How to Create a Cost Variance Trend Chart in Power BI

Reporting a single cost variance figure is not enough. A snapshot of the up-to-date variance may show "$1M,” but it hides the bigger picture.

A trend chart reveals:

Normal fluctuations from delays and recovery measures

Healthy cycles of falling behind, correcting, and regaining momentum

Warning signs when variance keeps worsening without recovery

In one case, variance shifted from $1M to $2M in just four weeks — a signal that static reporting would miss.

Power BI makes this analysis practical with filters, tooltips, and variance percentages, helping teams see not just the numbers, but the story behind them.