Company Car VS Cash Allowance

Hello all, I am really trying to understand this company car business however it’s completely frying my brain. I had a cash allowance however have recently sold my car due to wanting a bigger vehicle as my families growing. A car I like has popped up on the company car list and has made me consider a company car but in layman's terms all I want to find out is with the company car how much will my net income be (even an approximate figure) but no one can give me a clear answer. My current income is as per below; £40,000 Salary £7,000 bonus (however this was last years figure this will increase as I recently got promoted) £6,000 cash allowance £761 is life assurance & pension 53,761.49 gross 2,763.83 Total net per month. The car details are; Kia Sportage 1.6 T-GDI 212 Hev GT Line Auto CO2 - 128 P11D - £35,220 Car BIK - £176.10 Removing my current cash allowance of £6k pa, approximately what will my net pay be? Thanks in advance.

Is anyone able to assist? Thank you

Hi

You can use the HMRC tool to calculate the value of the company car: 
Which tax year do you want to calculate for?

Then you can use this link to calculate your income tax:
Check your Income Tax for the current year. 

We are unable to offer financial advice. 

Thank you