Adding a teenage driver to a married couple’s car insurance policy leads to a 79 percent higher average annual premium, according to InsuranceQuotes.com.
However, Hawaii is the only U.S. state that prohibits age, gender and length of driving experience from affecting car insurance costs.
Rates in Hawaii nevertheless rise by an average of 17 percent, according to the InsuranceQuotes.com report.
The most expensive state to insure a teenage driver is New Hampshire, where the average premium skyrockets by 111 percent.
Other states where insurance rates spike more than 100 percent include Rhode Island and Maine, up 107 percent; Wyoming, up 106 percent; Connecticut, up 102 percent; and Illinois and Oregon, where average annual premiums rise 101 percent after adding a teenage driver.