What are the penalties for a conviction of a third offense DUI (High Rate)?

A third-offense DUI conviction at the High Rate tier in Pennsylvania — meaning a BAC between 0.10% and 0.159% and two prior qualifying DUI offenses within the 10-year lookback period — represents a serious felony-level charge with mandatory imprisonment and lasting consequences.

What Constitutes Third Offense High Rate

High Rate DUI is defined by a blood alcohol concentration between 0.10% and 0.159%. When combined with two prior DUI convictions or ARD completions within the 10-year period preceding the current offense, the charge is treated as a third offense High Rate, triggering Felony 3 grading and the associated mandatory minimum sentences.

Statutory Penalties

Under 75 Pa. C.S. § 3803, a third-offense High Rate DUI conviction carries:

• Mandatory minimum imprisonment: 1 year
• Maximum imprisonment: 7 years
• Mandatory minimum fine: $1,500
• Maximum fine: $10,000
• License suspension: 18 months
• Ignition interlock required upon restoration
• Drug and alcohol treatment as ordered

Felony 3 Designation

Like the third Highest Rate offense, third-offense High Rate DUI is graded as a Felony 3, carrying all of the long-term collateral consequences associated with a felony conviction. These include a permanent felony criminal record, firearm restrictions under state and federal law, professional licensing consequences, immigration implications for non-citizens, and permanent CDL disqualification for commercial drivers.

The Difference Between High Rate and Highest Rate at the Third Offense Level

Both third-offense High Rate and Highest Rate DUIs are graded as Felony 3 with a one-year mandatory minimum. The primary practical differences between the two tiers at this offense level are the minimum and maximum fines — High Rate carries lower fines than Highest Rate. The imprisonment exposure and license suspension period are identical. This means that at the third-offense level, the difference in BAC between a 0.155% and 0.165% reading — the distinction between High and Highest Rate — has less practical significance in terms of imprisonment than it does at lower offense levels, though fines differ.

No Diversion Available

ARD and all other pre-trial diversion mechanisms are unavailable for third-offense DUI charges in Pennsylvania. The case must be resolved through trial or a plea, and conviction carries mandatory imprisonment with no judicial discretion to impose less than the one-year minimum.

Defense Priorities

At the third-offense felony level, the most impactful defense strategies often focus on:

• Challenging the BAC reading: If the BAC can be challenged or excluded, the tier may change — potentially reducing a third High Rate to a third General Impairment, which carries a much shorter mandatory minimum of 10 days rather than one year
• Challenging prior offense qualifications: If either prior offense falls outside the 10-year lookback or can be challenged as constitutionally infirm, the third-offense designation may not apply
• Constitutional suppression motions: Excluding the BAC evidence entirely through a successful suppression motion could reduce the charge to a General Impairment tier or result in dismissal

The stakes at the third-offense felony level in Pennsylvania make vigorous, experienced defense representation not just advisable but essential.