Second Offense DUI

A second DUI within 10 years in Pennsylvania carries mandatory jail time, a license suspension, and a year of ignition interlock. The minimum is 5 days in jail at 0.08% to 0.099% BAC, 30 days at 0.10% to 0.159%, and 90 days at 0.16% or higher or in a drug or test-refusal case, where the charge is a first-degree misdemeanor. ARD is generally not available for a second DUI. Panighetti Law defends second DUI charges across Erie County.

A DUI counts as a second offense when you have one prior DUI within the 10 years before the new offense. A DUI conviction from another state can count as a prior. If your earlier case ended in ARD, the new charge is handled under Act 58 of 2025, explained below.

For a second offense, 75 Pa.C.S. § 3804 sets these mandatory minimums:

Every tier also requires one year of ignition interlock after the suspension, alcohol highway safety school, and a drug and alcohol evaluation, with any treatment the court orders. A general impairment DUI involving an accident with injury or property damage is sentenced at the high BAC tier, and a passenger under 18 raises the grading of the charge. See every tier and offense level on our Pennsylvania DUI penalties page.

For years, accepting ARD for a DUI counted as a prior offense. In 2025, the Pennsylvania Supreme Court ruled in Commonwealth v. Shifflett that a prior ARD could not be used that way at sentencing. The legislature responded with Act 58 of 2025, which created a new offense: DUI following diversion.

If you are charged with a DUI within 10 years of completing ARD for an earlier DUI, you can be charged with DUI following diversion, which is penalized like a second offense. Whether it applies depends on the dates and details of your earlier case, so have a lawyer review them before you make any decisions.

Generally, no. Pennsylvania law bars ARD for a DUI when you have a prior DUI offense within the past 10 years. It also excludes cases where an accident caused death or serious bodily injury, and cases with a passenger under 14 in the vehicle. That makes the defense of the case itself, and the sentencing options, more important for a second offense.

• Suspension: 12 months at the general impairment and high BAC tiers, and 18 months at the highest tier.
• Ignition interlock: after the suspension, you need an interlock device for one year before PennDOT restores an unrestricted license.
• Driving during the suspension: some drivers qualify for an Ignition Interlock Limited License for part of the suspension.
• Test refusal: refusing a breath test, or a blood test the police have a warrant for, brings a separate 18-month PennDOT suspension when you have a prior refusal or DUI.
• Commercial drivers: a second DUI-related disqualification is a lifetime CDL disqualification, with only limited reinstatement options.

A prior record raises the stakes, but the Commonwealth still has to prove both the new charge and the prior. Questions that often matter:

• Whether the police had a lawful reason to stop you and enough to arrest you.
• Whether breath or blood testing followed the required procedures, including the two-hour rule.
• Whether the prior actually counts: when it happened, whether it falls inside the 10-year window, and whether an out-of-state conviction is truly equivalent.
• Whether the BAC evidence supports the tier charged, since the tier sets the mandatory minimum.

Justin Panighetti served as an Assistant District Attorney in Erie County from 2009 to 2015, so he knows how repeat DUI cases are built and where they can be challenged.