Boring accountant incoming - one thing to add on top of this 'quoted' £25k figure is employer national insurance (15% from Apr-25, 13.8% before) and employer pension costs (i'd assume minimum 3%, could be higher).
The £25k salary per week becomes a £29.5k cost to the club per week using the 15% 'er NI figure and 3% 'er pension contribution - which equates to £1.534m per annum. So the additional employer (the club) cost is £234k per annum. This quickly adds up if we have several high earners. And does this £25k even include all bonuses and add ons etc etc, the club pays the additional 15% and 3% on these too...
For reference (all from the 2024 accounts of Coventry City Football Club Ltd*), the total staff costs for the year ending 31 May 2024 was £23.4m. This was for a total of 214 staff (153 being players & management and 61 being admin & commercial). From a very quick look at our squad for the 23/24 season, we had there or thereabouts a squad of 37 being 26 first teamers and 11 youth players (from:
Coventry City - Detailed squad 23/24), then add in the handful of coaching staff on top of that.
You can begin to try and work out how the £23.4m is allocated across the players & management and admin & commercial staff, but it'd simply be guess work. Based on the £25k per week salary having a total employer cost of £1.534m, if we have 3 players (Wright, Simms, Binks as per the above post) this is £4.5m, so there'd be £18.9m left to allocate to the rest of the staff... you'll begin to run out of money very quickly and we know the £23.4m and 214 total staff numbers are correct.
Long story short, I'd always be sceptical of the figures quoted on the various websites online (they'll loosely be based on a bit of benchmarking of the size of the club and its staff costs from the financial accounts plus any gossip on top) and remember to add in the additional costs when you want to work out the real cost to the football club! The only real way to know a player's salary and agreement with the club is from a legit ITK.
* For completeness, Covcityco Ltd (the parent of Coventry City Football Club Ltd) has the same total staff costs and employee numbers as Coventry City Football Club Ltd. This is important because the parent co, in theory, could have additional management teams and staff costs - but the 2024 accounts confirm this is not the case.