Singles may have more fun, but they also pay more than their married friends for car insurance. A single 20-year-old pays 21% more than a married 20-year-old for the same policy, a new study from InsuranceQuotes.com found. To an insurer, it comes down to statistics -- and singles get into more accidents. Married drivers might be more cautious since they're more likely to have kids, said Laura Adams, an analyst an InsuranceQuotes.com. Drivers in their 20's who are married actually get bigger discounts than married drivers in their 30's, who only get a roughly 3% break. Gender and age also play a big role in what drivers pay. Men pay more than women when they're younger. A 20-year-old man pays 22% more than a woman the same age for the same policy, the report found Comments by readers : "Married drivers might be more cautious since they're more likely to have kids, said Laura Adams, an analyst an InsuranceQuotes.com." And if they don't have any kids? I understand using statistics when you have nothing else to base rates on. But once someone has a driving history that should be the only criteria used to set rates."