Liability Coverage Calculator
Determine your recommended auto liability limits based on your net worth, assets, and income exposure.
About this calculator
This calculator estimates how much bodily-injury (BI) and property-damage liability coverage you should carry on your auto policy, based on how much of your net worth and future income a lawsuit judgment could reach. It adds Other Net Worth, Home Equity, and Savings & Investments into a single Total Asset Exposure figure — the three are separate inputs specifically so nothing gets counted twice — then adds three times your Annual Income (courts can garnish future wages), and recommends a per-person BI limit between $100,000 and $500,000 based on that combined exposure. Total Asset Exposure is the input this recommendation responds to most: because it feeds both the per-person BI limit and the property-damage limit, raising it moves the recommended coverage more than any other single input. Recommended BI per Accident is simply twice the per-person figure, a common simplification -- real per-accident-to-per-person ratios typically range from 2x to 3x depending on the insurer and limit tier (not a separate calculation), and the Current Coverage Gap and Estimated Annual Premium Increase compare your entered Current BI Limit against the recommendation.
This tool does NOT know your state's actual minimum liability requirements, your insurer's actual rate table, your driving record, or your vehicles' values — the premium increase shown is a rough per-$100,000 rule of thumb, not a quote. It also does not account for excess/umbrella liability policies, which many financial advisors recommend once net worth exceeds what auto liability alone can cover. Number of Vehicles affects only the estimated premium increase, not the recommended coverage limits themselves — the limits are sized to your assets and income regardless of how many vehicles you insure.
Financial Disclaimer
This calculator is for educational purposes only and does not constitute financial advice. Results are estimates based on the inputs provided. Consult a qualified financial advisor before making investment or financial planning decisions.
Inputs
Results
Recommended BI per Person
$450,000.00
How to Use This Calculator
- Enter your Other Net Worth (retirement accounts, business equity, vehicles, and anything not counted below), then add Home Equity and Savings & Investments separately — the three combine into your Total Asset Exposure without double-counting.
- Input your Annual Income to factor in wage-garnishment risk.
- Set the Number of Vehicles insured on the policy.
- Enter your Current Bodily Injury (BI) Limit per person to see if it's adequate.
- Review the Recommended BI per Person, BI per Accident, and Property Damage limits based on your assets.
How the result changes with Other Net Worth
| Other Net Worth | Recommended BI per Person |
|---|---|
| $150,000.00 | $350,000.00 |
| $225,000.00 | $400,000.00 |
| $450,000.00 | $500,000.00 |
| $750,000.00 | $500,000.00 |
What each input means
- Other Net Worth
- Net worth from sources other than home equity and savings/investments below — retirement accounts, business equity, vehicles, and other assets minus liabilities. Entered separately from Home Equity and Savings & Investments so the three add up to your total net worth without double-counting.
- Home Equity
- Equity in your primary residence. This is at risk in lawsuits.
- Savings & Investments
- Bank accounts, brokerage, and other non-retirement liquid assets.
- Annual Income
- Gross annual income. Courts may garnish future wages in a judgment.
- Number of Vehicles
- Total vehicles on your auto insurance policy.
- Current BI Limit (per person)
- Your current bodily injury liability limit per person.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersNet Worth = 300000, Home Equity = 150000, Savings & Investments = 100000, Annual Income = 85000 = 6 input(s) provided
- Calculate Recommended BI per PersonRecommended BI per Person450000 = $450,000
- Calculate Recommended BI per AccidentRecommended BI per Accident900000 = $900,000
- Calculate Recommended Property DamageRecommended Property Damage100000 = $100,000
Engine last updated . Checked against 2 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.
Frequently Asked Questions
Which input has the biggest effect on my recommended coverage?
Total Asset Exposure (the sum of Other Net Worth, Home Equity, and Savings & Investments) has the largest effect on the Recommended BI per Person and Recommended Property Damage outputs. Raising it pushes the recommended limits up toward the calculator's $500,000 per-person and $300,000 property-damage ceilings faster than any other single input.
Why does raising my income increase the recommended coverage even though income isn't an asset?
Because courts can garnish future wages to satisfy an unpaid judgment, this calculator adds three times your Annual Income to your asset-based exposure before recommending a coverage limit. So a higher income genuinely raises the Recommended BI per Person, even though income itself is not property that could be seized outright.
Does adding more vehicles change my recommended coverage limits?
No — Number of Vehicles does not move the Recommended BI per Person output at all; the recommended limits are based only on your assets and income. It does affect Estimated Annual Premium Increase, since insuring more vehicles at a higher limit typically costs proportionally more.
How do these recommended limits compare to my state's legal minimum?
Usually far higher. State-mandated minimums are often much lower than what asset-based recommendations suggest — for example, California requires just $30,000 per-person / $60,000 per-accident bodily injury and $15,000 property damage as of 2025, well below the $100,000+ floor this calculator recommends once any meaningful assets are entered. Minimums vary by state, so check your own state's current requirement rather than assuming California's applies.
If my Current BI Limit already exceeds the recommendation, does the calculator still show a gap?
No. Current Coverage Gap is calculated as the recommended limit minus your current limit, floored at zero, so it only shows a positive number when you're underinsured relative to the recommendation. If your current coverage already meets or exceeds the recommended amount, the gap and the associated premium increase both show as zero.
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