2023 Q3 tax calendar: Key deadlines for businesses and other employers

Here are some of the key tax-related deadlines affecting businesses and other employers during the third quarter of 2023.

Keep in mind that this list isn’t all-inclusive, so there may be additional deadlines that apply to you.

Contact us  to ensure you’re meeting all applicable deadlines and to learn more about the filing requirements.

1. July 31 Report income tax withholding and FICA taxes for second quarter 2023 (Form 941) and pay any tax due. (See the exception below, under “August 10.”) File a 2022 calendar-year retirement plan report (Form 5500 or Form 5500-EZ) or request an extension.
2. August 10 Report income tax withholding and FICA taxes for second quarter 2023 (Form 941), if you deposited on time and in full all of the associated taxes due.
3. September 15 If a calendar-year C corporation, pay the third installment of 2023 estimated income taxes.
4. If a calendar-year S corporation or partnership that filed an automatic six-month extension: File a 2022 income tax return (Form 1120-S, Form 1065 or Form 1065-B) and pay any tax, interest and penalties due.
5. Make contributions for 2022 to certain employer-sponsored retirement plans.