Estate management charge apportionment?

I'm in the process of buying a new build property, I would of course usually go to my solicitor but it's on my mind so I thought I'd come to Reddit as it's a long weekend and I'd like a potential answer.

There is a management company associated with the site and I've received documents regarding the charge for the year which I understand is part and parcel of buying a new build, so have accepted this.

My question is, is this amount usually apportioned from when you complete or do they expect the full amount paid regardless of whether you arrive midway through the year or not?

It's one of the final homes to have been sold and others have been living there since 2023, so I believe other homes have been paying from then through now.