2023 Connecticut State Tax Deadlines
Connecticut Individual Income Tax Filing deadlines and extensions for 2023.
If you are a resident or have been involved in significant business operations within Connecticut then you might be required to file Connecticut State Taxes. We look at the most important tax deadlines and tax extensions for Connecticut in 2023.
C Corporation
Connecticut C Corporation Tax Deadlines for 2023
You must file & pay Corporate Income Taxes in Connecticut by May 15, 2024
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File by Mail must be postmarked by the due date
Applicable forms:
Form CT 1120 - Corporation Business Tax Return
Extension to File Taxes in Connecticut for 2023
You must send payment for taxes in Connecticut for the fiscal year 2022 by May 15, 2024.
The Extension Deadline is November 15, 2024 to file your Connecticut income tax return.
Connecticut will automatically grant a 6 months extension on filing corporate income tax return if a federal extension is filed. This means you do not need to file for an extension in Connecticut If a payment is due you will need to file Form CT-1120 EXT with accompanying payment (if applicable).
This is an extension to FILE, not an extension to PAY - payment is still due April 18, 2024.
Pass-Throughs
Connecticut S Corporation & Partnership Tax Deadlines for 2023
You must file in Connecticut by March 15, 2024
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File by Mail must be postmarked by the due date
Applicable forms:
Form CT-1065/CT-1120SI - Connecticut Pass-Through Entity Tax Return
Extension to File S Corporation & Partnership Taxes in Connecticut for 2023
You must send payment for taxes in Connecticut for the fiscal year 2023 by March 15, 2024
The Extension Deadline is September 16, 2024 to file your Connecticut income tax return.
Connecticut will automatically grant a 6 months extension on filing corporate income tax return if a federal extension is filed. This means you do not need to file for an extension in Connecticut. If a payment is due you will need to file Form CT-1065/CT-1120SI EXT with accompanying payment (if applicable).
This is an extension to FILE, not an extension to PAY - payment is still due March 15, 2024
Connecticut Individual Tax Deadlines for 2023
Estimated Tax Deadline for Connecticut 2023
Estimated tax payments are made:
- April 18, 2023
- June 15, 2023
- September 15, 2023
- January 15, 2024
See Form CT-1040ES instructions for the amount to pay with each voucher.
Individual Tax Deadline for Connecticut 2023
You must file & pay Individual Income Taxes in Connecticut by April 16, 2024
File Online with My Connecticut Taxes
File by Mail must be postmarked by the due date
Applicable forms:
Form CT 1040 - Full Year Residents
Form CT 1040NRPY- Part Year and Non Residents
Tax tables
Extension to File Taxes in Connecticut for 2023
You must send payment for taxes in Connecticut for the fiscal year 2023 by April 16, 2024.
The Extension Deadline is October 15, 2024 to file your Connecticut Individual Income tax return.Connecticut will automatically grant a 6 months extension on filing personal income taxes if a federal extension is filed.This means you do not need to file for an extension in Connecticut, just the federal extension.
This is an extension to FILE, not an extension to PAY - payment is still due April 16, 2024
Estates Tax Deadline for Connecticut in 2023
File your 2023 Form CT‑706/709 six months after the decedent’s date of death.
Farmer and Fisherman Taxes for Connecticut 2023
If at least 2/3 of your gross income for the taxable year is derived from farming, you may pay estimated tax at any time on or before January 15, 2024. If you wait until January 15, 2024, you must pay the entire balance of the estimated tax. However, if farmers file their tax return on or before March 1, 2024, and pay the total tax at that time, they need not file estimated tax
Sources
- https://portal.ct.gov/DRS/TSC/TSC-Online
- https://portal.ct.gov/DRS/DRS-Forms/Current-Year-Forms/Estate-and-Gift-Tax-CT-706-Series
- https://portal.ct.gov/DRS/Corporation-Tax/Corp-FAQs#:
- https://portal.ct.gov/DRS/Tax-Calendar/Business-Tax-Return-and-Payment-Due-Dates
- https://portal.ct.gov/-/media/DRS/Forms/2021/Corporation/CT-1120_1221.pdf
- https://portal.ct.gov/DRS/Taxes/Pass-Through-Entity/Tax-Information
The material discussed on this page is meant for general illustration and/or informational purposes only and is not to be construed as investment, tax, or legal advice. You must exercise your own independent professional judgment, recognizing that advice should not be based on unreasonable factual or legal assumptions or unreasonably rely upon representations of the client or others. Further, any advice you provide in connection with tax return preparation must comply in full with the requirements of IRS Circular 230.
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