What Does “Stacking” Auto Insurance Mean in Pennsylvania?

Quick Answer

Stacking auto insurance in Pennsylvania generally means adding together uninsured or underinsured motorist coverage limits from more than one insured vehicle.

For example, if three vehicles each carry $100,000 in stacked UIM coverage, the available UIM limits could potentially total $300,000.

Stacking does not apply to every type of automobile insurance coverage, and it may not be available if the named insured validly waived stacked UM or UIM coverage.

Key Takeaways

• Stacking generally applies to uninsured motorist (UM) and underinsured motorist (UIM) coverage.
• It may allow coverage limits from multiple insured vehicles to be added together.
• Stacking can potentially increase the amount of UM or UIM coverage available after a serious accident.
• Pennsylvania allows a named insured to waive stacked UM or UIM coverage in writing.
• The policy and any stacking waiver should be reviewed to determine whether stacked coverage applies.

How Does Stacking Auto Insurance Work in Pennsylvania?

Pennsylvania law generally allows UM or UIM limits from multiple insured vehicles to be added together when stacking applies.

A simple example explains it:

2 vehicles × $100,000 = potentially $200,000

3 vehicles × $100,000 = potentially $300,000

So, if a household has several insured vehicles with stacked UM or UIM coverage, the available limits may be greater than the limit shown for a single vehicle.

Whether those limits are actually available depends on the policy, who qualifies as an insured, and whether stacking was waived.

Does Stacking Auto Insurance Apply to Every Coverage in Pennsylvania?

No.

Stacking auto insurance in Pennsylvania generally refers specifically to uninsured and underinsured motorist benefits.

It does not mean that liability coverage, collision coverage, comprehensive coverage, medical benefits, or every other automobile insurance benefit can automatically be multiplied simply because several vehicles are insured.

That distinction is important.

Can Stacking Be Waived in Pennsylvania?

Yes.

Pennsylvania law permits a named insured to waive stacked UM or UIM coverage by signing the required written waiver.

If stacking was validly waived, the available limits may be restricted to the applicable stated policy limits rather than combining limits from multiple vehicles.

Because of that, simply seeing several vehicles listed on an insurance policy does not necessarily mean stacked coverage is available.

The declarations page and any signed stacking-waiver documents should be reviewed.

Why Can Stacking Matter After a Serious Accident?

Stacking can matter because it may increase the amount of UM or UIM insurance available after an accident involving an uninsured or underinsured driver.

For someone with several insured vehicles, the difference between stacked and unstacked coverage can be significant.

That is why the number of insured vehicles, UM/UIM limits, policy language and any stacking waiver can become important after a serious accident.

What To Do Next

If you believe stacked auto insurance coverage may apply:

1. Locate your automobile insurance declarations page.
2. Identify the UM and UIM limits shown on the policy.
3. Determine how many vehicles are insured.
4. Look for any signed stacking waiver.
5. Preserve all insurance documents and communications relating to the accident.

Need Help Understanding Stacked Auto Insurance Coverage?

Insurance coverage questions can become complicated when several vehicles or policies may be involved.

PhillyLegalConnect provides educational information to help Pennsylvania drivers better understand these issues.

When legal representation is needed, PhillyLegalConnect connects readers directly with The Oakes Firm — Philadelphia Injury Lawyers.

Speak Directly With The Oakes Firm

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