So your take home is £1850
Your outgoings there are £1100 even including the expensive car, and £30 of nails a month.
There’s still £750 or £9000 per year vanishing that you haven’t accounted for?
£2500 holidays, £400 car service. Still £6000 missing!
What about MOT, tax, tv license? Still not gonna make up that sum of money do work out what Is making it up!
Ultimately you earn a good wage but you are doing yourself out of a good pension by not saving now - everything you save into one (assuming you have a student loan) will be worth 1.7x the cost from your take home instantly (20% tax, 12% NI, 9% student loan = 41% effective tax rate: 1/(1-0.41)=circa 1.7 and compound interest can then multiply that up fourfold over time.
I pay myself first (ie save as soon as I’m paid), but I also have a waaay less fancy lifestyle. I only budget loosely - but that’s because I’m saving plenty. I put £175 into a savings account monthly - this covers car insurance, house insurance, MOT, and the other irregular bills. I then save separately for holidays and long term. I can budget loosely because for years I budgeted rightly so now I can let things slide a little.
But letting things slide is a holiday to France with friends that should be less than £400 including spending for the week. My phone is £7.50. I drive a car that was (to me) mega expensive and does everything I could want: reliable, Bluetooth, air con, power steering, reversing camera. But it came out of savings and will last years.
You can choose something you don’t want to scrimp on - you’re well paid. You at that’s your car -fab! But then you also want mega holidays and a mega fancy phone, and nails done (local beauty college instead? They’re £8 there near me!) and wherever the remaining £6k a year is going! So if the car is non negotiable then the other things need to flex. If you don’t even know what the £6k is to write it down - clothes? Hair? Is it worth it?