On his way there the Northern Irishman saw off Martin Gould 3-0 in his semi-final, in what he considered a better performance than he produced against Scottish player Maguire, who had earlier ground out a five-frame victory over Ricky Walden in his semi.
"I played well from start to finish, the final was probably my worst game but I am happy with the way I finished it off, making a century break" Allen said.
"It would have been hard to take if I didn’t get through given how well I played to win the group. It was nice to get through to the winners’ group as soon as possible.
"People say that if you go through the groups you keep winning money but there is no guarantee of getting into the winners’ group and that is where everyone wants to be.
"Considering how busy the calendar is now it is nice to have six extra days off from the groups I will miss."
Allen's progression through Group four was near-perfect, having also taken care of Ricky Walden (3-1), Barry Hawkins (3-1), Gould (3-0), Judd Trump (3-0), Mark Selby (3-0), and Maguire (3-1).
He now joins John Higgins, Ali Carter and Ding Junhui in the final group on March 20 and 21.
Twenty-five of the world's top players are competing in the Premier League qualifying tournament.
Seven groups of seven players produce seven winners who play in one further group in March to determine the winner who will play in the 2013 Premier League.
In each group, the top four players from the round robin stage will contest the semi-finals and final over the best of five frames.
The players coming sixth and seventh in the group will be relegated and will not feature in any further group matches and therefore three players will leave and be replaced by a further three players.
Group four results
Judd Trump 2-3 Stephen Maguire
Ricky Walden 1-3 Mark Allen
Stephen Maguire 0-3 Mark Selby
Mark Allen 3-1 Barry Hawkins
Stephen Maguire 3-0 Martin Gould
Mark Selby 3-2 Barry Hawkins
Mark Selby 0-3 Martin Gould
Barry Hawkins 1-3 Judd Trump
Martin Gould 0-3 Ricky Walden
Judd Trump 1-3 Mark Selby
Ricky Walden 1-3 Barry Hawkins
Mark Allen 3-0 Martin Gould
Judd Trump 0-3 Mark Allen
Martin Gould 3-2 Barry Hawkins
Stephen Maguire 2-3 Barry Hawkins
Mark Selby 2-3 Ricky Walden
Stephen Maguire 3-0 Ricky Walden
Mark Selby 0-3 Mark Allen
Judd Trump 2-3 Ricky Walden
Stephen Maguire 1-3 Mark Allen
Judd Trump 1-3 Martin Gould