How do state tax extensions work?
If you need more time to file your state tax return, you can usually request a state tax extension. This gives you extra time to file your return, but it doesn’t give you more time to pay taxes you owe.
If you expect to owe state taxes, pay by April 15, 2026 to avoid late-payment penalties and interest.
State extension rules aren’t all the same. Some states accept your federal tax extension as a state extension. In many states, filing a federal extension with the IRS will also give you more time to file your state return.
Other states require a separate state extension request, even if you already filed a federal extension.
For the 2025 tax year, here are the key dates to know:
April 15, 2026: Deadline to pay most state taxes owed
October 15, 2026: Typical extension deadline to file your return (varies by state)
Below is a list of states with links to their specific extension information.
States with no personal income tax (no extension required)
If you live in one of these states, you don’t need to file a state tax extension because the state doesn’t require a personal income tax return.
Alaska
Florida
Nevada
New Hampshire
South Dakota
Tennessee
Texas
Washington
Wyoming
If you live in one of these states, filing a federal extension is enough since there’s no state income tax return to extend.
States that don’t require a separate state extension
In the following states, you typically don’t need to file a separate state extension form. Some states accept a federal extension filed with the IRS, while others automatically grant more time to file. In most cases, you’ll still need to pay any state taxes owed by the original deadline to avoid penalties.
Requirements can vary by state, so it’s important to check whether a federal extension is accepted or if the extension is automatic. For full details, visit your state’s tax website (see links below).
Important:
Even in these states, the federal extension only gives you more time to file. You still need to pay any state taxes owed by April 15, 2026 to avoid penalties and interest.
States that require a separate state extension
These states typically require you to submit a separate state extension request or form, even if you already filed a federal extension.
If you live in one of these states, check your state tax agency’s extension form or online filing system before the deadline.
How to file a state tax extension
The process usually looks like this:
Estimate your state tax liability
Pay any taxes owed by April 15, 2026
File a federal extension (IRS Form 4868) if you need more time to file your federal return
Check whether your state accepts a federal extension or requires a separate state form
Submit a state extension form or payment if your state requires it
File your state return by October 15, 2026
Helpful tip for taxpayers
If you’re not sure whether your state requires a separate extension, a good rule of thumb is:
Start with the federal extension (IRS Form 4868)
Then check whether your state automatically accepts that extension or requires a separate form
This helps ensure you stay compliant with both federal and state tax deadlines.
This content is provided for informational purposes only and should not be construed as tax, legal, financial, accounting, or other advice. Rules and regulations vary by location and are subject to change, so please consult with an expert if you need advice specific to you.
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