2025 Business Tax Deadlines: Key Dates for QuickBooks Users
A practical calendar of 2025 federal business tax deadlines that matter when closing the books in QuickBooks, including estimated payments and pass-through
Staying ahead of tax deadlines is one of the most stressful parts of running a small business. If you manage your books in QuickBooks, knowing exactly when payments are due helps you finalize reports, reconcile accounts, and avoid late penalties.
Here is a practical guide to the standard 2025 federal business tax deadlines you need to track this year.
First Quarter Estimated Taxes
For sole proprietors, partners, S corporation shareholders, and LLCs treated as pass-through entities, the IRS requires quarterly estimated tax payments if you expect to owe at least $1,000 when you file your return.
The first payment for the 2024 tax year is due January 15, 2025. After that, the remaining quarterly deadlines for the 2025 tax year fall on:
- April 15, 2025 (Q1)
- June 16, 2025 (Q2)
- September 15, 2025 (Q3)
- January 15, 2026 (Q4)
S Corporation and Partnership Returns
Pass-through entities operate on their own filing schedule. If your business is structured as a partnership or an S corporation, your 2024 tax returns are due before the standard April personal filing deadline.
- March 17, 2025: Deadlines for S Corporation (Form 1120-S) and Partnership (Form 1065) returns. Because March 15 falls on a weekend, the due date shifts to the following Monday.
- September 15, 2025: The extended filing deadline for both S corporations and partnerships.
C Corporation Returns
Traditional C corporations file using Form 1120. For calendar-year C corporations, the standard filing deadline for the 2024 tax year is April 15, 2025. If your business operates on a fiscal year rather than a calendar year, your return is due on the 15th day of the fourth month following the close of your tax year.
Employer Payroll Taxes
If you run payroll through QuickBooks, you are already familiar with the ongoing deposit schedule for federal income tax withholdings and FICA. These deposits are typically made on a semi-weekly or monthly basis depending on your total liability.
Additionally, businesses must file quarterly federal employment tax returns (Form 941). The 2025 due dates for these quarterly payroll summaries are:
- April 30, 2025 (Q1)
- July 31, 2025 (Q2)
- October 31, 2025 (Q3)
- January 31, 2026 (Q4)
Preparing Your QuickBooks File
As a filing deadline approaches, run standard reports—like the Profit and Loss statement and Balance Sheet—well before the due date. This gives you time to identify missing vendor invoices, uncategorized transactions, or bank feeds that need to be reconciled. If your file contains several years of uncleaned data, you may need to repair or recover damaged QuickBooks company data before you can trust the numbers on your reports.
To make next year’s filing easier, set up recurring calendar reminders in QuickBooks for these IRS due dates, and review your estimated tax liability at the end of every quarter rather than waiting until the deadline arrives.