We have negotiated for contractors that are not paid overtime. However there are times, out of the goddnes of their heart, that they work overtime. Our dilemma is that we use timesheet hours to forecast costs and generate an accural for work performed, however if we capture actual hours that may exceed (hence over-accrue and over-forecast) the hours that will be billed. If we only allow them to record 40 hours on their timesheet so it will match billing that decreases our ability to compare schedule estimates to actuals or generate accurate earned value. Any advice on how to resolve?