I know that you can either claim the flat rate of 0.45p per mile up to 10,000 miles or a percentage of ALL vehicle costs. Would using the flat rate include the lease hire costs or can a percentage of the costs be added to the accounts?
So in answer - no you cannot mix and match. Its worth doing your sums to see which is the best method. Bear in mind once decision is made you have to stick with it until they change vehicles, they cannot swap and change. need to give consideration to CO2 emissions in calc if I recall correctly. Have a wander round HMRC for your guidance.
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Joanne
Winner of Bookkeeper of the Year 2015, 2016 & 2017
Thoughts are my own/not to be regarded as official advice,which should be sought from a suitably qualified Accountant.
You should check out answers with reference to the legal position