To-Complete Performance Index (TCPI) is the calculated projection of cost performance that must be achieved on the remaining work to meet a specified management goal. The formula to calculate TCPI is Work Remaining (BAC-EV)/Funds Remaining (BAC-AC) or (EAC-AC), where AC is the Actual Cost, EV is the Earned Value, EAC is Estimate at Completion, and BAC is Budget at Completion.