| Individual Income Tax Return (Form 1040) |
April 15, 2026 |
Standard deadline (Wednesday). |
| Extension for Individuals (Form 4868) |
April 15, 2026 |
Extension gives you until October 15, 2026, but taxes owed are still due April 15. |
| Estimated Tax Payments (Individuals) |
Apr 15, Jun 15, Sep 15, 2026; Jan 15, 2027 |
Quarterly payments for self-employed or those without full withholding. |
| Partnership Returns (Form 1065) |
March 16, 2026 |
March 15 is a Sunday, so the deadline moves to Monday, March 16. |
| S Corporation Returns (Form 1120-S) |
March 16, 2026 |
Same weekend adjustment as partnerships. |
| C Corporation Returns (Form 1120) |
April 15, 2026 |
Calendar-year corporations; fiscal-year corps = 15th day of the 4th month after year-end. |
| Extension for Corporations (Form 7004) |
Same as original due date |
Extends 6 months (e.g., to Oct 15 for C corps). |
| Nonprofit Returns (Form 990) |
May 15, 2026 |
Applies to calendar-year organizations. |
| W-2 Forms to Employees |
January 31, 2026 |
Also deadline for filing with the SSA. |
| 1099 Forms to Contractors |
January 31, 2026 |
Applies to 1099-NEC; other 1099s may differ slightly. |
| Quarterly Payroll Tax Returns (Form 941) |
Apr 30, Jul 31, Oct 31, 2026; Jan 31, 2027 |
For businesses with employees. |
| FBAR (FinCEN Form 114) |
April 15, 2026 (auto extension to Oct 15) |
Required for foreign accounts >$10,000 aggregate. |
| State Tax Deadlines |
Varies by state |
Most follow federal dates, but confirm with your state tax agency. |
