What is the main purpose of marginal costing?

What is the main purpose of marginal costing?

• A. Calculating tax payable
• B. Preparing annual financial statements
• C. Computing depreciation
• D. Aiding decision making

Answer: (D)

Marginal costing concentrates on what changes when output changes and looks at the costs that vary with volume. It highlights the contribution each unit makes by subtracting variable costs from the selling price. This focus on incremental revenue versus incremental costs lets managers judge short‑term choices—will accepting a special order, changing the price, or choosing between alternatives add to fixed costs and profit? Since fixed costs are not affected by a small change in output, they aren’t the basis for these decisions; what matters is whether the extra revenue covers the extra variable costs. That’s why its main purpose is to aid decision making. It’s not primarily about tax payable, preparing annual financial statements, or computing depreciation, which belong to financial accounting and asset valuation rather than this short‑term, decision‑oriented analysis.

Marginal costing concentrates on what changes when output changes and looks at the costs that vary with volume. It highlights the contribution each unit makes by subtracting variable costs from the selling price. This focus on incremental revenue versus incremental costs lets managers judge short‑term choices—will accepting a special order, changing the price, or choosing between alternatives add to fixed costs and profit? Since fixed costs are not affected by a small change in output, they aren’t the basis for these decisions; what matters is whether the extra revenue covers the extra variable costs. That’s why its main purpose is to aid decision making. It’s not primarily about tax payable, preparing annual financial statements, or computing depreciation, which belong to financial accounting and asset valuation rather than this short‑term, decision‑oriented analysis.