The 2025 tax year is here, and the 2024 tax season still has some important deadlines remaining. It’s time to start preparing your 2025 tax return, as well as keep up with important deadlines coming up for the 2024 tax year. There are many important dates to remember. Here’s every important tax filing deadline for filing your 2024 and 2025 taxes.
Note: This page contains important dates and deadlines for both the 2024 and 2025 tax years. The 2024 tax year is presented first, and the 2025 tax year is presented below, further down the page. For a list of all tax deadlines set by the IRS, refer to IRS Publication 509 for the 2024 tax year and IRS Publication 509 for the 2025 tax year (The 2025 tax year deadline dates listed are still in draft status, meaning that changes may still be made. This page will be kept updated with any changes).
2024 tax year
When are taxes due for the 2024 tax year?
The deadline for filing your 2024 taxes was the federal tax filing deadline, April 15, 2025. This was also the last day you could file for a six-month extension.
The federal tax filing deadline usually falls on April 15 of each year. If the date falls on a weekend or holiday, it gets pushed to the following weekday. In 2023, April 15 was a Saturday and the following Monday was a federal holiday, so it got pushed to April 18.
Different return methods have different deadlines
- If you filed a paper return: The IRS will consider your return on time if you mailed it by the due date of April 15, 2025. The return must have been correctly addressed with enough postage, and postmarked.
- If you filed an electronic return: The IRS will consider your return on time if you electronically submitted your return by April 15, 2025. Your local time zone will be used to determine the time and date it was submitted.
Also read: Tax Brackets and Federal Income Tax Rates
When are 2024 taxes due if I requested an extension?
If you requested a tax extension by filing Form 4868 by April 15, 2025, your extended return date is October 16, 2025. A tax deadline extension does not give you more time to pay your tax bill, it only gives you more time to file. The IRS expects you to pay your tax bill in full by April 15, 2025. Any amount owing after the deadline is subject to interest and penalties.
What if I don’t know how much I need to pay yet?
The IRS will accept an estimation of your owed tax payments. As long as you pay at least 90% of your actual tax liability, interest and penalties may be waived.
What happens if I miss the deadline?
If you miss the tax filing deadline and do not file for an extension, you’ll incur penalties and interest. The late-filing penalty is usually around 5% of the amount owed for every month that it is late, up to a maximum of 25% of your tax bill. On top of the late-filing penalty, the amount owed will also accrue interest. You may also miss out on tax refunds owed to you, if you any year’s tax return is not filed for longer than 3 years.
2024 tax year deadlines for individuals
| Deadlines | What’s Due? | Details |
|---|---|---|
| Dec 31, 2024 | Deadline to file an election for Solo 401k | If you want to make a contribution to your Solo 401k for the 2022 tax year, you must file an election by December 31, 2024. |
| Jan 16, 2025 | Deadline for Q4 estimated tax payment | If you’re self-employed and make quarterly estimated tax payments, this is the due date for your 2024 final quarterly payment using Form 1040-ES. |
| Jan 31, 2025 | Deadline for employers to send out W-2 forms | Employers are required to send out W-2 forms to employees by January 31. |
| Jan 31, 2025 | Deadline for several 1099 forms | The 1099 form and several different versions of the form must be sent by January 31. |
| Feb 15, 2025 | Deadline to reclaim exemptions from withholding | If you filed a Form W-4 last year, and would like to file an exemption request, the deadline is February 15. |
| Apr 3, 2025 | Deadline to take first RMD payment | If you turned 73 years old in 2024, you would need to take your first required minimum distribution (RMD) by April 3, this year. |
| Apr 15, 2025 | Federal tax filing deadline | Individuals must file Form 1040 or Form 1040-SR (for seniors) and pay any taxes due by the federal tax filing deadline. |
| Apr 15, 2025 | Deadline to make Solo 401k contributions | After filing your Solo 401k election by December 31 of last year, you must make the contribution into your account by April 18. |
| Apr 15, 2025 | Deadline to file Form 4868 and request an extension | The federal tax filing deadline is also the last day to file Form 4868. If you cannot file by this date, you must file for an extension instead, which would give you an additional 6 months – until October 16, 2025. |
| Apr 15, 2025 | Deadline to make IRA and HSA contributions | The federal tax filing deadline is the last day you can make contributions to your IRA or HSA for 2024. |
| Apr 15, 2025 | Q1 2025 estimated tax payments due | If you make estimated tax payments, April 18 is the deadline for making your Q1 estimated tax payment using Form 1040-ES. |
| Jun 15, 2025 | Q2 2025 estimated tax payments due | If you make estimated tax payments, June 15 is the deadline for making your Q2 estimated tax payment using Form 1040-ES. |
| Sep 15, 2023 | Q3 2025 estimated tax payments due | If you make estimated tax payments, September 15 is the deadline for making your Q3 estimated tax payment using Form 1040-ES. |
| Oct 16, 2025 | Deadline to file extended tax returns | If you filed for an extension for your 2024 tax return, the extended deadline date is October 16. |
| Dec 31, 2025 | Deadline to take your regular RMD | If you’re over 73 years old, after your first RMD, all future RMD payments must be taken by December 31 of each year. If you turn 73 years of age in 2024, you have until April 1, 2025 to take your first RMD. |
| Jan 15, 2026 | Q4 2025 estimated tax payments due | If you make estimated tax payments, January 15, 2025 is the deadline for making your final Q4 estimated tax payment for 2024 using Form 1040-ES. |
2024 tax year deadlines for businesses
| Deadlines | What’s Due? | Details |
|---|---|---|
| Dec 31, 2024 | Deadline to file an election for Solo 401k | If you want to make a contribution to your Solo 401k for the 2024 tax year, you must file an election by December 31, 2024. |
| Jan 16, 2025 | Deadline for Q4 estimated tax payment | If your business makes quarterly estimated tax payments, this is the due date for your 2024 final quarterly payment using Form 1040-ES. |
| Jan 31, 2025 | Deadline for employers to send out W-2 forms | Employers are required to send out W-2 forms to employees by January 31. |
| Jan 31, 2025 | Deadline for several 1099 forms | The 1099 form and several different versions of the form must be sent by January 31. |
| Mar 15, 2025 | Taxes due for partnerships, multi-member LLCs, and S-corps | If your business structure is a partnership, multi-member LLC, or S-corp, you must file Form 1065 or 1120S by March 15 if you use the calendar year. If your business uses a fiscal year, your return is due by the 15th day of the third month after the end of your fiscal year. |
| Apr 15, 2025 | Taxes due for C-corps | If your business structure is a C-corp, you must file Form 1120 by April 15 if you use the calendar year. If your business uses a fiscal year, your return is due by the 15th day of the third month after the end of your fiscal year. |
| Apr 15, 2025 | Q1 2023 estimated tax payments due | If your business makes estimated tax payments, April 15 is the deadline for making your Q1 estimated tax payment using Form 1040-ES. |
| Jun 15, 2025 | Q2 2023 estimated tax payments due | If your business makes estimated tax payments, June 15 is the deadline for making your Q2 estimated tax payment using Form 1040-ES. |
| Sep 15, 2025 | Q3 2023 estimated tax payments due | If your business makes estimated tax payments, September 15 is the deadline for making your Q3 estimated tax payment using Form 1040-ES. |
| Sep 15, 2025 | Deadline to file extended tax returns (for partnerships and S-corps) | If your business structure is a partnership or S-corp, and you filed for an extension for your 2024 tax return, the extended deadline date is September 15. |
| Oct 16, 2025 | Deadline to file extended contribution deadline for SEP IRA, SIMPLE IRA, and Solo 401k | If you filed for a six-month extension for your Solo 401k contribution deadline, this is the last day to make your final contribution to these plans. |
| Oct 16, 2025 | Deadline to file extended tax returns (for C-corps) | If your business structure is a C-corp, and you filed for an extension for your 2024 tax return, the extended deadline date is October 16. |
| Dec 31, 2025 | Deadline to file your Solo 401k election | If you want to make contributions to your Solo 401k for 2024, you would need to file an election by December 31. |
| Jan 15, 2026 | Q4 2024 estimated tax payments due | If your business makes estimated tax payments, January 15, 2026 is the deadline for making your final Q4 estimated tax payment for 2025. |
2025 tax year
When are taxes due for the 2025 tax year?
For tax filings for the 2025 tax year, the federal tax filing deadline is April 15, 2026. Residents of Maine and Massachusetts have until April 17, 2026 due to state holidays. This deadline is also the last day to file for an extension.
- If you file a paper return: The IRS will consider your return on time if you mail it by the due date of April 15, 2026. The return must be correctly addressed with enough postage, and postmarked.
- If you file an electronic return: The IRS will consider your return on time if you electronically submit your return by April 15, 2026. Your local time zone will be used to determine the time and date it is submitted.
When are 2025 taxes due if I requested an extension?
If you request a tax extension by filing Form 4868 by April 15, 2025, your extended return date will be October 15, 2025. A tax deadline extension does not give you more time to pay your tax bill, it only gives you more time to file. The IRS expects you to pay your tax bill in full by April 15, 2025. Any amount owing after the deadline is subject to interest and penalties.
2025 tax year deadlines for individuals
| Deadlines | What’s Due? | Details |
|---|---|---|
| Dec 31, 2025 | Deadline to file an election for Solo 401k | If you want to make a contribution to your Solo 401k for the 2025 tax year, you must open your account (if you don’t already have one) and file an election by December 31, 2025. |
| Jan 16, 2026 | Deadline for Q4 estimated tax payment | If you’re self-employed and make quarterly estimated tax payments, this is the due date for your 2025 final quarterly payment. Use Form 1040-ES. |
| Jan 31, 2026 | Deadline for employers to send out W-2 forms | Employers are required to send out W-2 forms to employees by January 31. |
| Jan 31, 2026 | Deadline for several 1099 forms | The 1099 form and several different versions of the form must be sent by January 31. |
| Feb 15, 2026 | Deadline to reclaim exemptions from withholding | If you filed a Form W-4 last year, and would like to file an exemption request, you must file a new Form W-4 by February 15 to continue your exemption for another year. |
| Apr 1, 2026 | Deadline to take first RMD payment | If you turned 73 years old in 2025, you would need to take your first required minimum distribution (RMD) by April 1, this year. |
| Apr 15, 2026 | Federal tax filing deadline | Individuals must file Form 1040 or Form 1040-SR (for seniors) and pay any taxes due by the federal tax filing deadline. |
| Apr 15, 2026 | Deadline to make Solo 401k contributions | After filing your election by December 31 of last year, you must make the contribution into your account by April 18. |
| Apr 15, 2026 | Deadline to file Form 4868 and request an extension | The federal tax filing deadline is also the last day to file Form 4868. If you cannot file by this date, you must file for an extension instead, which would give you an additional 6 months – until October 15, 2026. |
| Apr 15, 2026 | Deadline to make IRA and HSA contributions | The federal tax filing deadline is the last day you can make contributions to your IRA or HSA for 2025. |
| Apr 15, 2026 | Q1 2024 estimated tax payments due | If you make estimated tax payments, April 15 is the deadline for making your Q1 estimated tax payment using Form 1040-ES. |
| Jun 17, 2026 | Q2 2024 estimated tax payments due | If you make estimated tax payments, June 17 is the deadline for making your Q2 estimated tax payment using Form 1040-ES. |
| Sep 16, 2026 | Q3 2024 estimated tax payments due | If you make estimated tax payments, September 16 is the deadline for making your Q3 estimated tax payment using Form 1040-ES. |
| Oct 15, 2026 | Deadline to file extended tax returns | If you filed for an extension to return your Form 1040 or Form 1040-SR (for seniors) for your 2025 tax return, the extended deadline date is October 15, 2026. |
| Dec 31, 2026 | Deadline to take your regular RMD | If you’re over 73 years old, after your first RMD, all future RMD payments must be taken by December 31 of each year. If you turn 73 years of age in 2025, you have until April 1, 2026 to take your first RMD. |
| Jan 15, 2027 | Q4 2024 estimated tax payments due | If you make estimated tax payments, January 15, 2027 is the deadline for making your final Q4 estimated tax payment for 2026. |
2025 tax year deadlines for businesses
| Deadlines | What’s Due? | Details |
|---|---|---|
| Dec 31, 2025 | Deadline to file an election for Solo 401k | If you want to make a contribution to your Solo 401k for the 2025 tax year, you must open your Solo 401k plan (if you don’t already have one) and file an election by December 31, 2025. |
| Jan 16, 2026 | Deadline for Q4 estimated tax payment | If your business makes quarterly estimated tax payments, this is the due date for your 2025 final quarterly payment using Form 1040-ES. |
| Jan 31, 2026 | Deadline for employers to send out W-2 forms | Employers are required to send out W-2 forms to employees by January 31. |
| Jan 31, 2026 | Deadline for several 1099 forms | The 1099 form and several different versions of the form must be sent by January 31. |
| Mar 15, 2026 | Taxes due for partnerships, multi-member LLCs, and S-corps | If your business structure is a partnership, multi-member LLC, or S-corp, you must file Form 1065 or 1120S by March 15 if you use the calendar year. If your business uses a fiscal year, your return is due by the 15th day of the third month after the end of your fiscal year. |
| Apr 15, 2026 | Taxes due for C-corps | If your business structure is a C-corp, you must file Form 1120 by April 15 if you use the calendar year. If your business uses a fiscal year, your return is due by the 15th day of the third month after the end of your fiscal year. |
| Apr 15, 2026 | Q1 2025 estimated tax payments due | If your business makes estimated tax payments, April 15 is the deadline for making your Q1 estimated tax payment using Form 1040-ES. |
| Jun 17, 2026 | Q2 2025 estimated tax payments due | If your business makes estimated tax payments, June 17 is the deadline for making your Q2 estimated tax payment using Form 1040-ES. |
| Sep 16, 2026 | Q3 2025 estimated tax payments due | If your business makes estimated tax payments, September 16 is the deadline for making your Q3 estimated tax payment using Form 1040-ES. |
| Sep 16, 2026 | Deadline to file extended tax returns (for partnerships and S-corps) | If your business structure is a partnership or S-corp, and you filed for an extension for your 2024 tax return, the extended deadline date is September 16. |
| Oct 15, 2026 | Deadline to file extended contribution deadline for SEP IRA, SIMPLE IRA, and Solo 401k | If you filed for a six-month extension for your Solo 401k contribution deadline, this is the last day to make your final contribution to these plans. |
| Oct 15, 2026 | Deadline to file extended tax returns (for C-corps) | If your business structure is a C-corp, and you filed for an extension for your 2024 tax return, the extended deadline date is October 15. |
| Dec 31, 2026 | Deadline to file your Solo 401k election | If you want to make contributions to your Solo 401k for 2026, you would need to file an election by December 31. |
| Jan 15, 2027 | Q4 2025 estimated tax payments due | If your business makes estimated tax payments, January 15, 2027 is the deadline for making your final Q4 estimated tax payment for 2026 using Form 1040-ES. |