New South Wales train drivers have been offered an average 4% year pay rise over three years.

New South Wales train drivers have been offered an average 4 per cent a year pay rise over three years following protracted negotiations with the state government.

The Rail Tram and Bus Union says the deal is expected to be presented to members in the coming weeks.

Workers have also been offered a one-off $1000 payment plus free bus travel, if the deal is approved.