Why a Single $100,000 Day Overrides an Employer’s Federal Payroll Tax Deposit Schedule

Employers that withhold income tax and payroll taxes from workers generally must send those amounts to the federal government on a fixed timetable. The employer does not pick that timetable. A monthly or semiweekly deposit schedule is set by the employment tax the business reported over a lookback period, which is 12 months for quarterly filers.

IRS guidance covers employers that report on Form 941 each quarter and those that report on Form 944 each year. Those taxes include withheld federal income tax and the employer and employee shares of Social Security and Medicare tax. For Form 941 filers, the 2027 window runs from July 1, 2025 through June 30, 2026. A separate threshold of $100,000 in accumulated taxes requires a deposit by the next business day, whatever schedule the employer holds. The 2027 dates come from Beancount.io, and the IRS publication for 2026 uses the same July-to-June pattern.

The Lookback Window That Sets the Schedule

IRS Topic 757 defines the lookback period for Form 941 filers as a 12-month window that starts July 1 of the second preceding year and ends June 30 of the prior year. The taxes reported in that window determine the deposit schedule for the following calendar year.

Topic 757 says the schedule depends on prior reported taxes, not on how often the employer pays its employees, and that deposit timing follows when wages are paid rather than when liabilities accrue.

Beancount.io gives the 2027 window as July 1, 2025 through June 30, 2026. That covers the third and fourth quarters of 2025 and the first and second quarters of 2026. The same source says the lookback total is built from the original Forms 941 for those quarters, and that amended Forms 941 do not count toward it. Publication 15 states the same July 1 to June 30 lookback for 2026, which is July 1, 2024 through June 30, 2025.

Employers that file Form 944 use a different base. Topic 757 says their lookback is the calendar year two years before the deposit year, which Beancount.io gives as calendar 2025 for 2027. Publication 15 gives calendar 2024 for 2026. Topic 757 says the Form 944 base applies to filers of that form, to employers that filed it in either of the two previous years, and to those filing it in the current year. Beancount.io says Form 944 generally applies to employers with annual employment tax liability under $1,000.

Monthly Deadline
Monthly depositors deposit by the 15th of the following month, so taxes on January payments are due February 15, according to IRS Topic 757. If that date falls on a weekend or D.C. legal holiday, the deadline moves to the next business day.

The $50,000 Line Between Monthly and Semiweekly

The dividing line is $50,000. Topic 757 says an employer that reported $50,000 or less in the lookback period is a monthly schedule depositor. An employer that reported more than $50,000 is a semiweekly depositor. Publication 15 sets the same threshold and ties it to the taxes reported on Form 941, line 12.

The schedule an employer receives is tied to the calendar year that follows the window. Beancount.io says the IRS notice that tells an employer which schedule applies for the coming year is Notice CP136. According to Beancount.io, the notice is not a balance due and not an audit, and nothing needs to be paid in response to it.

Monthly Deadlines and Semiweekly Paydays

Monthly depositors send taxes for payments made in a calendar month by the 15th of the following month. Taxes for January payments are due February 15. If the 15th falls on a Saturday, a Sunday or a D.C. legal holiday, the deadline moves to the next business day. Topic 757 says a statewide holiday that is not a D.C. legal holiday does not delay the due date.

Semiweekly depositors work from paydays rather than from the calendar. Paydays on a Wednesday, Thursday or Friday are due the following Wednesday. Paydays on a Saturday, Sunday, Monday or Tuesday are due the following Friday. Topic 757 says semiweekly depositors have at least 3 business days following the close of the semiweekly period to make a deposit.

When a deadline falls on a non-business day, a deposit made by the close of the next business day is timely. Publication 15 counts business days as all days except Saturdays, Sundays and legal holidays.

Publication 15 says employers must use EFT for all federal tax deposits. Topic 757 names the IRS business tax account, IRS Direct Pay for businesses and EFTPS as electronic options. To be on time, a deposit must be scheduled by 8 p.m. Eastern time the day before the due date. The Federal Tax Collection Service offers same-day payment for a missed cutoff, though your financial institution may charge a fee. A third party, such as a tax professional or payroll service, can make deposits, though it may charge fees and use different cutoffs.

How the $100,000 Next-Day Rule Overrides the Schedule

Regardless of its assigned schedule, an employer that accumulates taxes of $100,000 or more on any day during a deposit period must deposit by the next business day. Section 11 of Publication 15, the IRS employer’s tax guide for 2026, covers this under a heading titled $100,000 Next-Day Deposit Rule. It applies to monthly and semiweekly depositors alike.

The rule also changes the schedule itself. Publication 15 says a monthly depositor who accumulates $100,000 becomes a semiweekly depositor on the next day and remains one for at least the rest of that calendar year and the following calendar year. Topic 757 gives the same period: at least the remainder of the calendar year and the following calendar year.

The employer does not pick that timetable.

Quarterly Filers and the $2,500 Pay-With-Return Option

Form 941 filers may pay their tax with the quarterly return rather than making deposits when the total tax liability for the current or prior quarter is less than $2,500. The option is unavailable if the employer incurred a $100,000 next-day deposit obligation during the current quarter.

Topic 757 says Form 944 filers may pay with the return if the annual liability is under $2,500. If the fourth-quarter liability is under $2,500, they may pay that quarter with the return, provided the deposits for the first three quarters were made according to the applicable deposit rules.

Publication 15 advises that an employer unsure whether its liability will stay under $2,500 should follow the monthly or semiweekly deposit rules, to avoid the failure-to-deposit penalty. Topic 757 says an employer with a liability of $2,500 or more must deposit unless it is eligible to pay with its return.

First-Year Businesses and New Employers

Topic 757 says the lookback taxes for any quarter before a business started or was acquired are treated as zero. For Form 941 filers, a new employer therefore generally begins as a monthly schedule depositor for its first calendar year, unless the $100,000 rule applies.

The $100,000 next-day rule still applies in that first year. A new employer that accumulates $100,000 on a single day must deposit by the next business day. Its schedule for later years depends on the taxes it reported in its own lookback period.

Topic 757 says penalties can apply to late deposits, short deposits and payments mailed instead of deposited, and that the IRS may waive penalties in some cases.