Form I-9 Explained: The Requirement, the Penalties, and What It Signals at Onboarding

Every employer in the United States is legally required to complete Form I-9 for every person they hire, verifying identity and employment authorization. The requirement comes from Section 274A of the Immigration and Nationality Act, codified at 8 U.S.C. § 1324a(b), and was established by the Immigration Reform and Control Act of 1986.¹ ² It applies to a five-person business and a Fortune 500 company alike, and it is one of the few compliance obligations that produces an observable record on an employee’s first days: the form is either completed correctly or it is not.

This guide covers what the law requires, the current penalty and enforcement landscape, and how the onboarding process can be read by both sides of the hiring relationship.

What the Law Requires

Employers must review original identity and work authorization documents and complete Section 2 of the form within three business days of an employee’s start date. The completed form must be retained for three years after the date of hire or one year after employment ends, whichever is later.² A missing or incomplete form is a statutory violation from the employee’s start date, whether or not it is ever inspected.

Penalties and Enforcement Trends

As of the January 2025 inflation adjustment, paperwork violations carry civil penalties of $288 to $2,861 per form, and knowingly employing unauthorized workers carries penalties of $716 to $28,619 per worker, with higher amounts for repeat violations.³ ⁴ In early 2026, ICE narrowed the list of “technical” errors eligible for a 10-day correction window, reclassifying more than a dozen error categories as substantive violations subject to fines without a correction period.⁵ In practice, this reduces the opportunity to fix errors after the fact.

Enforcement activity has also increased. Notices of Inspection issued in 2025 ran substantially higher than in prior years, and reporting indicates that field offices operated under quarterly worksite inspection targets.⁶ Hospitality and food service are among the sectors that receive more frequent audit attention, along with construction, agriculture, staffing, and manufacturing.⁶ ⁷ For employers in these sectors, a documented I-9 process is a significant part of overall compliance risk management.

What the Onboarding Process Shows to New Hires

I-9 compliance is usually discussed as an employer obligation. It is also one of the few compliance steps a new hire can observe directly, because it requires the employee to present documents and complete Section 1 in person.

The same onboarding session typically covers the W-4 and the employee’s classification, which underlie accurate pay, tax withholding, and eligibility for wage and workers’ compensation claims.⁸ Most other compliance obligations, such as payroll accuracy and wage-and-hour practices, happen out of the employee’s view.

Some operations and compliance professionals use a general auditing principle here: a visible control is often a useful proxy for the discipline of related, less visible processes. Applied to onboarding, a skipped or incomplete I-9 can be a reason to ask questions about how other paperwork is being handled. This is a heuristic rather than evidence. A missing form does not establish that pay or classification is wrong, and organizations can be strong in some areas while having gaps in others.

Interpreting It From Either Side of the Desk

For employers, the practical takeaway from the enforcement data is that I-9 completion benefits from being a controlled, documented process with a clear owner, a three-day completion check, and periodic internal audits, rather than an informal step.

For new hires, an incomplete I-9 process is one piece of information among many. Reasonable next steps include asking HR when the form will be completed, keeping copies of any documents provided, and reviewing early pay stubs for accurate withholding.

In both cases, the form is a small, visible part of the larger set of records that govern employment, and it is one of the easiest of those records to verify.

Works Cited

1. U.S. Citizenship and Immigration Services. “I-9, Employment Eligibility Verification.” uscis.gov/i-9
2. U.S. Citizenship and Immigration Services. “2.0 Who Must Complete Form I-9,” Handbook for Employers M-274. uscis.gov/i-9-central
3. Federal Register. “Imposition and Collection of Civil Penalties for Certain Immigration-Related Violations,” inflation-adjusted amounts effective Jan. 2, 2025. federalregister.gov
4. SHRM. “Navigating I-9 Compliance in 2025: What Employers Need to Know.” shrm.org
5. Morgan Lewis. “ICE Rewrites the Rules on Form I-9 Violations.” morganlewis.com
6. I-9 Intelligence. “ICE Audit Quotas & Worksite Crackdowns in 2025.” i-9intelligence.com
7. LiftHCM. “Understanding ICE and Its Role in the Restaurant Industry.” lifthcm.com
8. U.S. Immigration and Customs Enforcement. “Form I-9 Inspection Under Immigration and Nationality Act § 274A.” ice.gov/factsheets/i9-inspection