2026 IRS Tax Calendar
Key federal tax deadlines for tax year 2026 — filed in 2027 — plus remaining 2025 filing-year dates. Filter by your situation and add to your calendar.
Q4 Estimated Tax (2025)
Fourth quarter estimated tax payment for tax year 2025.
Partnership & S-Corp Returns (TY 2025)
Form 1065 and 1120-S due for tax year 2025 (calendar-year filers).
Individual Return Due (TY 2025)
Form 1040 / 1040-NR returns and payments due for tax year 2025.
Q1 Estimated Tax (2026)
First quarter estimated tax payment for tax year 2026.
FBAR (FinCEN 114)
Foreign bank account reporting for 2025 (auto-extended to Oct 15, 2026).
C-Corp Return Due (TY 2025)
Form 1120 due for calendar-year filers.
Q2 Estimated Tax (2026)
Second quarter estimated tax payment for tax year 2026.
Expat Filing Deadline (TY 2025)
Automatic 2-month extension for US citizens living abroad.
Q3 Estimated Tax (2026)
Third quarter estimated tax payment for tax year 2026.
Extended Partnership & S-Corp (TY 2025)
Extended due date for Forms 1065 and 1120-S.
Extended Individual Return (TY 2025)
Final deadline for individual returns on extension.
FBAR Final Deadline
Final auto-extended FBAR deadline for 2025 accounts.
Q4 Estimated Tax (2026)
Fourth quarter estimated tax payment for tax year 2026.
Partnership & S-Corp Returns (TY 2026)
Form 1065 and 1120-S due for tax year 2026.
Individual Return Due (TY 2026)
Form 1040 / 1040-NR returns and payments due for tax year 2026.
Expat Filing Deadline (TY 2026)
Automatic 2-month extension for US citizens living abroad.
Extended Individual Return (TY 2026)
Final deadline for TY 2026 returns on extension.