Year-End Payroll: A Small Business Checklist

Year-end payroll is not difficult. It is just badly timed, because almost everything on the list depends on somebody else answering you, and the month you need those answers is the month nobody is at their desk.

That is the actual insight worth having about this topic, and it reframes the whole task. The reason year-end goes wrong at small companies is not that the forms are complicated. It is that in the last week of December you discover you need a Social Security number from a contractor who has stopped replying, or an address from someone who moved in August, or a signed W-4 that was never collected. In October those are five-minute problems. In January they are the reason you file late.

So this guide is organized as a timeline rather than a list. What to do in October, November, December, and January, the deadlines for the current cycle, the tasks your payroll provider quietly does not do for you, what changed on the 2026 W-2, and how to reconcile before you file rather than after an agency writes to you. To be clear about what FirstHR is: an HR and onboarding platform, not a payroll provider. It does not run payroll or file taxes. It keeps the employee records that year-end depends on accurate. This is general information rather than tax advice, and you should confirm current deadlines and figures before relying on them.

The Short Answer

Year-end payroll is the process of closing out the payroll year and meeting your annual reporting obligations: verifying employee data, reconciling wages and withholding, running the final payroll, filing W-2s with the Social Security Administration, issuing 1099-NECs, and filing your fourth-quarter and annual tax returns.

Start in October. Every task that becomes painful in January is easy three months earlier, and the difference is entirely about whether the people you need answers from are available.

What Year-End Payroll Means

The phrase covers more than the December payroll run, which is the common misunderstanding.

Two framings help. Year-end payroll is the year proving itself out: every payroll you ran must now sum to something you file, and any error from March that nobody caught surfaces here. And it is mostly a data problem rather than a tax problem, which is why the timeline below is weighted so heavily toward October.

The October to January Timeline

Most guides give you a checklist. A checklist is fine in November and useless on December 28, because half the items assume a response from someone. Here it is by month instead.

The single most valuable line in that whole timeline is the first one: ask every employee to confirm their name, address, and Social Security number in October. A name that does not match the Social Security card produces a mismatch notice and a corrected W-2. A stale address means a W-2 arrives at the wrong house in February. Both cost minutes to prevent and hours to fix.

What Your Provider Does Not Do

This is the section competing guides skip, presumably because most of them are written by payroll providers. If you use one, the boundary of what they handle is not where most owners assume it is.

The pattern is consistent and worth stating plainly: your provider processes what you give it. It calculates correctly, deposits on schedule, and files on time, all based on data it did not gather and cannot verify. Every failure in the amber rows produces a correct calculation on wrong inputs, which is the most expensive kind of error because nothing looks broken.

That is also why year-end at a small company is an HR task wearing an accounting costume. The work is confirming that the people, statuses, classifications, and documents are right. The tax part is largely automated.

Before the Final Payroll

Seven checks before you run payroll for the last time in the year. Anything you find here is a correction inside your own records. Anything you find afterwards is an amended filing.

Fringe Benefits and Bonuses

Two things that have to happen before the final payroll rather than after it, and both are routinely missed by businesses without a payroll administrator.

Taxable fringe benefits are non-cash compensation that must be included in wages. The rule is broad: a fringe benefit is taxable unless a specific exclusion applies. Personal use of a company vehicle, gift cards of any amount, certain group-term life insurance coverage, and most cash-equivalent perks all belong in wages. If they were never run through payroll during the year, the final run is your last chance to add them without amending anything.

Bonuses are supplemental wages and carry their own withholding rules. The practical point is timing rather than mechanics: a bonus paid in January is next year's wages, and a bonus paid on December 31 is this year's. Decide which you want, and tell whoever runs payroll before the run rather than during it.

The Forms and Who Gets What

Five forms cover almost every small business, and the confusion is usually about which agency receives which.

Two details that trip people up. W-2s go to the Social Security Administration, not the IRS, which surprises almost everyone the first time. And the general instructions for Forms W-2 and W-3 are the authoritative reference when a box is ambiguous, which is more often than you would like.

On e-filing: if you file ten or more information returns in total, electronic filing is mandatory. The threshold aggregates across form types rather than counting each type separately, so six W-2s plus four 1099-NECs reaches it. That threshold dropped from 250 to 10 in 2024 and pulled a great many small businesses into mandatory electronic filing who had always filed on paper.

The Deadlines

The dates shift each year with the calendar, and the current cycle has a shift worth knowing in advance.

The 1099-NEC point deserves emphasis because it catches people who remember the old rules. Most 1099 forms give you until late February on paper or the end of March electronically to file with the IRS, even though the recipient copy is due earlier. 1099-NEC has no such split. Both copies are due on the same early date, and Form 8809 does not provide an automatic extension for it.

Confirm the current year's dates against the IRS employment tax due dates before you plan around them, since weekend and holiday shifts change them annually.

What Changed on the W-2

The W-2 you issue for this year is not the same form you issued last year, and the changes affect a wide range of ordinary small businesses rather than an exotic few.

Two clarifications that competitor coverage tends to blur. Code TT reports only the premium portion of overtime, the extra half in time-and-a-half, not the whole overtime payment. And unlike code TA, the TT amount is not excluded from Box 1: it is already in taxable wages, and the code simply identifies the portion the employee may deduct on their own return.

Where tips are reported under code TP, Box 14b must carry the Treasury Tipped Occupation Code. Employees can hold up to two codes if they earned tips in more than one qualifying occupation, and a non-qualifying occupation is reported as 000.

Contractors and the 1099 Threshold

The reporting threshold for 1099-NEC changed recently, and getting the timing right matters because the two figures apply to different years.

Two caveats regardless of the threshold. Backup withholding situations require a form no matter the amount. And the threshold is about reporting, not about classification: paying someone under $2,000 does not make them a contractor, and the misclassification question is entirely separate and considerably more expensive to get wrong.

The practical year-end task here is boring and important: collect W-9s before you need them. In January you need a taxpayer identification number from someone whose engagement ended in August and who has no particular incentive to reply quickly. In October they are still in touch with you.

The Reconciliation That Prevents Notices

One check, done before you file rather than after, prevents the most common category of year-end letter from a federal agency.

The sum of your four quarterly Forms 941 should equal the totals on your Form W-3. Check four things individually rather than in aggregate: total wages, federal income tax withheld, Social Security wages, and Medicare wages. The IRS and the Social Security Administration each perform this comparison after you file, and a mismatch produces a notice from one of them.

This is the same activity described in the payroll reconciliation guide, applied annually. If you have been reconciling quarterly, the year-end version is a formality. If you have not, this is where nine months of small discrepancies present themselves at once.

If You Have People in More Than One State

A growing small business acquires multi-state payroll almost by accident, usually the first time someone works remotely from somewhere else, and year-end is when the consequences arrive.

The last item in the second column is the most common multi-state error at small companies and it is entirely avoidable. State unemployment rates arrive by mail or in a state portal in late autumn or early in the new year, are specific to your business based on claims history, and change. A payroll system carrying last year's rate underpays quietly all year.

Setting Up the New Year

Year-end is only half the job. Five things reset in January and getting them wrong affects every run until somebody notices.

The deposit schedule row is the one that produces penalties. Your required deposit frequency is determined by your tax liability in a prior lookback period, which means it can change from one year to the next without anything else about your business changing. Confirm it rather than assuming continuity.

Where Small Businesses Get This Wrong

Six patterns, and the first is responsible for most of the January stress.

If you change one habit, make it the October data request. It is a single email, it takes people a minute to answer, and it removes the entire category of problem that turns January from administrative into stressful.

Frequently Asked Questions