It’s not surprising that putting a teenage driver on an auto policy will push up premiums, but parents may be shocked to find out how much.

InsuranceQuotes.com surveyed the average amount a teen can push up parents’ premiums state-by-state. The company found 10 states where premiums more than doubled.

The highest: Arkansas, where premiums on average rose 116 percent, followed by Utah, Wyoming, Alabama, Idaho, Maine, Washington, Arizona, Louisiana and New Hampshire.

Maryland came in 27th, with an 88 percent increase.

InsuranceQuote says premiums are partly based on the amount of miles a motorist drives, which is why so many parents in rural states see such a big jump in premiums.

Parents in Hawaii saw only an 18 percent increase because of a state law that doesn’t allow insurers to consider age, gender or years of driving when setting premiums, according to InsuranceQuotes. (Another reason to move to the island?)

Other InsuranceQuotes findings: Boys are more expensive to insure than girls —  a 96 percent average increase in premiums compared with 72 percent. Also, 16-year-olds are the most expensive to add to a policy — a 99 percent increase in premiums— but the increases drop as the child gets older. For instance, a 19-year-old pushes up premiums by 65 percent.

 

InsuranceQuotes tells parents they can keep premiums down by buying teens older cars and safer cars which are cheaper to insure. They should also see if their child may be eligible for discounts, such as a good student premium break.