Tax Deadlines

Month

M	T	W	T	F	S	S
	0 events 1 0 events, 1	1 event 2 1 event, 2 2026-09-02 Deposit payroll tax for payments on August 26-28 if the semiweekly deposit rule applies. Deposit payroll tax for payments on August 26-28 if the semiweekly deposit rule applies. September 2 Deposit payroll tax for payments on August 26-28 if the semiweekly deposit rule applies.	0 events 3 0 events, 3	1 event 4 1 event, 4 2026-09-04 Deposit payroll tax for payments on August 29-Sep 1 if the semiweekly deposit rule applies. Deposit payroll tax for payments on August 29-Sep 1 if the semiweekly deposit rule applies. September 4 Deposit payroll tax for payments on August 29-Sep 1 if the semiweekly deposit rule applies.	0 events 5 0 events, 5	0 events 6 0 events, 6
0 events 7 0 events, 7	0 events 8 0 events, 8	0 events 9 0 events, 9	2 events 10 2 events, 10 2026-09-10 Deposit payroll tax for payments on September 2-4 if the semiweekly deposit rule applies. Deposit payroll tax for payments on September 2-4 if the semiweekly deposit rule applies. September 10 Deposit payroll tax for payments on September 2-4 if the semiweekly deposit rule applies. 2026-09-10 Employers: Employees are required to report to you tips of $20 or more earned during August. Employers: Employees are required to report to you tips of $20 or more earned during August. September 10 Employers: Employees are required to report to you tips of $20 or more earned during August.	1 event 11 1 event, 11 2026-09-11 Deposit payroll tax for payments on September 5-8 if the semiweekly deposit rule applies. Deposit payroll tax for payments on September 5-8 if the semiweekly deposit rule applies. September 11 Deposit payroll tax for payments on September 5-8 if the semiweekly deposit rule applies.	0 events 12 0 events, 12	0 events 13 0 events, 13
0 events 14 0 events, 14	10 events 15 10 events, 15 2026-09-15 Social security, Medicare, and withheld income tax: Deposit tax for payments made in June if the monthly deposit rule applies. Social security, Medicare, and withheld income tax: Deposit tax for payments made in June if the monthly deposit rule applies. September 15 Social security, Medicare, and withheld income tax: Deposit tax for payments made in June if the monthly deposit rule applies. 2026-09-15 Corporations: File calendar year Form 1120S if you timely requested a 6-month extension. Corporations: File calendar year Form 1120S if you timely requested a 6-month extension. September 15 Corporations: File calendar year Form 1120S if you timely requested a 6-month extension. 2026-09-15 Corporations: Deposit the third installment of your 2026 estimated tax – see Pub. 542 and EFTPS. Corporations: Deposit the third installment of your 2026 estimated tax – see Pub. 542 and EFTPS. September 15 Corporations: Deposit the third installment of your 2026 estimated tax – see Pub. 542 and EFTPS. 2026-09-15 Partnerships: File calendar year Form 1065 if you timely requested a 6-month extension. Partnerships: File calendar year Form 1065 if you timely requested a 6-month extension. September 15 Partnerships: File calendar year Form 1065 if you timely requested a 6-month extension. 2026-09-15 Individuals: Pay the third installment of your 2026 estimated tax – Use Form 1040-ES. Individuals: Pay the third installment of your 2026 estimated tax – Use Form 1040-ES. September 15 Individuals: Pay the third installment of your 2026 estimated tax – Use Form 1040-ES. 2026-09-15 Tax Exempt Orgs: Deposit Estimated Tax for 3rd quarter due on Unrelated Business Taxable Income for Tax-Exempt Organizations. Use Form 990-W to determine the amount of estimated tax payments required. Tax Exempt Orgs: Deposit Estimated Tax for 3rd quarter due on Unrelated Business Taxable Income for Tax-Exempt Organizations. Use Form 990-W to determine the amount of estimated tax payments required. September 15 Tax Exempt Orgs: Deposit Estimated Tax for 3rd quarter due on Unrelated Business Taxable Income for Tax-Exempt Organizations. Use Form 990-W to determine the amount of estimated tax payments required. 2026-09-15 Withholding Agent: File calendar year Form 1042 if you timely requested a 6-month extension. Withholding Agent: File calendar year Form 1042 if you timely requested a 6-month extension. September 15 Withholding Agent: File calendar year Form 1042 if you timely requested a 6-month extension. 2026-09-15 Partnerships: File calendar year Form 8804 and Forms 8805 if you timely requested a 6-month extension. Partnerships: File calendar year Form 8804 and Forms 8805 if you timely requested a 6-month extension. September 15 Partnerships: File calendar year Form 8804 and Forms 8805 if you timely requested a 6-month extension. 2026-09-15 Partnerships: File Form 8813 quarterly payment voucher and pay any tax due. Partnerships: File Form 8813 quarterly payment voucher and pay any tax due. September 15 Partnerships: File Form 8813 quarterly payment voucher and pay any tax due. 2026-09-15 Foreign Trusts with a U.S. Owner: File calendar year Form 3520-A if you timely requested a 6-month extension. Foreign Trusts with a U.S. Owner: File calendar year Form 3520-A if you timely requested a 6-month extension. September 15 Foreign Trusts with a U.S. Owner: File calendar year Form 3520-A if you timely requested a 6-month extension.	1 event 16 1 event, 16 2026-09-16 Deposit payroll tax for payments on September 9-11 if the semiweekly deposit rule applies. Deposit payroll tax for payments on September 9-11 if the semiweekly deposit rule applies. September 16 Deposit payroll tax for payments on September 9-11 if the semiweekly deposit rule applies.	0 events 17 0 events, 17	1 event 18 1 event, 18 2026-09-18 Deposit payroll tax for payments on September 12-15 if the semiweekly deposit rule applies. Deposit payroll tax for payments on September 12-15 if the semiweekly deposit rule applies. September 18 Deposit payroll tax for payments on September 12-15 if the semiweekly deposit rule applies.	0 events 19 0 events, 19	0 events 20 0 events, 20
0 events 21 0 events, 21	0 events 22 0 events, 22	1 event 23 1 event, 23 2026-09-23 Deposit payroll tax for payments on September 16-18 if the semiweekly deposit rule applies. Deposit payroll tax for payments on September 16-18 if the semiweekly deposit rule applies. September 23 Deposit payroll tax for payments on September 16-18 if the semiweekly deposit rule applies.	0 events 24 0 events, 24	1 event 25 1 event, 25 2026-09-25 Deposit payroll tax for payments on September 19-22 if the semiweekly deposit rule applies. Deposit payroll tax for payments on September 19-22 if the semiweekly deposit rule applies. September 25 Deposit payroll tax for payments on September 19-22 if the semiweekly deposit rule applies.	0 events 26 0 events, 26	0 events 27 0 events, 27
0 events 28 0 events, 28	0 events 29 0 events, 29	3 events 30 3 events, 30 2026-09-30 Deposit payroll tax for payments on September 23-25 if the semiweekly deposit rule applies. Deposit payroll tax for payments on September 23-25 if the semiweekly deposit rule applies. September 30 Deposit payroll tax for payments on September 23-25 if the semiweekly deposit rule applies. 2026-09-30 File Form 730 and pay tax on wagers accepted during August. File Form 730 and pay tax on wagers accepted during August. September 30 File Form 730 and pay tax on wagers accepted during August. 2026-09-30 File Form 2290 and pay the tax for vehicles first used during August. File Form 2290 and pay the tax for vehicles first used during August. September 30 File Form 2290 and pay the tax for vehicles first used during August.