Missing a payroll tax deadline is one of the most expensive mistakes a business owner can make. The IRS and California Employment Development Department (EDD) impose penalties and interest that can quickly escalate from a minor inconvenience to a serious financial burden. Yet every year, thousands of California businesses miss critical filing dates — often simply because they did not know the deadline existed.
After three decades of managing payroll tax compliance for businesses across California and nationwide, I have compiled this comprehensive guide to every payroll tax deadline that California employers need to know. Bookmark this page, set your reminders, and never pay an avoidable penalty again.
Federal Payroll Tax Deadlines
The IRS requires employers to file several payroll tax returns throughout the year. Here are the key deadlines every California business owner must meet:
Form 941 — Quarterly Federal Tax Return
Form 941 reports the income taxes, Social Security taxes, and Medicare taxes you have withheld from employee paychecks, along with your employer share of Social Security and Medicare taxes.
- Q1 (January - March): Due April 30
- Q2 (April - June): Due July 31
- Q3 (July - September): Due October 31
- Q4 (October - December): Due January 31 of the following year
Important note: If you deposited all taxes for the quarter on time and in full, you get an automatic 10-day extension. However, I always recommend filing by the original deadline to avoid any confusion or risk.
Form 940 — Annual Federal Unemployment Tax (FUTA)
Form 940 reports your annual Federal Unemployment Tax Act (FUTA) tax. The standard FUTA tax rate is 6.0% on the first $7,000 of each employee's wages, but most employers receive a credit of up to 5.4% for paying state unemployment taxes on time, reducing the effective rate to 0.6%.
- Annual filing deadline: January 31
If you deposited all FUTA taxes when due, you have until February 10 to file.
Form W-2 — Wage and Tax Statements
W-2 forms must be provided to employees and filed with the Social Security Administration.
- To employees: January 31
- To SSA: January 31
There are no extensions for W-2 filing. Late filings incur penalties of $60 to $310 per form, depending on how late the filing is.
Form 1099-NEC — Nonemployee Compensation
If you paid independent contractors $600 or more during the year, you must file Form 1099-NEC.
- To contractors and IRS: January 31
California State Payroll Tax Deadlines
California has its own set of payroll tax requirements administered by the Employment Development Department (EDD). As a California employer, you are responsible for several state-specific obligations.
DE 9 and DE 9C — Quarterly Contribution Return
The DE 9 reports total wages paid to all employees and taxes due, while the DE 9C reports wages paid to each individual employee.
- Q1: Due April 30
- Q2: Due July 31
- Q3: Due October 31
- Q4: Due January 31
State Disability Insurance (SDI)
California requires employers to withhold SDI from employee wages. The current SDI rate applies to all wages with no taxable wage limit. SDI withholdings are reported on your quarterly DE 9 filing.
California Personal Income Tax (PIT) Withholding
You must withhold California PIT from employee wages based on the employee's DE 4 withholding certificate. PIT withholdings are also reported quarterly on the DE 9.
Deposit Schedules
Your deposit frequency depends on your total tax liability:
- Semi-weekly depositors: Must deposit within specific days depending on payday
- Monthly depositors: Due by the 15th of the following month
- Quarterly depositors: Due with your DE 9 filing
- Next-day depositors: Must deposit the next business day if accumulating $100,000 or more
Penalties for Late Filing
Understanding the consequences of missed deadlines is critical. Here is what you face:
IRS penalties for late Form 941 filing: 5% of unpaid tax per month, up to 25% of the total tax due. If the return is more than 60 days late, the minimum penalty is the lesser of $510 or 100% of the tax.
IRS penalties for late deposits: 2% if 1-5 days late, 5% if 6-15 days late, 10% if more than 15 days late, and 15% if not deposited within 10 days of receiving the first IRS notice.
California EDD penalties: 15% penalty for late payment of contributions. Interest accrues on unpaid amounts at the adjusted annual rate plus 2%.
How to Never Miss a Deadline
The simplest way to ensure you never miss a payroll tax deadline is to work with a professional payroll service that handles all filings automatically. At Payroll Solutions, we manage every federal and state filing for our clients, including all quarterly returns, annual reconciliations, and year-end forms.
We track every deadline, prepare every form, and make every deposit on time. Our clients never receive penalty notices because we never miss a filing. That is the confidence that comes with 30 years of payroll tax compliance experience.
Need help with payroll tax compliance? Call us at 916-753-0376 or email info@payrollsolutions.ai. We offer free consultations and can have your tax filing on autopilot within days.
