Bellamy will retire from international football after Wales's final World Cup qualifier against Belgium, and his manager feels that this will prolong his club career for several years.
"Craig is a huge influence, a senior player who has been there, seen it, done it," he told WalesOnline.
"He has a hunger and wants to play for his home club. Any thought of retirement is a few years off yet. He's nowhere near that.
"Opting to retire mean he can prolong his club career. That's more so from the travelling aspect of it and the extra games that are in a short space of time between league games."
The Welsh club won promotion to the top flight last season and Mackay believes that the 34-year-old striker's experience will be crucial to his team's chances of staying up.
"He is always learning as well and at same time he has experience to pass on in Premier League," he added.
"Craig has a hunger. His big driving force in coming to Cardiff the first time was to try and get his home team into Premier League football."
Cardiff begin their Premier League campaign away to West Ham United on August 17.