Your 4K annual allowance will be taxed with your pay,
so you wont have to apy any more tax.
If the fuel you use is wholelly and solely for business purpose then there is no further tax to pay, but if you use some fuel for private purposes then you will pay only a small amount of tax.

Your 4K annual allowance will be taxed with your pay,
so you wont have to apy any more tax.
If the fuel you use is wholelly and solely for business purpose then there is no further tax to pay, but if you use some fuel for private purposes then you will pay only a small amount of tax.
References :
approx 22% is a ball park figure but it really depends on your tax code
References :
Yes, the £4k should be included in your pay and taxed under PAYE. The amount spent on your fuel card is also taxable assuming it includes fuel for private use.
You will then reclaim your business mileage – presumably from your employer. The max you can claim is 40p a mile without incurring a tax charge.
If your employer does not pay your mileage, then you keep accurate records of business miles and reclaim it from tax at the end of the year – again at 40p per mile.
References :
Ex Inspector of Taxes
YOu need to ask will they pay for servicing and new tyres as this is tax deductable
References :