same job.2eCFR. 8 CFR 274a.2 – Verification of Identity and Employment Authorization
Watch for the short-term hire trap. If a job will last fewer than three business days, Section 2 must be done on the first day of employment, not later.
Remote Document Examination
Employers enrolled in E-Verify can examine documents remotely. The employee transmits front-and-back copies and then displays the originals on a live video call. Section 2 must still be completed within three business days, and you must retain clear copies for potential audits. The option has to be offered consistently to all employees at a given hiring site, though you can limit it to fully remote hires while examining onsite workers’ documents in person. Any employee who prefers a physical examination must be allowed one.3Federal Register. Optional Alternative 1 to the Physical Document Examination Associated With Employment Eligibility Verification (Form I-9)
I-9 Penalties
Paperwork violations—missing fields, late completion, or failure to retain—carry civil fines between $288 and $2,861 per form. Knowingly hiring an unauthorized worker is much steeper: $716 to $5,724 per worker for a first offense, up to $28,619 per worker for a third or subsequent offense.4Federal Register. Civil Monetary Penalty Adjustments for Inflation The amounts are adjusted annually for inflation, so check current figures each January.
Form W-4: Federal Tax Withholding
Federal law requires each employee to submit a signed W-4 on or before their first day of work. You use the form to calculate how much federal income tax to withhold from each paycheck.5Office of the Law Revision Counsel. 26 USC 3402 – Income Tax Collected at Source If the employee doesn’t submit one, you must withhold as if the person filed single with no adjustments, which usually pulls more tax than the employee actually owes.
Only Step 1 (name, address, Social Security number, filing status) and Step 5 (signature) are required for the form to be valid; the middle steps handle optional adjustments for multiple jobs, dependents, and other income.6Internal Revenue Service. Form W-4, Employee’s Withholding Certificate (2026) An unsigned W-4 is not valid.
State Withholding Forms
The federal W-4 usually will not cover state income tax. Most states with a personal income tax have their own withholding form and will not accept the federal version as a substitute. If the employee fails to submit the state certificate, default withholding kicks in—typically single with zero allowances. Employers operating in more than one state should keep a checklist of each state’s form.
Reporting the New Hire to Your State
Federal law requires every employer to report each new hire to a state directory of new hires within 20 calendar days of the hire date. The report includes the employee’s name, address, and Social Security number, the date they first performed work for pay, and the employer’s name, address, and federal EIN. Employers who transmit reports electronically may use a twice-monthly schedule instead, with transmissions spaced 12 to 16 days apart.7Office of the Law Revision Counsel. 42 USC 653a – State Directory of New Hires Some states set shorter windows within the federal 20-day maximum, so confirm your state’s specific deadline.
Most employers file through an online state portal or by mailing a copy of the W-4 to the state’s central registry. The primary purpose of the database is locating parents who owe child support, which is why the requirement sits under the child support provisions of federal law.
Penalties are modest but real: the federal statute caps state-imposed fines at $25 per unreported new hire, or $500 if the failure results from a deliberate agreement between employer and employee to avoid reporting or file a false report.7Office of the Law Revision Counsel. 42 USC 653a – State Directory of New Hires
E-Verify: Required or Optional?
E-Verify is a web-based system that electronically matches I-9 information against Social Security Administration and Department of Homeland Security records. For most private employers it is voluntary. It is required only for two categories: employers holding federal contracts or subcontracts that include the Federal Acquisition Regulation E-Verify clause, and employers in states that mandate participation as a condition of business licensing.8E-Verify. 1.1 Background and Overview If you don’t fall into either category, running E-Verify is optional, though it does unlock remote I-9 document examination.9U.S. Citizenship and Immigration Services. Handbook for Employers M-274 – 1.2 E-Verify: The Web-Based Verification Companion to Form I-9
Benefits Notices at Hire
Several federal disclosures attach to onboarding and are easy to miss when the focus is on I-9s and W-4s.
ACA Marketplace Notice
Each new hire must receive a notice explaining their options for coverage through the Health Insurance Marketplace. The notice is timely if delivered within 14 days of the start date.10U.S. Department of Labor. Notice to Employees of Coverage Options
Summary Plan Description
If you offer health insurance, a retirement plan, or other ERISA-covered benefits, new participants must receive a Summary Plan Description within 90 days of becoming covered.11U.S. Department of Labor. Reporting and Disclosure Guide for Employee Benefit Plans The SPD explains what the plan covers, how it works, and how to file claims.
Health Plan Waiting Periods
Group health coverage cannot impose a waiting period longer than 90 calendar days before coverage begins. Every calendar day counts, including weekends and holidays.12eCFR. 45 CFR 147.116 – Prohibition on Waiting Periods That Exceed 90 Days Coverage can start earlier than day 91, but not later.
Workplace Posters and Safety Training
Federal law requires certain workplace posters to be displayed where employees can see them. The set that applies to you depends on which federal statutes govern your business, but the core group for most employers covers the Fair Labor Standards Act, the Family and Medical Leave Act, the Occupational Safety and Health Act, equal employment opportunity laws, and the Employee Polygraph Protection Act.13U.S. Department of Labor. Workplace Posters The Department of Labor’s online Poster Advisor identifies specific requirements. Federal contractors, agricultural employers, and other specialized operations may need additional postings.
Many OSHA standards require training on the safety hazards of a specific job. OSHA doesn’t set a single universal deadline, but the practical expectation is that training happens before the employee is exposed to the hazard. For jobs involving machinery, chemicals, or physical risk, folding safety training into the first day or first week is standard practice and the clearest way to demonstrate compliance.
Retaining Onboarding Records
Collecting paperwork is only half the obligation; federal law also sets minimum retention periods, and the timelines for I-9s and tax records don’t line up.
Form I-9 must be retained for three years after the hire date or one year after employment ends, whichever is later. For someone who worked less than two years, the three-year-from-hire rule controls; for longer tenures, you keep the form for one year after the last day.14U.S. Citizenship and Immigration Services. Handbook for Employers M-274 – 10.0 Retaining Form I-9 Destroying forms too early is itself a violation carrying the same $288-to-$2,861 paperwork penalty range.
The IRS requires employment tax records, including W-4s and payroll registers, to be kept for at least four years after filing the fourth-quarter return for the year.15Internal Revenue Service. Employment Tax Recordkeeping Many employers keep records longer as an audit buffer, but four years is the federal floor. A retention calendar tied to each hire date, tracking I-9 and tax destruction dates separately, prevents accidental early purges.