The youngest drivers will be most affected. That's because young men are more than twice as likely to be killed or seriously injured in a car crash than their female peers.
Young women aged 17-22 typically pay up to 40% less for their cover than young men; well, until now at any rate. In middle age, there is little difference in premiums between the genders.
With the new gender equality insurance rules coming into force today, here are seven tips on how to reduce your car insurance.
New rules mean that insurers are no longer able to take gender into account when calculating the price customers pay for insurance.