Drivers caught using their mobile phone behind the wheel will now be hit with six points on their licence and a £200 fine.
The Department for Transport has been planning a crackdown on the offence for some time now, and previously suggested that a four-point and £150 penalty would deter drivers.
The new penalties are double the previous ones, and the introduction of the tougher legislation comes just days after an RAC survey found a considerable rise in mobile phone use behind the wheel.
Transport secretary Chris Grayling said: “we need to take responsibility for our actions and as drink or drug driving has become socially unacceptable, so must using mobile phones at the wheel.
“It may seem harmless when you are replying to a text, answering a call or using an app, but the truth is your actions could kill and cause untold misery to others.”