What is the 2025 Tax Filing Deadline?
"When is the last day to file taxes in 2025?" comes to mind. For the majority of people, it is April 15, 2025. However, the IRS automatically moves the due date to the following business day if April 15 falls on a weekend or federal holiday. Do you need additional time to gather your paperwork? You have until October 15, 2025, to file your return if you use IRS Form 4868 to request a filing extension. Remember that this extension is only valid for filing, not for payment. You still have until April 15 to pay whatever taxes you owe to avoid interest and late fees.
Depending on the structure and Tax Returns, firms have different tax deadlines. In general:
- S corporations, and partnerships that use the calendar year have until March 17, 2025, to file.
- C corporations, unless they have a different fiscal year, usually file by April 15, 2025.
2025 Tax Deadlines (For the 2024 Tax Returns)
Here’s a month-by-month breakdown of all the major tax dates you need to mark on your calendar in 2025:
January 15, 2025 – Final Estimated Tax Payment for 2024
If you’re self-employed or earn income without withholding (like freelance work or investments), this is your last chance to avoid underpayment penalties.
January 27, 2025 – Tax Filing Season Opens
The IRS starts accepting 2024 tax returns. Filing early can help you get your refund faster and resolve any issues quickly.
January 31, 2025 – W-2 and 1099 Forms Due
Employers must send out W-2s. Businesses must issue 1099s (NEC, MISC, K, etc.) to freelancers and contractors who earned $600+.
February 18, 2025 – W-4 Exemption Renewal
If you claimed exemption from withholding last year, submit a new Form W-4 to keep that status.
April 1, 2025 – RMD Deadline for New 73-Year-Olds
If you turned 73 in 2024, you must take your first Required Minimum Distribution from retirement accounts by this date.
April 15, 2025 – Tax Day
- File your 2024 tax return (Form 1040)
- Pay any taxes due
- Request an extension (Form 4868)
- Make 2024 IRA and HSA contributions
- Pay Q1 estimated taxes for 2025
June 16, 2025 – Q2 Estimated Tax Payment Due
Covers income earned in April and May 2025.
September 15, 2025 – Q3 Estimated Tax Payment Due
For income earned from June through August.
October 15, 2025 – Extended Filing Deadline
If you requested an extension in April, this is your final day to file your 2024 return.
December 31, 2025 – Final RMD Deadline
All retirees age 73+ must take their 2025 RMD by this date to avoid hefty penalties (up to 25%).
January 15, 2026 – Final Q4 Estimated Tax Payment for 2025
2025 Business Tax Deadlines
- January 27, 2025 – Start of Business Filing Season
- January 31, 2025 – W-2 and 1099 Filing Deadlines for Businesses
- March 17, 2025 – Partnerships and S-Corp Returns Due (File Form 1065 or 1120S, unless you’ve requested an extension)
- April 15, 2025 – C-Corporation Returns Due (File Form 1120 for calendar-year corporations)
- September 15, 2025 – Extended Deadline for Partnerships and S-Corps
- October 15, 2025 – Extended Deadline for C-Corps
What If You Miss a Tax Deadline?
If You’re Due a Refund
You have three years from the original filing deadline to claim it. After that, the IRS keeps your money.
If You Owe Taxes
Failing to file or pay on time triggers penalties immediately, starting the day after the deadline. File and pay as much as you can to reduce interest and fees.
If You Miss an Estimated Payment
Pay as soon as possible. To avoid underpayment penalties, aim to pay:
- 90% of your current year’s tax liability, or
- 100% (or 110% for high earners) of last year’s taxes
Can’t Pay Right Away?
Still file on time. The penalty for not filing is worse than the penalty for not paying. The IRS offers payment plans, so get in touch and set one up.
Filing Tips
- Fastest Way to File: Use e-file with direct deposit. Most refunds arrive in about 21 days.
- Need More Time? File Form 4868 to get an extension until October 15 — but remember, payments are still due April 15.
- Correcting a Return: Use Form 1040-X if you made a mistake on a previous return. File within 3 years of the original deadline or 2 years from the date you paid.
Final Thoughts: Don’t Miss a Deadline
Whether you’re filing as an individual or business, staying on top of tax deadlines in 2025 will save you money, time, and stress. Set calendar reminders, file early if possible, and don’t hesitate to ask for help if needed.
Need Help Filing?
At Milta, we offer:
- Full-service tax filing by experienced professionals who understand your needs
- Step-by-step support if you prefer to file on your own, with guidance to make sure everything is accurate and optimized
Start today and file with confidence.