| Date | Event |
| January 15, 2026 | 4th Quarter 2025 estimated tax payment due. |
| TBD, 2026 | IRS begins accepting 2025 federal tax returns |
| February 2, 2026 | Employers send W-2; certain 1099 forms (NEC, MISC, K) also due to recipients. |
| April 15, 2026 | Federal Tax Day: file your 2025 return. |
| April 15, 2026 | Deadline to file IRS Form 4868 for an extension. |
| April 15, 2026 | Deadline to make IRA/HSA contributions for 2025. |
| April 15, 2026 | 1st Quarter 2026 estimated tax payment due. |
| June 15, 2026 | 2nd Quarter 2026 estimated tax payment due. |
| September 15, 2026 | 3rd Quarter 2026 estimated tax payment due. |
| October 15, 2026 | Deadline to file extended 2025 tax return. |
| January 15, 2027 | 4th Quarter 2026 estimated tax payment due. |
| Date | Event |
| TBD, 2026 | IRS begins accepting 2025 federal tax returns |
| February 2, 2026 | Employers send W-2 and applicable 1099 forms to employees. |
| March 16, 2026 | Tax Day for partnerships, multi-member LLCs, S-corps (calendar year). For fiscal-year businesses, file by the 15th day of the third month after your fiscal year ends. |
| April 15, 2026 | Tax Day for C-corps (calendar year). For fiscal-year businesses, file by the 15th day of the fourth month after your fiscal year ends. |
| September 15, 2026 | Deadline for extended partnership and S-corp returns. |
| October 15, 2026 | Deadline for extended C-corp returns. |
Disclaimer: The deadlines listed are provided for general informational purposes. They cover key dates for most taxpayers and businesses but may not include every filing requirement. For complete guidance, please refer to IRS.gov or consult a qualified tax professional.
