What is ‘Stacking’ on a Pennsylvania Car Insurance Policy?
Understanding Insurance Stacking in Pennsylvania
“Stacking” is one of the most valuable — and least understood — features available under Pennsylvania car insurance law. If you own more than one vehicle or carry multiple auto policies, stacking allows you to combine, or “stack,” the uninsured motorist (UM) and underinsured motorist (UIM) coverage limits across your policies or vehicles. The result is a significantly higher pool of available coverage if you’re seriously injured by a driver who has little or no insurance.
Pennsylvania law gives drivers the right to purchase stacked UM/UIM coverage. If you own two vehicles, each with $100,000 in UIM coverage, stacking doubles your available protection to $200,000 per accident. With three vehicles, it triples — and so on. For families with multiple cars or policies, stacking can mean the difference between adequate compensation and a coverage shortfall that leaves you paying out of pocket.
Stacked vs. Unstacked Coverage in Pennsylvania
When you purchase an auto policy in Pennsylvania, your insurer is required to offer you both stacked and unstacked UM/UIM coverage. You must affirmatively reject stacking in writing if you don’t want it — otherwise, stacked coverage is the default. Many policyholders unknowingly sign away this right to lower their premium without understanding what they’re giving up.
Unstacked coverage limits your recovery to the single policy limit on the vehicle involved in the accident. If that limit is $50,000 and your medical bills exceed it, you have no additional coverage to draw from — even if you pay premiums on two other vehicles sitting in your driveway.
Inter-Policy vs. Intra-Policy Stacking
Pennsylvania recognizes two forms of stacking:
- Intra-policy stacking — combining coverage limits across multiple vehicles insured under a single policy
- Inter-policy stacking — combining coverage from separate policies owned by you or members of your household
Whether you can stack across policies often depends on the specific policy language and how Pennsylvania courts have interpreted anti-stacking clauses. An experienced Erie car accident attorney can review your policies and determine whether you’re entitled to stack based on the facts of your situation.
Why Stacking Matters After a Serious Accident
Erie and Pennsylvania roads see a significant number of accidents involving underinsured or uninsured drivers. Pennsylvania law requires all drivers to carry a minimum of $15,000 in liability coverage — a limit that is woefully inadequate in cases involving serious injuries, surgery, or long-term rehabilitation. When the at-fault driver’s insurance runs out before your damages are covered, your UIM coverage steps in. If your UIM coverage is stacked, you have far more to work with.
The attorneys at Purchase, George & Murphey, P.C. help Erie accident victims understand their insurance rights and pursue every dollar of coverage available. If you’ve been injured and aren’t sure whether your policy includes stacked coverage, contact our office for a free consultation.
