Budgeting & Forecasting › Flexible Budgets

What is the high-low method for splitting semi-variable costs?

Intermediate

Answer

The high-low method estimates the variable cost per unit from the highest and lowest activity levels: variable cost per unit = (cost at high - cost at low) / (units at high - units at low). Fixed cost is then total cost minus variable cost at either level. It's simple but relies on only two points, so it can be inaccurate.
VC/unit = (High cost - Low cost) / (High units - Low units).
Real-world example Using the busiest and quietest months, the analyst splits the mixed maintenance cost into fixed and variable parts.

Common follow-ups: What are the limitations of high-low? | How is fixed cost derived?