Missing a payroll tax deposit deadline triggers IRS penalties that increase the longer you wait. The penalty structure is graduated based on how late your deposit arrives:

• 2% of the unpaid amount for deposits 1 to 5 days late
• 5% for deposits 6 to 15 days late
• 10% for deposits more than 15 days late
• 15% for amounts still unpaid 10 days after the IRS sends its first notice

These percentages apply to the amount you should have deposited, not your entire payroll. On top of the penalty, the IRS charges interest that compounds daily from the original due date. Interest rates change quarterly, typically running around 7 to 8 percent annually depending on federal rates.

California adds its own penalties through the EDD. Late deposits of state income tax withholding, unemployment insurance, and state disability insurance trigger penalties ranging from 10% to 15% plus interest. If you file your DE 9 quarterly report late, that’s an additional penalty. The state and federal penalties stack, so missing a deposit deadline can hit you twice.

The penalty most business owners don’t know about is the trust fund recovery penalty. Payroll taxes withheld from employee paychecks, including federal income tax and the employee portion of Social Security and Medicare, are considered trust fund taxes. The IRS treats this money as belonging to the government from the moment it’s withheld. If your business fails to pay these taxes, the IRS can assess a penalty equal to 100% of the unpaid amount against any “responsible person” who willfully failed to pay.

Responsible person usually means anyone with authority over the business finances, including owners, officers, and sometimes bookkeepers who control which bills get paid. This penalty is personal. It doesn’t go away if your business closes. The IRS can pursue collections against your personal assets, wages, and bank accounts for years.

The most common reasons businesses miss deposits are cash flow problems and confusion about deposit schedules. If business is slow and you use the payroll tax money to cover other expenses, you’re borrowing from the IRS at penalty rates that make credit cards look cheap. Working with a full-service payroll provider takes the timing risk off your plate. The payroll service calculates your liability and makes the deposit on schedule, preventing the most common compliance mistakes.

If you’ve already missed deposits, address it immediately. The penalties only get worse with time. File any missing returns even if you can’t pay the full amount. The IRS offers payment plans, and the failure to file penalty is separate from the failure to pay penalty. Los Angeles QuickBooks bookkeepers can help you get caught up on filings and set up systems so deposits happen automatically going forward.