Key federal and Pennsylvania deadlines for the 2027 filing season, for calendar-year taxpayers.
| Date | What is due |
|---|---|
| Jan 15, 2027 | Fourth-quarter 2026 estimated tax payment |
| Feb 1, 2027 | W-2 and 1099-NEC forms due to workers and the IRS; Form 941 for the fourth quarter; Form 940 |
| Mar 15, 2027 | Partnership (1065) and S corporation (1120-S) returns or extensions |
| Apr 15, 2027 | Individual (1040) and C corporation (1120) returns or extensions; Pennsylvania PA-40; FBAR; first-quarter estimated payment |
| Apr 30, 2027 | Form 941 for the first quarter |
| Jun 15, 2027 | Second-quarter estimated payment; returns of U.S. citizens and residents living abroad (automatic extension) |
| Aug 2, 2027 | Form 941 for the second quarter |
| Sep 15, 2027 | Extended partnership and S corporation returns; third-quarter estimated payment |
| Oct 15, 2027 | Extended individual and C corporation returns; extended FBAR |
| Nov 1, 2027 | Form 941 for the third quarter |
| Jan 18, 2028 | Fourth-quarter 2027 estimated tax payment |
When a due date falls on a weekend or a legal holiday, it moves to the next business day; the dates above already reflect this. The IRS can postpone deadlines for areas hit by disasters. Fiscal-year businesses and some local taxes have different dates.
Not sure which dates apply to you? Contact us and we will tell you.