Module 18 — Management Accounting for CFOs

Costing, contribution analysis, pricing decisions, and the management accounting toolkit that connects financial data to operational decisions.

Learning Objectives

Apply marginal and absorption costing to product and service decisions
Conduct breakeven and contribution analysis for pricing decisions
Identify relevant costs for make vs buy and outsourcing decisions
Use activity-based costing to understand true product profitability
Design management accounting reports that drive operational decisions

1. Cost Classification

Fixed vs Variable vs Semi-Variable Costs

Type	Behaviour	Example
Fixed	Constant regardless of volume	Rent, depreciation, management salaries
Variable	Proportional to volume	Raw materials, direct labour (if paid per unit), commissions
Semi-variable	Fixed element plus variable	Utilities, telephone, maintenance contracts

Direct vs Indirect Costs

Direct costs: Traceable specifically to a product/service — direct materials, direct labour
Indirect costs (overheads): Cannot be directly traced — allocated/absorbed using a basis

Sunk Costs vs Relevant Costs — The CFO Decision Filter

Sunk costs are past expenditures that cannot be recovered — irrelevant to future decisions regardless of size. The psychological pull of sunk costs ("we've already spent PKR 50M on this project") is one of the most dangerous biases in capital allocation.

Relevant costs for a decision are:

Future (not past)
Incremental (change as a result of the decision)
Cash flows (not accounting allocations)

2. Marginal vs Absorption Costing

Mechanics

Marginal costing: Only variable production costs included in product cost. Fixed overheads treated as period costs — expensed in full regardless of inventory levels.

Absorption costing: Fixed production overheads absorbed into product cost using a pre-determined overhead absorption rate (OAR).

OAR = Budgeted fixed overhead / Budgeted activity level

Profit Difference and Inventory Valuation Impact

If inventory increases: Absorption profit > Marginal profit
                        (fixed costs carried in inventory, not expensed)
If inventory decreases: Absorption profit < Marginal profit
If inventory unchanged: Profits are equal

IFRS Requirement

IAS 2 (Inventories) requires absorption costing for financial reporting — fixed production overheads must be included in inventory cost. Marginal costing is for internal management decisions only.

3. Contribution Analysis

Contribution Formula

Contribution = Revenue − Variable Costs
Contribution per unit = Selling price − Variable cost per unit
Contribution margin ratio (C/S ratio) = Contribution / Revenue

Multi-Product Contribution Analysis

When selling multiple products, calculate contribution per unit for each. Used to rank products by profitability and inform pricing decisions.

Limiting Factor Analysis — Optimizing Scarce Resources

When one resource is scarce (machine hours, skilled labour, raw material), maximize contribution per unit of the limiting factor:

Rank products by: Contribution per unit / Units of limiting factor consumed

Produce in order of ranking until the limiting factor is exhausted.

4. Breakeven Analysis

Breakeven Point

Breakeven (units) = Fixed Costs / Contribution per unit
Breakeven (revenue) = Fixed Costs / C/S ratio

Margin of Safety

Margin of Safety = Budgeted sales − Breakeven sales
Margin of Safety % = Margin of Safety / Budgeted sales × 100

A higher margin of safety means more buffer before losses begin.

Target Profit Analysis

Units required for target profit = (Fixed Costs + Target Profit) / Contribution per unit

Operating Leverage and Risk

High fixed cost businesses have high operating leverage — small revenue changes produce large profit changes (amplified in both directions). Relevant when assessing acquisition targets or evaluating business model changes.

5. Activity-Based Costing (ABC)

Why Traditional Costing Distorts Product Profitability

Traditional costing allocates overheads on a single basis (e.g., machine hours). This over-costs high-volume simple products and under-costs low-volume complex products that consume disproportionate support activity.

Cost Pools and Cost Drivers

Cost Pool	Cost Driver
Customer support	Number of customer support tickets
Order processing	Number of orders
Quality inspection	Number of inspection hours
Supplier management	Number of suppliers

ABC Implementation in Service Businesses

ABC is particularly valuable in professional services where time is the critical resource:

Law firms: cost pool by practice area, driver: billable hours
Advisory firms: cost pool by service line, driver: engagement hours

Time-Driven ABC

A simplified ABC variant: assign costs based on time required for each activity. Easier to maintain and update as business processes change.

6. Relevant Costs for CFO Decisions

Make vs Buy Analysis

Compare:

Make: Incremental costs of internal production (materials, labour, variable overheads, any additional fixed costs)
Buy: External supplier price + any additional costs (delivery, quality management)
Qualitative factors: Capacity flexibility, IP protection, supplier reliability, strategic capability retention

Outsourcing Decisions

Beyond the make vs buy calculation, consider:

Transition costs (one-off)
Lost internal capability (hard to reverse)
Dependency risk on external provider
Quality control loss

Shut Down vs Continue a Division

Shut down if: Contribution from division < Avoidable fixed costs of that division

A division showing a net loss may still be worth retaining if its contribution covers some shared fixed costs — and those fixed costs would not disappear on closure.

Pricing Special Orders Below Full Cost

Accept a special order below full absorption cost if:

Order uses spare capacity (no opportunity cost)
Incremental revenue > incremental variable costs
Order does not undercut regular customers or set a pricing precedent

7. Transfer Pricing (Management Perspective)

Internal Transfer Pricing — Three Methods

Method	Formula	Best When
Cost-based	Marginal cost or full cost	Selling division has no external market
Market-based	External market price	Competitive external market exists
Negotiated	Between cost and market price	Both divisions have market access

The General Transfer Pricing Rule

Minimum transfer price = Marginal cost + Opportunity cost (lost contribution from external sales)

If the selling division has spare capacity: minimum price = marginal cost only If the selling division is at full capacity: minimum price = marginal cost + contribution foregone on displaced external sales

Divisional Performance Measurement

Transfer pricing directly affects divisional P&L — an unfair transfer price distorts performance measurement and damages manager motivation. The CFO must ensure transfer pricing policies are commercially logical and consistently applied.

Self-Assessment

A product sells for PKR 500. Variable costs are PKR 300 per unit. Fixed costs are PKR 2,000,000. Calculate breakeven volume, breakeven revenue, and the margin of safety if budgeted sales are 15,000 units.
Your factory has 10,000 machine hours available. Product A uses 2 hours/unit with contribution PKR 100. Product B uses 1 hour/unit with contribution PKR 60. Determine the optimal production mix.
A division shows a net loss of PKR 5M. Its contribution is PKR 8M, and avoidable fixed costs if the division closes are PKR 3M. Should the division be shut down?
Your purchasing team recommends outsourcing component manufacturing to an external supplier at PKR 200/unit vs internal cost of PKR 220/unit (PKR 150 variable + PKR 70 fixed overhead allocation). The fixed overhead is not avoidable. What is the correct analysis?