Pennsylvania’s DUI law does not treat all drunk driving charges the same. Since 2004, the state has used a tiered system based on your Blood Alcohol Content (BAC) at the time of arrest. The higher your BAC, the more severe the penalties — even for a first offense.
Tier 1 — General Impairment: BAC .08% to .099%
A first offense at this level is an ungraded misdemeanor. Penalties typically include up to 6 months probation (no mandatory jail), a $300 fine, alcohol highway safety school, and one year of ignition interlock. There is no automatic license suspension for a true first offense at this level.
Tier 2 — High BAC: BAC .10% to .159%
A first offense carries a mandatory 12-month license suspension, 48 hours to 6 months in prison, and fines from $500 to $5,000. Alcohol highway safety school and treatment are also required.
Tier 3 — Highest BAC: .16% or Higher, OR Controlled Substance
The most serious tier. A first offense carries a mandatory 12-month license suspension, 72 hours to 6 months in prison, and fines between $1,000 and $5,000. Drivers under the influence of ANY controlled substance — even prescription medication — are automatically placed in this tier regardless of BAC.
Who Else Falls Into a Higher Tier?
- Minors (under 21)
- Commercial driver’s license (CDL) holders
- School bus or school vehicle drivers
- Drivers whose DUI caused an accident with injury or property damage
- Drivers who refused chemical testing (automatically treated as Highest BAC)
What Is ‘Per Se’ DUI?
Pennsylvania uses a ‘per se’ standard: if your BAC is .08% or higher, that fact alone is enough to convict you — no other evidence of impairment is needed. However, you can also be convicted with a BAC below .08% if the prosecution can show you were actually impaired and incapable of safely operating a vehicle.
PA DMV – Official DUI Legislation Page
Related Articles
- I Got a DUI in PA — What Happens Now?
- Can I Avoid Jail Time for a First DUI in Pennsylvania?
- Will I Lose My License After a First DUI in PA?
What Should You Do Next?
Pennsylvania law is complex and deadlines can be short. This article is general legal information — not legal advice specific to your situation.
- Pennsylvania Legal Aid Network – Find Free Help Near You
- PA Courts Self-Help Center
- Lawyer Referral – PA Bar Association
If you cannot afford an attorney, contact your local legal aid office. Time-sensitive legal matters require fast action.