The Pay As You Save® system enables building owners or tenants to purchase and install money-saving resource-efficient measures with no up-front payment and no debt obligation. Those who benefit from the savings pay for these measures through a tariffed charge on their utility bill, but only for as long as they occupy the location where the measures are installed. The monthly charge is always lower than the measure’s estimated savings and it remains on the bill for that location until all costs are recovered. Like a loan, Pay As You Save® allows for payment over time, but unlike a loan, the payment obligation ends when occupancy ends or the measure fails.