Earned value management: cost and schedule performance, forecast final cost.
cost performance index (CPI)
How to use this tool
PV is what should be done; EV is what is actually done, in budget terms.
AC is what the completed work really cost.
BAC is the approved budget for all work.
CPI/SPI show health now; EAC and VAC forecast the finish.
Formula & worked example
Worked example: PV $100,000, EV $90,000, AC $100,000, BAC $200,000. CV = -$10,000, SV = -$10,000, CPI = 0.90, SPI = 0.90. EAC = $100,000 + ($200,000 – $90,000) / 0.90 = $222,222. ETC = $122,222. VAC = $200,000 – $222,222 = -$22,222.
Limitations — read this before you rely on it
EVM quality depends entirely on honest percent-complete and a sound baseline: inflated EV flatters both indices. The EAC formula used here assumes current cost performance continues; other EAC formulas suit different causes of variance.
Frequently asked questions
The budgeted value of work actually completed. Comparing it with planned value and actual cost separates schedule problems from cost problems.
CPI = EV/AC: above 1 is under budget. SPI = EV/PV: above 1 is ahead of schedule. Below 1 is over budget or behind schedule.
No. This is a calculator from the numbers you enter. Tax, legal and investment decisions depend on your full circumstances, so check with a qualified professional for real decisions.
As accurate as the inputs and the stated formula. It is a model with simplifications listed in the limitations; try a range of inputs rather than trusting one figure.
Yes for the maths, which is currency-neutral unless a jurisdiction is stated. Tax rules, thresholds and market conventions differ by country, so check local rules where they matter.