How do semi-fixed (step) costs complicate flexible budgeting and variance analysis?

Advanced

Answer

Step costs stay flat then jump at thresholds (e.g., a new supervisor per shift). When flexing across a step, the higher cost level applies, so the flexed allowance isn't a smooth line. Variances can be misread if the step is ignored—an apparent overspend may simply be a legitimate step increase at higher volume.

Real-world example Adding a shift triggers a step in supervision cost that must be built into the flexed budget at higher volumes.

Common follow-ups: Why isn't the flexed line smooth with step costs? | How can steps be misread as variances?

Types of Budgets Variance Analysis Flexible Budgets

All 34 Flexible Budgets questions