US New Hire Paperwork Checklist: Form I-9, Form W-4 and State New Hire Reporting

What paperwork does a new employee need to fill out in the US?

Every US employer collects a small set of federal forms for every employee, and most states add their own. The federal core is Form I-9 (employment eligibility verification) and Form W-4 (federal income tax withholding). Your state then expects a new hire report, and usually a state withholding form if the state has an income tax.

Around those forms sit the documents your own business needs: the offer letter, payroll and direct deposit details, benefits enrollment, signed policy acknowledgments and an emergency contact. Keep the legal forms and the company documents on separate checklists, because they have different owners, deadlines and retention rules.

When must Form I-9 be completed?

USCIS sets two deadlines. The employee completes Section 1 no later than the first day of employment, meaning the first day of work for pay. The employer then reviews the employee's documents and completes Section 2 within three business days of that date. USCIS gives a simple example: if the employee started work for pay on Monday, Section 2 is due by Thursday.

If the job will last less than three days, Section 2 is due on the first day of work for pay. Employees choose which acceptable documents to present from the lists on the form. You may not tell them which document to bring, so the most useful thing to send before day one is the list itself.

Retention is where small businesses slip. Keep each I-9 for as long as the person works for you, and after they leave until three years after the hire date or one year after employment ends, whichever is later.

• Send the list of acceptable documents with the offer, not the night before.
• Book a 15-minute document review on day one or two, so day three is never the deadline you are racing.
• Diarize every expiring work authorization document for reverification.
• Store I-9s separately from personnel files, so an inspection does not expose unrelated records.

What is new hire reporting, and how fast must you do it?

New hire reporting is a federal requirement that most first-time employers have never heard of. The federal Office of Child Support Services explains that employers must report basic information on new and rehired employees to the state where they work within 20 days of hire, and that some states require it sooner. The state forwards the report to the National Directory of New Hires.

California, for example, asks employers to report new or rehired employees working in the state within 20 days of their start-of-work date, and to report anyone rehired after a break of at least 60 consecutive days. If you hire in several states, federal rules let a multistate employer choose one state to report all new hires to, provided it reports electronically and registers that choice.

Most payroll providers file the report for you. Ask yours in writing whether they do, and keep the confirmation.

Which forms are needed before the first payroll?

Form W-4 tells you how much federal income tax to withhold. Collect it before the first payroll, because without it the employee's withholding has to follow the default rules and corrections later are slow and frustrating for both sides.

Add the state withholding certificate where the state has an income tax, direct deposit authorization, and benefits elections if the employee is eligible from day one. Run a test payslip for every new hire and check it with them in their first week. A wrong first paycheck sets the tone for the whole relationship.

What should the first 90 days look like after the paperwork?

Paperwork makes the hire legal; it does not make the hire productive. A simple rule works for teams of every size: decide before the start date what the person must know by day 1, by week 1, by day 30, by day 60 and by day 90, and who will teach each part.

Write a one-page plan per role with three columns: what they will learn, what they will deliver, and who checks it. Schedule a 30-minute check-in at days 30, 60 and 90, and at day 90 confirm whether the person is meeting the role standard. This is the point where most onboarding programs fade, so put the day-90 conversation in the manager's calendar on day one.

What are the most common new hire paperwork mistakes?

Most problems come from timing and storage rather than from the forms themselves. The fix is a dated checklist owned by one person, not good intentions spread across three people.

• Completing Section 2 of the I-9 after day three, or skipping the employer signature and date.
• Asking for specific I-9 documents instead of letting the employee choose from the lists.
• Forgetting the state new hire report because everyone assumed payroll filed it.
• Mixing I-9s into personnel files.
• Treating onboarding as finished once the forms are signed.