Missing a tax deadline can mean penalties and interest that are easy to avoid. Here are the key federal dates in 2027 for calendar-year taxpayers. When a deadline falls on a weekend or legal holiday it moves to the next business day, and the dates below already reflect that. New York State individual returns and estimated payments generally follow the same dates.
January 15 (Friday): Fourth-quarter 2026 estimated tax payment due for individuals.
February 1 (Monday): Forms W-2 due to employees and the Social Security Administration. Forms 1099-NEC due to recipients and the IRS. The usual January 31 deadline falls on a Sunday.
March 15 (Monday): S corporation (Form 1120-S) and partnership (Form 1065) returns due, along with shareholder and partner Schedule K-1s. You can request an extension with Form 7004.
April 15 (Thursday): Individual returns (Form 1040) due, and so are calendar-year C corporation (Form 1120) and trust and estate (Form 1041) returns. First-quarter 2027 estimated tax is also due, as are 2026 IRA and HSA contributions.
May 17 (Monday): Form 990, 990-EZ and 990-PF due for calendar-year nonprofits. The usual May 15 deadline falls on a Saturday.
June 15 (Tuesday): Second-quarter estimated tax due.
September 15 (Wednesday): Third-quarter estimated tax due. Extended S corporation and partnership returns due.
September 30 (Thursday): Extended trust and estate returns due (the Form 1041 extension is 5½ months).
October 15 (Friday): Extended individual and C corporation returns due.
Remember: An extension gives you more time to file, not more time to pay. Any tax you owe is still due by the original deadline. Fiscal-year filers have different dates, and IRS disaster relief can postpone deadlines, so confirm your dates with us or at IRS.gov before you file.
Tax planning works best before these deadlines, not on them. To get a reminder schedule built around your situation, book a free consultation or call 516-493-2967.
This article is general information, not tax advice. Contact Ray to discuss your situation.
