What is the difference between ETC and EAC?

ETC is the forecast for remaining work only. EAC = AC + ETC is the forecast for the total project.

Forecasting

ETC Calculator

Forecast the cost required to complete the remaining work using the standard EVM ETC formula.

Calculator

ETC = (BAC − EV) / CPI

Budget at Completion (BAC)

Earned Value (EV)

Actual Cost (AC)

Enter values to compute.

Interpretation Guide

ETC ≤ Budget remainingRemaining work fits within remaining budget.
ETC > Budget remainingForecast overrun on remaining scope.

Example

BAC $500k, EV $200k, AC $240k → CPI 0.83, ETC = 300k / 0.83 ≈ $361k.

Real-world use cases

Cashflow planning
Funding requests
Cost-to-go reporting

Common mistakes

Using BAC − AC instead of the CPI-adjusted formula

Professional tips

Validate ETC against a bottom-up estimate quarterly

FAQ

Frequently asked questions

Related tools

Continue exploring

EAC Forecast Calculator

Estimate at Completion — forecast final project cost.

TCPI Calculator

To-Complete Performance Index — required efficiency to finish on budget.

VAC Calculator

Variance at Completion forecast.

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