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2026 US Business Tax Calendar
Every federal IRS deadline for 2026 — C-corp, S-corp, partnership, sole proprietor, tax-exempt, and payroll — on one PDF. We'll email it to you, then send a short reminder 3 days before each deadline with exactly what needs to be done. Unsubscribe anytime.
What's inside
35 federal deadlines, sorted chronologically.
2026-01-15
Form 1040-ES Payment
Q4 2025 estimated tax for individuals and pass-through owners.
2026-02-02
Form W-2 / W-3 Info return
Furnish W-2 to employees and file with SSA. (Statutory Jan 31 shifted from Saturday.)
2026-02-02
Form 1099-NEC Info return
Furnish 1099-NEC for nonemployee compensation and file Copy A with IRS.
2026-02-02
Form 940 Payroll
Annual FUTA (federal unemployment) return for 2025. Pay any unpaid balance.
2026-02-02
Form 941 Payroll
Q4 2025 employment tax return (Social Security, Medicare, withholding). Feb 10 if all deposits were timely.
2026-02-17
Form 1099-B / 1099-S / 1099-MISC Info return
Furnish 1099-B (broker), 1099-S (real estate), 1099-MISC boxes 8 and 10 to recipients.
2026-03-02
Forms 1098 / 1099 / 3921 (paper) Info return
Paper file 1098, 1099 series (except 1099-NEC), W-2G, 3921, 3922 with IRS.
2026-03-16
Form 1065 Return
Partnership return plus Schedule K-1 / K-3 to partners. File Form 7004 for 6-month extension to Sep 15.
2026-03-16
Form 1120-S Return
S-Corp return plus Schedule K-1 to shareholders. File Form 7004 for 6-month extension to Sep 15.
2026-03-16
Form 2553 Election
Election to be taxed as S-Corp for 2026 (within 2 months 15 days of year start).
2026-03-31
Forms 1098 / 1099 (e-file) Info return
Electronic filing of 1098, 1099 series (except 1099-NEC), W-2G, 3921, 3922 with IRS.
2026-04-15
Form 1120 Return
C-Corp income tax return. Form 7004 for 6-month extension. Tax owed must be paid with the original return.
…and 23 more in the PDF.