Premier league referee’s salary has now increased to £38,000 to £40,000 depending on experience however that’s not all, there's also match fees which account for £1000 a match in Premier League and £500 in Championship. Therefore, the average annual income is around £70,000 (Basic salary + Match fees); it's the equivalent of two weeks average salary of a Premier League footballer.
For the assistant referee (used to be called linesmen), they are paid £600 per game (£12,000 per year) in the Premier League.
Referees apply the Laws of the Game so that it is played fairly and safely. A referee should be confident, assertive and fair in order to effectively control the game.
Assistant Referees help the referee take control of the match in accordance with the Laws of the Game; they have particular accountability for when the whole of the ball leaves the field of play to determine which team is entitled to a goal kick, throw-in or corner kick, when a player may be penalized for being in an offside position or when misconduct or any other incident happens outside of the view of the referee.
Of interest, Glenn Hoddle has called on the Premier League to introduce a quota system to force Premier League teams to field a certain number of English players, a system to protect the England national team. Find out more at Sky Sports.