Important Upcoming Tax Deadlines for Small Businesses in 2025
As a small business owner, staying on top of tax deadlines is crucial to avoiding penalties and keeping your finances in order. With 2025 well underway, now is the perfect time to mark your calendar for key tax due dates. Here’s a breakdown of the most important deadlines to keep in mind:
Quarterly Estimated Tax Payments
If your business is required to make estimated tax payments, here are the due dates for 2025:
January 16, 2025 – Q4 2024 estimated tax payment due
April 15, 2025 – Q1 2025 estimated tax payment due
June 16, 2025 – Q2 2025 estimated tax payment due
September 16, 2025 – Q3 2025 estimated tax payment due
For most businesses, these estimated payments apply if you expect to owe at least $1,000 in taxes when filing your return.
Federal Tax Return Filing Deadlines
Depending on your business structure, your tax filing deadlines will vary:
March 17, 2025 – S Corporations (Form 1120-S) and Partnerships (Form 1065)
April 15, 2025 – C Corporations (Form 1120) and Sole Proprietors (Schedule C on Form 1040)
If you need more time, you can file for an extension, which gives you until:
September 15, 2025 – Extended deadline for S Corps and Partnerships
October 15, 2025 – Extended deadline for C Corps and Sole Proprietors
Payroll & Employment Tax Deadlines
Employers must also stay on top of payroll tax filings:
January 31, 2025 – Deadline to issue W-2s to employees and 1099-NEC forms to contractors
January 31, 2025 – Form 941 (Q4 2024) and Form 940 (annual FUTA tax return) due
April 30, July 31, October 31, 2025 – Quarterly Form 941 filings for payroll taxes
State Tax Deadlines
In addition to federal deadlines, be sure to check your state’s tax filing and payment deadlines, as they may differ from the IRS schedule.
Plan Ahead & Stay Compliant
To avoid last-minute stress and potential penalties, consider:
✅ Using accounting software like QuickBooks to track your finances
✅ Working with a tax professional to ensure accuracy
✅ Setting up reminders for key due dates
By staying organized and proactive, you can make tax season much easier and focus on growing your business. Need help getting your books in order before tax time? Let’s chat!
