Tax Due Dates

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Tax Due Dates — 2026 & 2027

Federal, Oregon & Portland-area deadlines  ·  Calendar-year taxpayers only  ·  Last updated May 2026

ℹ️ Important: Extension to file does not extend the time to pay tax. If a due date falls on a weekend or legal holiday, it moves to the next business day.
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Federal Income Tax — Filing Deadlines
Taxpayer / Filing type Form 2026 due (2025 tax yr) 2026 extended 2027 due (2026 tax yr) 2027 extended
Partnerships & multi-member LLCs Form 1065 Mar 16, 2026 Sep 15, 2026 Mar 15, 2027 Sep 15, 2027
S corporations Form 1120-S Mar 16, 2026 Sep 15, 2026 Mar 15, 2027 Sep 15, 2027
C corporations Form 1120 Apr 15, 2026 Oct 15, 2026 Apr 15, 2027 Oct 15, 2027
Individual income tax Form 1040 Apr 15, 2026 Oct 15, 2026 Apr 15, 2027 Oct 15, 2027
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Federal Estimated Tax Payment Due Dates
Tax yearIndividualsC corporations
2026 tax year
Apr 15, 2026Jun 15, 2026Sep 15, 2026Jan 15, 2027
Apr 15, 2026Jun 15, 2026Sep 15, 2026Dec 15, 2026
2027 tax year
Apr 15, 2027Jun 15, 2027Sep 15, 2027Jan 18, 2028
Apr 15, 2027Jun 15, 2027Sep 15, 2027Dec 15, 2027
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Oregon Income Tax — Filing Deadlines
Taxpayer / Filing type Form 2026 due 2026 extended 2027 due 2027 extended
Partnerships & multi-member LLCs OR-65 Mar 16, 2026 Sep 15, 2026 Mar 15, 2027 Sep 15, 2027
S corporations OR-20-S Mar 16, 2026 Sep 15, 2026 Mar 15, 2027 Sep 15, 2027
C corporations OR-20 May 15, 2026 Nov 16, 2026 May 17, 2027 Nov 15, 2027
Individual income tax OR-40 / OR-40-N / OR-40-P Apr 15, 2026 Oct 15, 2026 Apr 15, 2027 Oct 15, 2027

⚠ Oregon C corp returns are generally due one month after the federal C corp return due date.

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Oregon Estimated Tax Payment Due Dates
Tax yearIndividual estimated paymentsCorporation estimated payments
2026 tax year
Apr 15Jun 15Sep 15Jan 15, 2027
Apr 15Jun 15Sep 15Dec 15, 2026
2027 tax year
Apr 15Jun 15Sep 15Jan 18, 2028
Apr 15Jun 15Sep 15Dec 15, 2027
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Oregon PTE-E Tax — Filing & Payment
ℹ️ Applies to qualifying S corps, partnerships & LLCs taxed as partnerships. Program covers tax years 2022–2027 unless Oregon extends it. Election made by filing Form OR-21 with the election box checked.
Filing / Payment type2026 due2026 extended2027 due2027 extended
OR-21 return & election Apr 15, 2026 Oct 15, 2026 Apr 15, 2027 Oct 15, 2027
PTE-E tax payment Apr 15, 2026 ✕ No extension to pay Apr 15, 2027 ✕ No extension to pay
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Oregon PTE-E Estimated Payment Due Dates
Tax yearPTE-E estimated payment due dates
2026 tax year
Apr 15, 2026Jun 15, 2026Sep 15, 2026Jan 15, 2027
2027 tax year
Apr 15, 2027Jun 15, 2027Sep 15, 2027Jan 18, 2028
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Oregon Corporate Activity Tax (CAT)
ℹ️ Applies to Oregon taxable commercial activity above the applicable threshold. Annual return due the 15th day of the 4th month following year-end.
Filing / Payment type2026 due2026 extended2027 due2027 extended
Oregon CAT annual return Apr 15, 2026 Nov 16, 2026 Apr 15, 2027 Nov 15, 2027
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Oregon CAT Estimated Payment Due Dates

CAT estimated payments due on the last day of the 4th, 7th & 10th months of the tax year, and the last day of the first month following year-end.

Tax yearCAT estimated payment due dates
2026 tax year
Apr 30, 2026Jul 31, 2026Nov 2, 2026Feb 1, 2027
2027 tax year
Apr 30, 2027Aug 2, 2027Nov 1, 2027Jan 31, 2028
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Portland / Multnomah / Metro — Business Tax Filing
Tax2026 due2026 extended2027 due2027 extended
City of Portland Business License Tax Apr 15, 2026Oct 15, 2026 Apr 15, 2027Oct 15, 2027
Multnomah County Business Income Tax Apr 15, 2026Oct 15, 2026 Apr 15, 2027Oct 15, 2027
Metro SHS Business Income Tax Apr 15, 2026Oct 15, 2026 Apr 15, 2027Oct 15, 2027
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Portland-area Business Estimated Payments
Tax yearBusiness estimated payment due dates
2026 tax year
Apr 15, 2026Jun 15, 2026Sep 15, 2026Dec 15, 2026
2027 tax year
Apr 15, 2027Jun 15, 2027Sep 15, 2027Dec 15, 2027
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Metro SHS & Multnomah County PFA — Personal Income Tax
Tax2026 due2026 extended2027 due2027 extended
Metro SHS Personal Income Tax Apr 15, 2026Oct 15, 2026 Apr 15, 2027Oct 15, 2027
Multnomah County PFA Personal Income Tax Apr 15, 2026Oct 15, 2026 Apr 15, 2027Oct 15, 2027
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Metro SHS & Multnomah PFA Personal Estimated Payments
Tax yearPersonal estimated payment due dates
2026 tax year
Apr 15, 2026Jun 15, 2026Sep 15, 2026Jan 15, 2027
2027 tax year
Apr 15, 2027Jun 15, 2027Sep 15, 2027Jan 18, 2028
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Portland Arts Tax
⚠️ No extension available to file or pay the Arts Tax. Due same day as the federal tax return.
Tax2026 due (2025 tax yr)Extension?2027 due (2026 tax yr)Extension?
Portland Arts Tax Apr 15, 2026 ✕ No Apr 15, 2027 ✕ No
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TriMet Self-Employment Tax

Self-employment tax only — does not cover employer payroll tax. Generally due same day as federal and Oregon individual income tax returns.

Tax2026 due2026 extended2027 due2027 extended
TriMet Self-Employment Tax Apr 15, 2026 Oct 15, 2026 Apr 15, 2027 Oct 15, 2027

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