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Uninsured Motorist Gap Calculator

What happens when the at-fault driver carries minimum limits and your damages do not.

Read the how-to
The formula

How this number is built

recoverable = their limit + UIM (excess or offset) + medical payments, capped at total damages
Step by step

Doing it by hand

Step 1

Establish the at-fault driver's limits — many states require disclosure on request.

Step 2

Read your own declarations page for UM/UIM limits and whether stacking applies.

Step 3

Check whether your state treats UIM as excess or as an offset; the difference is large.

Step 4

Notify your own insurer early, because UIM policies carry their own notice conditions.

Questions

What people ask next

Is UIM worth buying?

It is usually one of the cheapest coverages on a policy and the one most likely to matter in a serious injury.

Does using UIM raise my premium?

A not-at-fault UIM claim generally should not, though practice varies by insurer and state.

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Estimates, not advice. Every figure here is produced from the inputs you enter and the formula printed on the page. Rules differ by state, carrier, lender and contract, so use these numbers to prepare for a conversation with a qualified professional rather than to replace one. See our full disclaimer.