Your payroll tax deposit schedule was decided before the year started, and one bonus can override it overnight

For 2 years I treated the payroll tax deposit schedule as somebody else's problem. The provider runs payroll, the provider makes the deposits, the founder signs nothing. That is true right up to the moment it goes wrong, and then the schedule turns out to belong to the company rather than to the provider. I was wrong about who owns it, and it was bad advice repeated to at least 4 founders.

The schedule is not chosen and it is not negotiated. It is assigned by a lookback at a period that closed before the year even started, and the instruction is blunt about the thing everybody assumes: your deposit schedule “isn't determined by how often you pay your employees or make deposits”. Wherever the cash ends up, the Bank Index list of US banks names the supervisor behind each one.

I went looking for the rule after watching a company get a penalty notice it could not explain. I read the deposit section of the employer guide end to end rather than the summary, all 14 pages of it, and it took most of an evening. What follows is how the schedule is set, the rule that overrides it overnight, and what lateness actually costs on a calendar.

The lookback decides, and it looked before you started

Two schedules exist and the line between them is 1 number. The guide puts it in a single sentence: “If you reported $50,000 or less of taxes for the lookback period, you're a monthly schedule depositor; if you reported more than $50,000, you're a semiweekly schedule depositor.”

The lookback period is 4 quarters, and the guide states the dates: it “begins July 1 and ends June 30”. So the schedule you are on for this calendar year was decided by returns filed for quarters that ended more than 6 months before the year began. A company that trebled its payroll in September finds out in January what it will be doing all year, based on a version of itself that no longer exists.

The guide is explicit that this is your homework: “Before the beginning of each calendar year, you must determine which of the two deposit schedules you're required to use.” I had assumed somebody would tell me. Nobody sends a letter about it in December.

The rule that overrides the schedule overnight

Here is the part that catches growing companies, and I had not registered it at all. Whatever schedule you are on, accumulating enough liability triggers what the guide calls a “$100,000 next-day deposit obligation”. Not next week, and not on your own usual date.

A single large bonus run, an option exercise with withholding attached, or a first month with a much larger team can produce that number without anybody expecting it. The company is monthly on Monday and owes a deposit tomorrow on Tuesday.

There is a small threshold in the other direction, and I use it more often than I expected to. If the total tax for the quarter is under 2,500 dollars and no next day obligation arose, the amount can be paid with the return instead of deposited. That covers a company with 1 part time employee. It covers almost nobody else at all.

What lateness costs, by the day

The penalty is a ladder rather than a flat charge, and the steps are short. Deposits made 1 to 5 days late cost 2 per cent, 6 to 15 days late costs 5 per cent, 16 days or more costs 10, and anything still unpaid more than 10 days after the first notice costs 15, which means the difference between noticing on Tuesday and noticing at the end of the month is a factor of 5 on the same underlying amount.

Two details in that table are worth more than the rates themselves, and I find the second of them the single most annoying line in the whole section. The first is the counting: “Late deposit penalty amounts are determined using calendar days, starting from the due date of the liability.” A Friday deadline missed over a long weekend is 3 days gone before anybody opens a laptop.

The second is the row about paying directly, which charges 10 per cent for “amounts that should have been deposited, but instead were paid directly to the IRS, or paid with your tax return”. The money arrived on time and in full, the amount was never late, and the penalty applies anyway because the method was wrong rather than the timing. The amount is not late. The method is wrong, and the method is what is being penalised.

Why the schedule feels arbitrary and is not

The design makes sense once you see what it is protecting. Employment taxes are mostly money withheld from employees, so the company is holding somebody else's money between payday and the deposit. The faster the schedule, the shorter that window.

That is why the threshold is a tax figure rather than a headcount or a revenue figure. A company withholding a large amount is holding a large amount, whatever its size or its margin, and the rules put it on a shorter leash for that reason alone.

It also explains the next day rule. At a certain accumulation the amount being held is large enough that a monthly window is uncomfortable for reasons that have nothing to do with your solvency, and the rule closes the window without waiting for the calendar.

I cannot tell you where the 2 specific numbers came from, and I have not found any published explanation of how they were chosen. What I can say is that the logic is coherent once you stop reading it as a size test, which is how I read it for 2 years.

What actually goes wrong, in the order I have seen it

The most common failure is a change nobody registered, and it happens at the quietest possible moment, in the first week of January, when the only thing anybody is thinking about payroll is whether the holiday run went out. The schedule flips at a year boundary, the provider is told about the new year and not about the new frequency, and 2 deposits go out on the old rhythm before anybody notices.

The second failure is a hand-off between providers. A company changes payroll providers mid year, and the deposit history that determines the schedule sits with the old one while the new one asks the founder a question they cannot answer.

The third failure is the bonus run itself. A single large payment lands, the accumulated liability crosses the line, and the next day obligation exists for exactly 1 day in the whole year, on a day when everybody is thinking about the bonus rather than about the withholding attached to it.

I do not know which of the 3 costs companies most across a year. All 3 produce the same notice, and the notice does not say which one happened.

What I would check this quarter

Find out which schedule you are on, in writing, from whoever runs payroll. Ask for the answer rather than the reassurance. A useful reply names monthly or semiweekly. A useless one says the whole thing is handled.

Then ask what happens on the day the accumulated liability crosses 100 thousand dollars, and whether the provider watches for it or waits to be told. That is the single question I would put first, since the schedule you are on does not protect you from that rule.

Then look at your own bonus and option calendar next to the deposit calendar. Those 2 documents live in different places and are read by different people, and the overlap between them is where the next day obligation appears.

Then keep the confirmations. Not the payroll reports, the deposit confirmations, because the penalty conversation is about dates of deposits rather than dates of payroll runs, and the 2 sets of dates are not the same.

None of this is tax advice and the provider's contract matters more than any general rule here. What a founder can usefully do is know the schedule and the trigger, because both are facts about your own company rather than opinions.

The part that is more forgiving than people expect

Penalties do not apply where a failure was “due to reasonable cause and not to willful neglect”, and the guide describes 2 specific mercies beyond that. A first quarter in which you were required to deposit at all can be waived if the failure was inadvertent. So can the first failure after your deposit frequency changed, which is precisely the moment when a growing company gets caught.

Those waivers come with size limits attached, and the limits tell you who the mercy was written for, because a company that has grown past them has usually also grown past the kind of accident they describe. A business net worth above 7 million dollars or more than 500 employees puts you outside them, which tells you who the mercy was written for.

I still would not plan around any of it. Reasonable cause is decided by somebody reading your explanation after the fact, and a company that can point to a written schedule and a documented trigger is having a very different conversation from one that cannot.

Questions we get

Five that arrive most often, with the short answers.

Monthly vs semiweekly depositor, how do I know which I am? By the total tax you reported over the lookback, not by anything about your payroll cycle. Above the line you are semiweekly, at or below it you are monthly, and the answer is fixed for the whole calendar year.

What exactly is the 941 lookback period? The 4 quarters running from 1 July to 30 June before the year in question. It closed before your year started, which is why the schedule can feel like it belongs to a different company.

Does the 100000 next day deposit rule override my schedule? It overrides it completely, on the day the threshold is crossed, whatever your usual rhythm is and whatever the provider has in its calendar, which is why this is the 1 question I would put to a payroll provider before any other. A monthly depositor owes a deposit on the next banking day.

How is a late payroll tax deposit penalty calculated? On a ladder counted in calendar days from the due date: 2 per cent for 1 to 5 days, 5 for 6 to 15, 10 beyond that, and 15 once a notice has been outstanding for 10 days.

Where do I find the form 941 deposit due dates for my schedule? In the employer guide rather than from a provider. Monthly deposits fall on the 15th of the month after. Semiweekly dates depend on which days of the week your payday falls in. That is the part worth reading twice, and it is the part providers get right and founders cannot check.

A short digression about whose name is on it

Payroll providers are good at this. The vast majority of deposits arrive on time, and the industry deserves more credit than a piece about penalties gives it, because the failure rate is low enough that most founders will go a decade without seeing a notice of any kind. The awkward part is the legal position underneath. It does not move when you outsource the work. The liability stays with the employer, so a provider error becomes your penalty notice and then your commercial argument with the provider. I find that gap harder to explain to founders than any of the arithmetic above. Anyway, back to the calendar.

What I could not establish

How common these penalties actually are. Aggregate penalty collections are published, and I have not found a breakdown that isolates employment tax deposit failures from everything else, so I cannot tell you whether this is a rare event or a routine one.

Whether providers watch the 100 thousand dollar trigger automatically. My guess is that the large ones do and that smaller bureaux vary. I asked 2 finance leads and got descriptions of process rather than a yes, which is usually what you get when nobody has tested it, and I suspect the honest position is that most companies never come close to the number.

The detail I keep thinking about is the shape of the ladder. The first step is 5 days wide and costs 2 per cent, and the last one costs 15, so the whole design is aimed at the company that notices quickly rather than the company that owes a lot. Nobody I asked will say why lateness is priced so much more steeply than size, and that pricing is the opposite of what a founder intuitively expects.