May 2026 Business Tax Deadlines & Due Dates

Staying on top of your business tax deadlines is a core part of maintaining clean financial systems and eliminating surprises. For small and mid-size businesses, tracking these dates ensures your cash flow forecasting remains accurate and your operations run smoothly.

Critical May 2026 Tax Deadlines

May 11: Form 941 Filing
File Form 941 for the first quarter of 2026. This specific deadline applies only if you deposited the tax for the quarter in full and on time.

May 15: Employer’s Monthly Deposit
If your business follows monthly deposit rules, today is the deadline to deposit Social Security, Medicare, and withheld income tax for April 2026. This also applies to nonpayroll withholding deposits for April.

Tax deadline and compliance letter

Gain Year-Round Financial Clarity and Confidence
Partner with Lizza & Carullo CPAs & Advisors for ongoing guidance, proactive tax planning, and strategic financial support. Whether you’re growing a business or navigating personal taxes, our year-round advisory approach helps you stay organized, tax-efficient, and in control — with a team that’s here when you need us, not just at tax time.
Schedule Your Discovery Call

Weekends, Holidays, and Disaster Relief

If a deadline lands on a weekend or legal holiday, it automatically shifts to the next business day.

Additionally, geographical areas designated as disaster zones receive automatic deadline extensions. For current extension updates, visit:

Need help building structured financial routines and keeping your month-end discipline on track? Schedule a consultation with Lizza & Carullo CPAs & Advisors in East Rutherford, NJ, to align your tax strategy and keep your business future-focused.

Gain Year-Round Financial Clarity and Confidence
Partner with Lizza & Carullo CPAs & Advisors for ongoing guidance, proactive tax planning, and strategic financial support. Whether you’re growing a business or navigating personal taxes, our year-round advisory approach helps you stay organized, tax-efficient, and in control — with a team that’s here when you need us, not just at tax time.
Schedule Your Discovery Call
Share this article...

Want tax & accounting tips and insights?

Sign up for our newsletter.

I confirm this is a service inquiry and not an advertising message or solicitation. By clicking “Submit”, I acknowledge and agree to the creation of an account and to the and .
Lizza & Carullo CPAs & Advisors Smart tax and advisory support for your business and personal finances.
Welcome to the Lizza & Carullo CPABot. I can help you learn about our Business Advisory Programs, year-round personal tax planning, how to work with our team, and how to schedule a Discovery Call. What would you like to do today?
Please fill out the form and our team will get back to you shortly The form was sent successfully