2026 Due Dates
Jan 15, 2026
Estimated tax deadline (common)
- Federal: Estimated tax payments follow scheduled due months/days as described in IRS calendar guidance. IRS Pub 509
- Kentucky: KY DOR lists “Estimated Tax/Individuals/One Fourth Estimate (Calendar year)” on Jan 15. KY January calendar
- Indiana: Confirm estimated payment timing in the IN DOR filing deadlines calendar. IN deadlines
Around the 20th (monthly)
KY monthly returns/payments cluster
Feb 2, 2026
W‑2/W‑3 + 1099‑NEC + Q4 Form 941 (shifted from Jan 31)
- Federal: Employment forms include W‑2/W‑3 and quarterly Form 941 deadlines; weekend/holiday rule applies. IRS employment due dates
- Federal: 1099‑NEC has an early filing/furnishing deadline. IRS 1099‑NEC instructions
- Indiana: WH‑3 (annual withholding reconciliation) is due Jan 31 each year (weekend/holiday may shift). IN withholding (WH‑3)
Mar 16, 2026
Partnership & S‑Corp returns (calendar‑year)
- Federal: Partnership (Form 1065) and S‑Corp (Form 1120‑S) are due based on IRS calendar rules (15th day of 3rd month after year‑end). IRS Pub 509
Mar 31, 2026
Many 1099 e‑file deadlines (varies by form)
- Federal: Many information returns have later electronic filing dates; verify by form. IRS 1099 instructions
Apr 15, 2026
Tax Day: annual returns + extensions + estimated tax
- Federal: Individual return and extension timing follow IRS calendar rules (15th day of 4th month after year‑end; weekend/holiday rule applies). IRS Pub 509
- Kentucky: KY DOR April calendar lists “Annual Individual Income Tax Return” and “Estimated Tax/Individuals/One Fourth Estimate.” KY April calendar
- Indiana: Annual due date to file individual income tax return is April 15. IN individual overview
- Indiana: If you need more time, request an extension by the deadline; extension doesn’t extend time to pay; extended filing date can be Nov 16, 2026 for 2025 return. IN extension
Apr 30, 2026
Quarter-end: Form 941 (Q1) + KY quarterly withholding
- Federal: Form 941 due dates include Apr 30; if you deposited timely, IRS allows additional days to file (per IRS guidance). IRS employment due dates
- Kentucky: KY DOR April calendar includes “Quarterly Income Tax Withholding Return (Jan 1—Mar 31)” due Apr 30. KY April calendar
May 15, 2026
Form 990 for calendar-year exempt organizations
- Federal: Form 990 due date is the 15th day of the 5th month after year-end (calendar year → May 15). IRS exempt org due dates
Jun 15, 2026
Estimated tax payment (common)
- Federal: Estimated tax payments follow IRS calendar schedule. IRS Pub 509
- KY/IN: Confirm state estimated payment timing via official calendars. KY calendar · IN deadlines
Jul 31, 2026
Form 941 (Q2) due
- Federal: Form 941 quarterly due dates include July 31. IRS employment due dates
Sep 15, 2026
Estimated tax payment (common)
- Federal: Estimated tax payments follow IRS calendar schedule. IRS Pub 509
Oct 15, 2026
Federal extended individual return deadline (common)
- Federal: Extension rules and timing are described in IRS calendar guidance. IRS Pub 509
- Indiana: Indiana’s extended filing deadline for the 2025 return is Nov 16, 2026 (not Oct 15). IN extension
Nov 2, 2026
Form 941 (Q3) due (shifted from Oct 31)
- Federal: Q3 Form 941 is due Oct 31; weekend/holiday rule shifts to next business day. IRS employment due dates
Nov 16, 2026
Indiana: extended deadline to file 2025 state return (with extension)
- Indiana: After submitting an extension request, you have until Nov 16, 2026 to file your 2025 Indiana return; interest and penalty rules apply per IN DOR guidance. IN extension
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Disclaimer: General information only. Deadlines can differ based on filing frequency, entity type, and weekend/holiday shifts. Verify using official sources (IRS, KY DOR, IN DOR).