New Hire Document Checklist for US Employers: I-9 and More

This article is provided for information only and is not legal advice. Regulatory references are accurate as of the publication date (September 29, 2026). Check current federal and state rules with a qualified employment attorney before applying them to an individual file.

A new hire document checklist lists the papers a US employer collects before or on the first day of work: identity and work authorization for Form I-9, tax withholding forms, a Social Security number, payment details and any role-specific credentials. Collecting them is only half the job. Each document must be valid on the start date, readable, and consistent with the rest of the file, and the employer must not ask for more than the law allows. This guide gives the US checklist, the validation logic behind it, and a comparison with the UK, France, Germany and Spain for teams that hire across borders.

What should a US new hire document checklist contain?

A complete US new hire file has five blocks: Form I-9 evidence, tax forms, state new-hire data, payment details and role-specific proof, with Form I-9 due within 3 business days of the start date per USCIS. The blocks are stable; the timing and the state add-ons are what change. The table below is a version most HR teams can adapt.

Ask only for what the job and the law require. Collecting extra identity documents "just in case" creates privacy exposure and, as covered below, discrimination risk.

How do you validate documents rather than just collect them?

Validation means three checks on every document, completeness, validity and cross-document consistency, and each maps to a field-level comparison, not a judgment about authenticity. Completeness asks whether every page and field is present. Validity asks whether dates and document types are acceptable on the start date. Consistency asks whether the same name, date of birth, address and account holder appear across the file.

Most onboarding delays come from the third check: a license reads "Katarzyna Nowak-Smith", the bank account is held by "K. Smith", and the W-4 uses a maiden name. Each needs a human decision before the first payroll run. A validation step compares fields, dates and registers and flags differences. It does not prove a document is genuine; it tells the HR officer where to look.

Our platform supports more than 3,200 document types and OCR extraction in 24 languages across 32 jurisdictions, so the same comparison logic works on a Green Card, an Employment Authorization Document, a state ID or a foreign passport. See how this works for HR teams on the human resources solution page.

United States: Form I-9 within three business days

Every US employer must complete Form I-9 for each new hire, with Section 1 done by the employee no later than the first day of work and Section 2 by the employer within 3 business days, as set out on USCIS I-9 Central. The employee chooses either one List A document (identity and work authorization together, such as a US passport or a Permanent Resident Card) or one List B document (identity, such as a state driver's license) plus one List C document (work authorization, such as an unrestricted Social Security card). The full lists are on the USCIS acceptable documents page.

The legal basis is the Immigration and Nationality Act (INA), the US counterpart of the UK Immigration, Asylum and Nationality Act 2006. Two practical points follow.

1. Reverification. Where the employee's work authorization expires, for example an EAD, the employer must reverify it. Diary the date 90 days ahead.
2. Documents must reasonably appear genuine and relate to the person. Reasonable means what a person would notice on an ordinary examination, not forensic analysis.

Do you have to use E-Verify, and which states require it?

E-Verify is voluntary for most private employers at federal level, but a number of states require it for some or all employers, and federal contractors covered by the FAR clause must use it; see e-verify.gov. The system compares Form I-9 data with Social Security Administration and DHS records; it is a record comparison, and a mismatch is a prompt for the employee to resolve it.

State mandates vary by employer size, sector and public or private status, and they change with new legislation. Before hiring in a new state, check that state's current requirement and whether it applies to your headcount. If you use E-Verify, create the case no later than the third business day after the employee starts, and apply the program to every new hire in the same way.

Which anti-discrimination rules apply to document requests?

Employers may not specify which List A, B or C documents an employee presents, and violations of the INA anti-discrimination provision (8 U.S.C. 1324b) are enforced by the Department of Justice's Immigrant and Employee Rights Section. The rule covers document abuse: demanding more or different documents than Form I-9 requires, or rejecting valid documents that reasonably appear genuine, when the request is motivated by the person's citizenship status or national origin.

The safe pattern is simple. Give every new hire the same instructions, show the full lists of acceptable documents, and accept any valid combination. Do not ask for a Green Card from someone who looks foreign, and do not refuse a valid state ID because you prefer a passport.

What tax and reporting steps come after the I-9?

Employees complete Form W-4 for federal withholding, and employers must report each new hire to the state directory generally within 20 days of the hire date, as described by the IRS and state workforce agencies. Many states also require their own withholding certificate, so the work location decides which forms go into the file. A few states set shorter reporting windows, so check the deadline for the state where the employee works.

The Social Security number is collected for wage reporting on the W-4 and payroll records. It is not a Form I-9 requirement, and the employer should not refuse a candidate who has proof of work authorization but has not yet received an SSN; the employee can provide it after hire. Validate the SSN format and name match against the W-4, and store the number with restricted access.

How long must you keep new hire documents, and what about privacy law?

Retain each Form I-9 for 3 years after the hire date or 1 year after employment ends, whichever is later, per USCIS retention guidance. Keep the I-9 separate from the personnel file so an inspection request does not expose unrelated data.

The US has no single federal equivalent of GDPR. State laws fill the gap, and the California Consumer Privacy Act as amended by the CPRA covers employee and applicant data, with notice-at-collection obligations, per the California Attorney General. Other states have privacy laws with differing employee-data exemptions, so map your headcount by state.

How does the US compare with the UK, France, Germany and Spain?

In every market the employer must prove work authorization and register the hire, but the timing differs: the US allows 3 business days after start for the I-9, while the UK requires the check before start. The table shows the pre-hire filing, the core identifier and the work authorization check for each country.

The UK share code plays a role similar to E-Verify, a live government record, and the UK Biometric Residence Permit corresponds to a Green Card or EAD. For hires who move between the US and the UK, our guide on HR document verification, diplomas and the right to work covers the credential side.

Which mistakes cost HR teams the most time?

The most frequent delays are Section 2 completed after the third business day, work permits that expire shortly after the start, and names that differ between documents. A short list of controls prevents most of them:

1. Record every EAD expiry date and set a reminder 90 days ahead.
2. Compare names across the ID, offer letter, bank account and W-4 before payroll setup.
3. Complete Section 2 inside the 3-business-day window and log the date.
4. Give every hire the same document instructions.

Staffing firms face the same steps on a shorter clock; see the temp worker first assignment checklist. The industry verification guide maps other file types.

A digital file that validates each item on upload and flags expiry within 90 days is easier to defend in an I-9 audit than a PDF checklist. Pricing for that step is on the pricing page, and how files are stored is described on the security page.

To run these checks on your own onboarding files, start from the CheckFile solution for HR teams, which compares fields, dates and registers across the documents in a new hire file.

Frequently Asked Questions

What documents do I need from a new employee in the US?

At minimum, the employee's Form I-9 evidence (one List A document, or one List B plus one List C), a completed W-4, any state withholding form, and payment details. Add licenses or degrees only where the role requires them.

Can a new hire start before the I-9 is complete?

Section 1 must be completed by the first day of work, and Section 2 within 3 business days of the start. Employers cannot delay the start to demand particular documents, and they cannot refuse to hire because the employee will present the documents later within that window.

Does validating a document prove it is genuine?

No. Validation compares dates, formats and fields across documents and against reference data, and highlights inconsistencies for a person to review. It complements, and does not replace, the legally required I-9 examination.