15 –

Fourth quarter 2025 estimated tax due. Use Form 1040-ES.

2 –

Deadline for employers to provide copies of Forms W-2 and 1099 for 2025 to employees.

17 –

If you claimed exemption from income tax withholding last year on the Form W-4 you gave your employer, you must file a new Form W-4 by February 15 to continue your exemption for another year.

2 –

Deadline for farmers and fishermen who have a balance due on their taxes to file their 2025 individual income tax returns and pay the balance due without penalties.

16 –

Deadline for 2025 S corporation tax returns (Form 1120-S) or to request an extension using Form 7004.

16 –

Deadline to file 2025 partnership tax returns (Form 1065) or to request an automatic extension (Form 7004).

15 –

Deadline to file 2025 individual income tax returns (Form 1040) and any taxes owed, or to file for an automatic 6-month extension.

15 –

Last day to contribute to a traditional IRA, Roth IRA, or SEP-IRA for the 2025 tax year.

15 –

First quarter 2026 estimated tax due. Use Form 1040-ES.

15 –

Deadline to file 2025 trust tax returns (Form 1041) or to request an automatic extension.

15 –

Deadline to file 2025 corporate tax returns (Form 1120) or to request an automatic extension (Form 7004).

15 –

Deadline for U.S. citizens living abroad to file individual tax returns and pay any tax, interest, and penalties due, or to request a 4-month extension (Form 4868).

15 –

Second quarter 2026 estimated tax due. Use Form 1040-ES.

15 –

Third quarter 2026 estimated tax due. Use Form 1040-ES.

15 –

Final deadline to file 2025 partnership tax return if you were given a 6-month extension.

15 –

Final deadline to file 2025 S corporation tax return if you were given a 6-month extension.

1 –

Deadline for existing employers to establish a SIMPLE IRA plan.

15 –

If you were given a 6-month extension to file your income tax return for 2025, file Form 1040 and pay any tax, interest, and penalties due.

15 –

Final deadline to file 2025 corporate tax return if were given a 6-month extension.