Usage-based car insurance explained

Usage-based insurance (UBI) prices part of your car insurance on how you actually drive — how hard you brake, how fast you go, when you drive, whether you handle your phone — or simply how many miles you drive, measured by a phone app, a plug-in device or the car itself. Most programs give a discount for enrolling and adjust your price at renewal based on the data. Careful, low-mileage drivers usually save; in many programs, riskier drivers can pay more.

The three main types

Behavior-based programs

These score your driving habits using telematics — sensors and GPS in your phone, a device in the car's diagnostic port, or the car's own connected systems. Examples include Progressive Snapshot, State Farm Drive Safe & Save, Allstate Drivewise and Nationwide SmartRide. You usually get a participation discount at sign-up, then a personalized discount or rate change at policy renewal. Some programs monitor for a fixed period; others keep monitoring for as long as you are enrolled.

Pay-per-mile programs

Pay-per-mile insurance charges a base rate plus a few cents for each mile driven, billed monthly. Allstate Milewise, Nationwide SmartMiles and USAA SafePilot Miles are examples. These suit people who drive much less than average. See pay-per-mile car insurance: how the pricing works for the math.

Verified low-mileage programs

A third approach uses verified mileage to set a conventional premium, without per-mile billing or behavior scoring. American Family's MilesMyWay, for example, uses odometer photos and offers savings for driving about 20 miles a day or less; the company stresses that it is not pay-per-mile.

What gets measured

Each insurer chooses its own factors. Published examples (October 2026):

• Progressive Snapshot looks at hard braking and rapid acceleration, late-night driving (its guidance singles out midnight to 4 a.m. on weekends), how much you drive and, with the app in some states, handheld phone use.
• Nationwide SmartRide measures miles driven, hard braking and acceleration, idle time (a sign of congested traffic) and nighttime driving between midnight and 5 a.m.
• Travelers IntelliDrive captures braking, acceleration, speed, time of day and distraction from handheld phone use, and says location data collected in the app is not used to set the premium.

App-based programs generally try to detect whether you were the driver or a passenger; most let you correct a trip, and Travelers, for example, gives you 10 days to do so.

How it changes your price

Three things determine what UBI does to your bill:

1. The participation discount. Most programs give an upfront discount for enrolling, usually replaced by your earned result at renewal.
2. Whether your price can go up. This is the most important difference between programs. Progressive says your Snapshot rate "may increase with high-risk driving" and that "only about 2 out of 10 drivers actually get an increase". Nationwide says SmartRide is "a discount program" that does not raise rates. Compare programs in telematics programs from the major insurers compared.
3. How long the score lasts. Travelers' IntelliDrive score, for example, applies for the life of the policy after a 90-day program; continuous programs recalculate at each renewal.

Where state rules limit UBI

States regulate rating factors, so programs differ by state. California is the clearest example: under its insurance regulations, an insurer may use a device to verify actual miles driven, but "shall only use a technological device to collect information for determining actual miles driven" and "shall not use a technological device to collect or store information about the location of the insured vehicle" for rating. As a result, several behavior-based programs, including Snapshot, GEICO DriveEasy, Drive Safe & Save and USAA SafePilot, are not offered there. Other states set their own limits — for example, Travelers says riskier driving will not raise IntelliDrive premiums in DC, Montana, North Carolina and Virginia.

Who tends to benefit

UBI usually rewards:

• Drivers who rarely drive late at night.
• Drivers with smooth braking and acceleration and little phone handling.
• People who work from home, retirees and households with a rarely used second car.
• Young drivers whose age group is priced high but who drive carefully — a good score can offset part of the age surcharge.

It may not suit:

• People who drive overnight shifts or long highway commutes at high speeds.
• Drivers in heavy stop-and-go traffic, where hard braking is hard to avoid.
• Anyone uncomfortable sharing location and driving data (see what driving apps collect and how insurers use it).

How to decide

1. Read the program terms for your state: can your rate go up, how long is the monitoring period, and what happens if you opt out?
2. Check the data rules: what is collected, how long it is kept, and whether it can be used in claims.
3. Be honest about your driving. If you often brake hard, drive after midnight or use your phone at the wheel, a program that can raise rates is a gamble.
4. Consider a discount-only program if you want the savings without the downside, or a pay-per-mile plan if you simply drive little — the pay-per-mile break-even calculator shows your break-even mileage.
5. Compare the final price, not just the discount. A 20% UBI discount from an expensive insurer can still cost more than another company's standard rate.

Data can also reach insurers without your enrolling in any program, through automakers and data brokers. That is a separate issue covered in connected-car data, data brokers and your premium.

Key takeaways

• Usage-based insurance prices part of your premium on how or how much you drive, measured by app, device or the car.
• The three main types are behavior-based scoring, pay-per-mile billing and verified low-mileage discounts.
• Whether your rate can go up varies by program and state; check before enrolling.
• California limits rating devices to mileage and bars insurers from using them to collect location data, so several programs are not offered there.
• Careful, low-mileage and daytime drivers benefit most; compare final prices, not discount percentages.