2026-04-04 · auto, coverage
Updated: 2026-08-31
By InsuraFAQ Editorial Team · Reviewed for accuracy
How Much Auto Insurance Do I Need?
At a glance
Buy enough auto liability coverage to protect the assets an injured party could go after in a serious crash — that usually means going well above state minimum limits. A common middle-tier limit like 100/300/100 works for renters with modest savings, while homeowners with meaningful equity typically need higher limits or an umbrella policy on top. Match your UM/UIM limits to your liability limits, compare collision and comprehensive premiums with your car’s value and your ability to absorb a loss, and pick a deductible you can comfortably pay on short notice.
Key takeaways
- Set liability limits high enough to cover your home equity, non-retirement savings, and other attachable assets.
- Split-limit notation like 100/300/100 means per-person bodily injury / per-accident bodily injury / property damage — in thousands of dollars.
- Compare the separate premiums, deductibles and potential payout for collision and comprehensive with the cost of replacing your car; check any loan or lease requirements first.
- Match uninsured/underinsured motorist limits to your liability limits rather than leaving them at the state minimum.
- If the right coverage stretches the budget, raise deductibles or shop discounts before cutting liability — never cut liability first.
- Revisit coverage after buying a new car, taking a loan, adding a teen driver, moving, or starting to drive for rideshare or delivery.
Overview
Auto coverage should protect your income, savings, and future earnings. State minimum limits are rarely enough for serious accidents.
Choosing liability limits
- Match limits to your assets and future income.
- Consider an umbrella policy if your net worth is higher.
Choosing deductibles
- Higher deductibles lower premiums but increase out-of-pocket costs. See our breakdown of auto insurance cost per month for typical rate ranges.
- Pick a deductible you can comfortably pay on short notice.
When to adjust coverage
- Buying a new car or taking out a loan.
- Adding a teen driver or moving to a busier area.
- Starting to drive for a rideshare or delivery app, which typically triggers the commercial-use exclusion on a personal auto policy. See our rideshare and delivery insurance guide for the endorsement and commercial-policy options carriers offer.
Next steps
Review your current policy limits and price higher options to see the real premium difference.
Match liability limits to your actual exposure
Liability limits exist to protect the assets an injured party could come after if you cause a serious crash. A simple framework is to add up your home equity, non-retirement savings, and any other attachable assets, then set your liability limit at or above that total. A common middle-tier limit like 100/300/100 is often adequate for renters with modest savings, while homeowners with meaningful equity typically need higher limits.
Those three numbers in a split limit are not random. They represent:
- Per-person bodily injury (the most the policy pays for any one injured person).
- Per-accident bodily injury (the total the policy pays for all injured people in one crash).
- Property damage (the most the policy pays for damage to the other driver’s car or other property).
If your assets exceed what a standard auto policy can reasonably cover, an umbrella policy can sit on top of your auto liability and extend protection into the millions without rewriting the underlying policy.
When to keep or drop collision and comprehensive
Collision and comprehensive cover different types of damage to your own vehicle, subject to your policy. Ask your insurer for each coverage’s annual premium and deductible, then compare those recurring premiums with your car’s current market value and the potential payout after the deductible. The deductible is a potential claim expense, not an annual premium. Consider whether you could afford to repair or replace the car yourself; there is no single percentage that decides the answer for everyone. The California Department of Insurance explains these coverages and deductibles.
Two things to remember before dropping either coverage:
- Your lender or lessor may require collision and comprehensive coverage. Check your loan or lease terms before changing either coverage.
- Once you drop these coverages, any loss from a crash, theft, hail, or fire comes out of your own pocket, so it helps to know what your coverage for totaled cars would have paid if you were still carrying it.
Why UM/UIM is often the underrated line
Uninsured and underinsured motorist coverage (UM/UIM) pays for your own injuries when the at-fault driver has no insurance or carries limits too low to cover your medical bills and lost wages. In many states a meaningful share of drivers on the road are uninsured, and even insured drivers often carry only the state minimum, which can be exhausted quickly after a serious injury.
A practical rule is to match your UM/UIM limits to the liability limits you chose in the first section rather than leaving them at the state minimum. If you felt comfortable buying 100/300 in liability to protect others, you should feel equally comfortable carrying 100/300 to protect yourself. See our full explainer on uninsured motorist coverage for how this coverage is triggered and what it pays.
What to do if the “right” coverage is not affordable
If the limits you actually need push the premium past your budget, the answer is almost never to cut liability. Cut somewhere else first:
- Raise deductibles on collision and comprehensive before cutting liability limits.
- Ask about telematics or usage-based programs that reward safe driving with a short-term discount.
- Ask about low-mileage discounts if your annual miles are below the carrier’s threshold.
- Re-quote with at least three carriers using the same limits, since the same driver profile can price very differently from one insurer to the next.
For a fuller list of levers, see our guide on how to lower insurance premiums.
Frequently asked questions
How much car insurance do I really need?
Enough to cover the assets an injured party could come after in a serious crash. Add up home equity, non-retirement savings, and other attachable assets, then set your liability limit at or above that total. A common middle-tier limit like 100/300/100 is often adequate for renters with modest savings, while homeowners with meaningful equity typically need higher limits or an umbrella policy on top.
What do the three numbers in a split limit mean?
The first number is per-person bodily injury (the most the policy pays for any one injured person), the second is per-accident bodily injury (the total the policy pays for all injured people in one crash), and the third is property damage (the most the policy pays for damage to the other driver’s car or property).
Should I drop collision and comprehensive coverage on an older car?
Compare each coverage’s annual premium and deductible with the car’s current value and what you could afford to pay after a loss. A deductible is paid on a covered claim, not every year. Check your loan or lease for coverage requirements before making a change.
Do I need uninsured motorist coverage if my state does not require it?
Yes for most drivers. Uninsured and underinsured motorist coverage pays for your own injuries when the at-fault driver has no insurance or carries limits too low to cover your medical bills and lost wages. Match your UM/UIM limits to the liability limits you chose rather than leaving them at the state minimum.
When should I raise or lower my auto insurance coverage?
Raise coverage when you buy a new car or take out a loan, add a teen driver, move to a busier area, or start driving for a rideshare or delivery app. Consider dropping physical damage coverage once you own an older, lower-value car outright and your emergency fund can cover replacing it.
What if the right coverage is not affordable?
Cut somewhere else before you cut liability. Raise deductibles on collision and comprehensive first, ask about telematics or usage-based discounts, ask about low-mileage discounts, and re-quote with at least three carriers using the same limits — the same driver profile can price very differently from one insurer to the next. See our full guide on how to lower insurance premiums.