January 10

Individuals: Reporting January tip income, $20 or more, to employers (Form 4070).

January 15

Individuals: Paying the final installment of 2024 estimated taxes, if not paying income tax through withholding (Form 1040-ES).

January 31

Individuals: Filing a 2024 income tax return (Form 1040 or Form 1040-SR) and paying tax due, to avoid penalties for underpaying the January 16 installment of estimated taxes.

Businesses: Providing Form 1098, Form 1099-MISC (except for those that have a February 15 deadline), Form 1099-NEC and Form W-2G to recipients.

Employers: Providing 2024 Form W-2 to employees. Reporting income tax withholding and FICA taxes for fourth quarter 2024 (Form 941). Filing an annual return of federal unemployment taxes (Form 940) and paying any tax due.

Employers: Filing 2024 Form W-2 (Copy A) and transmittal Form W-3 with the Social Security Administration.