If your business owns vehicles, commercial auto insurance is likely one of your largest liability exposures.

Yet many Arizona business owners carry limits that are far too low.

We routinely see companies operating with:

– $250,000 limits

– Split limits like $100K/$300K

– Minimal property damage limits

That may satisfy a legal requirement.

It does not adequately protect a growing business.

At Prosperity North Advisors, we advise most commercial clients to carry $1,000,000 Combined Single Limit (CSL) on commercial auto policies.

Here’s why that matters.

What Does $1M CSL Actually Mean?

CSL stands for Combined Single Limit.

A $1M CSL policy provides up to $1,000,000 total per accident for bodily injury and property damage combined. Instead of splitting limits between:

– Per person bodily injury

– Per accident bodily injury

– Property damage

CSL pools the full amount for a single claim, providing flexibility and stronger protection.

Why $250K Auto Liability Is Often Not Enough

Many small businesses choose lower limits to reduce premium.

Here’s the problem.

If one of your employees causes a serious accident involving multiple injuries and significant property damage, the claim can easily exceed $250,000.

Medical costs alone in a severe accident can surpass six figures quickly.

If damages exceed your limit, your business is responsible for the difference.

Insurance is designed to transfer risk.

Low limits leave risk on your balance sheet.

Who Should Carry $1M CSL?

Most service-based businesses should carry $1M CSL, including:

– Contractors

– Pest control companies

– HVAC companies

– Plumbing companies

– Electricians

– Assisted living facilities transporting residents

– Delivery operations

– Any business with employees driving

If your team is on the road daily, your auto exposure is significant.

Recommended Liability Structure: $1M / $2M

For many growing businesses, we recommend:

$1,000,000 per occurrence

$2,000,000 aggregate

This aligns with common contract requirements and industry underwriting expectations.

It provides meaningful protection without unnecessary overextension of premium.

Umbrella Policy

Strengthening the Protection Layer A $1M umbrella policy sits on top of your commercial auto liability limits.

In many cases, a $1M umbrella costs far less than business owners expect and significantly increases total available protection. For example:

– $1M Auto Liability

– $1M Umbrella

Creates $2M in total protection for a serious claim.

If you:

– Have multiple vehicles

– Carry commercial contracts

– Operate in higher-traffic environments

– Have growing revenue

An umbrella policy should be strongly considered.

Typical Commercial Auto Pricing in Arizona (2026 Market)

1–2 vehicles with clean drivers: $2,500 – $5,000 annually

3–5 vehicles: $6,000 – $12,000 annually

Larger fleets: Pricing scales based on exposure, vehicle type, and driver records.

These estimates assume:

– $1M CSL

– Clean MVRs

– No major losses

Claims history increases pricing.

Common Mistakes Business Owners Make

– Choosing lowest premium over proper limits

– Ignoring driver MVR monitoring

– Failing to review coverage annually

– Assuming personal auto policies cover business use

Commercial exposure requires commercial coverage.

Final Thoughts

Commercial auto insurance is often the largest liability exposure for service-based businesses.

$1M CSL with a $2M aggregate is not excessive.

It is appropriate protection for companies that rely on vehicles daily.

Trying to cut corners here can result in catastrophic financial consequences.

If you would like a coverage review or competitive quote, contact Prosperity North Advisors to schedule a consultation.