When is VAC negative?

Whenever EAC exceeds BAC — the project is forecast to overrun the original budget.

Forecasting

VAC Calculator

Calculate Variance at Completion (VAC) to forecast the final cost variance vs. the original budget.

Calculator

VAC = BAC − EAC

Budget at Completion (BAC)

Estimate at Completion (EAC)

Enter values to compute.

Interpretation Guide

VAC > 0Project forecast to finish under budget.
VAC ≈ 0Forecast on budget.
VAC < 0Forecast over budget — recovery needed.

Example

BAC $500k, EAC $600k → VAC = −$100k.

Real-world use cases

Executive forecasting
Funding requests
Portfolio rebaseline decisions

Common mistakes

Reporting VAC without disclosing EAC method

Professional tips

Show VAC trend over reporting periods

FAQ

Frequently asked questions

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