March 2025 tax and compliance deadlines

Welcome to the March 2025 tax and compliance deadlines article. With busy season in full swing, staying on top of these deadlines is crucial. Make sure to review them and pass them along to your clients.

In March, it is recommended that you:

• File extensions for individuals who have not met your deadline for return preparation.
• Remind individual clients of April 15 estimated tax payment.
• File extensions for S corporations or partnerships that will not meet the March 15 filing deadline.

Key Compliance Dates

Monday, March 3—Farmers and fishermen: File your 2024 income tax return (Form 1040 or Form 1040-SR) and pay any tax due. However, you have until April 15 to file if you paid your 2024 estimated tax by January 18, 2025.

Wednesday, March 5—Semiweekly depositors deposit FICA and withheld income tax on wages paid on February 26-28. 

Friday, March 7—Semiweekly depositors deposit FICA and withheld income tax on wages paid on March 1-4. 

Monday, March 10—Tipped employees who received $20 or more in tips during February report them to the employer on Form 4070, Employee’s Report of Tips to Employer. 

Wednesday, March 12—Semiweekly depositors deposit FICA and withheld income tax on wages paid on March 5-7. 

Friday, March 14—Semiweekly depositors deposit FICA and withheld income tax for March 8-11. 

Monday, March 17:

• Calendar-year S corporations file 2024 income tax return on Form 1120S, U.S. Income Tax for an S Corporation; alternatively, file for an automatic 6-month extension (Form 7004, Application for Automatic Extension of Time to File Certain Business Income Tax, Information, and Other Returns).
• Calendar-year partnerships file 2024 information return (Form 1065, U.S. Return of Partnership Income; alternatively, file for an automatic 6-month extension (Form 7004).
• Monthly depositors deposit FICA and withheld income tax for February. 

Wednesday, March 19:

• Semiweekly depositors deposit FICA and withheld income tax on wages paid on March 12-14. 
• Partnerships: File a 2024 calendar-year return (Form 1065). Provide each partner with a copy of their Schedule K-1 (Form 1065), Partner’s Share of Income, Deductions, Credits, etc., or substitute Schedule K-1 (Form 1065) and, if applicable, Schedule K-3 (Form 1065) or substitute Schedule K-3 (Form 1065).
• To request an automatic 6-month extension of time to file the return, file Form 7004. Then, file the return and provide each partner with a copy of their final or amended (if required) Schedule K-1 (Form 1065) and, if applicable, Schedule K-3 (Form 1065) by September 15.
• S corporations: File a 2024 calendar-year income tax return (Form 1120-S) and pay any tax due. Provide each shareholder with a copy of their Schedule K-1 (Form 1120- S), Shareholder’s Share of Income, Deductions, Credits, etc., or substitute Schedule K-1 (Form 1120-S) and, if applicable, Schedule K-3 (Form 1120-S) or substitute Schedule K-3 (Form 1120-S).

Friday, March 21—Semiweekly depositors deposit FICA and withheld income tax on wages paid on March 15-18. 

Wednesday, March 26—Semiweekly depositors deposit FICA and withheld income tax on wages paid on March 19-21. 

Friday, March 28—Semiweekly depositors deposit FICA and withheld income tax on wages paid on March 22-25. 

Intuit® Accountant Resources

• The March 2025 calendar with filing deadlines and reminders for you and your clients.
• Intuit Tax Guide 2024
• IRS annual inflation adjustments for tax years 2024 and 2025
• Key Tax Facts for 2024