Company fuel card/private car

[Zip106]

Would anyone know the tax rules regarding using your own car for work whilst having a company fuel card provided?
How does HMRC work out the tax for the private miles travelled? (40% tax payer)
Is there a set yearly £amount and then taxed at 40% or is it much more complicated than that?

Searched HMRC website but I'm just getting confused....

Thanks in advance.

[Zip106]

I guess I'd better talk to my accountant.

Thanks for the replies but I'm still none the wiser!
Is there anywhere on the HMRC website that gives any info in layman's terms?

[Zip106]

I'm actually enquiring on behalf of my wife. (she's out of the country for the week)
She's possibly going to opt out of the company car scheme and take the money (around £700 pm) but would also get a company fuel card.

I was just dipping my toe in the water before she actually gets to speak to someone at her company that can actually give a definitive answer.

[Zip106]

First I've heard - perhaps Eric may know?

Eta - I was late replying, thanks Eric!

My wife has a card now but does little business miles.
We worked out being better off by paying the BIK on private fuel as we do about 70% of the annual mileage as private use. (even more so now with the cost of fuel)

This obviously would affect us by taking the car allowance ( no choice anymore at her company).

Edited by Zip106 on Friday 4th March 12:24

[Zip106]

From June when her co car lease runs out her company will no longer provide cars but will only give an allowance.
Originally, she was told that she could still have a fuel card.

Hence my o/p about the tax implications regarding this situation - her company can't seem to give a definitive answer.

[Zip106]

That makes a lot of sense, thanks Eric.
Unfortunately she's on the highest tax rate this year so it's going to be painful..

[Zip106]

At the moment they pay for both and she's taxed as a BIK.
It worked out better for us that way.