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Essential May 2026 Tax Deadlines for Small Businesses

Managing payroll and tax compliance is a core responsibility for small business owners in Gilbert, AZ, and beyond. Staying ahead of deadlines prevents costly penalties and keeps your operations running smoothly. Here are the crucial business tax due dates for May 2026.

May 11: Form 941 Extended Filing

If you made full and timely deposits for your first-quarter Social Security, Medicare, and withheld income taxes, you have an extended deadline to file Form 941 for Q1 2026.

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May 15: Monthly Employer Deposits

For employers following the monthly deposit schedule, May 15 is your deadline to remit April 2026 withheld income tax, Medicare, and Social Security. This date also applies to April 2026 nonpayroll withholding deposits under the monthly rule.

Holiday and Disaster Adjustments

When deadlines fall on weekends or legal holidays, the IRS shifts the due date to the next valid business day. Furthermore, businesses in federally declared disaster zones often receive automatic extensions. Verify specific disaster declarations and relief via the links below:

Need help streamlining your small business accounting? Contact the CPA team at Martinez & Shanken PLLC today to schedule a consultation.

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