UK matching costs for consultancy business in same period

[Riskreep]

A consulting business that sub contracts some work out. I’ve asked them to quote the job invoice number on all cost invoices associated with each particular job, to which those costs relate to enable accounts to identify and assign all relevant costs to the jobs that incurred them.


Problem is, there may be cases where invoices come in from contractors before they have completed the overall works and therefore can’t invoice the works.


Any suggestions here please on how to treat these cases?