West Ham new-boy Ravel Morrison has no assurances of automatic first-team football at Upton Park.
The former Manchester United teenager joined the Championship leaders in January after Sir Alex Ferguson's tolerance of the midfielder's off-field antics ran out.
England Under 19 international Morrison is considered one of the most promising players of his age, but it is the doubts about his personal life which have caused questions.
And Allardyce has told the youngster he is far from certain of a first-team place at West Ham until he proves himself.
The Hammers boss said in the Daily Express: "We all know he has got the ability, it's just whether we think that ability can go into the first-team right away.
"If yes, then he can play between now and the end of the season. If not, we'll develop him for the start of next season - wherever we are."