Missing a federal payroll deposit isn't just a fine — it's a compounding penalty plus trust-fund personal liability. Here's the lookback rule, the semi-weekly calendar, the monthly deadline, and the single-day $100,000 trigger.
The Deposit Due Date Is Not Flexible
For every paycheck you cut, a portion of the federal tax belongs to the government — not to your business. Federal income tax withheld from the employee, the employee's share of Social Security and Medicare, and the employer's matching share — all of it has to be deposited with the IRS on a defined schedule. The schedule isn't a suggestion. It's statutory.
Miss the deadline and the IRS assesses a Failure-to-Deposit penalty (IRC §6656) that scales with how late you are. Miss it long enough or consistently enough, and the IRS assesses the Trust Fund Recovery Penalty (IRC §6672) — which can hold the business owner, officer, or "responsible person" personally liable for 100% of the unpaid trust-fund taxes, with no protection from bankruptcy.
For most US small business owners, missing a federal payroll deposit is the single highest-consequence payroll mistake possible. This article lays out exactly what the rules are, how to never miss one, and what to do if you already have.
The Lookback Period: How the IRS Assigns Your Schedule
Every November, the IRS looks back at your 4 quarters ending June 30 of the current year — this is the "lookback period" — and sums up your total 941 tax liability (federal income tax withheld + Social Security + Medicare, both employee and employer sides).
- Lookback liability ≤ $50,000 → Monthly Depositor for the following calendar year
- Lookback liability > $50,000 → Semi-Weekly Depositor for the following calendar year
- Brand new employer with no lookback history → starts as Monthly Depositor
The IRS notifies you of your schedule in late November / early December. Your schedule applies for the entire next calendar year, with one exception — the single-day $100,000 rule covered below.
Why the Lookback Period Matters
Because the assignment happens once a year, you know your schedule in advance. What trips up businesses is growth: a company that was a monthly depositor last year may cross $50K in lookback liability and transition to semi-weekly for the new year — and their bookkeeper doesn't realize it until February's first semi-weekly deadline is missed.
The Monthly Deposit Rule
If you're a monthly depositor, taxes accumulated in one calendar month must be deposited by the 15th of the following month.
- January taxes → deposit by February 15
- February taxes → deposit by March 15
- ... and so on
If the 15th falls on a weekend or federal holiday, the deadline moves to the next business day.
This is the simplest schedule and the one most new employers start with.
The Semi-Weekly Deposit Rule
Semi-weekly is not twice a week. It's a payday-based schedule with two windows:
| Payday falls on... | Deposit due by... |
|---|---|
| Wednesday, Thursday, or Friday | The following Wednesday |
| Saturday, Sunday, Monday, or Tuesday | The following Friday |
This applies regardless of how often you run payroll. If you pay weekly on Fridays, every Friday's deposit is due the following Wednesday. If you pay bi-weekly on Wednesdays, every other Wednesday's deposit is due the following Wednesday. Weekends and holidays push the deadline to the next business day.
The Three-Day Rule (Tip-Heavy Businesses)
If you didn't accumulate at least $100,000 in tax liability on any one day, you have at least 3 business days after payday to make the deposit. For tip-reporting restaurants and service businesses, this can matter at quarter-end when tip allocations push daily liability higher than expected.
The $100,000 Single-Day Rule
If your tax liability reaches $100,000 or more on any single day, you must deposit the entire balance by the next business day — and you become a semi-weekly depositor immediately, for the rest of the current year and all of the following year.
This rule catches businesses growing fast or running quarterly bonus payrolls. A typical trigger scenario:
- Company has been a monthly depositor all year
- December bonuses run: $300,000 in bonus payments create $95,000 in federal tax liability on bonus day
- A supplemental regular payroll two days later pushes daily liability past $100,000
- Now: next-business-day deposit required, and monthly status flips to semi-weekly through end of next year
Missing the next-business-day deposit after crossing $100K is one of the fastest ways to accumulate 5-figure FTD penalties.
The Failure-to-Deposit Penalty Scale
Under IRC §6656, the FTD penalty is a tiered percentage of the late amount:
| Days late | Penalty |
|---|---|
| 1–5 calendar days | 2% |
| 6–15 calendar days | 5% |
| 16+ calendar days | 10% |
| Not paid within 10 days of IRS notice | 15% |
Note: the "calendar days" are from the deposit due date, not the payday. If payday was January 17 (Wednesday) and the deposit was due by January 24 (following Wednesday), and you deposited on January 26, that's 2 days late → 2% penalty.
A Real Example
Quarterly payroll liability: $180,000. Three monthly deposits of $60,000 each.
- Month 1 deposit: on time. Penalty: $0.
- Month 2 deposit: 4 days late. Penalty: 2% × $60,000 = $1,200.
- Month 3 deposit: 18 days late. Penalty: 10% × $60,000 = $6,000.
Quarterly penalty: $7,200 — plus interest compounded daily from each due date until paid.
Against the same $180,000 quarterly liability, a simple deposit discipline is the difference between $0 and $7,200.
The Trust Fund Recovery Penalty — The One That Doesn't Go Away
Federal payroll tax liability has two components:
- Trust fund taxes (employee withholding): federal income tax withheld from the employee, employee Social Security (6.2%), employee Medicare (1.45%). This money was taken from the employee and belongs to the government — the employer is just the custodian.
- Non-trust-fund taxes (employer portion): employer Social Security (6.2%), employer Medicare (1.45%), FUTA.
When a business fails to remit trust-fund taxes, IRC §6672 lets the IRS assess a 100% penalty against any "responsible person" — typically the owner, officer, bookkeeper, controller, or CFO — personally.
Unlike most tax obligations, the Trust Fund Recovery Penalty:
- Survives bankruptcy. Personal bankruptcy does not discharge it.
- Can be assessed against multiple people. All responsible persons can be held jointly and severally liable.
- Has a 3-year statute for IRS assessment (5 years in some circumstances), but once assessed, the collection statute is 10 years.
- Can pierce LLC and corporate protection. The entity's limited liability does not shield responsible persons from §6672.
A business that falls behind on federal payroll deposits for six months can face the dissolution of the business AND a personal IRS lien against the owner's assets. This is the scenario every payroll compliance system is designed to prevent.
EFTPS: The Only Way to Deposit
The Electronic Federal Tax Payment System (EFTPS) is the required mechanism for all federal payroll tax deposits. There is no paper-based alternative anymore — paper Form 8109 coupons were discontinued in 2011.
EFTPS enrollment:
- Visit eftps.gov and enroll with your EIN
- The IRS mails a PIN and enrollment confirmation within 5–7 business days
- Set up banking info in EFTPS with the account you'll use for tax payments
- Test a small payment before your first deposit
You can schedule deposits up to 120 days in advance — many businesses schedule the deposit the moment payroll is approved, so it's never forgotten.
The Quarterly Reconciliation: Form 941
Every quarter, you file Form 941 to reconcile:
- Line 12: Total taxes after adjustments (what should have been deposited)
- Line 13: Total deposits you actually made
- Balance: refund (line 15) or amount due (line 14)
A clean quarter has Line 12 = Line 13 and no balance. If Line 13 < Line 12, you owe the difference — and if you didn't catch it early, FTD penalties have been accumulating for weeks. For a full walk-through of Form 941, see our Form 941 compliance guide.
Schedule B for Semi-Weekly Depositors
If you're on a semi-weekly schedule, Form 941 requires Schedule B — Report of Tax Liability for Semiweekly Schedule Depositors. This reports your daily tax liability for every business day of the quarter, not just the deposit dates. It's how the IRS verifies you're actually depositing on the right schedule, not just depositing the right total.
Constructing Schedule B from a spreadsheet is a nightmare. A payroll system should produce it automatically.
What to Do If You're Already Behind
If you're reading this after missing a deposit:
1. Catch Up Immediately
Every day you wait adds penalty. Make the deposit now. A 2% penalty becomes 5% after day 5, 10% after day 15.
2. Don't Hide Future Quarter Liabilities to Mask the Problem
Some businesses try to front-load deposits in the current quarter to "cover" a prior-quarter shortfall. This doesn't work — the IRS applies deposits to the period they were paid for, not where you want them applied. It creates a bigger mess.
3. File Form 941-X for Any Quarter with Mistakes
If a prior quarter's 941 was wrong, file a corrected 941-X. Don't wait for the IRS to catch it — penalties grow the longer it takes.
4. Request Penalty Abatement for First-Time Penalties
First-Time Abate (FTA) under the IRS Penalty Handbook IRM 20.1.1.3.6.1: if you've been compliant for the prior 3 years, you can request abatement of your first penalty of a type. Abatement is not automatic — you must request it in writing.
5. If the Balance Is Beyond Catch-Up, Enter an Installment Agreement
Form 9465 (Installment Agreement Request) or IRS online agreement portal. Better to be under a formal agreement than deemed delinquent. Agreements require you to stay current on NEW deposits — no grace there.
6. Consult a Tax Attorney for Trust-Fund Exposure
If unpaid trust-fund taxes exceed $25,000 or are more than a quarter old, talk to a tax attorney before contacting the IRS. The attorney can shield conversations under attorney-client privilege and prepare §6672 interview responses. Don't DIY once trust-fund exposure is on the table.
How Pleelo Prevents Deposit Mistakes
Pleelo's HR module builds deposit management into the payroll run itself.
Deposit schedule detection: Pleelo calculates your lookback-period liability and assigns monthly or semi-weekly status. If your liability growth during the current year approaches the $50,000 lookback threshold, Pleelo flags the likely schedule change before the IRS notification arrives.
Single-day $100K alerts: if any day's liability crosses $100,000, Pleelo alerts you to the next-business-day deposit requirement and the immediate switch to semi-weekly.
Deposit due date calculator: after every payroll, the exact deposit due date is computed based on your schedule and payday. The dashboard shows the next deposit deadline prominently.
EFTPS integration: Pleelo tracks every EFTPS payment against the payroll it covers. Deposits that don't match a payroll or a quarterly liability are flagged for review.
Schedule B auto-generation: for semi-weekly depositors, Pleelo produces Schedule B from the daily liability log. Filing Form 941 is a review, not a reconstruction.
Trust-fund visibility: the dashboard shows what portion of the next deposit is trust-fund (employee withholding) vs. employer share. If cash flow forces prioritization, you always know what's most critical.
Deposit reminder workflow: 2 days before the deposit due date, Pleelo reminds the bookkeeper and (optionally) the owner. Semi-weekly deposits never get forgotten between payroll runs.
The Short Version
- Your deposit schedule is monthly or semi-weekly, assigned by the IRS based on your lookback-period liability.
- Monthly: deposit by the 15th of the following month.
- Semi-weekly: Wed/Thu/Fri paydays → deposit by following Wednesday. Sat/Sun/Mon/Tue paydays → deposit by following Friday.
- $100,000 single-day liability = next-business-day deposit, plus permanent semi-weekly status.
- FTD penalties: 2% / 5% / 10% / 15% based on lateness.
- Trust Fund Recovery Penalty (§6672) = 100% personal liability for the responsible person on unpaid trust-fund taxes. Does not discharge in bankruptcy.
- EFTPS is the only deposit method.
- Form 941 (quarterly) reconciles liability vs. deposits. Schedule B for semi-weekly depositors.
Get the schedule right. Use a system that tracks it. Don't be the owner who loses their house to a Trust Fund Recovery assessment.
Stop Running Payroll Without a Deposit Discipline
Every payroll run creates a federal deposit obligation with a specific deadline. A spreadsheet will not track that. A payroll system that doesn't understand the lookback rule will not track it correctly either.
Pleelo's HR module calculates every deposit due date, reminds before deadlines, produces Schedule B from the daily liability log, and tracks EFTPS payments against each payroll.
Set up Pleelo payroll compliance →
Never miss a semi-weekly Wednesday again. Never surprise yourself with a Schedule B reconstruction. Never expose yourself to trust-fund personal liability because the deposit slipped your mind.
