Payroll Forms: The Complete Employer Guide
Every payroll form a small employer needs, organized by when it is due. W-4, I-9, Form 941, W-2, and the deadlines that moved this year.
Payroll Forms
Every form you collect, every form you file, organized by when it is actually due, and the two deadlines that moved this year
Every guide to payroll forms is a list. Nine forms, eleven forms, here is what each one does, here is a link to the IRS.
The list is not the problem. You can get the list from the IRS in thirty seconds. The problem is that a list tells you nothing about the two things that actually determine whether you get this right: when each form is due, and whether it is even your job.
Because payroll forms are not one category. They are two, and they behave nothing alike. Half of them are forms you collect from your employees and then hold, quietly, for years. The other half are forms you file with the government, on deadlines, with penalties. Different owners, different failure modes, different systems. And most small employers have one half handled by a payroll provider and the other half handled by nobody at all, without ever having noticed the split.
So this guide is organized the way the forms actually arrive: by timing, and by direction. Everything you collect at hire. The one form you file each quarter. Everything that lands in January. Plus the detail that will cost somebody money this year, which is that two of the four Form 941 deadlines moved. I build FirstHR, which is not a payroll processor and does not file anything with the IRS. It handles the other half, the forms you collect and then have to find again three years later. I will be exact about that boundary rather than blurring it. General information, not tax or legal advice.
What Payroll Forms Are
Payroll forms are the documents required to hire someone, pay them, and report those payments to the government. The category is broader than most people assume, because it stretches from a bank authorization form to a quarterly federal tax return.
That last line is worth pausing on, because it resolves a confusion in the vocabulary. When somebody says payroll tax forms or employment tax forms, they mean the ones you file with the government. When they say payroll forms, they usually mean everything, including the ones you collect. The terms are used loosely and interchangeably and they are not actually the same set.
Forms Go Two Directions
Here is the framing that makes the whole subject tractable. Every payroll form is either coming toward you or going away from you.
Now look at the failure modes, because they are opposites and that is the entire point.
If you miss a Form 941 deadline, you find out. A notice arrives, a penalty attaches, and the problem announces itself. It is unpleasant and it is bounded and you deal with it.
If you never collected an I-9, nothing happens. No notice, no penalty, no signal of any kind. The problem sits there, silently, for years, and you discover it on the day an inspector asks for the file, or a wage claim arrives, or you try to prove something and cannot. The forms with no deadline are the dangerous ones precisely because nothing is chasing you for them.
Every Form, By Timing
The master view. Not alphabetical, not by agency, but in the order the forms actually reach you.
The IRS maintains its own hub listing the employment tax forms, and it is the authoritative source for any form number. What it does not give you is the sequencing, which is the part that actually determines whether anything gets done.
Forms You Collect at Hire
Five forms, gathered before the first payday. This is the entire employee-facing side of payroll, and it happens once per person.
| Form | Who completes it | When | What happens if you skip it |
|---|---|---|---|
| W-4 | The employee | Before the first payroll run | You withhold as single with no adjustments. Not withholding at all is a failure, and the liability is yours |
| I-9 | Employee, then employer | Section 1 by day one. Section 2 within three business days | A paperwork violation that stands on its own, even where the person was genuinely authorized to work |
| State withholding certificate | The employee | Before the first payroll run | Wrong state withholding. Some states use their own form, some accept the federal W-4 |
| Direct deposit authorization | The employee | Before the first payroll run | You discover the bank details are missing on payday, which is the worst possible moment |
| New hire report | The employer, to the state | Generally within 20 days of the start date | Nothing, for a long time. This is the most-missed payroll form there is |
The new hire report deserves its own note, because it is invisible in a specific way. It is filed with the state rather than the IRS, so it appears on no federal tax calendar. Your payroll provider may not do it. The system exists mainly to enforce child support orders, so it has nothing to do with your taxes and therefore nothing to do with anything else you are already tracking. Nothing prompts you. It is simply a thing you are supposed to know about, and the way most employers learn about it is by not doing it. The mechanics of collecting the rest are covered in tax forms for new employees and the wider set in new hire paperwork.
The I-9 Problem
The I-9 gets its own section because it does not behave like any other payroll form, and almost every part of it is a trap.
It has the shortest deadline of anything in this article, measured in business days rather than months. It has a retention rule that cannot be calculated until the employee leaves. It has storage requirements that are unlike anything else. And unlike every tax form, nobody ever reminds you about it.
That retention rule is worth working through once, because both failure directions cost you. Per USCIS guidance, you retain the I-9 for three years after the date of hire, or one year after employment ends, whichever is later.
The practical shortcut: if somebody worked for you less than two years, the three-years-from-hire date will always be the later one. If they worked more than two years, the one-year-from-termination date will always be later. Destroy a form early and you have a violation you cannot cure. Keep everything forever and you have expanded the surface area of any future audit for no benefit, because every form you hold is a form that can be inspected.
The Quarterly Form
For most of the year, the entire government-facing side of payroll is one form, four times a year.
Form 941 is the Employer's Quarterly Federal Tax Return. It reports the federal income tax you withheld, plus both halves of Social Security and Medicare: the employee's share that you withheld and your matching share that you paid. It does not cover federal unemployment tax, which is a separate form entirely.
One version note that matters this year. Per the IRS instructions for Form 941, you use the March 2026 revision to report taxes for the first quarter of 2026, and the IRS expects that same revision to be used for all four quarters of the year. Do not use a saved copy of an earlier revision, and check the current instructions rather than a version you downloaded last year.
The Deadlines That Moved
This is the most immediately useful thing in this article, so here it is plainly: if you are working from last year's calendar, you will miss two deadlines this year.
The rule underneath it is simple and it is easy to forget. Form 941 is due the last day of the month following the end of the quarter. When that day lands on a weekend or a federal holiday, it moves to the next business day. In 2026, October 31 is a Saturday and January 31, 2027 is a Sunday. Both move.
There is also an extension that is worth knowing and is narrower than it sounds. If you deposited all of the quarter's taxes on time and in full, the IRS gives you an automatic ten additional calendar days to file the return. Per the IRS guidance on employment tax due dates, you do not need to request it. But it extends only the filing deadline, not the deposit deadlines, and it evaporates entirely if any single deposit during the quarter was late. It is not a grace period. It is a reward for a clean record.
Year-End Forms
January is when the rest of it lands, and it lands all at once.
| Form | What it reports | Goes to | Due |
|---|---|---|---|
| W-2 | Each employee's annual wages and withholding | The employee, and the Social Security Administration | January 31 |
| W-3 | The transmittal totaling all your W-2s | The Social Security Administration, with the W-2s | January 31 |
| Form 940 | Federal unemployment tax, which is employer-only | The IRS | January 31, or February 10 if all deposits were timely |
| 1099-NEC | What you paid each contractor | The contractor, and the IRS | January 31 |
| Form 944 | The annual substitute for the quarterly 941 | The IRS | January 31, and only if the IRS told you to file it |
| Form 945 | Nonpayroll withholding, such as from pensions or backup withholding | The IRS | January 31 |
Notice that almost everything is January 31. That single date carries the W-2s to the SSA, the W-2s to the employees, the 940, the 1099s to contractors, and the 1099s to the IRS. It is the busiest date in the payroll year by a wide margin, and it arrives immediately after the quarter that just ended, which is why the Q4 941 and the entire year-end package effectively collide.
Form 940 has a small extension worth knowing about: if you deposited all of your FUTA tax when it was due, you get an extra ten days, pushing it to February 10. Same principle as the 941 extension, same condition, same limitation.
Form 944 and Who Files It
A short section about a form most small employers have heard of and misunderstand.
Form 944 is an annual return that replaces the quarterly 941. Per the IRS, it is designed for the smallest employers, meaning those whose annual liability for Social Security, Medicare, and withheld federal income tax is $1,000 or less. One filing a year instead of four. It sounds like exactly what a five-person business wants.
Per the IRS page on Form 944, the form exists so the smallest employers file and pay once a year rather than every quarter. The eligibility threshold is low enough that most businesses with more than a couple of employees will exceed it quickly, which is another reason not to assume you qualify.
Contractor Forms
Contractors run on an entirely separate set of forms, and mixing the two sets up is the visible symptom of a much more expensive problem.
| Employee | Contractor | |
|---|---|---|
| Collects at hire | W-4 | W-9 |
| Verifies work authorization | I-9, required | No I-9. Contractors do not complete one |
| You withhold taxes | Yes. Income tax, Social Security, Medicare | No. Nothing at all |
| You pay employer taxes | Yes. Matching FICA, plus FUTA and state unemployment | No |
| Year-end form | W-2 | 1099-NEC |
| Appears on your Form 941 | Yes | No. Contractors are not on it |
If you find yourself collecting a W-9 from somebody you are treating as an employee, or issuing a pay stub to somebody who sent you an invoice, stop. The forms are downstream of the classification, and the classification is a legal test about the actual working relationship rather than a label you get to pick. Getting it wrong means back taxes, penalties, and potentially back overtime for the entire period, and it is worked through in employee versus contractor.
Forms You Might Also Need
Beyond the core set, a handful of forms show up for specific situations. Most small businesses will never touch most of these.
| Form | What it is | Who needs it |
|---|---|---|
| SS-4 | Application for an Employer Identification Number | Every employer, before anything else. Nothing can be filed without an EIN |
| Schedule B | Attachment to the 941, reporting liability by day rather than by quarter | Semiweekly depositors only. Skip it when required and the IRS may average your liability and penalize you |
| Form 943 | The annual return for agricultural employees | Farm employers. These wages do not go on the 941 |
| Form 945 | Nonpayroll withholding, such as pensions or backup withholding | Rare for a small business, but it exists and it is due January 31 |
| Form 8974 | Qualified small business payroll tax credit for research activities | Startups with R and D expenses, claiming the credit against payroll tax |
| Form 8655 | Reporting agent authorization | Filed when you authorize a payroll provider to file and deposit on your behalf |
| 1095-C and 1094-C | Health coverage reporting under the ACA | Applicable large employers, generally 50 or more full-time equivalents |
Form 8655 is the one worth flagging, because it is the paperwork that formally makes your payroll provider your agent. If you have a full-service payroll provider filing on your behalf, this is probably already signed and you probably have not thought about it since. It is worth knowing it exists, because it is the document that defines what they are actually authorized to do for you.
State Forms
Everything above is federal. On top of it sits a state layer that varies enormously and that follows the employee rather than the company.
Nine states have no personal income tax, which removes the state withholding certificate but leaves the unemployment registration and the new hire report firmly in place. And the whole state layer is a property of where the person actually works, which means a single remote hire across a state line adds a complete set of registrations and forms you have never encountered. That pattern runs through all of employment law, and payroll forms are one of its clearest cases.
How Long to Keep Them
The retention periods do not line up with each other, which is inconvenient and is also the reason people get them wrong.
| Record | Keep for | The catch |
|---|---|---|
| Payroll records generally | At least 3 years | This is the federal floor. Several states require longer, and the strictest rule that reaches any employee is the one to apply to everybody |
| Form W-4 | 4 years | Longer than general payroll records, and a year that does not match anything else |
| Form I-9 | 3 years after hire, or 1 year after termination, whichever is later | Not a fixed period. It is a comparison, and it cannot be calculated at all until the person leaves |
| Records after an employee leaves | The clock keeps running | Departure does not reset anything. Retention is measured from the record, not from the relationship |
The last row is the one that catches employers with a tidy filing habit. When somebody leaves, the instinct is to close their file. But their W-4 from two years ago still has two years left to run, and their I-9 may have four. Deactivating a departed employee and letting their records go with them is how you destroy something you were legally required to keep, and the broader picture is in how long to keep employee records.
Where the Forms Live
Retention is only half the question. The other half is retrieval, and it is the half that actually gets tested.
The standard to hold yourself to is not whether the form exists somewhere. It is whether you can produce a specific form, for a specific person, who left eighteen months ago, within three business days. That is the window you have for an I-9 inspection, and it is a reasonable proxy for every other document you hold.
Two structural points about storage that are worth getting right the first time, because they are nearly free to do and expensive to retrofit.
Keep the I-9s separate from the personnel file. Federal guidance recommends it and the reasoning is defensive: during an inspection, officials examine I-9s. If your I-9s live inside the personnel file, the inspector is now holding the personnel file, with the performance reviews and the salary history and the medical notes in it. Separating them is a filing decision that limits what an audit can reach, and you can only make it in advance. Where the rest belongs is covered in personnel files.
And make sure the access outlives the employment. A former employee needs a copy of a W-2. An inspector wants an I-9 for somebody who left last year. If your answer involves searching an email archive or a filing cabinet in the back, you do not have a document system, and the wider version of this problem is in HR document management.
Common Mistakes
The pattern is that the expensive mistakes are not on the forms with deadlines. Those get done, because a deadline is a prompt and a penalty is a teacher. The expensive mistakes are on the forms that nobody chases you for, in a system nobody owns, discovered years later by somebody who is not on your side.
Which suggests the useful question is not what forms do I need. It is: for each form on the list, who is doing it, and how would I know if they were not? Where the answer is my payroll provider, confirm that in writing rather than assuming. Where the answer is me, put it somewhere that will still be there in three years. And where the answer is nobody, you have just found the problem, and it is almost certainly on the collect side rather than the file side. The wider operational picture is in what is payroll.
Frequently Asked Questions
What are payroll forms?
Payroll forms are the documents required to hire an employee, pay them, and report those payments to the government. They fall into two groups that behave completely differently. The first group is forms you collect from the employee, such as the W-4, the I-9, and a direct deposit authorization, which are gathered once at hire and then held in your records. The second group is forms you file with the IRS or the Social Security Administration, such as Form 941, Form 940, and the W-2, which have deadlines and penalties. Nearly every payroll form belongs to one group or the other, and knowing which is the fastest way to understand what you owe and to whom.
What payroll forms do I need for a new employee?
Five, and one of them has a deadline measured in days. A Form W-4, which the employee completes and which drives federal income tax withholding. A Form I-9, verifying they are authorized to work in the United States, with Section 1 completed on the first day and Section 2 by the end of the third business day. A state withholding certificate, where the state has its own. A direct deposit authorization with their bank details. And a new hire report filed with the state, generally within 20 days of the start date, which is the one small employers most often miss entirely because nothing prompts them to do it.
What are the federal payroll tax forms?
The core set is short. Form 941 is the Employer's Quarterly Federal Tax Return, reporting federal income tax withheld plus both the employee and employer shares of Social Security and Medicare. Form 940 is the annual return for federal unemployment tax, which is an employer-only tax. The W-2 reports each employee's annual wages and withholding, and it goes to the Social Security Administration with a W-3 transmittal and to the employee. Form 944 is an annual substitute for the quarterly 941, but only for employers the IRS has specifically notified. Beyond those, Form 945 covers nonpayroll withholding and Form 943 covers agricultural employees.
What is the difference between Form 941 and Form 940?
They report different taxes on different schedules and confusing them is a standard new-employer mistake. Form 941 is quarterly and reports federal income tax withholding plus FICA, meaning Social Security and Medicare, which both you and the employee pay. Form 940 is annual and reports federal unemployment tax, which is paid entirely by the employer and never withheld from anybody. They do not overlap: the taxes on the 941 are not on the 940 and the reverse. Both involve payroll, both go to the IRS, and that is the extent of what they have in common.
When is Form 941 due?
By the last day of the month following the end of each quarter, which normally means April 30, July 31, October 31, and January 31. But two of those dates moved for the 2026 tax year, because the usual deadline landed on a weekend. The Q3 return, normally due October 31, is due November 2, 2026, because October 31 is a Saturday. The Q4 return, normally due January 31, is due February 1, 2027, because January 31 is a Sunday. An employer working from a saved calendar from a prior year misses both of those shifts.
What is the 10-day extension on Form 941?
If you deposited every one of the quarter's taxes on time and in full, the IRS gives you an automatic ten additional calendar days to file the return itself. You do not have to request it. The important limits: it extends only the filing deadline, not the deposit deadlines, and it does not apply at all if any single deposit during the quarter was late. So it is not a general grace period. It is a reward for a clean deposit record, and if your deposit record was not clean, the original date is the date.
What is Form 944 and can I choose to file it?
Form 944 is an annual substitute for the quarterly Form 941, designed for the smallest employers, meaning those whose annual liability for Social Security, Medicare, and withheld federal income tax is $1,000 or less. The critical point is that you cannot simply decide to file it. The IRS must notify you in writing that you are a Form 944 filer, and until you receive that written notice you keep filing whatever the IRS last told you to file. You can request the change by contacting the IRS within a defined window, but you must wait for written confirmation before switching.
How long do I have to keep payroll forms?
It depends on the form and the periods do not line up neatly. Payroll records generally need to be kept for at least three years under federal law. Form W-4 should be kept for four years. And Form I-9 runs on its own rule that is unlike any of the others: three years after the date of hire, or one year after employment ends, whichever is later. That means the retention period for an I-9 cannot even be calculated until the person leaves, and it is a comparison rather than a single number, which is why employers routinely get it wrong in both directions.
When is the I-9 due?
Section 1, which the employee completes, is due no later than their first day of work. Section 2, which you complete after examining their documents, is due by the end of the third business day after they start. Those deadlines do not extend, and there is no grace period built into them. The I-9 is the payroll form with the shortest fuse and the least visibility, because nobody sends you a reminder and nothing breaks if you miss it. You find out that it matters during an audit, at which point the paperwork violation stands on its own regardless of whether the employee was in fact authorized to work.
Do I need a W-9 for my employees?
No, and this confusion is worth clearing up because it points at a much more serious question. A W-9 is for contractors, not employees. An employee completes a W-4, you withhold taxes from their pay, and at year end you issue a W-2. A contractor completes a W-9, you withhold nothing, and at year end you issue a Form 1099-NEC. If you are collecting a W-9 from someone you treat as an employee, one of the two is wrong, and the question of which is a worker classification question with real financial consequences attached to getting it wrong.
What is the new hire reporting form?
It is a report to your state, not to the IRS, telling them that you have hired someone. The deadline is generally within 20 days of the start date, though some states are shorter. The system exists primarily to enforce child support orders, which is why it is administered at the state level and why it has nothing to do with your tax filings. It is the most commonly missed payroll form at small businesses, for a simple structural reason: it does not appear on any IRS calendar, your payroll provider may not do it for you, and nothing at all happens to prompt you.
Which payroll forms do I file and which does my payroll provider file?
Ask them directly, because the answer varies by provider and the assumption is expensive. A full-service payroll provider typically files the 941, the 940, and the W-2s, and makes the tax deposits. A cheaper product may calculate the numbers and leave the filing to you, which is a materially different service and is easy to buy by accident. What almost no payroll provider does is collect the I-9 or file your state new hire report. So the practical position for most small businesses is that the tax filings are handled and the employee-facing forms are not, and the second half is the half nobody is watching.
What happens if I miss a payroll tax form deadline?
Penalties, and they escalate. Late filing of Form 941 generally triggers a penalty of a percentage of the unpaid tax for each month it is late, up to a cap. Late deposits carry their own separate penalty, tiered by how late the deposit was. Those are two different penalties for two different failures and both can apply to the same quarter. The more serious exposure is the Trust Fund Recovery Penalty: withheld employee taxes are trust fund money, and the IRS can pursue the individuals responsible for them personally, which means an LLC or a corporation does not necessarily stand between you and that liability.
What is Form W-3?
It is the transmittal form that accompanies your W-2s to the Social Security Administration. It summarizes the totals from all the individual W-2s you are submitting, and it is due at the same time, by January 31. If you file electronically, which most small employers now do, the W-3 is generated as part of the submission rather than being a document you fill in separately. It exists so that the SSA can reconcile the sum of the individual forms against a single reported total, and a mismatch between them is one of the things that generates a notice.
Do I need to file payroll forms if I had no employees this quarter?
Generally yes, and this one catches people. If you have an active EIN and a filing requirement, you must continue to file Form 941 each quarter and report zero wages, rather than simply not filing. The exceptions are narrow: you have filed a final return telling the IRS you are done, or you have been approved as a seasonal employer and notified the IRS in advance. Silence is not an acceptable substitute for a zero return, and an unfiled quarter looks the same to the IRS as a missing one regardless of the fact that you owed nothing.
What is Schedule B and do I need it?
Schedule B is an attachment to Form 941 that reports your tax liability by the specific day wages were paid rather than as a quarterly total. You need it only if you are a semiweekly depositor, which is determined by your prior-period tax liability rather than by choice. If you are required to file it and you skip it, the IRS may average your liability across the quarter, which can generate a failure-to-deposit penalty on deposits that were in fact perfectly timed. So the penalty in that case arises from the missing schedule rather than from any actual deposit failure.
Where should I store completed payroll forms?
Somewhere you can produce them from within three business days, because that is the window you have if an I-9 inspection arrives. Federal guidance specifically recommends keeping I-9s separate from the general personnel file, and the reason is worth understanding: during an inspection, officials review the I-9s, and separating them means the inspector has no occasion to see performance reviews, medical information, or salary data. So the separation is not bureaucratic tidiness. It limits what an audit actually touches, and it is a five-minute filing decision that has consequences only when it is too late to make it.
Are payroll forms different in every state?
The federal ones are not, and the state layer on top of them varies enormously. Most states have their own withholding certificate, which is a separate form from the federal W-4, and their own quarterly reporting to their unemployment agency. Nine states have no personal income tax at all, which removes the state withholding form entirely but does not remove the unemployment obligation. The rule that binds you is a property of where the employee physically works rather than where you are incorporated, which means one remote hire across a state line adds a full set of registrations and forms you have never seen.
Can payroll forms be signed electronically?
The tax forms, generally yes, and e-filing is now the norm for the 941, the 940, and the W-2s. The I-9 is more particular: electronic completion and storage are permitted, but the system has to meet specific federal standards for integrity, accuracy, and audit trail, and the plain fillable PDF that USCIS publishes does not meet those standards, which means a form completed in it has to be printed and signed by hand. So the answer for the I-9 is that electronic is allowed but only through a system built for it, and using an ordinary PDF and a typed signature is not compliance.
What is the first payroll form I need as a new employer?
Form SS-4, the application for an Employer Identification Number, and it comes before everything else because nothing can proceed without an EIN. You cannot file a 941, make a tax deposit, or issue a W-2 without one. After the EIN, register for state withholding and unemployment accounts in every state where an employee will actually work. Only then do you get to the employee-facing forms. The sequencing matters more than it looks: employers who hire first and register afterwards find that the paperwork they now owe cannot be filed, because the account it belongs to does not exist yet.