--- title: "2023 Q4 Tax Calendar: Key Deadlines for Businesses and Other Employers" description: Machen McChesney provides business owners with the fourth quarter 2023 tax filing deadlines. image: https://info.machen.cpa/hubfs/09_25_23_1711856200_SBTB_560x292-1.jpeg --- [Family of Services](http://machenmcchesney.com/about-us/family-of-companies/)  |  [CPA & Business Advisory](http://machenmcchesney.com)  |  [Payroll, HR & Benefits](http://focuspaysolutions.com/)  |  [Wealth Management](http://machenmcchesney.com/services/financial-planning-and-wealth-mangement-services/) Auburn-Opelika (334) 887-7022 | Montgomery (334) 244-8900 [![mm-cobrand-fd-blues](https://info.machen.cpa/hs-fs/hubfs/mm-cobrand-fd-blues.png?width=279&height=100&name=mm-cobrand-fd-blues.png)](http://machenmcchesney.com) Search this site on Google Search Google Search this site on Google Search Google - [Client Portal](https://machenmcchesney.sharefile.com/Authentication/Login) - [1040 Electronic Organizer](https://www.my1040data.com/account/login/HT7902990) - 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Pagan, CPA](https://info.machen.cpa/blog/author/jessica-l-pagan-cpa) on Oct 18, 2023, 7:54:00 AM - [Tweet](https://twitter.com/share) ![09\_25\_23\_1711856200\_SBTB\_560x292-1](https://info.machen.cpa/hs-fs/hubfs/09_25_23_1711856200_SBTB_560x292-1.jpeg?width=1024&height=319&name=09_25_23_1711856200_SBTB_560x292-1.jpeg)Here are some key tax-related deadlines affecting businesses and other employers during the fourth 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. Note: Certain tax-filing and tax-payment deadlines may be postponed for taxpayers who reside in or have businesses in federally declared disaster areas. **Monday, October 2** - The last day you can initially set up a SIMPLE IRA plan provided you (or any predecessor employer) didn’t previously maintain a SIMPLE IRA plan. If you’re a new employer that comes into existence after October 1 of the year, you can establish a SIMPLE IRA plan as soon as administratively feasible after your business comes into existence. **Monday, October 16** - If a calendar-year C corporation that filed an automatic six-month extension: - File a 2022 income tax return (Form 1120) and pay any tax, interest, and penalties due. - Make contributions for 2022 to certain employer-sponsored retirement plans. - Establish and contribute to a SEP for 2022 if an automatic six-month extension was filed. **Tuesday, October 31** - Report income tax withholding and FICA taxes for the third quarter of 2023 (Form 941) and pay any tax due. (See exception below under “November 13.”) **Monday, November 13** - Report income tax withholding and FICA taxes for the third quarter of 2023 (Form 941) if you deposited on time (and in full) all of the associated taxes due. **Friday, December 15** - If a calendar-year C corporation pays the fourth installment of 2023 estimated income taxes. **For more information about the above due dates or** **other [business tax services](http://machenmcchesney.com/services/taxation/corporate-tax-planning-and-preparation?__hstc=31761121.4627eaa870e9cc9db860037b5e562f38.1693313036726.1697630459776.1697632629383.117&__hssc=31761121.8.1697632629383&__hsfp=2439428725), contact Jessica L. Pagan, CPA, by calling (334) 887-7022 or by leaving us a message below.** Topics: [Business Tax](https://info.machen.cpa/blog/topic/business-tax) Search this site on Google Search Google ### Recent Posts ### Subscribe to Blog ### Posts by Category - [Business Tax (356)](https://info.machen.cpa/blog/topic/business-tax) - [Business Advisory (238)](https://info.machen.cpa/blog/topic/business-advisory) - [Payroll, HR & Benefits (124)](https://info.machen.cpa/blog/topic/payroll-hr-benefits) - [Audit & Assurance (113)](https://info.machen.cpa/blog/topic/audit-assurance) - [Accounting & Outsourcing (81)](https://info.machen.cpa/blog/topic/accounting-outsourcing) - [Individual Tax (75)](https://info.machen.cpa/blog/topic/individual-tax) - [Tax Planning (33)](https://info.machen.cpa/blog/topic/tax-planning) - [Tax Updates (25)](https://info.machen.cpa/blog/topic/tax-updates) - [Retirement & Wealth Management Planning (18)](https://info.machen.cpa/blog/topic/retirement-wealth-management-planning) - [Taxation (15)](https://info.machen.cpa/blog/topic/taxation) - [Alerts (13)](https://info.machen.cpa/blog/topic/alerts) - [Business Valuation (11)](https://info.machen.cpa/blog/topic/business-valuation) - [News & Events (11)](https://info.machen.cpa/blog/topic/news-events) - [Tax News (11)](https://info.machen.cpa/blog/topic/tax-news) - [Individual Tax Planning (10)](https://info.machen.cpa/blog/topic/individual-tax-planning) - [Not For Profit (10)](https://info.machen.cpa/blog/topic/not-for-profit) - [Retirement Planning (9)](https://info.machen.cpa/blog/topic/retirement-planning) - [Estate Planning (8)](https://info.machen.cpa/blog/topic/estate-planning) - [Manufacturing Industry Insights (7)](https://info.machen.cpa/blog/topic/manufacturing-industry-insights) - [Individuals (1)](https://info.machen.cpa/blog/topic/individuals) - [Insider (1)](https://info.machen.cpa/blog/topic/insider) - [Professional Standard News (1)](https://info.machen.cpa/blog/topic/professional-standard-news) see all [![Returning\_Value](https://info.machen.cpa/hs-fs/file-2504250850-jpg/Machen-Blog-Image/Returning_Value.jpg)](http://machenmcchesney.com/about-us/mission-and-values/) - [![AICPA](https://machenmcchesney.com/img/logos/aicpa.jpg)](https://www.aicpa-cima.com/) - [![NACVA](https://machenmcchesney.com/img/logos/nacva.jpg)](http://www.nacva.com/) - ![2026 INSIDE Public Accounting Top 400](https://machenmcchesney.com/img/2026-ipa-top-400.jpg) - ![2026 Best of Auburn-Opelika](https://machenmcchesney.com/img/2026-best-of-auburn-opelika.jpg) - [![2025 Best of OA](https://machenmcchesney.com/img/2025-best-of-oa.jpg)](https://oanow.com/exclusive/readerschoice/ballot-2025/) - ![2026 Best of OA Winner](https://machenmcchesney.com/img/2026-best-of-oa-winner.jpg) - [![2025 Accounting Today Regional Leaders](https://machenmcchesney.com/img/2025-accounting-today-regional-leaders.jpg)](https://www.accountingtoday.com/) - [![ClearlyRated Best of Accounting](https://machenmcchesney.com/img/2024-best-of-accounting.jpg)](https://www.clearlyrated.com/accounting) - [![ClearlyRated Best of Accounting Employee](https://machenmcchesney.com/img/2024-best-of-accounting-employee.jpg)](https://www.clearlyrated.com/accounting) 1820 East University Drive, Auburn, AL 36830 | Tel: (334) 887-7022 | Fax: (334) 887-7221 1761 Taliaferro Trail, Montgomery, AL 36117 | Tel: (334) 244-8900 | Fax: (334) 364-0927 † This is not a CPA firm. \* Assurance, attest, and audit services provided by Frazier & Deeter, LLC. “Frazier & Deeter” is the brand name under which Frazier & Deeter, LLC\* and Frazier & Deeter Advisory, LLC† and its subsidiary entities provide professional services. 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