Alder & Finch AccountingCPAs & Advisors

Tax deadline calendar

The dates that matter this year, with one tap to add them to your own calendar.

Key dates — 2026–27 filing season

  1. Dec312026

    Year-end planning cut-off

    · Everyone

    Last day for retirement contributions, charitable gifts and equipment purchases to count for 2026.

  2. Jan152027

    Q4 2026 estimated tax payment

    · Self-employed

    Final estimated payment for tax year 2026.

  3. Feb12027

    W-2s and 1099-NEC forms due

    · Employers

    Send to employees and contractors and file with the IRS / SSA.

  4. Mar152027

    S-corporation and partnership returns

    · Businesses

    Forms 1120-S and 1065, or file an extension.

  5. Apr152027

    Individual tax returns + Q1 estimate

    · Individuals

    Form 1040 for 2026, IRA and HSA contributions, and the first 2027 estimated payment.

  6. Jun152027

    Q2 2027 estimated tax payment

    · Self-employed

  7. Sep152027

    Q3 estimate + extended business returns

    · Businesses

    Extended 1120-S and 1065 returns are due.

  8. Oct152027

    Extended individual returns due

    · Individuals

Dates can move for weekends, holidays and official extensions. Please confirm the dates that apply to you with us.