HR Compliance Calendar: Deadlines for Small Employers
A month-by-month HR compliance calendar for small businesses, with the deadlines that apply at your headcount and a downloadable spreadsheet you can edit.
HR Compliance Calendar
Every recurring deadline, filtered by headcount, for a business with no HR department
The first compliance deadline I missed was a state new hire report. It was worth twenty-five dollars in penalty, which is not the point. The point is that I did not know the obligation existed until months later, and there was no reason I would have. Nobody sends you a list of what you now owe when you hire your fourth person.
That is the actual problem a compliance calendar solves. Not remembering deadlines you already know about, which most people manage. Knowing which deadlines exist for a business your size, in the states where your people actually work, before the date rather than after it.
Below is a working calendar you can download and edit, followed by an explanation of which parts apply to you. It is built for a business with 5 to 50 employees and no HR department, which means several things on the standard published calendars have been marked by headcount so you can ignore what you have not triggered.
The Calendar
Three sheets: the annual calendar month by month, a headcount filter showing which obligations you have actually triggered, and the recurring tasks that do not sit on a fixed date. Download it, delete the rows that do not apply to you, and fill in the owner column.
| A | B | C | D | E | F | G | |
|---|---|---|---|---|---|---|---|
| 1 | Month | Deadline | Applies To | Typical Date | Owner | Done | Notes |
| 2 | January | Form W-2 furnished to employees and filed with SSA | All employers with employees | Jan 31, next business day if weekend | |||
| 3 | January | Form 1099-NEC furnished and filed for contractors | Anyone paying contractors above the threshold | Jan 31, next business day if weekend | |||
| 4 | January | Form 941 for Q4 of the prior year | All employers with payroll | Jan 31, next business day if weekend | |||
| 5 | January | Form 940 annual federal unemployment return | Most employers with employees | Jan 31, later if deposits were timely | |||
| 6 | January | OSHA Form 300A completed and certified by an executive | 10 or more employees, non-exempt industries | By Jan 31 | |||
| 7 | February | OSHA Form 300A posted at every establishment | 10 or more employees, non-exempt industries | Feb 1 through Apr 30 | |||
| 8 | February | State unemployment tax filings for Q4 | All employers with payroll | Varies by state, often Jan or Feb | |||
| 9 | March | OSHA electronic submission via Injury Tracking Application | 20 to 249 in high-hazard industries, and 250 or more | By Mar 2 | |||
| 10 | March | ACA Forms 1095-C furnished to employees | Applicable large employers, 50 or more FTEs | By Mar 2 | |||
| 11 | March | CMS creditable coverage online disclosure | Employers offering prescription drug coverage | Within 60 days of plan year start | |||
| 12 | March | ACA Forms 1094-C and 1095-C e-filed with the IRS | Applicable large employers, 50 or more FTEs | By Mar 31 | |||
| 13 | April | Form 941 for Q1 | All employers with payroll | By Apr 30 | |||
| 14 | April | OSHA Form 300A posting period ends | 10 or more employees, non-exempt industries | Apr 30 | |||
| 15 | April | Suggested: annual I-9 audit while the calendar is quiet | All employers | Any time in Q2 |
Two notes before you use it. Several federal deadlines move to the next business day when they fall on a weekend, so verify the exact date each January against the agency rather than assuming last year's date. And this calendar covers federal obligations only. The state layer is added in the second sheet and discussed further down, and for most small businesses it is the larger half.
What an HR Compliance Calendar Is
Worth distinguishing from adjacent things. A payroll calendar covers pay dates and deposit schedules. A tax calendar covers filings. An HR compliance calendar includes both of those and adds the employment-specific obligations that sit outside finance entirely: safety postings, benefits notices, I-9 reverification, handbook distribution, and the state-level rules that change every January.
The term compliance calendar on its own is used across several fields that have nothing to do with employment. Financial services firms, environmental and safety teams, and corporate registered agents all maintain calendars by that name covering entirely different obligations. This guide is specifically the HR and employment version.
The authoritative sources for the dates themselves are the agencies that set them. The IRS employment tax due dates page covers payroll filings and information returns, and OSHA publishes the recordkeeping and submission deadlines. Check both each January, since several dates shift when they land on a weekend.
Which Deadlines Apply at Your Headcount
This is the section most published calendars skip, and it is the one that makes the difference between a useful document and an intimidating list of things that mostly are not yours. Employment obligations switch on at defined headcounts.
Two counting notes. Part-time employees generally count toward these thresholds, so a business with eight full-time and six part-time staff is usually at fourteen rather than eight. And several thresholds look at the count across a period rather than on a single day, which means a seasonal peak can bring you into coverage for a whole year. The human resource laws guide covers what begins at each count in more detail.
The Year, Quarter by Quarter
The compliance year is not evenly distributed. Understanding the shape of it lets you plan the work rather than react to it.
The practical implication is that Q2 is when you do voluntary compliance work. The handbook review, the I-9 audit, the contractor classification check, and the exempt status review all belong in April through June, because that is the only stretch of the year with genuine slack. Attempting any of them in January guarantees they do not happen.
The Deadlines Most Often Missed
These are not the obvious ones. Nobody forgets payroll. The ones that get missed sit outside the rhythms a small business already runs on.
The pattern across all six: they are annual or event-triggered rather than monthly, and nothing in the normal operating rhythm surfaces them. Payroll happens every two weeks so it self-corrects. A notice due once a year before October 15 has no mechanism at all except a calendar entry somebody made deliberately.
The I-9 case is worth singling out because it is the one with the shortest fuse. Section 2 must be completed within three business days of the start date, which means a hire on a Monday leaves you until Thursday. The I-9 documentation guide covers the requirements, and the new hire paperwork guide covers everything else due in the first week.
Building Your Own in an Hour
The downloadable calendar above is a starting point rather than a finished artifact, because the state layer and the ownership assignments are specific to you. An hour of work makes it yours.
Resist making it more elaborate than this. A spreadsheet with a date, an obligation, and an owner, reviewed quarterly, outperforms a sophisticated system nobody updates. The failure mode for compliance calendars is not insufficient detail; it is abandonment.
The State and Local Layer
Federal deadlines are stable. They move by a day or two when a date falls on a weekend and otherwise stay put for years. State obligations do not behave that way, and for a small business the state layer is usually both larger and more volatile.
For businesses with employees in more than one state, the multi-state payroll guide covers the registration mechanics, and our compliance hub has state-by-state requirements.
Paid sick leave deserves separate attention because it is the state obligation that changes most often and the one most likely to apply at any headcount. The PTO laws by state guide covers the leave landscape and which states impose requirements.
What Happens When You Cross a Threshold
Growth changes your compliance obligations, and it does so silently. Nothing notifies a business that it has become subject to FMLA. This is why the calendar needs a headcount check rather than only dates.
| Crossing | What Switches On | What to Do in the First Month |
|---|---|---|
| 10 employees | OSHA injury and illness recordkeeping, unless your industry is partially exempt | Start the 300 log, and diarise the January certification and February posting |
| 15 employees | Title VII, the ADA, and the Pregnant Workers Fairness Act | Review the anti-discrimination policy, brief managers on accommodation requests, update the handbook |
| 20 employees | COBRA continuation coverage and the Age Discrimination in Employment Act | Confirm your benefits administrator handles COBRA notices, and check who is responsible |
| 50 employees | FMLA, and the ACA employer mandate for applicable large employers | The largest single jump. Post the FMLA notice, write the leave policy, and confirm ACA tracking is in place |
| 100 employees | EEO-1 Component 1 reporting for most employers | Confirm the reporting window and that demographic data is being captured correctly |
The fifty-employee transition deserves particular attention because both obligations it triggers are substantial and both have preparation requirements that precede any filing date. ACA applicable large employer status is determined by the prior year's average, which means you can become an ALE based on a headcount you no longer have. Check the calculation rather than your current count.
The fifteen-employee transition is quieter and arrives sooner. It brings anti-discrimination obligations that have no filing date attached, which is precisely why they are missed: nothing is due, so nothing prompts you. The Pregnant Workers Fairness Act guide and the ADA guide cover what actually changes at that point.
What Missing a Deadline Costs
Penalties vary widely by obligation and most scale with delay, which makes a late filing considerably cheaper than an ignored one.
| Obligation | Typical Penalty Structure | The Multiplier |
|---|---|---|
| Payroll tax deposits | A percentage of the deposit, increasing with how late it is | Applies per deposit, so a systemic error repeats every pay period |
| W-2 and 1099-NEC filing | A per-form penalty that increases the longer it is outstanding | Multiplied by every employee or contractor, not charged once |
| Form 5500 | A substantial daily penalty from the Department of Labor | Accumulates daily until filed, which is why late filings escalate fast |
| ACA reporting | A per-return penalty for failure to file and a separate one for failure to furnish | Charged on both sides, so a single failure can be counted twice |
| OSHA recordkeeping | A per-violation citation, higher for repeat or wilful violations | Assessed per establishment where multiple locations are involved |
| State new hire reporting | Usually a modest per-employee penalty, higher where conduct is intentional | Small individually, and it applies to every unreported hire |
The consistent pattern worth internalising: almost none of these are charged once. They are charged per form, per employee, per deposit, or per day. A process error affecting every employee produces a penalty affecting every employee, which is why a small business can accumulate a meaningful number from a single oversight. Voluntary correction programmes exist for several of these and generally cost far less than being found, which is an argument for auditing rather than hoping.
Keeping It Current
A compliance calendar built once and never revisited becomes wrong in about a year. Three things change it: your headcount, the states where you have people, and the law itself.
Use primary sources for verification. The IRS, the Department of Labor, and OSHA publish the authoritative dates, and each state labor department publishes its own. Vendor calendars, including the one on this page, are useful for orientation and should not be your source of record for a filing date. The HR audit guide covers building a broader review cadence.
The part that does not scale by hand is the event-triggered work: I-9 reverification dates, new hire reporting within days of a start date, and threshold changes as headcount moves. FirstHR handles that side by tying deadlines to the employee record, so the reminders arrive because someone was hired rather than because someone remembered to create a calendar entry.
Frequently Asked Questions
What is an HR compliance calendar?
An HR compliance calendar is a schedule of every recurring employment-related deadline a business must meet across a year, with an owner assigned to each one. It typically covers payroll tax filings, information returns such as W-2 and 1099-NEC, benefits filings including Form 5500 and ACA reporting, safety recordkeeping such as the OSHA 300A posting, and recurring reviews like handbook updates and I-9 audits. Its purpose is to turn obligations that arrive at unpredictable moments into scheduled work that someone is responsible for.
Which HR compliance deadlines apply to a small business?
Some apply at any headcount: payroll tax deposits and Form 941, W-2 and 1099-NEC issuance in January, Form I-9 for every hire, state new hire reporting, and in many states paid sick leave accrual. Others begin at thresholds. OSHA recordkeeping generally starts at 10 employees. Title VII, the ADA, and the Pregnant Workers Fairness Act start at 15. COBRA and age discrimination protections start at 20. FMLA and the ACA employer mandate start at 50. Your headcount determines which parts of any published calendar are actually yours.
When are W-2 and 1099 forms due?
Both are generally due January 31, both to the recipient and to the agency, with the deadline moving to the next business day when January 31 falls on a weekend. W-2 forms go to employees and to the Social Security Administration; 1099-NEC forms go to contractors and to the IRS. Businesses filing ten or more information returns in total must file electronically. Confirm the exact date each year against the IRS, because the weekend shift changes it in some years and not others.
When does the OSHA 300A have to be posted?
The Form 300A summarising the previous calendar year must be completed and certified by a company executive by January 31, then posted in a conspicuous location at each establishment from February 1 through April 30. This applies to employers with 10 or more employees in non-exempt industries, and it applies even in a year with zero recordable injuries. Establishments required to report electronically must also submit through OSHA's Injury Tracking Application by March 2. Employers with fewer than 10 employees are partially exempt from routine recordkeeping.
What are the ACA reporting deadlines?
For applicable large employers with 50 or more full-time equivalent employees, Forms 1095-C must be furnished to employees by March 2, reflecting a permanent 30-day extension from the original January 31 date, and Forms 1094-C and 1095-C must be electronically filed with the IRS by March 31. Employers may now alternatively post a clear notice that forms are available on request rather than furnishing automatically. Businesses under 50 full-time equivalents are not applicable large employers and this does not apply to them.
Do I need a compliance calendar if I only have ten employees?
Yes, and arguably more than a larger business does, because at ten employees there is nobody whose job it is to remember. The calendar is shorter than a large company's, since several obligations have not been triggered yet, but the ones that apply at any headcount are the ones with per-employee penalties: payroll deposits, W-2 and 1099 issuance, I-9 completion, and state new hire reporting. An hour spent building the calendar once replaces the risk of discovering an obligation after the deadline.
How do I keep an HR compliance calendar up to date?
Two habits cover most of it. First, review quarterly for changes in every state where you have an employee, because state employment law changes far more often than federal law. Second, recheck your headcount monthly against the compliance thresholds, since crossing 15 or 50 employees triggers several obligations at once and nothing announces it. Beyond that, verify the specific dates each January against the IRS, DOL, and OSHA websites, since weekend shifts move several deadlines by a day or two each year.
What happens if I miss an HR compliance deadline?
It depends on the obligation. Late payroll tax deposits carry penalties that increase with how late they are. Late or missing information returns such as W-2 and 1099-NEC carry per-form penalties that scale with the delay. Form 5500 late filings carry substantial daily penalties from the Department of Labor. ACA reporting failures carry per-return penalties. Beyond the direct cost, most of these failures apply to every employee at once rather than to one, so a single oversight multiplies across your headcount.
Should a compliance calendar include state deadlines?
Yes, and for many small businesses the state layer is larger than the federal one. State unemployment tax filings, new hire reporting, paid sick leave accrual and carryover, minimum wage changes, and posting requirements all vary by state and change frequently. If you have employees in more than one state, each state adds its own set. Build the federal calendar first because it is stable, then add a state section for each state where someone actually works.
Who should own the compliance calendar at a small business?
One named person, usually the owner or the office manager, with each individual deadline assigned to whoever will actually do the work. Splitting ownership across several people without naming one coordinator is how deadlines fall between roles. Where an external accountant or payroll provider handles specific filings, write their name against those lines rather than leaving them blank, because assuming somebody else has it is the most common failure mode at this scale.