Some 46,000 voters have already hit polling booths across Western Australia to have their say in the state election, after early voting was opened up to everyone.

At previous elections, West Australians could only cast their vote early if they had a valid reason, such as being out of the state on the day of the election.

However, the WA Electoral Commission (WAEC) has abolished that rule to reflect "modern lifestyles and employment patterns".

WA electoral commissioner David Kerslake said there had been a "steady flow of voters" at 35 polling centres since they opened just over a week ago.

"We've taken 46,000 early votes already but we expect to get substantially more than that, particularly next week as we get closer to election day," Mr Kerslake said.

"It is too early to say whether it is going to be much higher than the last election ... (but) we are expecting a considerable increase in early voting compared with previous elections."

He would not release pre-polling numbers for the same time at the last election, saying it would be comparing apples to oranges as the rules were different.

In a first, WAEC has also decided to allow people with an incapacity or disability that made it difficult to vote at ballot boxes the option to vote via the internet instead.

Mr Kerslake said that decision was also proving popular.

"We have received over 400 registrations already to use our new internet voting system," he said.

"Internet voting has been really well received by the various peak organisations around the state."

All votes will be counted after 6:00pm on election day on March 11.

The commissioner said the early votes would have no impact on when the result will be known.