My non negotiables each month are;
£475 rent (one bedroom ground floor flat in serviced communal space with garden area in the complex and a parking space).
£140 Council Tax (water I believe included in here as I'm in Scotland).
£80 electric/gas.
£12 Road Tax.
£21 Internet (sky).
£27 Entertainment (TV licence £12, Netflix £7 and amazon £8
£53 Insurances (car £35, home £10 and life £8)
£50 mobile phone and Samsung watch (most extravagant expense but it does also come with Disney plus and Spotify free with it so essentially "saves" (it's how I justify it to myself)).
My variables each month are what I spend on fuel, food, socialising and self care (sunbeds and getting my nails done).