For family offices and closely held entities, strict compliance with payroll and withholding rules is critical to minimizing unnecessary regulatory scrutiny. Here are the essential May 2026 tax deadlines your organization needs to track.

May 11: Form 941 Filing

File Form 941 for the first quarter of 2026. This extended deadline applies exclusively if your entity deposited the Q1 taxes in full and on time.

May 15: Monthly Deposit Due

If your business operates under monthly deposit rules, today is the deadline to deposit Social Security, Medicare, and withheld income tax for April 2026. This also applies to April nonpayroll withholding deposits.

Scheduling and Extensions

Deadlines falling on weekends or legal holidays automatically roll to the next business day. Federally declared disaster areas may also receive extended filing windows. Verify your geographic area’s status here:

• FEMA: https://www.fema.gov/disaster/declarations
• IRS: https://www.irs.gov/newsroom/tax-relief-in-disaster-situations

At Sullivan & Company CPA Inc. in Burlingame, we help you maintain control over your financial legacy. Contact us for comprehensive compliance or advisory support.