wip categories

Categories for wip, eg, payroll, accounts, tax , consultancy.. so we can clearly see quickly where the outstanding wip is and bill on that specific category. eg, extra payroll costs in the year, click on wip payroll and raise invoice... i don't want to have to look thru a list of wip and tick untick what's relevant. obviously when recording time we'd click into that category too. they have that on digita.