The title, which will be produced at the company's Chantry operation, was previously printed by Southernprint. However, tighter turnaround times and a change to the magazine's production schedule required a shift to a printer nearer the club's football ground Old Trafford.
Jim Turner, production manager at Haymarket Media, said: "We had been working with our client to explore how we might tighten up the schedule and had been speaking to a number of printers.
"Southernprint had done a fantastic job printing the magazine but the schedule was most important and having production nearer Old Trafford, where a lot of the magazines are sold, was key."
Although Inside United has a print run of 50,000, the current issue, which is on sale now, had a run of 58,000.
Phil Barlow, of Polestar UK Print, added: "We are delighted to have added one of the major football titles to our portfolio and look forward to working with Haymarket.
"With its breadth of capacity, Polestar Chantry is able to accommodate a variety of schedules, guaranteeing the all-important on-sale dates."
Polestar Chantry to print Haymarket's Manchester United magazine
Polestar has been awarded the contract to print Inside United, Manchester United FC's monthly magazine published by Haymarket Media.