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United States · CT · updated 2026-10-12

Connecticut IFTA guide

Carriers based in Connecticut that run qualified motor vehicles in two or more IFTA jurisdictions get their IFTA license and decals from Connecticut Department of Revenue Services (DRS) and file one quarterly fuel tax return there, covering miles and fuel in every member jurisdiction.

Prepare Connecticut returns in IFTAflowAll states
Administered byConnecticut Department of Revenue Services (DRS)
Official IFTA pageportal.ct.gov/drs/ifta/connecticut-ifta
Online filingmyconneCT

Quarterly due dates

IFTA quarterly filing due dates
QuarterPeriodReturn due
Q3 2026Jul 1 – Sep 30, 2026Mon, Nov 2, 2026
Oct 31 falls on a Saturday
Q4 2026Oct 1 – Dec 31, 2026Mon, Feb 1, 2027
Jan 31 falls on a Sunday
Q1 2027Jan 1 – Mar 31, 2027Fri, Apr 30, 2027
Q2 2027Apr 1 – Jun 30, 2027Mon, Aug 2, 2027
Jul 31 falls on a Saturday

Same for every IFTA jurisdiction. When the last day of the month falls on a weekend or legal holiday, the next business day is the due date. A return is required every quarter, even with zero miles.

Taxes IFTA does not cover in Connecticut

  • Highway Use Fee (effective Jan 1, 2023) on vehicles with gross weight of 26,000 lbs or more in FHWA classes 8-13 operated on Connecticut highways; separate permit and return, filed quarterly since Oct 2023 via myconneCT; registered carriers must file every quarter even with no Connecticut operation.

Good to know

  • IFTA returns must be filed online through myconneCT and all IFTA tax payments must be made electronically.

IFTA basics for Connecticut carriers

  • You need an IFTA license if your state is your base jurisdiction and you operate a qualified motor vehicle in two or more member jurisdictions: 2 axles over 26,000 lbs, 3 or more axles, or a combination over 26,000 lbs.
  • The license is renewed every year and each qualified vehicle carries two decals.
  • Late returns: $50 or 10% of delinquent taxes, whichever is greater, plus interest.
  • Keep trip records and fuel receipts for 4 years.
  • Tax rates change quarterly and are published in the IFTA, Inc. tax rate matrix.

File for every Connecticut carrier from one board.

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Sources for this page

This summary is for orientation only and is not tax advice. Rules and rates change; always confirm with Connecticut Department of Revenue Services (DRS).