TAX DEADLINES
2026 Tax Deadlines for Filing 2025 Business Returns |
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| Partnership Tax Deadlines: | Due Date: |
|---|---|
| Original tax deadline for partnerships (Form 1065) | March 16, 2026 |
| Extension tax deadline for partnerships (Form 1065) | September 15, 2026 |
| S Corporation Tax Deadlines: | Due Date: |
| Original tax deadline for S Corporations (Form 1120S) | March 16, 2026 |
| Extension tax deadline for S Corporations (Form 1120S) | September 15, 2026 |
| C Corporation Tax Deadlines: | Due Date: |
| Original tax deadline for C Corporations (Form 1120) | April 15, 2026 |
| Extension tax deadline for C Corporations (Form 1120) | October 15, 2026 |
| Sole Proprietor Tax Deadlines: | Due Date: |
| Original tax deadline for sole proprietors and individuals (Form 1040) | April 15, 2026 |
| Extension tax deadline for sole proprietors and individuals (Form 1040) | October 15, 2026 |
| Nonprofit Tax Deadlines: | Due Date: |
| Original tax deadline for exempt organizations (Form 990) | May 15, 2026 |
| Extension tax deadline for exempt organizations (Form 990) | November 16, 2026 |
2026 Estimated Tax Payment Due Date (Calendar Year): |
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| Quarterly Deadline: | Due Date: |
|---|---|
| First Quarter Tax Estimate Deadline | April 15, 2026 |
| Second Quarter Tax Estimate Deadline | June 15, 2026 |
| Third Quarter Tax Estimate Deadline | September 15, 2026 |
| Fourth Quarter Tax Estimate Deadline (Corporations) | December 15, 2026 |
| Fourth Quarter Tax Estimate Deadline (Individuals) | January 15, 2026 |
For more info from he IRS website click here.
