A project incurs continuing costs after the facility is completed and while it is in use. These can include costs for any of the following:
Typical elements and examples of these costs are:
Depreciation should not be included in the costs; future expenditures for replacement should be used instead.
Only the marginal cost incurred because of the project should be included. For example, costs of an administration building to be used by people managing a new rail line, but already used by an agency for other purposes, would not be included. Any additional utilities or cleaning services required by the added people would be included. The treatment of inflation should be consistent over all benefits and costs. All costs and benefits should be either in constant/real dollars or in inflated/current dollars. It is easier and generally more accurate to use constant rather than inflated dollars.