2025 Form CT-1040 EXT
Application for Extension of Time to File Connecticut Income Tax Return for Individuals
Download or Print 2025 Connecticut Form CT-1040 EXT
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About Connecticut Form CT-1040 EXT
Connecticut Form CT-1040 EXT is used to request an extension of time to file a Connecticut individual income tax return. The form may apply whether you file as a resident with Form CT-1040 or as a nonresident or part-year resident with Form CT-1040NR/PY.
Form CT-1040 EXT extends the time to file your Connecticut income tax return, but it does not extend the time to pay tax due. Use the Form CT-1040 instructions or Form CT-1040NR/PY instructions to determine whether you need to file an extension request and how to make any required payment.
Connecticut Form CT-1040 EXT PDF Files by Year
Click any of the Connecticut Form CT-1040 EXT PDF links above to download, save, view, and print the file for the corresponding year. These free PDF files are unaltered and are sourced directly from the publisher.
Related Connecticut Extension and Payment Forms
Need to download more state income tax forms? View the 2025 Connecticut other income tax forms list.
| Form Code | Form Name |
|---|---|
| Form CT-1040ES | Connecticut Estimated Income Tax Payment Coupon for Individuals |
| Form CT-1040EFW | Connecticut Electronic Withdrawal Payment Record |
| Form CT-1040V | Connecticut Electronic Filing Payment Voucher |
| Form CT-1127 | Application for Extension of Time for Payment of Income Tax |
Frequently Asked Questions (FAQ)
Here are answers to common questions about downloading, printing, completing, and filing 2025 Connecticut Form CT-1040 EXT.
When is 2025 Connecticut Form CT-1040 EXT due?
For most 2025 Connecticut individual income tax returns, Form CT-1040 EXT must be filed on or before April 15, 2026. The extension request should be submitted by the original return due date, and any tax due should be paid by that date to avoid penalties and interest.
What is Connecticut Form CT-1040 EXT used for?
Use Form CT-1040 EXT to request more time to file a Connecticut individual income tax return. The form does not extend the time to pay Connecticut income tax, so include any required payment with the extension request or use an approved payment method by the original due date.
Who should use Form CT-1040 EXT?
Use Form CT-1040 EXT if you need a Connecticut extension and you do not qualify for an automatic Connecticut extension based on your federal extension and expected Connecticut tax due. Residents, part-year residents, and nonresidents should review the instructions for their return before filing the extension request.
Does Form CT-1040 EXT extend the time to pay Connecticut income tax?
No. Form CT-1040 EXT extends only the time to file the Connecticut income tax return. Pay any expected Connecticut income tax due by the original return due date, even if your filing deadline is extended.
Where can I find the Form CT-1040 EXT instructions?
The Form CT-1040 EXT PDF includes instructions for completing and filing the extension request. Also review the Form CT-1040 instructions or Form CT-1040NR/PY instructions for return-specific extension and payment guidance.
Last updated: August 1, 2026
References:
- Form CT-1040 EXT Application for Extension of Time to File Connecticut Income Tax Return for Individuals. State of Connecticut, Connecticut Department of Revenue. Retrieved August 1, 2026.
- Individual Income Tax Forms. State of Connecticut, Connecticut Department of Revenue. Retrieved August 1, 2026.
- Connecticut Resident Income Tax Information. State of Connecticut, Connecticut Department of Revenue. Retrieved August 1, 2026.
- Connecticut Nonresident and Part-Year Resident Tax Information. State of Connecticut, Connecticut Department of Revenue. Retrieved August 1, 2026.