Should a teen have a separate car insurance policy?

For most families, no. Adding a teen to the parents' policy is usually cheaper than buying the teen a policy of their own, because the teen shares the household's discounts, tenure and higher liability limits. A separate policy also may not protect the parents' assets the way many people hope: in some states the adult who signs a minor's license application is legally responsible for the minor's driving, whichever policy covers the car.

Why insurers expect teens on the household policy

Auto policies are written around a household. Insurers generally ask you to list every licensed household member of driving age, and they price the policy on the drivers who have access to the cars. A teen who lives at home and can reach the keys is a risk the parents' insurer will want to rate, whether or not the teen has a separate policy.

In practice, then, a "separate policy" for a teen living at home often does not take the teen off the parents' policy. The parents' insurer may still require the teen to be listed, or formally excluded, on its own policy. Paying for two policies that both account for the same teen is rarely a bargain.

Who owns the car matters too. Insurance generally follows the vehicle's owner. If the car is titled in a parent's name, the parent normally has to insure it, and a policy in the teen's name alone may not be possible.

Why a separate policy usually costs more

A teen's own policy is priced on the teen alone. That removes several things that keep a family policy affordable:

• Multi-car and multi-policy discounts. A household with two or three cars and a home policy at one insurer typically earns a multi-car discount and a bundling discount. A teen's single-car policy gets neither.
• Tenure and history. Parents' years with an insurer, and their claim-free records, influence the household price. A teen starts with no history.
• Higher limits at a lower marginal cost. Raising liability limits on an existing family policy often costs less than buying the same limits on a brand-new policy for a teen.

A worked example

These figures are hypothetical, for a family with two cars and a 17-year-old:

The separate route in this example costs more and buys less liability protection for the teen, which is the coverage that matters most in a serious crash. Your actual numbers depend on your state, insurer, cars and records, so ask for both quotes before deciding.

Can a minor buy a policy alone?

Usually not without an adult. Insurers commonly require a parent or guardian to sign for, or be the named insured on, a policy for a driver under 18, and in many states the car must be registered to someone who can legally sign the contract. Once a teen turns 18 and owns a car, a separate policy becomes possible, although it is still often expensive.

The liability question parents ask

Some parents want a separate policy so that a teen's crash cannot reach the family's savings. State law can undercut that plan. In California, for example, Vehicle Code 17707 makes the person who signed and verified a minor's license application jointly and severally liable with the minor for damages caused by the minor's negligent driving, subject to dollar limits set elsewhere in the code. Many states have similar signer-liability or owner-liability rules, and anyone who owns the car or lets the teen use it can be named in a lawsuit.

The more reliable protection is usually the opposite of a separate minimum-limits policy: keep the teen on a household policy with high liability limits, and consider an umbrella policy on top. Umbrella insurers typically require that every household driver, including teens, be covered by underlying auto policies at set limits, so check those requirements before you split anything off. For specifics about liability in your state, talk to a licensed attorney.

When a separate policy can make sense

There are situations where it is worth getting both quotes and taking the separate one seriously:

• The young driver owns and titles their own car and is 18 or older.
• They no longer live with you, for example an adult child who has moved out permanently. (A student away at college is a different case; see car insurance for college students.)
• The teen's record is very poor and keeping them on the family policy would push the whole household into a high-risk tier or risk nonrenewal. A separate nonstandard policy may contain the damage, though the parents' insurer may still require the teen to be excluded.
• The family policy covers expensive cars and the teen will only ever drive an older car they own.

Even in these cases, check whether your insurer will let the teen stay on the household policy, which is often allowed for young adults who still live at home part of the year.

Cheaper ways to insure a teen on the family policy

• Assign the teen to the least expensive car. Some insurers rate each driver to a specific vehicle; ask whether yours does and whether you can choose the assignment.
• Raise deductibles or drop collision on an older car the teen drives, if you could absorb the loss.
• Use student and training discounts. Good grades and approved driver training often earn discounts; see how the good student discount works. Some insurers run young-driver programs, such as State Farm's Steer Clear for drivers under 25.
• Try a telematics program. Many usage-based programs reward smooth driving and give parents feedback.
• Exclude a teen who will not drive. If a licensed teen truly will not use the family cars, some insurers allow an excluded driver endorsement. Understand that there is then no coverage at all if the teen drives anyway.

Questions to ask your insurer

1. Do I have to list my licensed teen, and when does that requirement start?
2. What would the teen add to my premium at my current limits, compared with a policy in the teen's own name?
3. Can I choose which car the teen is rated on?
4. Which student, training and telematics discounts apply?
5. If my teen gets a ticket or causes a crash, how will it affect the household premium, and for how long?

For the full process of putting a new driver on your policy, see adding a teen driver to your car insurance.

Key takeaways

• Adding a teen to the family policy is usually cheaper than a separate policy and keeps the teen at the household's higher liability limits.
• A teen living at home may still have to be listed or excluded on the parents' policy, even with a separate policy.
• Separate policies rarely wall off parents' liability; in California, for example, the adult who signs a minor's license application shares liability for the minor's driving.
• A separate policy can make sense for an adult child who owns their car and lives independently, or in some high-risk cases.
• Get quotes both ways before deciding, and use discounts, car assignment and telematics to manage the cost.