Consultancy expenses invoiced vs claimable

[Liverpool]

Hi- I have a limited comany doing IT consultancy business and would like to know the difference between the expenses i invoice a company and the expenses I can claim myself.
eg if I agree a mileage rate with company X of 50c a mile and invoice at this rate can i claim personal expenses at the civil service rate?
Hope you understand my issue as some companies are unwilling to pay the civil service rates but as a comany director i should be able to claim these expenses from my own company.

 

[bwdbwd]

Would have thought any expenses invoiced to a company / client is just part and parcel of the contract price i.e. it becomes your income, pay tax on it etc.

From this income you would then subtract your travelling expenses and subsistence etc

 

[Liverpool]

Thanks - that is what i was thinking but not sure if revenue would agree.