Form I-9, Employment Eligibility Verification, is the one federal form where the deadline is counted in business days, not calendar days. That single distinction trips up more HR teams than any other I-9 rule. Every U.S. employer must verify the identity and work authorization of everyone hired to work in the United States, and the verification has a clock that skips weekends and holidays. This guide breaks down the Section 1 and Section 2 deadlines, the retention math, and the rehire windows — each tied to its official source.
What Form I-9 Is — and Who Completes It
Form I-9 has three moving parts:
- Section 1 — completed by the employee (personal data and attestation of citizenship or immigration status).
- Section 2 — completed by the employer or an authorized representative (review and verification of documents).
- Supplement B, Reverification and Rehire (formerly Section 3) — used when work authorization expires or when rehiring.
Employers must make the form instructions and Lists of Acceptable Documents available to the employee. (USCIS Handbook for Employers, M-274, 2.0; Form I-9 Instructions.)
Section 1: No Later Than the First Day of Employment
The employee must complete and sign Section 1 no later than the first day of employment — the day they begin performing labor or services for wages. They may complete it earlier, but only after accepting a job offer. (USCIS M-274, 2.0; Form I-9 Instructions.) Employers cannot specify which documents the employee presents, and instances of backdating are a red flag during an inspection.
Section 2: Within 3 Business Days
The employer (or authorized representative) must complete Section 2 within three business days of the employee's first day of employment. USCIS uses a concrete example: "if the employee begins employment on Monday, you must complete Section 2 by Thursday." (USCIS M-274, 2.0; Form I-9 Instructions; ICE I-9 Inspection Fact Sheet.)
What counts as a "business day"? For I-9 purposes, a business day is any day the employer is open for business — physically or remotely carrying out business functions. (USCIS Handbook for Employers, M-274.) If a company is closed on Mondays, Monday is not a business day for that employer, so the three-day count moves accordingly.
Special case: if you hire someone for less than three business days, you must complete Section 2 no later than the first day of employment. (Form I-9 Instructions; USCIS M-274.)
E-Verify: The Same 3-Business-Day Window
Employers enrolled in E-Verify must create the E-Verify case within three business days of the employee's date of hire and examine documents either in person or through the DHS-authorized alternative procedure. Because Social Security numbers are required to create E-Verify cases, every employee whose eligibility will be verified in E-Verify must provide their SSN on Form I-9. (E-Verify Employer Quick Reference Guide, 3.1.)
The Remote / Alternative Examination Procedure (Effective Aug 1, 2023)
Since a DHS final rule took effect on August 1, 2023, employers enrolled in E-Verify and in good standing may remotely examine I-9 documents instead of in person. The qualified employer must, within three business days of the employee's first day: obtain and examine copies of the documents, conduct a live video interaction with the employee presenting the same documents, check the "alternative procedure" box on Form I-9, and retain clear copies. (DHS/USCIS; E-Verify guidance.) Employers not in E-Verify must still examine documents in person.
Retention Math: 3 Years vs 1 Year
Employers must retain each completed Form I-9 for three years after the date of hire, or one year after the date employment ends — whichever is later. (8 CFR 274a.2(b)(2)(i)(A); IRS; ICE.) This is a classic "which date wins" date calculation:
| Employee | Hire date | End date | 3-yr date | 1-yr date | Keep until |
|---|---|---|---|---|---|
| Example A | Jan 1, 2024 | Feb 1, 2025 | Jan 1, 2027 | Feb 1, 2026 | Jan 1, 2027 |
| Example B | Jun 15, 2023 | Dec 31, 2025 | Jun 15, 2026 | Dec 31, 2026 | Dec 31, 2026 |
In Example A the three-year mark wins; in Example B the one-year-after-termination mark wins. Forms must be producible within three business days of an inspection request. (8 CFR 274a.2; ICE.)
Rehire and Reverification Windows
- Rehire within 3 years: if you rehire someone within three years of the date their original Form I-9 was completed, you may either complete a new form or use Supplement B on the existing one — and if you use Supplement B, complete it within three business days of the rehire. After three years, start fresh with a new form. (USCIS M-274 / Supplement B guidance.)
- Reverification: for employees whose work authorization has an expiration date, complete Supplement B no later than the expiration date, using a current List A or List C document. USCIS suggests reminding affected employees at least 90 days beforehand. (USCIS M-274; Form I-9 Instructions.) U.S. citizens, noncitizen nationals, and lawful permanent residents who presented a Permanent Resident Card are never subject to reverification.
Penalties for Getting the Dates Wrong
Federal law splits I-9 penalties into paperwork violations and unlawful-employment violations. After the 2026 inflation adjustments, paperwork violations (missing signatures, late completion, expired form edition) range from about $288 to $2,861 per form, so even a small stack of incomplete forms can mean five-figure exposure. Knowingly hiring or continuing to employ an unauthorized worker carries steeper per-worker fines — roughly $716 to $5,724 for a first offense, scaling higher for repeat offenses — and potential criminal exposure. (8 USC 1324a; inflation-adjusted civil penalty amounts.)
Business Days vs Calendar Days — The Cross-Site Contrast
If your team also handles COBRA, note the mirror image: COBRA's 60-day election, 45-day initial-premium, and 30-day grace windows run on calendar days, while I-9's Section 2 runs on business days. The same date engine must support both conventions, or one of them will be wrong. DayFig's Days Between Dates Calculator reports the raw day count so you can apply the right rule, and our Business Days Calculator skips weekends and federal holidays for the I-9 window.
How DayFig Helps Track the I-9 Clock
- Find the Section 2 due date: add 3 business days to the first day of employment, excluding the days your company is closed.
- Check the retention date: compute both "hire date + 3 years" and "end date + 1 year," then take the later.
- Confirm a rehire: count business days from rehire and compare against the 3-year age of the original form.
Pair these with our Business Days Calculator so weekends and federal holidays never silently shrink a deadline.
Disclaimer
DayFig is a date and math tool, not an immigration or employment-law advisor. This article summarizes public USCIS, ICE, E-Verify, and 8 CFR guidance for general understanding and is not legal or immigration advice. For your specific situation, consult USCIS I-9 Central or a qualified professional.
Sources
- USCIS — Handbook for Employers (M-274), 2.0 Who Must Complete Form I-9
- U.S. Immigration and Customs Enforcement (ICE) — Form I-9 Inspection Under INA § 274A
- E-Verify — Employer Quick Reference Guide, 3.1 Form I-9 And E-Verify
- 8 CFR 274a.2 — Retention and Inspection of Form I-9 (via GovInfo)
- USCIS — I-9 Central (current Form I-9 edition 08/01/23 and instructions)
- DHS/USCIS — Alternative Document Examination Procedure effective August 1, 2023 (employers enrolled in E-Verify)
Sources retrieved August 14, 2026.