New Hire Paperwork Checklist: I-9, W-4, and Offer Letters for Small Businesses

When you hire your first employee, or your tenth, without an HR platform behind you, the paperwork does not disappear, it just lands on your desk. This checklist walks through the three documents every new hire actually needs before their first paycheck: Form I-9, Form W-4, and a signed offer letter, plus how to fill them in, collect signatures, and keep records straight using only a browser.

The Documents Every New Hire Needs Before Day One

Most new hire checklists assume you already run payroll or HR software that generates these forms automatically. If you are hiring without that infrastructure, here is the minimum set that federal law and basic good practice require:

• Form I-9 (Employment Eligibility Verification), required for every employee regardless of company size.
• Form W-4 (Employee's Withholding Certificate), required so you know how much federal income tax to withhold from the first paycheck.
• A signed offer letter, documenting the agreed title, pay, start date, and employment terms in case of a later dispute.
• State withholding form, if your state collects income tax separately from the federal W-4.
• Direct deposit authorization and an emergency contact form, both useful but not legally mandatory.

None of these require an HR system to produce. You can fill in a PDF directly in your browser, collect a legally binding signature, and store the finished document, without paying for a monthly HR seat you will only use a few times a year.

Filling Out and Verifying Form I-9

Form I-9 has two sections with two different deadlines, and mixing them up is the single most common compliance mistake small employers make.

1. Section 1 is completed by the employee, and it must be finished no later than their first day of work for pay. The employee enters their name, address, date of birth, and attests to their citizenship or work authorization status.
2. Section 2 is completed by you, the employer, within three business days of the employee's start date. You physically (or, under the alternative procedure, remotely) examine original identity and work-authorization documents, such as a passport or a driver's license plus Social Security card, and record the document details.

A detail that trips up employers in 2026: the current Form I-9 is dated 01/20/25 and carries an expiration date of 05/31/2027. Older editions remained usable for a transition period, but as of August 1, 2026, only the version showing the 05/31/2027 expiration date is valid for new hires. If you last downloaded the form more than a year ago, get a fresh copy before your next hire starts.

Missing or incomplete I-9s are one of the most commonly cited paperwork violations in Department of Homeland Security audits, and civil penalties scale per form, so a stack of a dozen incomplete I-9s from over the years is a real liability, not a paperwork inconvenience. If you are onboarding someone who is not physically in your office, our guide to filling and signing the I-9 for remote hires walks through the alternative remote verification procedure in detail. You can start from the blank template in our government forms library, fill in Section 1 with the employee, then complete Section 2 yourself and get both signatures captured through e-signature in the same session.

Collecting a Completed Form W-4

Unlike the I-9, there is no hard federal deadline for the W-4, but practically, you need it before you run the employee's first payroll, since it determines how much federal income tax comes out of that check.

The 2026 Form W-4 carries a few changes worth knowing before you hand it to a new hire:

• A new, clearer exemption checkbox for employees with no federal tax liability.
• The Step 3 child tax credit calculation increased to $2,200 per qualifying child under 17, up from $2,000.
• An expanded deductions worksheet, now on its own page, with new lines for qualified tips and overtime compensation under the One Big Beautiful Bill Act.

If a new hire simply does not turn in a W-4, you are required to withhold as if they had checked "Single or Married filing separately" with no other adjustments, which is almost always a higher withholding rate than the employee would otherwise choose. It is worth chasing the form down, not just defaulting silently. For the employee-facing side of this form, our step-by-step W-4 guide covers each line in plain language, and you can hand a new hire a link to fill it out themselves and return it for your records.

Sending an Offer Letter for Signature

An offer letter is not legally required in most states, but it is the document that prevents a "what did we actually agree to" dispute six months into the job. At minimum it should state:

Build the letter once as a document, then reuse it for every hire by editing the name, title, and pay line for each new offer with a browser-based PDF editor, or turn it into a reusable fillable template with form creation tools if you hire often enough that retyping the same letter gets old. Either way, send it for signature rather than asking for a reply-all "sounds good", since a signed document is what actually holds up if a disagreement surfaces later.

Keeping New Hire Records Organized

Retention periods differ by form, and getting them wrong in either direction (destroying records too early, or never organizing them at all) creates risk:

• Form I-9: keep for three years after the hire date, or one year after termination, whichever is later. Store I-9s separately from the rest of the personnel file, since auditors are allowed to request only I-9s, not the whole file.
• Form W-4: keep for at least four years after the tax is due or paid, whichever is later, consistent with general IRS employment tax recordkeeping rules.
• Offer letters: keep for the duration of employment plus a few years afterward, in case of a wage or termination dispute.

If you are hiring without a full HRIS, the practical move is a dedicated folder per employee, PDFs named consistently (last name, form, date), with I-9s kept in their own separate sub-folder as required. This is also where a one-time tool purchase beats a subscription: if you hire in bursts, a handful of people this quarter and then nobody until next spring, the One Week Plan at $3 covers exactly that burst without locking you into a monthly HR-adjacent subscription you will forget to cancel between hiring waves.

Bringing It Together

A new hire's first day should not turn into an afternoon of chasing signatures across three different apps. Pull the I-9 and W-4 templates, fill in what you know ahead of time, send the rest for the employee to complete and sign, attach the offer letter, and file all three in a folder the day the paperwork clears. None of it requires HR software, and all three documents can be filled, signed, and stored from the same browser tab.