Compliance calendar

Every 2026 US business tax deadline, in one table

Federal returns, quarterly estimates, payroll filings and the state dates that catch people out, with weekend shifts already applied. Add the whole year to your calendar in one click, with a one-week reminder on each date.

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    DateDeadlineLevel
    15 Jan 2026Q4 2025 estimated tax payment (Form 1040-ES / 1120-W)federal
    2 Feb 2026W-2 and 1099-NEC to recipients and IRS/SSA; Q4 941; annual 940 (Jan 31 falls on a Saturday)federal
    2 Mar 2026Delaware corporation annual report and franchise tax (March 1 falls on a Sunday)state
    16 Mar 2026S-corp (1120-S) and partnership (1065) returns, or extension (Form 7004); Form 2553 for 2026 S-corp statusfederal
    1 Apr 2026Georgia annual registrationstate
    15 Apr 2026Individual (1040), C-corp (1120), foreign-owned LLC (5472 + pro forma 1120), or extension; Q1 2026 estimate; FBAR (automatic extension to Oct 15); North Carolina LLC annual reportfederal
    1 May 2026Florida annual report ($400 late fee after this date)state
    15 May 2026Texas franchise tax report and Public Information Reportstate
    1 Jun 2026Delaware LLC and LP franchise tax ($300 flat)state
    15 Jun 2026Q2 2026 estimated tax; 1040-NR for non-residents without US wages; expats abroad automatic 1040 extension datefederal
    31 Jul 2026Q2 941 payroll returnfederal
    15 Sep 2026Q3 2026 estimated tax; extended 1120-S and 1065 returns duefederal
    15 Oct 2026Extended 1040, 1120 and foreign-owned LLC 5472 returns due; FBAR extended deadlinefederal
    2 Nov 2026Q3 941 payroll return (Oct 31 falls on a Saturday)federal
    15 Dec 2026Q4 corporate estimated tax (calendar-year C-corps)federal
    15 Jan 2027Q4 2026 estimated tax payment (individuals and pass-through owners)federal

    Dates that fall on a weekend or federal holiday move to the next business day; the table already reflects that. State dates listed are the ones we see missed most; every state has its own calendar, which we track for clients. Beneficial ownership (BOI) reports: domestic US companies have been exempt since March 2025; foreign-registered companies doing business in the US still report to FinCEN.

    The three deadlines people miss most

    1. March 16 for S-corps and partnerships. A month before the date everyone knows, and the late penalty runs per owner, per month.
    2. April 15 for foreign-owned LLCs. Form 5472 with a pro forma 1120 is due even with zero revenue, cannot be e-filed, and carries a $25,000 penalty.
    3. State annual reports. Delaware June 1, Florida May 1, Texas May 15: none of them line up with the federal calendar, and a missed one costs the entity its good standing.

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