A new hire forms checklist for a U.S. employer starts with three items required by law for every employee: a Form I-9 to verify work authorization, a Form W-4 for federal tax withholding, and a new hire report to the state directory. Most states add their own withholding certificate, and almost every employer layers on payroll, benefits, and internal agreements. The deadlines are tight, and the fines for missing them run into the thousands per employee.
The Core Checklist
For a standard W-2 employee, the paperwork breaks down into three categories.
Required by federal law:
- Form I-9, Employment Eligibility Verification
- Form W-4, Employee’s Withholding Certificate
- New hire report to the state directory of new hires
Required in most states or by circumstance:
- State (and sometimes local) tax withholding certificate
- E-Verify submission, if the employer is a federal contractor with qualifying contract language or operates in a state that mandates it
Standard business practice, not a single federal mandate:
- Direct deposit authorization
- Benefits enrollment forms, including 401(k) or 403(b) auto-enrollment notices where applicable
- Offer letter or employment agreement
- Non-disclosure agreement
- Employee handbook acknowledgment
Independent contractors follow a separate track, covered further down.
Form I-9: Deadlines and Documents
The I-9 is the highest-stakes form in the packet. Every employer must complete one for each person hired, regardless of citizenship status.1U.S. Citizenship and Immigration Services. I-9, Employment Eligibility Verification
The employee completes Section 1 no later than their first day of work. They can fill it out any time after accepting the offer, but not later than day one. It collects legal name, address, date of birth, and an attestation of citizenship or immigration status.2U.S. Citizenship and Immigration Services. Completing Section 1, Employee Information and Attestation
The employer completes Section 2 within three business days of the hire date. This step requires examining original documents that prove both identity and work authorization.3U.S. Citizenship and Immigration Services. Form I-9 – Employment Eligibility Verification Acceptable documents fall into three lists:
- List A documents prove both identity and work authorization on their own, such as a U.S. passport or permanent resident card.
- List B documents prove identity only, such as a driver’s license or state ID.
- List C documents prove work authorization only, such as a Social Security card or birth certificate.
The employee presents either one List A document or one document from List B plus one from List C. The employer records the document titles, issuing authorities, numbers, and expiration dates. Employers cannot dictate which documents the employee brings. Demanding a passport instead of a license-and-Social-Security-card combination can trigger a discrimination claim.
Employers enrolled in E-Verify and in good standing may examine I-9 documents remotely by video call instead of in person, but only at hiring sites where E-Verify is used, and the option must be offered consistently to all employees at that site.4U.S. Citizenship and Immigration Services. Remote Examination of Documents A company can limit remote examination to fully remote hires while requiring in-person inspection for onsite staff, as long as the distinction is not based on citizenship or national origin.
Form W-4 and State Withholding
The Form W-4 tells the employer how much federal income tax to withhold from each paycheck. Every new employee should complete one at hire, and it can be updated any time thereafter.5Internal Revenue Service. About Form W-4, Employees Withholding Certificate Only the name, Social Security number, filing status, signature, and date are required; the remaining steps refine accuracy for dual-income households, dependents, and additional withholding. An employee can claim exemption from withholding only if they had zero federal tax liability last year and expect none this year.6Internal Revenue Service. Form W-4 Employees Withholding Certificate
Most states with an income tax require a separate withholding certificate. Some states accept the federal W-4 and calculate state withholding from it; others use their own form with a different allowance structure. The correct version is usually available from the state department of revenue. States with no income tax skip this step.
New Hire Reporting
Federal law requires every employer to report each newly hired or rehired employee to a state directory of new hires.7Office of Child Support Enforcement. New Hire Reporting – Answers to Employer Questions The report must include seven data points: the employee’s name, address, and Social Security number; the date services for pay first began; and the employer’s name, address, and federal employer identification number.8Administration for Children and Families. New Hire Reporting
The federal deadline is 20 days from the hire date, though individual states can set a shorter window. Employers who file electronically may submit two monthly transmissions instead, spaced 12 to 16 days apart.9Office of the Law Revision Counsel. 42 USC 653a – State Directory of New Hires
When a Social Security Number Is Missing
Employers need each employee’s Social Security number for W-2 reporting and benefit tracking. If a new hire has applied for but not yet received a number, collect the worker’s full name, address, date of birth, and parents’ names, then enter “Applied For” in box a of the W-2 when filing.10Social Security Administration. Employer Responsibilities When Hiring Foreign Workers This comes up most often with foreign workers waiting on their card.
Contractors Get a W-9, Not a W-4
When the business hires an independent contractor rather than an employee, none of the employee forms apply. No I-9, no W-4, no new hire report. The contractor fills out a Form W-9 to provide a taxpayer identification number so the business can report payments on an information return.11Internal Revenue Service. Form W-9 Request for Taxpayer Identification Number and Certification The W-9 collects the contractor’s name, address, federal tax classification, and TIN.
For tax years beginning after 2025, the threshold for filing a 1099-NEC to report contractor payments increased from $600 to $2,000, with inflation adjustments starting in 2027.12Internal Revenue Service. General Instructions for Certain Information Returns The higher reporting threshold does not change when to collect the W-9. Best practice is to get it before the first payment, whatever the expected total.
Misclassifying an employee as a contractor to avoid payroll taxes is one of the most heavily penalized mistakes in employment law.13Internal Revenue Service. Worker Classification – Employee or Independent Contractor
Payroll and Benefits Enrollment
A direct deposit authorization form collects the employee’s bank name, account type, routing number, and account number, along with instructions for splitting deposits between accounts. Most employers ask for a voided check to confirm the numbers. The employee signs to authorize electronic credits.
Employers offering a 401(k) or 403(b) plan established after December 29, 2022, must automatically enroll eligible employees under the SECURE 2.0 Act, with an opt-out window. Employees must receive an automatic enrollment notice before it takes effect and again each year.14U.S. Department of Labor. Automatic Enrollment 401(k) Plans for Small Businesses Even for plans that predate the mandate, employers must distribute a summary plan description to every participant.
Internal Agreements
An offer letter typically confirms job title, compensation, start date, and whether the position is at-will. It is not required by federal law, but skipping it invites disputes over pay and duties later. Some employers fold it into a broader employment agreement covering termination and dispute resolution.
Non-disclosure agreements protect trade secrets and proprietary information, defining what counts as confidential, how long the restriction lasts after employment ends, and the consequences of a breach. Signing is often a condition of the offer.
A handbook acknowledgment form confirms the employee received and reviewed company policies on conduct, leave, safety, and related topics. This acknowledgment creates a paper trail that employers rely on in wrongful termination disputes.
E-Verify
E-Verify cross-references I-9 data against Department of Homeland Security and Social Security Administration records to confirm work authorization.15E-Verify. E-Verify Overview It is not required for all employers. Federal contractors with qualifying contract language must use it, and several states mandate it for some or all employers.16E-Verify. Federal Contractors Many other businesses enroll voluntarily, in part because enrollment unlocks the remote I-9 document examination option.
Storing the Forms
Form I-9 must be retained for three years after the hire date or one year after employment ends, whichever comes later.1U.S. Citizenship and Immigration Services. I-9, Employment Eligibility Verification Store I-9s separately from general personnel files so they can be produced quickly during a federal inspection without exposing unrelated employee information.
Medical records and disability-related information follow a stricter rule. The ADA requires employers to keep any medical data in a separate confidential file, accessible only to designated personnel with a legitimate need.17U.S. Equal Employment Opportunity Commission. Enforcement Guidance on Disability-Related Inquiries and Medical Examinations of Employees Filing a doctor’s note into someone’s general HR folder is a textbook ADA violation.
What It Costs to Get It Wrong
A single I-9 paperwork violation — a missing signature, an unchecked box, a late Section 2 — carries a civil penalty of $288 to $2,861 per affected employee under the most recent federal adjustment. Across dozens of hires, the numbers compound quickly.18Federal Register. Civil Monetary Penalty Adjustments for Inflation
Knowingly hiring an unauthorized worker sits in a higher tier:
- First offense: $716 to $5,724 per unauthorized worker.
- Second offense: $5,724 to $14,308 per unauthorized worker.
- Third or subsequent offense: $8,586 to $28,619 per unauthorized worker.
These ranges are adjusted for inflation periodically.18Federal Register. Civil Monetary Penalty Adjustments for Inflation As of early 2026, federal enforcement has reclassified many errors that used to be treated as correctable technical mistakes into substantive violations that trigger immediate fines. The old practice of fixing minor errors after an audit notice is largely gone, so building a checklist that gets each form right the first time is worth the setup effort.