What Are Per Occurrence and Aggregate Limits?

When you purchase car insurance, your policy assigns dollar limits to how much your insurer will pay when a covered claim occurs. Two of the most important — and most misunderstood — terms you'll encounter are per occurrence limit and aggregate limit. Knowing the difference between the two can be the deciding factor in whether you're fully protected after a serious accident or left paying out of pocket.

A per occurrence limit (sometimes called a per accident limit) is the maximum amount your insurance company will pay for all damages and injuries stemming from a single incident. Whether one person or five people are injured in that accident, the per occurrence limit is the total ceiling your insurer will cover for that one event.

An aggregate limit, on the other hand, is the maximum total amount your insurer will pay across all claims filed within your policy period — typically one year. Think of it as a shared pool of money that gets drawn down each time a claim is paid out. Once that pool is empty, no further claims are covered until the policy resets.

How These Limits Apply to Liability Coverage

Liability car insurance is where per occurrence and aggregate limits are most relevant in an auto insurance policy. Your liability protection is split into two core components:

• Bodily Injury Liability (BI): Covers injuries to other people when you're at fault
• Property Damage Liability (PD): Covers damage to other people's vehicles or property

Most personal auto policies express bodily injury liability limits using a split limit format — for example, 100/300/100. Here's what that means:

• $100,000 – Maximum paid per injured person in a single accident
• $300,000 – Maximum paid for all bodily injuries in a single accident (this is your per occurrence BI limit)
• $100,000 – Maximum paid for property damage per accident

In this structure, the middle number is your per occurrence limit for bodily injury. If three people are injured and each has $150,000 in medical bills, your insurer won't pay $450,000 — they'll pay a maximum of $300,000 total for that one accident, divided among the injured parties.

Serious bodily injury claims are more expensive than many drivers expect. According to the Insurance Information Institute, the average bodily injury claim reached $28,278 in 2024, and industry estimates from CCC Intelligent Solutions place the average even higher at approximately $29,900 per injured person in 2025 — reflecting a 32% rise since 2021. Injuries involving surgery, extended hospitalization, or permanent impairment can easily reach $75,000 to several hundred thousand dollars, well beyond what minimum limits cover.

With new vehicle transaction prices hitting a record $50,326 in December 2025, property damage liability limits deserve equal attention. A single collision can instantly max out a low property damage limit.

Real-World Example: Multiple Accidents in One Policy Year

Let's say you have a commercial auto policy with a $300,000 per occurrence / $600,000 aggregate liability limit:

• Accident #1 (March): You rear-end two vehicles; total damages and injuries = $280,000. Your insurer pays $280,000. Remaining aggregate: $320,000.
• Accident #2 (August): You run a red light; total damages = $350,000. Your insurer can only pay $320,000 (the remaining aggregate). You are personally responsible for the remaining $30,000.

Per Occurrence vs. Aggregate: Personal Auto vs. Commercial Policies

This is where things get critically different depending on your policy type.

Personal Auto Insurance

In standard personal auto policies, aggregate limits are not used. Your liability protection applies independently to each accident — there is no running total that depletes across multiple incidents within the year. Each accident is evaluated against your per occurrence (per accident) limits on its own. This makes personal auto insurance simpler and more forgiving for everyday drivers. Even if you're involved in two at-fault accidents in the same policy year, each incident receives its own full coverage up to your per occurrence limit.

Commercial Auto Insurance

Commercial auto policies — used for business vehicles, delivery fleets, rideshare operations, and company cars — typically use per-accident limits without an annual aggregate cap, similar to personal auto policies. Unlike commercial general liability (CGL) policies, which commonly include aggregate limits, commercial auto liability is designed to provide continuous, per-incident protection. However, some specialty or endorsed commercial auto policies may add aggregate caps, making it critical to review your policy documents carefully. Per occurrence and aggregate limits work together in those cases: each claim erodes the aggregate until it's exhausted.

For most commercial vehicles, a $500,000 to $1,000,000 Combined Single Limit (CSL) per occurrence is standard — particularly for businesses that need to meet client Certificate of Insurance (COI) requirements. Federal FMCSA rules require a minimum of $750,000 CSL for interstate trucking operations involving general non-hazardous freight in vehicles over 10,001 lbs GVWR. In practice, most brokers and shippers require $1,000,000 or more for contracts. Vehicles transporting passengers may require even higher limits: $1,500,000 to $5,000,000 depending on vehicle size and passenger count. Learn more about choosing the right liability limits for your specific situation.

How Limits Reset and How to Choose the Right Amounts

How Policy Limits Reset

For personal auto insurance, your limits apply fresh to each new accident throughout the policy period — typically every 6 or 12 months. There is no depletion of coverage across incidents; each accident stands on its own. At renewal, your new policy period begins and your full limits are in place again for any future incidents.

For commercial or specialty policies that do include aggregate limits, the aggregate resets to its full amount at the start of each new policy term. This is why timing matters: if you're approaching the end of a policy year and an aggregate is nearly exhausted, you're in a vulnerable window.

How to Determine Adequate Coverage Amounts

In 2026, experts consistently recommend carrying bodily injury liability limits well above your state's minimum requirements. Several states raised their minimums in 2025, including California (now 30/60/15 effective January 2025), North Carolina (now 50/100/50 as of July 2025), Virginia (now 50/100/25 effective January 2025), and Utah (now 30/65/25 effective January 2025). In 2026, New Jersey moved to 35/70/25 and Hawaii doubled its limits to 40/80/20 — but even these updated minimums often fall far short in serious accidents. Review our state minimum car insurance coverage changes guide for a full breakdown.

Here's a practical framework for how much coverage you need:

Key factors to consider when setting your limits:

1. Your net worth – Liability claims can target your savings, home equity, and future wages. Your limits should be high enough to protect what you own. Experts generally recommend your total bodily injury limit equal or exceed your net worth.
2. Your driving environment – Urban drivers face more claim frequency; rural drivers may face higher severity due to higher speeds.
3. Vehicle type – Large trucks, SUVs, and commercial vehicles cause more damage in accidents, increasing your exposure.
4. Frequency of driving – The more miles you put on, the greater your odds of being involved in an at-fault accident.

Not sure what limits make sense for your life situation? Review our car insurance coverage recommendations to find the right balance between adequate protection and affordable premiums. If your assets are significant, consider that umbrella insurance — which provides an additional layer of protection beyond your auto limits — costs around $300–$600 per year for $1,000,000 in additional coverage, making it one of the most cost-effective ways to protect your finances.

Frequently Asked Questions

What is a per occurrence limit in car insurance?

A per occurrence limit is the maximum dollar amount your insurance company will pay for all damages — including bodily injuries and property damage — resulting from a single accident. It doesn't matter how many people are involved; the per occurrence limit is the total ceiling for that one event. For example, with a $300,000 per occurrence bodily injury limit, your insurer won't pay more than $300,000 for any single accident regardless of total damages claimed. Any costs above that limit become your personal financial responsibility.

Do personal auto insurance policies have aggregate limits?

No — standard personal auto insurance policies do not use aggregate limits. Your liability limits apply independently to each accident, meaning multiple accidents in the same policy year each receive their own full coverage up to your per occurrence limit. Aggregate limits are far more common in commercial general liability (CGL) policies, not standard commercial or personal auto policies. For everyday personal drivers, this per-accident structure is simpler and more consistently protective.

When does an aggregate limit reset?

An aggregate limit resets at the beginning of each new policy period — typically every 6 or 12 months when your policy renews. Unused coverage does not roll over to the next period, and any claims paid out during the current period do not carry forward. Once a new term begins, your full aggregate limit is restored. This reset timing is especially important for policyholders tracking exposure late in a policy year.

Why do aggregate limits matter for commercial or specialty policies?

While most commercial auto policies use a per-accident structure without an annual aggregate cap, some specialty or endorsed policies may include aggregate limits — particularly in general liability components attached to commercial operations. For fleet operators or businesses with higher claim frequency, even a partial aggregate cap could leave vehicles exposed mid-year if multiple large claims occur. This is why commercial operators often pair their auto coverage with umbrella or excess liability policies for an added layer of protection. Understanding your state minimum car insurance requirements is also critical for commercial operators working across multiple states.

How do I know if my car insurance limits are high enough?

A solid rule of thumb is to carry liability limits at least equal to your total net worth — including savings, home equity, and other assets. Most financial experts recommend a minimum of 100/300/100 for drivers with any significant assets, and 250/500/250 for those with higher net worth. If you're unsure whether you're adequately covered, speaking with an independent insurance agent can help you evaluate your exposure. You can also review our car insurance coverage recommendations to find the right balance between adequate protection and affordable premiums.