If a person's driver's license expires, then the person is no longer allowed to drive any form of motor vehicle, and the driver will be subject to fines if caught driving with the expired license. The driver may have to pay additional fees if he or she allows the license to go past 30 days of expiration, and the fees depend on the driver's state.
In many states, if a person's license is less than 30 days past its expiration, then it may be possible to renew it online. Most states require that a renewal take place in person if the expiration was more than 30 days ago. The person renewing a license needs to verify the required documentation for the renewal as the requirements may change between one renewal and the next.