How long do demerit points last on your driver’s licence?

Depending on the state or territory, you are allowed different demerit point limits for your licence type. In NSW, for example, a fully licensed driver can accrue up to 13 demerit points in a three-year period before facing something like a licence suspension. If you’re a “professional driver”, it’s 14 points. But if you’re a P-plater on a P1 licence, it’s just four points – meaning you have to be very well behaved indeed.