Accounting Chapter 14 2 min read

Accounting Ch14. Cost Accounting and CVP Analysis — Drawing the Map of Profit

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OIYO Editorial Contributor
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Ch 14. Cost Accounting and CVP Analysis

The crown jewel of cost accounting is undoubtedly CVP (Cost-Volume-Profit) analysis. It is the core decision-making tool for answering questions like: how many units must be sold to avoid a loss, or what level of sales is needed to hit a target profit?


1. Understanding Cost Behavior

CVP analysis requires distinguishing how costs change in response to the level of activity (production or sales volume).

Cost Classification: Variable Costs vs Fixed Costs
TypeDefinitionTotal Amount BehaviorPer-Unit Cost Behavior
Variable Cost (VC)Costs that vary in proportion to activity levelIncreases proportionally (↑)Constant (const)
Fixed Cost (FC)Costs that remain unchanged regardless of activity levelConstant (const)Decreases as activity rises (↓)

2. Contribution Margin

Contribution margin is selling price minus variable costs — it represents the amount that contributes to recovering fixed costs and generating profit.

Unit Contribution Margin
Contribution Margin = Sales Revenue − Variable Costs
The amount that contributes to fixed cost recovery with each additional unit sold.

(2) Visual Analysis: The Pressure of Fixed Costs

CVP 분석 시각화: 매출과 총원가의 교차

* 파란색 선(매출)과 주황색 선(원가)이 만나는 지점이 손익분기점(BEP)입니다.


3. Break-Even Point (BEP)

The break-even point is the level at which total sales revenue equals total costs — the point at which profit is zero.

CVP (손익분기점) 계산기

단위당 공헌이익400
공헌이익률40.0%
손익분기점 판매량1,000 units

Interactive Analysis: In the calculator above, try increasing the “fixed costs.” You will see the break-even sales volume jump sharply. This is the essence of leverage and risk.


4. Essential Formula Summary

  1. Break-even sales quantity (Q) = Total Fixed Costs ÷ Unit Contribution Margin
  2. Break-even sales revenue = Total Fixed Costs ÷ Contribution Margin Ratio
  3. Sales quantity for target profit = (Total Fixed Costs + Target Profit) ÷ Unit Contribution Margin

Cost accounting is the process of drawing a management roadmap from numbers. Use CVP analysis to plan a safe and confident business journey.

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