Which statement is true about marginal costing for decision making?

Which statement is true about marginal costing for decision making?

• A. It is appropriate for decision making; fixed costs are treated according to their nature.
• B. Fixed costs are ignored entirely in decision making.
• C. Profit is determined solely by production volume.
• D. It always aligns with IAS 2.

Answer: (A)

The idea being tested is using marginal costing for short‑term decisions, where you focus on the costs that will actually change with the chosen action. In this approach, variable costs are treated as the cost of producing units, while fixed costs are not allocated to products but treated as period costs. That means decisions are evaluated on incremental revenues versus incremental variable costs, with fixed costs seen as already sunk if they won’t change with the decision. This makes the approach appropriate for decision making, and the fixed costs are handled according to their nature (fixed, not tied to the production decision) rather than being attached to each unit. Fixed costs aren’t ignored entirely—they still exist and affect overall profitability, but they don’t drive the incremental decision in the short term. Profit isn’t determined solely by production volume, since prices and variable costs also matter for the decision’s added value. And marginal costing isn’t guaranteed to align with IAS 2, which uses absorption costing for inventory valuation in external reporting.

The idea being tested is using marginal costing for short‑term decisions, where you focus on the costs that will actually change with the chosen action. In this approach, variable costs are treated as the cost of producing units, while fixed costs are not allocated to products but treated as period costs. That means decisions are evaluated on incremental revenues versus incremental variable costs, with fixed costs seen as already sunk if they won’t change with the decision. This makes the approach appropriate for decision making, and the fixed costs are handled according to their nature (fixed, not tied to the production decision) rather than being attached to each unit.

Fixed costs aren’t ignored entirely—they still exist and affect overall profitability, but they don’t drive the incremental decision in the short term. Profit isn’t determined solely by production volume, since prices and variable costs also matter for the decision’s added value. And marginal costing isn’t guaranteed to align with IAS 2, which uses absorption costing for inventory valuation in external reporting.