Swindon sit just one point off the League One automatic promotion places having taken seven points out of a possible 12 since MacDonald took charge.
But the former Aston Villa coach is putting thoughts of new deals for his players to the back of his mind during the run-in.
"Once we've sorted out where we are, whether it's this division or the next, we can start talking about contracts because money is very different in the Championship," he told the BBC.
"All the players I've seen so far are worthy of playing for Swindon in the Championship. The big focus for me is 'can we get promotion?' If we do then we'll sit down and look at things.
"We've got to see where we are because if we are in the Championship, it may be a different calibre of player we require."