Normally the Driving Under the Influence (DUI) conviction will remain on your Pennsylvania driving record for ten years.
As you are aware because of your experience already, in PA they allow for an Accelerated Rehabilitative Disposition (ARD) for first time DUI offenders. When a DUI violator is accepted into an ARD program the state suspends their charges but requires that certain court ordered conditions are met. These conditions may include drug and alcohol counseling, community service, etc. Similar to a probationary program the ARD program requires a period of supervision.
Once you have completed your ARD program, the original criminal charges are dismissed. You may request that the court expunge the arrest record but the DUI or ARD will be noted on your motor vehicle record (MVR).
PennDOT notes that they will automatically expunge ARD records after 10 years, provided that your operating privileges were not revoked as a habitual offender or a commercial driver (CDL holder) at the time of the DUI.
According to the Pennsylvania Insurance Department, if you are convicted of a DUI, whether or not you complete an ARD program, your license will be suspended. This alone is a valid reason for insurance companies to raise rates, cancel or non-renew your policy. So unfortunately it is very likely that your DUI will affect your auto insurance rates when you go off your parent's policy and obtain your own car insurance policy.
Insurance companies rating systems and look back periods do vary though so depending upon how far back your DUI was it may be possible that some PA insurance companies will not rate you on it. Before getting off of your parent's car insurance policy you should start shopping around for the affordable auto insurance.
To start shopping come to CarInsurance.com for instant car insurance quotes. CarInsurance.com is an Online Insurance Marketplace™ gives consumers the opportunity to shop and compare insurance companies online. We offer the ability to shop for car insurance online and the ability to purchase your policy directly through our site. Even with a DUI on your record CarInsurance.com can help you check car insurance prices and find coverage that is right for you.