Payroll tax deposit schedules and deadlines, explained

Withholding payroll taxes correctly is only half the job. The other half — depositing them with the government on the right schedule — is where employers get penalised, because the deadlines are unforgiving and the penalties escalate fast. Here’s how deposit schedules work and why they demand a system, not a memory.

Two deposit schedules

Employers deposit withheld federal income tax plus the employer and employee shares of Social Security and Medicare. The IRS assigns you one of two schedules:

• Monthly depositor — you deposit each month’s taxes by a set day of the following month.
• Semiweekly depositor — you deposit on a fast cadence tied to your paydays, with only a few business days after each payroll.

The lookback period decides which

You don’t choose your schedule — it’s determined by a lookback period, the total tax you reported over a prior window. Larger employers generally land on the faster semiweekly schedule. Because it’s based on past reporting, your schedule can change year to year, and you have to track which one applies.

The next-day rule

There’s a hard override for large liabilities: if you accumulate $100,000 or more in payroll tax liability on any single day, it must be deposited by the next business day, regardless of your normal schedule. For large employers this can be triggered by a big payroll or a bonus run, and missing it is an easy, expensive mistake.

Penalties escalate quickly

Late deposits carry tiered penalties that grow with how late the deposit is — a few days late is one rate, a week or two is higher, and beyond that higher still. On a large payroll, even a small percentage is a serious number. Unlike many compliance items, there’s little grace here.

Don’t forget the states

Federal is only one layer. Each state has its own deposit schedules and deadlines for state withholding and unemployment tax — a multi-state employer is juggling many calendars at once.