Resources
Important dates & useful links
The deadlines my clients ask about most, in one place. If a due date falls on a weekend or federal holiday, it generally shifts to the next business day — call if you're unsure.
Calendar
Important filing dates
| Filing frequency | Due date(s) |
|---|---|
| Annual | March 20 |
| Quarterly | Mar 20 · Jun 20 · Sep 20 · Dec 20 |
| Monthly | 20th of each month |
| Filing | Due date(s) |
|---|---|
| Quarterly payroll tax returns | Apr 30 · Jul 30 · Oct 31 · Jan 31 |
| Annual payroll tax returns | January 31 |
| W-2 & 1099 recipient copies | January 31 |
| W-2 & 1099 IRS copies | February 28 |
| Type | Due date(s) |
|---|---|
| Corporate estimated taxes | Mar 15 · Jun 15 · Sep 15 · Dec 15 |
| Estimated income taxes | Apr 15 · Jun 15 · Sep 15 · Jan 15 |
| Return | Due date |
|---|---|
| Corporate (C and S corporations) | March 15 |
| Personal income tax | April 15 |
| Non-profit (Form 990) | May 15 |
These dates are provided for general guidance only. Deadlines change, extensions apply differently to different filers, and your situation may not follow the standard calendar. Confirm your specific due dates before relying on them — a quick call is free: (631) 908-5130.
Official sources
Important links
Direct links to the government tools clients ask for most.
Deadline FAQ
Quick answers
When is my personal income tax return due?
April 15. Estimated income tax payments are due April 15, June 15, September 15 and January 15.
When are corporate tax returns due?
March 15 for both C corporations and S corporations. Corporate estimated payments are due March 15, June 15, September 15 and December 15.
When are New York sales tax returns due?
Annual filers: March 20. Quarterly filers: March 20, June 20, September 20 and December 20. Monthly filers: the 20th of each month.
When do W-2s and 1099s have to go out?
Recipient copies are due January 31 and IRS copies are due February 28. Annual W-2 and 1099 filing is one of the services I handle.
When is the non-profit Form 990 due?
May 15.
Not sure which deadlines apply to you?
Tell me about your business and I'll map out exactly what you owe and when. No charge for the conversation.