Reference
Key filing and payment deadlines for individuals, business entities, and nonprofits.
This page is updated annually. Last updated for the 2026 tax year.
| Date | Deadline |
|---|---|
| January 15 | Q4 2025 estimated tax payment due |
| February 2 | Business 1099 & W-2 filing deadline |
| February 28 | Partnership & S-Corp documentation deadline Internal* |
| March 16 | Partnership & S-Corp filing deadline (Forms 1065, 1120-S) |
| March 31 | Individual documentation deadline Internal* |
| April 15 | Individual filing deadline (Form 1040) & Q1 2026 estimated tax payment due |
| June 15 | Q2 2026 estimated tax payment due |
| September 15 | Partnership & S-Corp extended filing deadline & Q3 2026 estimated tax payment due |
| October 15 | Individual extended filing deadline (Form 4868) |
Form 990 series filings are due on the 15th day of the fifth month following the end of your organization's fiscal year. An automatic six-month extension can be requested. Contact me at least 60 days before your deadline to ensure adequate lead time.
* Internal deadlines: February 28 (partnerships/S-Corps) and March 31 (individuals) are my internal document submission deadlines. If full documentation is submitted after these dates, I will make every effort to meet the filing deadline, but I do not guarantee it. Returns are processed in the order that complete documentation is received.