Form CT-1040ES - 2026 Estimated Connecticut Income Tax Payment Coupon for Individuals - Rev. 01/26 - Instructions

Sep 20, 2026

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Form CT-1040ES is the 2026 Estimated Connecticut Income Tax Payment Coupon for Individuals for taxpayers who must make estimated income tax payments for the 2026 taxable year. It explains who should file, the due dates (April 15, June 15, September 15, 2026, and January 15, 2027), and requirements for timely filing. The form provides instructions for completing coupons in blue or black ink, cutting and mailing the coupon with payment, payable check guidance, and where to send the completed coupon and payment to the Connecticut Department of Revenue Services.

LanguageEnglish

CategoryForms

FormatPDF

Pages1

AccessFree to download

Who Should File This Coupon

When to File

Online Payment Option

Form CT-1040ES Tax Payment Coupon Instructions

Mailing Address

Completing the Payment Coupon

Department of Revenue Services State of Connecticut Form CT-1040ES 2026 Estimated Connecticut Income Tax Payment Coupon for Individuals 2026 (Rev. 01/26) [Form CT-1040ES can be filed and paid](Form CT-1040ES can be filed and paid electronically using myconneCT at portal.ct.gov/DRS-myconneCT)[ electronically](Form CT-1040ES can be filed and paid electronically using myconneCT at portal.ct.gov/DRS-myconneCT)[ using](Form CT-1040ES can be filed and paid electronically using myconneCT at portal.ct.gov/DRS-myconneCT)[ myconneCT](Form CT-1040ES can be filed and paid electronically using myconneCT at portal.ct.gov/DRS-myconneCT)[ at](Form CT-1040ES can be filed and paid electronically using myconneCT at portal.ct.gov/DRS-myconneCT)[ portal.ct.gov/DRS-myconneCT](Form CT-1040ES can be filed and paid electronically using myconneCT at portal.ct.gov/DRS-myconneCT). Who Should File This Coupon: Use this coupon if you are required to make estimated income tax payments for the 2026 taxable year. Please note that each form is year specific. To prevent any delay in processing your return, the correct year’s form must be submitted to DRS. When to File: Estimated payments for the 2026 taxable year are due on or before April 15, June 15, September 15, 2026, and January 15, 2027. Fiscal year filers should follow federal filing dates. If the due date falls on a Saturday, Sunday, or legal holiday, your estimated payment will be considered timely if filed on the next business day. An estimate will be considered timely if received, or if the date shown by the U.S. Postal Service cancellation mark, is on or before the due date. Visit the DRS website at [portal.ct.gov/DRS-myconneCT](portal.ct.gov/DRS-myconneCT) to make your estimated payments online and receive immediate confirmation that your payment was timely remitted. Form CT-1040ES-Tax Payment Coupon Instructions • Print all information. Include your spouse’s SSN, if married filing jointly. • Cut along dotted line and mail coupon and payment to the address below. • Make your check payable to Commissioner of Revenue Services. • Do not use staples. • DRS may submit your check to your bank electronically. • To ensure proper posting, write your SSN(s) (optional) and “2026 Form CT-1040ES” on your check. Send completed coupon and payment to: Department of Revenue Services State of Connecticut PO Box 2932 Hartford CT 06104-2932 Completing the Payment Coupon Complete the attached payment coupons in blue or black ink only. You must enter all the required taxpayer identification information. Enter the payment amount below. In determining your payment amount, you may subtract from your installment amount any available overpayment of 2025 income tax. Department of Revenue Services State of Connecticut PO Box 2932 Hartford CT 06104-2932 1040ES 0126W 01 9999 Form CT-1040ES Estimated Connecticut Income Tax Payment Coupon for Individuals 2026 (Rev. 01/26) Your first name Spouse’s first name Middle initial Middle initial Last name Last name Mailing address (number and street), Apartment number, PO Box City, town, or post office State ZIP code 􀁘 􀁘 􀁘 Your Social Security Number Spouse’s Social Security Number Due date Payment amount (MM-DD-YYYY) .00

FAQs

Who should use Form CT-1040ES?

Use this coupon if you are required to make estimated income tax payments for the 2026 taxable year. Each form is year-specific, so the correct year’s form must be submitted to DRS.

What are the due dates for the 2026 estimated payments?

Estimated payments are due on or before April 15, June 15, September 15, 2026, and January 15, 2027. If a due date falls on a weekend or legal holiday, timely filing is based on the next business day and the mailing cancellation mark.

How should the payment coupon be completed and submitted?

Print all information and complete the attached coupons in blue or black ink only, entering required taxpayer identification details and the payment amount. Cut along the dotted line, mail the coupon and payment to the address provided, and make checks payable to the Commissioner of Revenue Services without using staples.

Sep 20, 2026

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