Texas Auto · UM / UIM · First-Party Coverage
Most Texas drivers should seriously consider uninsured / underinsured motorist (UM/UIM) coverage—even though it is not the same as the liability insurance you need to register a car. UM/UIM pays you and your passengers when the at-fault driver has no insurance, too little insurance, or flees the scene. This guide explains what it covers, how stacking vs non-stacking works at a high level, and why it matters on Texas roads.
Quick split: Liability pays other people if you cause a crash. Collision can repair your car after many accidents. UM/UIM is first-party coverage that steps in when the other driver cannot pay your bodily-injury (and often related) damages. None of these replaces the others.
1. What UM and UIM cover in Texas
In Texas, uninsured and underinsured motorist coverages are usually sold together as UM/UIM:
- Uninsured motorist (UM): the at-fault driver has no auto liability insurance, or is a hit-and-run in situations your form covers
- Underinsured motorist (UIM): the at-fault driver has insurance, but their limits are too small to pay your damages
Typical UM/UIM benefits (subject to your form) can include medical bills, lost wages, and other bodily-injury damages up to your selected limits—after applicable offsets and conditions. Property-damage UM (UMPD) may be available separately or as an option on some forms; do not assume your medical UM automatically rebuilds your car.
Related reading: uninsured motorist coverage in Texas · what Texas car insurance covers · liability vs full coverage.
Must be offered
Texas law generally requires auto liability policies issued in the state to include UM/UIM unless a named insured rejects it in writing. A casual “no” on a phone quote is not the same as a signed rejection.
Not required to buy
You can reject UM/UIM in writing. That choice can follow renewals with the same insurer or affiliate until you ask to add coverage back. Rejection is a risk decision—not a paperwork shortcut.
2. Why it matters with uninsured and underinsured drivers
Texas still has a meaningful share of vehicles without matching liability insurance. Industry and state estimates of uninsured driving have long sat in the low-to-mid teens percent range—high enough that “the other person will have insurance” is not a plan. Underinsurance is quieter but common: a driver can be legal at the state minimum of 30/60/25 ($30,000 bodily injury per person / $60,000 per accident / $25,000 property damage) and still leave a serious injury claim unpaid after one ER visit or surgery.
UM/UIM is how many households fill that gap with their own policy rather than hoping the other driver’s paper limits are enough.
3. Stacking vs non-stacking (high level)
Stacking means combining UM/UIM limits from more than one vehicle or policy for a single claim. Non-stacking means you generally look to one set of limits (often the vehicle you occupied, or the highest available under the form’s rules)—not a simple multiply-by-number-of-cars result.
| Idea | What it usually means | Texas practical note |
|---|---|---|
| Stacking | Add or combine limits across vehicles/policies when the form and facts allow | Many personal-auto forms are written to limit or prevent classic multi-vehicle stacking; outcomes are fact- and form-specific |
| Non-stacking | One applicable limit for the loss, not “three cars × limit” | Common on modern Texas personal auto forms—read the UM/UIM section, not a blog rumor |
| Higher single limits | Buy 100/300 (or similar) UM/UIM instead of relying on stacking math | Often the cleaner way to increase protection for your household |
If you insure several vehicles, ask your agent whether your form is stacking or non-stacking, how passenger claims are treated, and whether raising the UM/UIM limit on the policy is a better path than assuming limits will “add up.”
4. How UM/UIM fits with the rest of your policy
- Liability protects others when you are at fault—and is what Texas registration / financial-responsibility rules focus on
- Medical payments / PIP (when carried) can help with early medical bills regardless of fault, with their own limits and offsets
- Collision repairs your vehicle subject to deductible; it does not replace UM/UIM injury benefits
- Health insurance may pay medical bills, then seek reimbursement; it is not a substitute for UM/UIM wage or non-economic damages your auto form may address
After a crash, document injuries early and review claim steps carefully—see our Texas auto claims tips.
5. Practical Texas checklist
- Confirm UM/UIM appears on your declarations (or that you intentionally signed a rejection)
- Match UM/UIM bodily-injury limits to the liability limits you would want for your own family—many people choose higher than 30/60
- Ask how your form treats hit-and-run, motorcycle, and passenger claims
- Revisit the choice at every renewal—especially after adding a teen driver, a financed car, or a commute change
- Remember: rejecting UM/UIM does not lower your legal duty to carry liability for registration and driving
FAQ
Is UM/UIM required in Texas?
Insurers must generally offer it on auto liability policies. You may reject it in writing. It is not the same mandate as minimum liability for registration.
Does liability already cover me if I am hit?
No. The other driver’s liability (if any) pays you. Your liability pays others when you are at fault. UM/UIM is your backup when the other driver cannot pay.
Can I stack UM/UIM on multiple cars?
It depends on your policy language and claim facts. Many Texas personal-auto forms are non-stacking. Ask your agent and read the UM/UIM section rather than assuming limits multiply.
What limits should I choose?
There is no one number for every household. A common approach is to align UM/UIM with the liability limits you would want protecting your own family—often above the 30/60 state minimum.
Does this replace health insurance?
No. Health insurance, PIP/MedPay, and UM/UIM can interact. UM/UIM is auto first-party coverage with its own rules, offsets, and damages categories.
