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Connecticut OUI Laws

While most states refer to drunk or impaired driving charges as "driving under the influence" (DUI) or "driving while intoxicated" (DWI), Connecticut calls it "operating under the influence" or simply "OUI." But whichever acronym you use, driving under the influence of alcohol or other drugs is a serious crime with stiff penalties. In Connecticut, for instance, all motorists are required to install an ignition interlock device (IID) after an OUI conviction before full driving privileges will be restored. After a third or subsequent OUI offense, drivers can have their license revoked permanently (subject to a hearing request after two years of revocation). Those under 21 face even tougher penalties for driving under the influence.

The following charts and links will help you better understand Connecticut's OUI laws and regulations.

Connecticut OUI Laws: Blood Alcohol Concentration (BAC) Limits and Implied Consent

"Per Se" BAC Limit 0.08 Percent
Zero Tolerance (Underage) BAC Limit 0.02 Percent
Enhanced Penalty (Aggravated) BAC Limit 0.16 Percent
Implied Consent

to Submit to BAC Test?


Connecticut OUI Laws: Select Penalties

Minimum License Suspension or Revocation

(1st, 2nd, 3rd offense)

45 days (plus 1-yr. IID), 45 days (plus 3-yr. IID), permanent
Mandatory Alcohol Education, Assessment and Treatment Both (2nd offense)
Vehicle Confiscation


Ignition Interlock Device



Note: State laws are always changing through legislative, judicial, or other means. While FindLaw works hard to ensure the accuracy of its legal resources, it's a good idea to thoroughly research the law or check with an attorney to make sure you have the most recent information. 

Penalties for Under-21 OUI Offenders

As in other states, Connecticut has very strict penalties for minors who are convicted of driving under the influence of alcohol or other drugs. For instance, motorists under 21 whose blood alcohol concentration is measured at 0.02 or higher will have their license suspended for one year, followed by a one-year IID requirement, for the first offense. A second offense can result in a three-year suspension. 

Connecticut IID Program

You will be required to have an IID installed on your vehicle as a condition of driving (with a limited license) in Connecticut for the following offenses:

  • Failure or refusal of a BAC test
  • Operating under the influence (OUI) of alcohol or other drugs
  • Vehicular manslaughter
  • Vehicular assault
Be aware of the special penalties for failure to use the IID properly.

Connecticut OUI Resources

Don't Face OUI Charges Alone: Get Help From an Attorney

The law can be quite complicated, particularly when criminal charges are involved. If you have been charged with a OUI in Connecticut, keep in mind that you may be facing more than just fines. An experienced attorney will protect your interests and help you get the best outcome possible, including the avoidance of jail time in some instances. Get started today and find a Connecticut OUI attorney near you.

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Contact a qualified DUI attorney to make sure your rights are protected.

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  • Complex DUI situations usually require a lawyer
  • DUI defense attorneys can challenge Breathalyzer/Intoxilyzer or blood test results
  • A lawyer can seek to reduce or eliminate DUI penalties
  • A lawyer can help get your license back

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DUI Laws & Resources

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