Track both ACA deadlines — furnish and file

1. What is ACA employer reporting?

Under the Affordable Care Act's employer-shared-responsibility rules, an Applicable Large Employer has to report whether it offered health coverage to its full-time employees, and what kind. That reporting takes two forms. Form 1095-C is a per-employee statement, one for each full-time employee, describing month by month what was offered to that person and on what terms. Form 1094-C is the transmittal that goes on top of the pile when the whole set is sent to the IRS. Employers that are not ALEs but sponsor a self-insured or level-funded plan report the same kind of information on Forms 1094-B and 1095-B, on the same calendar.

What makes ACA employer reporting worth holding as dates rather than filing away as an annual task is that three things about it behave unlike the rest of a compliance calendar. The return is evidence in a determination about something else entirely. Two of its deadlines are not yours to schedule — other people start them. And whether you are covered at all is the output of a calculation, not a headcount anybody in the business would recognize. Remindax helps you hold the furnishing date, the IRS filing date, and an annual ALE-status check, per entity — it doesn't prepare, code, or file 1094-C or 1095-C forms, hold coverage or enrollment data, determine anyone's full-time status, or advise on tax or benefits.

Because the ACA filing deadline lands on the same people already carrying employment records, wage filings, and workforce reporting, it belongs in the same register as the rest of them — which is what HR compliance tracking is for, and why ACA reporting tends to sit beside an employer's other annual filings rather than in a folder of its own.

1.1 The two acts, and what each one starts

Furnishing and filing are often described as two halves of one job, which is true administratively and misleading in every other respect. The two deliveries carry near-identical information to two recipients with completely different powers over it:

• →The 1095-C you furnish goes to a person who can answer back. An employee uses it to understand what they were offered and when. If it says they were offered affordable coverage in a month they believe they weren't, they can raise it with you — and a correction at that stage is a conversation, not a case. This is the only recipient in the whole arrangement who might tell you something is wrong while it is still cheap to fix.
• →The set you file goes to a system that will compare it against other people's returns. The IRS does not read a 1095-C on its own merits. It reads it next to the individual income tax returns of the employees named on it, looking for full-time employees who claimed the premium tax credit. That comparison is the whole mechanism, and it is not one the employer participates in or sees.
• →Doing the second does not accomplish the first, and vice versa. They are separately required, separately dated, and separately penalized — there are distinct penalty provisions for failing to file a correct return and for failing to provide a correct statement to the person it concerns, so one lapse in the underlying data can be charged twice over.
• →You may be able to replace the furnishing with a notice — but not with silence. Under the alternative manner of furnishing, an employer that posts a clear and conspicuous notice on its website telling individuals they may request a copy is treated as having furnished on time. The obligation doesn't disappear; it converts into a standing promise to produce the form on request.

Reporting requirements, deadlines, and penalty amounts are set by the IRS and change from year to year. Confirm what applies to your organization at the official sources in section 11. This is general information, not tax, benefits, or legal advice.

2. When are ACA 1095-C forms due?

Two lines in that box are worth more attention than they usually get. The first is the notice of availability, which is generally presented as a simplification — and it is, in the sense that an employer no longer has to physically produce and send thousands of statements. But look at what it converts the obligation into. A furnishing deadline is a date: you act, it is done, and nothing about it can reopen. A posted notice is a commitment held open for more than seven months, during which any individual entitled to a statement can ask for one and start a thirty-day clock that did not exist a moment earlier. The employer does not choose when that happens, does not know in advance whether it will happen at all, and cannot tell from any calendar whether one is currently running.

The second is the electronic filing threshold, which trips up small ALEs in a way the number alone hides. Ten returns sounds like a rule about ACA reporting, and it is not — it is a rule about information returns generally, applied in aggregate. An employer with a handful of full-time employees may be filing well under ten 1095-Cs and still be firmly over the line once its Forms W-2 and 1099 are counted alongside them. The practical effect is that almost every ALE files electronically, and that the paper deadline in late February is a date most employers will never use but many still have written down.

The four weeks between the two dates are the part employers most often lose. It is tempting to treat furnishing as a milestone on the way to filing — produce the statements, send them out, then transmit the same data to the IRS at the end of the month. In practice that gap is where employee questions arrive, and an employee question in the first week of March is a gift: it is the last opportunity to correct a code before the same code goes to the IRS as part of a permanent record and is compared against that employee's own return. Employers who plan the month as a single continuous task tend to file the corrected version. Employers who treat the ACA filing deadline as the only real date tend to file the original one and hear about it much later.

3. Why tracking the ACA reporting deadline matters

Two fixed dates a month apart, on the same calendar every year, sounds like one of the easier things to hold. Four properties combine to make it one of the harder ones:

The first two points are the same fact seen from opposite ends, and together they describe something no other annual filing on this site does. Consider what filing normally accomplishes. You send an annual report to a state and your entity stays in good standing. You post an injury summary and the obligation is discharged. You submit an inventory and the year is closed out. In each case the act of filing is the thing that makes you safe, and the risk lives entirely in not doing it.

ACA reporting splits that in two. Filing on time does protect you — from the information-return penalties, which are real and multiply quickly. But the same filing is the input to a completely separate determination about whether you offered adequate coverage, and a perfectly executed, punctually delivered, entirely accurate set of returns is exactly what allows that determination to be made. An employer who files flawlessly and offered coverage that did not meet the affordability test has done everything right on this page and may still receive a substantial proposed assessment. The paperwork was never the exposure. It was the disclosure.

Which is why the second point is more than a technicality. Under the limitations rule for these assessments, the six-year period begins on the due date of the reporting return — or, if it is later, the day the return was actually filed. Read that the way a non-filer would. An employer who quietly skipped a year is not sitting on a liability that is slowly ageing out. They are sitting on one where the six years have not started, and will not start, until they file. The instinct that says a difficult year is best left alone produces precisely the opposite of what it intends: the years you filed are the years that will eventually close, and the year you didn't is the one that stays open indefinitely.

The third point is the one that resists a calendar entirely. Every other date discussed on this page is scheduled: March 2 and March 31 arrive whether or not anything happens, and they can be entered years in advance. The other two cannot be entered at all, because they are held by other parties. An employee who reads the notice on your careers page in August and asks for their statement has just created a thirty-day deadline for your HR team, and there was no way to know in advance that they would. A Letter 226-J proposing an employer-shared-responsibility payment can arrive at any point in a six-year period, addressed to whatever contact the IRS holds for you, and what it starts is a response period of at least ninety days — generous by IRS standards, and short by the standards of an organization that has to reconstruct a plan year, a set of offers, and a full-time determination for a period several staff changes ago.

This is a genuinely different tracking problem from the one on the OSHA 300A annual summary, which many of the same employers are producing in exactly the same weeks, and it is worth being precise about how. The 300A is one unchanging record delivered three ways, and the whole difficulty is in the delivery: each recipient gets the same content, none of them can start anything, and once all three deliveries are made the year is genuinely finished. ACA reporting looks superficially similar and behaves nothing like it. Here the recipients don't just receive — they act. One can query the document back at you, the other can open a case on the strength of it, and the year is not finished when the last delivery is made. It is finished six years after it, at the earliest.

The fourth point is deliberately the smallest, because the shape of it is already familiar. Employers who report to the EEOC will recognize the problem of a workforce number that can move without a hiring decision — EEO-1 reporting turns on a hundred-employee line drawn inside a pay period the employer nominates, and part-time staff count toward it. ALE status has the same character with an extra step: it isn't a count taken on a day at all, but an average of twelve monthly figures, in which employees who work fewer than thirty hours a week are converted into fractions and added together. A business can therefore become an ALE through a busy season, a temporary staffing arrangement, or a shift-pattern change, and can drop back out the following year without anyone experiencing either event as a change in the size of the company. What makes it worth an annual prompt rather than an annual assumption is the lag: the calculation describes the year just gone, and the obligation it creates lands the following spring.

4. Who needs to track the ACA filing deadline

Large employers with a dedicated benefits function generally have this in hand. The interesting list is everyone whose ACA reporting sits at the edge of somebody's job:

Applicable Large Employers

Fifty or more full-time employees including equivalents, so ALE reporting applies: two dates every spring plus an annual status calculation that decides whether next year has them too.

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HR, benefits & payroll teams

Where the ACA calendar sits next to the other first-quarter filings, and where the data comes from three systems that were never designed to reconcile with one another.

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Self-insured & level-funded employers

Reporting enrollment as well as offers, and — below the ALE line — doing it on Forms 1094-B and 1095-B, on the same dates, with none of the same visibility.

Aggregated employer groups

Where the status calculation combines related entities but the filing is done member by member — so a company well under fifty on its own can be an ALE because of who owns it.

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Employers near the fifty line

Seasonal, shift-based and part-time-heavy operations, where the equivalents move the average around and the answer has to be worked out rather than known.

Employers using an outside filer

A payroll provider or ACA vendor does the preparation and transmission — but the obligation, the penalties, and the letter that arrives four years later all still belong to the employer.

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The last one is the most common situation and the most misread. Delegating ACA reporting to a payroll provider genuinely removes the hardest part of the work — nobody should be hand-coding 1095-Cs who has an alternative — but it removes the labor rather than the liability. The provider files; the employer is the filer. The provider's engagement ends when the transmission is accepted; the employer's exposure runs for another six years. And when a 226-J does arrive, it arrives at the employer, referencing a plan year the current provider may not have handled. Keeping your own record of what was filed and when, independently of whoever pressed the button, is the small piece of administration that makes that letter answerable. For the wider view of every recurring obligation an employer carries, see compliance tracking software — tracking and reminders, not a GRC suite.

5. What happens when an ACA deadline is missed

ACA failures fall into two categories that operate on completely different timescales, and employers routinely prepare for the first while being exposed to the second.

The information-return penalties. These are the ordinary consequence of not furnishing 1095-Cs to employees on time, or not filing the 1094-C and 1095-Cs with the IRS by the due date. They are charged per return, and the current instructions put the figure at $340 for each failure with an annual cap in the low millions — amounts that are indexed and change, so the current year's instructions are the only reliable source. What makes the arithmetic uncomfortable is not the rate but the multiplier. The penalty scales with the size of your workforce rather than with the seriousness of the mistake, so a single systematic error affecting every statement produces the same exposure as deliberate refusal. And because furnishing and filing are separately required, one bad data set delivered to both recipients can attract both penalties. Incorrect returns are treated much like missing ones, and higher amounts apply where a failure is due to intentional disregard, while a waiver is available where the failure was due to reasonable cause and not willful neglect.

The employer-mandate assessment. This is the category that ambushes people, and it isn't a paperwork penalty at all. Section 4980H asks whether the employer offered minimum essential coverage to at least ninety-five percent of its full-time employees and their dependents, and whether that coverage was affordable and provided minimum value. Neither version of the payment is owed unless at least one full-time employee actually received the premium tax credit for Marketplace coverage — which is the detail that makes the whole thing so hard to anticipate. The trigger is not something the employer does. It is something an employee does, on their own tax return, months after the plan year ended, for reasons the employer never learns.

The IRS proposes that liability in a letter. Letter 226-J sets out a computed amount based on the employer's own 1094-C and 1095-C alongside the individual returns of the employees named on them, and the employer responds on a form supplied with it, agreeing or disagreeing and explaining why. Employers now have at least ninety days from that first letter to respond before the IRS takes further action — a protection that exists precisely because these letters arrive so far outside the reporting rhythm that assembling an answer takes real time. Ninety days is ample for an organization that kept its filing confirmations, its plan documents, and its full-time determinations for the year in question. It is not ample for one starting from a shared drive and a former colleague's memory.

And there is a third failure that belongs to neither category, because nothing about it looks like a missed deadline at the time. An employer that adopted the notice of availability instead of sending statements has undertaken to furnish a copy on request through to the middle of October. Somewhere in that period, an employee — often a former employee, dealing with their own tax filing — sends the request to an address on a web page that nobody has been assigned to watch. The thirty days run from the request, not from the day somebody notices it. This is the quietest way to convert a compliant employer into a non-compliant one, and it happens in the summer, six months after anyone last thought about ACA reporting.

Underneath all three sits the status question. An employer that never worked out it had crossed the fifty-equivalent line hasn't missed one year of ACA employer reporting — it has missed every year it was over, with the furnishing and filing failures compounding annually and the employer-mandate exposure for each of those years still entirely open, because the period that would eventually close them never began. Comparable in structure to the annual return an exempt organization owes the IRS, where a run of quiet years produces a single loud discovery — though there the consequence lands by operation of law on a fixed count, and here it waits, indefinitely, for someone to look.

6. How Remindax keeps you ahead of both deadlines

Two of the four dates on this page can be scheduled years ahead, and the other two can't be scheduled at all — so the useful system is one that holds the first pair reliably and leaves the second pair answerable. Four pieces address that:

7. Why spreadsheets fail for ACA reporting

The characteristic ACA spreadsheet has one row per year and one cell that eventually reads done. It fails first by collapsing two obligations into one. Furnishing and filing are four weeks and one recipient apart, and a single status cell cannot distinguish an employer who sent the employee statements and has not yet transmitted anything from one who has completed both. That is not a hypothetical gap: the four weeks between the dates are exactly when a tracker gets marked finished, because the visible, effortful, employee-facing part of the job is over.

It fails second by having no way to represent a deadline that hasn't started. A request for a statement, or a letter proposing an assessment, creates a real and short obligation on a date nobody could enter in advance. A row-per-year file has nowhere to put that, so the response period lives in whoever's inbox received it — which is a fragile arrangement for a thirty-day clock and an untenable one for a ninety-day response to a letter about a plan year four staff changes ago.

Its third failure is the one that shows up years later. Because the file records outcomes rather than events, it tends not to preserve when anything happened — and the filing date is the fact that determines when a year's employer-mandate exposure finally closes. An organization that can produce a transmission confirmation with a date on it is in a different position from one that can produce a cell containing the word yes. The first can bound its own exposure; the second is relying on institutional memory to answer a question the IRS is asking in writing.

And it invites the wrong thing to be stored. Because the hard part of the work is per-employee, an ACA tracker tends to grow columns for employees, offer codes, contribution amounts, and enrollment — until a file that began as a deadline list is holding health-coverage information about named individuals, sitting in a shared drive with no particular access control. The tracking layer has no business holding any of it. It needs to know that two obligations fall due on two dates and whether each has been met; the substance belongs wherever the employer's benefits and payroll records already live.

An automated register keeps furnish and file as separate items with separate reminders, raises the ALE-status question every autumn whether or not anyone remembers it, and preserves the filing date for each year against the day somebody has to answer for it — which is the only version of this that survives an employer with more than one entity and more than one person involved.

8. Key takeaways

• ✓ALE reporting is two separate obligations each year: furnish 1095-Cs to employees by around March 2, and file the 1094-C with all 1095-Cs to the IRS by March 31 electronically — e-filing is required at ten or more information returns, counted across all form types.
• ✓The March 2 furnishing date already includes the automatic 30-day extension, so there is no further extension to apply for — and an employer may instead post a notice of availability, which converts a one-off delivery into an obligation held open into October.
• ✓Penalties come in two unrelated kinds: per-return information penalties that multiply by headcount, and a separate employer-mandate assessment under section 4980H that turns on the coverage you offered rather than on the paperwork.
• ✓The employer-mandate assessment is proposed by Letter 226-J, carries a response period of at least 90 days, and can be assessed within a six-year period — a period that begins on the filing due date or the date you actually filed, whichever is later.
• ✓Filing does not end the year's exposure, but it does start the clock that eventually will — so tracking both dates, the annual ALE check, and the date each year was filed is what keeps an employer ahead of the immediate penalty and the delayed one.