But despite the increased penalties in NSW, those caught drink driving in Victoria can still expect much heftier suspensions.

Drivers caught with low-range readings in NSW will lose their licence on the spot for three months, and be fined $561, from May 20.

Under the current system, drink drivers are ordered to attend court and NSW magistrates often allow them to keep their licences, particularly for first time offenders and people with lower readings.

Victorian drink drivers are disqualified for a minimum six months for readings between .05 and .099, with magistrates unable to exercise discretion.

NSW Minister for Transport and Roads Andrew Constance said drug driving penalties were also changing, with automatic three month bans and a fine for confirmed drug driving cases.

"This means anyone caught drink driving in NSW, at any level, including low-range, can now lose their licence immediately," Mr Constance said.

"This reform makes it clear if you break the law, you will pay the price.

"We are taking a zero-tolerance approach to drink and drug driving.

"Drivers who have an illegal level of alcohol in their blood or have used illegal drugs have no place on the road."

Those caught can still elect to have the matter heard by a magistrate.

Statistics show alcohol was a factor in crashes that killed at least 68 people on NSW roads last year, with 55 of those on country roads.

Assistant Police Commissioner Michael Corboy said the changes would provide certainty about penalties.

"Alcohol is one of the major factors in crashes that kill or injure people on NSW roads," he said.

"The 0.05 blood alcohol limit has been in place for almost 38 years.

"There are no more excuses."