Key Tax Dates for 2025: What You Need to Know to Avoid Penalties

Staying on top of tax deadlines is more than just good practiceβitβs the key to avoiding unnecessary penalties, interest charges, and last-minute stress. Whether you’re managing a business or handling personal taxes, knowing the critical dates for 2024 will save you time, money, and headaches. In this guide, we break down the most important deadlines so you can stay organized, compliant, and focused on what matters most.
Important 2025 Tax Deadlines to Remember
Federal Tax Filing Deadlines:
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March 17th, 2025 – Standard deadline for filing Corporate (1120-S)/ Partnership (1065) tax returns.
All necessary tax documents must be gathered and submitted by February 15th, 2025
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April 15th, 2025– Standard deadline for filing Corporate (1120), Individual (1040), and Fiduciary (1041) tax returns.
All necessary tax documents must be gathered and submitted by March 15th, 2025.
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May 15th, 2025 β Standard deadline for filing Non-profit (990) tax returns.
All necessary tax documents must be gathered and submitted by April 15th, 2025.
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June 15th, 2025 – Standard deadline for filing Nonresident Alien Tax returns (1040-NR)
All necessary tax documents must be gathered and submitted by May 15th, 2025.
State Tax Filing Deadlines (if applicable):
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May 1st, 2025 – Standard deadline for filing Florida Corporate tax returns (F-1120).
All necessary tax documents must be gathered and submitted by March 15th, 2025
π November 3rd , 2025 – Extended deadline for filing Florida Corporate tax returns (F-1120).
Extension Filing Deadlines:
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On or before March 17th, 2025 – Federal S Corporations, Partnership extensions (7004)
π On or before April 15th, 2025 – Federal Individual extensions (4868), Corporation and Fiduciary extensions (7004)
π On or before May 1st, 2025 – Florida Corporate extensions (F-7004)On or before May 15th, 2025 β Federal Nonprofit extensions (8868)
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On or before June 15th, 2025– Federal Nonresident Alien extensions (4868)
To be eligible for the tax filing extension at least 70% of your tax liability must be paid. Otherwise, you will be subject to additional penalties and interest assessed by the IRS and corresponding state authorities, if applicable.
Federal Extended Tax Filing Deadlines:
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September 15th, 2025 – Extended deadline for filing Corporate (1120-S)/ Partnership tax returns (1065).
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October 1st, 2025 β Extended deadline for filing Fiduciary (1041) tax returns.
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October 15th, 2025 – Extended deadline for filing Corporate (1120), and Individual (1040).
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November 15th, 2025 β Extended deadline for filing Non-profit (990) tax returns.
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December 15th, 2025 – Extended deadline for filing Nonresident Alien Tax returns (1040-NR).
How to Stay on Top of Tax Deadlines
Now that you know the dates you canβt miss, below youβll find some advice to donβt miss a time.
- Create a Tax Calendar
- Add our Google Calendar to yours to set reminders a month and week before each deadline.
- Work with a CPA
- A trusted CPA can help you plan ahead, estimate tax payments accurately, and file on time.
- Organize Your Records Early
- Gather income statements, deductions, and other documents ahead of time to avoid stress during tax season.
What Happens If You Miss a Deadline?
Missing tax deadlines can result in:
- Late filing penalties: Up to 5% of unpaid taxes per month.
- Late payment penalties: 0.5% of your tax bill per month.
- Interest charges: Added daily until the taxes are paid.
The sooner you act, the lower the impact.
Need Help Staying Organized?
At RC CPA, we specialize in helping businesses and individuals stay tax-compliant all year long. Contact us to create a strategic plan and never miss a deadline again.