How Far Back Do DUI Convictions Count in Connecticut?

 Posted on April 15, 2026 in Driving Under the Influence

Under Connecticut General Statutes § 14-227a, only DUI convictions that occurred within the past 10 years are considered prior offenses when determining how serious your current charge is. If your last DUI was more than 10 years ago, the law treats your new arrest as a first offense. If you are facing a DUI charge in 2026, our Fairfield County, CT DUI defense lawyer can help you fight the charges.

What Is the 10-Year Lookback Period in Connecticut?

The lookback period is the window of time the court looks back at when deciding whether a current DUI charge should be treated as a first, second, or subsequent offense. In Connecticut, that window is 10 years.

It does not matter how many DUI convictions you had before that. If all of them are older than 10 years, none of them count as priors for purposes of sentencing. However, if even one of your prior convictions falls within the last 10 years, your current charge may be treated as a repeat offense.

How Does a Prior DUI Within 10 Years Change Your Charge?

The difference between a first offense and a second offense within the 10-year window is significant. A first DUI in Connecticut is a misdemeanor. A second or subsequent DUI within 10 years carries harsher penalties. That shift from first offense to repeat offense also changes the long-term impact on your record and your ability to move forward with your life.

First Offense Within 10 Years

A first offense carries up to six months in jail with a mandatory minimum of two days or 100 hours of community service, a fine of $500 to $1,000, a 45-day license suspension, and one year with an ignition interlock device. This is a misdemeanor charge.

Second Offense Within 10 Years

A second offense within 10 years is still a misdemeanor but with harsher penalties. It carries a mandatory minimum of 120 consecutive days in jail and up to two years, a fine of $1,000 to $4,000, a 45-day suspension followed by three years of ignition interlock, and a required substance abuse evaluation.

Third or Subsequent Offense Within 10 Years

A third or subsequent offense within 10 years is also a felony and significantly more serious. It carries a mandatory minimum of one year in prison and up to three years, a fine of $2,000 to $8,000, and a permanent license revocation, with a hearing possible after two years.

Knowing where your prior convictions fall in relation to the 10-year window is one of the first things a defense attorney will look at.

Do Out-of-State DUI Convictions Count in Connecticut?

Connecticut looks at DUI convictions from other states when applying the 10-year lookback period. If you were convicted of a DUI in another state within the last 10 years, it will generally count as a prior offense in Connecticut.

The key issue is whether the out-of-state offense is substantially similar to Connecticut's DUI law. In some situations, a defense attorney can argue that the out-of-state offense should not count because the laws are different enough. This argument is case-specific and requires careful legal analysis.

What Is the Alcohol Education Program, and How Does the Lookback Period Affect It in CT?

Connecticut offers a pretrial diversion program called the Alcohol Education and Treatment Program, under CGS § 54-56g. This program allows first-time offenders to complete alcohol education classes and, in some cases, a victim impact panel. If you complete the program successfully, the DUI charge is dismissed, and you do not have a criminal conviction on your record.

The lookback period applies to the AE program as well. You are only eligible to use the program if you have not used it in the past 10 years. If you used the program more than 10 years ago, you may be technically eligible to apply again. However, prosecutors often resist approving a second application. If you used the program within the last 10 years, you are not eligible and will need to resolve the case another way.

Schedule a Free Consultation With Our Stamford, CT DUI Defense Attorney

Understanding exactly how your history affects your current charge takes experience and a careful review of the facts. Attorney Daniel P. Weiner brings 40 years of legal experience to every DUI case he handles. He knows Connecticut DUI law inside and out, and he knows how to use every available tool to protect your license, your record, and your freedom.

To learn more, call Law Offices of Daniel P. Weiner at 203-348-5846 today to speak with a Fairfield County, CT DUI defense lawyer before time runs out on your options.