Important 2024 Tax Year Deadlines for Dental Practices in 2025

Tax season is approaching, and if you run a dental practice, keeping track of key tax deadlines is crucial to avoiding penalties and staying compliant with the IRS. At Whitt Accounting and Advisory, we specialize in helping dental professionals navigate the complexities of tax planning, bookkeeping, and financial management. To help you stay on top of your business taxes, we’ve outlined the most important tax dates for the 2024 tax year that dental practice owners need to know in 2025.

Below, you’ll find a comprehensive guide to the filing deadlines for dental practice taxes, including estimated tax payments, employer payroll taxes, and business tax returns.

Key Dental Practice Tax Deadlines for 2025

Date (2025)	Tax Forms & Payments Due	Description
January 15	Form 1040-ES	Q4 2024 Estimated Tax Payment due for self-employed dentists and practice owners paying quarterly taxes.
January 31	Form W-2, Form 1099-NEC	Employers must provide employees and independent contractors with wage and income statements. Essential for dental offices with associates, hygienists, and staff.
March 17 (since March 15 falls on a Saturday)	Form 1120-S, Form 1065	S Corporations & Partnerships: Tax returns due or file for an extension (Form 7004). Many dental practices operate as S Corporations, so this is a critical deadline.
April 15	Form 1120, Form 1040, Form 1040-ES	C Corporations & Sole Proprietors: Tax returns due. Also, Q1 2025 estimated taxes are due. Extensions must be filed (Form 7004 for C Corps, Form 4868 for individuals).
June 16 (since June 15 falls on a Sunday)	Form 1040-ES	Q2 2025 Estimated Tax Payment due.
September 16 (since September 15 falls on a Sunday)	Form 1040-ES	Q3 2025 Estimated Tax Payment due.
September 16	Form 1120-S, Form 1065	Extended deadline for S Corporation & Partnership tax returns, common for dental practices.
October 15	Form 1120, Form 1040	Extended deadline for C Corporation & individual tax returns.
January 15, 2026	Form 1040-ES	Q4 2025 Estimated Tax Payment due.

Additional Notes for Dental Practices

If you requested an extension, make sure to file your return by the extended due date. However, an extension to file does not mean an extension to pay – taxes owed must still be paid by the original deadline to avoid penalties and interest.
Payroll tax deposits are due throughout the year based on your deposit schedule (monthly or semi-weekly). Employers should refer to IRS Publication 15 for specific payroll tax deposit requirements. This is particularly important for dental practices with multiple employees.
Many dentists have business deductions related to equipment purchases, office lease payments, and dental supplies. Proper tax planning can help maximize deductions and reduce taxable income.
If your dental practice operates in multiple states, be sure to check state-specific tax filing requirements.

Stay Ahead of Tax Deadlines with Whitt Accounting

Keeping up with tax deadlines can be overwhelming, but proper planning and organization will help your dental practice stay compliant. At Whitt Accounting and Advisory, we specialize in outsourced accounting, tax planning, and CFO services tailored specifically for dental professionals. Whether you need help managing estimated tax payments, filing business tax returns, or maximizing tax deductions, we’re here to help.

For more information, visit the IRS Business Tax Center to access forms, deadlines, and other resources, or contact Whitt Accounting and Advisory for personalized tax guidance.