Newsletter
Upcoming Tax Deadlines
October 1, 2026
Staying ahead of important tax deadlines helps ensure smooth operations and avoid unnecessary penalties. Each month, we highlight key due dates so you know exactly what’s coming up and can plan accordingly. Be sure to review the items below and reach out if you have any questions or need assistance with compliance.
October
Day | |
|---|---|
13 | Employees Who Work for Tips – If you received $20 or more in tips during September, report them to your employer. See Pub. 531 for more information on how to report tips to your employer. |
15 | Individuals – If you have an automatic 6-month extension to file your income tax return for 2025, file Form 1040 or Form 1040-SR and pay any tax, interest, and penalties due. |
15 | Corporations – File a 2025 calendar year income tax return (Form 1120) and pay any tax, interest, and penalties due. This due date applies only if you timely requested an automatic 6-month extension. Otherwise, see Corporations under April 15, earlier. |
31 | All employers – All employers – File Form 941 for the third quarter, covering payroll taxes for wages paid from July 1 through September 30. Quarterly state sales tax returns and payments may also be due for businesses that collect sales tax. Sales tax due dates vary by state and filing frequency. |
November
Day | |
|---|---|
10 | Employees Who Work for Tips – If you received $20 or more in tips during October, report them to your employer. See Pub. 531 for more information on how to report tips to your employer. |
December
Day | |
|---|---|
10 | Employees Who Work for Tips – If you received $20 or more in tips during November, report them to your employer. See Pub. 531 for more information on how to report tips to your employer. |
15 | Corporations – Deposit the fourth installment of estimated income tax for 2026. |
