How to think about auto insurance in Illinois: what to buy and why

Updated May 21, 2026 — PolicyChat refreshes this page when new state DOI filings post.

For most Illinois drivers, $300K/$300K liability is the right starting point. The math: most carriers price the jump from $100K/$300K to $300K/$300K at $8-18 a month, and the protection difference is real. A serious bodily-injury claim crosses $100K fast.

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How to think about this

The threshold to think harder is $500K in assets. Past that point, $300K/$300K plus a $1M umbrella is the standard package; the umbrella runs $150-300 a year and requires you to first carry $250K/$500K underlying. Below $500K in assets, $300K/$300K alone is plenty.

When the recommendation changes

• Below $50K in assets: minimum required limits are fine.

• $500K-$2M in assets: $300K/$300K + $1M umbrella.

• Above $2M in assets: talk to a high-net-worth broker about $2M-$5M umbrella.

How PolicyChat sources this data

Public DOI filings + NAIC published averages + licensed partner feeds. Per-record provenance. Methodology: /methodology/rate-authority/

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