Form 5 · Chapter 7

Cost Accounting

Perakaunan Kos

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What this chapter covers

Form 5 Chapter 7, Cost Accounting, moves you from the world of the retailer, who only buys and resells finished goods, to the world of the manufacturer, who makes the goods it sells. Throughout Form 4 and the earlier Form 5 chapters, a firm's trading account rested on one simple figure: Purchases of finished goods. But a factory does not buy finished products for resale; it buys raw materials, pays labour, incurs factory overheads and produces its own goods. The Purchases figure is therefore replaced by a Cost of Production figure, which must first be calculated in a special statement called the Manufacturing Account. This chapter teaches you to calculate that cost, and then to use cost information to make decisions through Break-even Point Analysis.

Following the KSSM content standards (Standard Kandungan), this chapter covers three broad parts: first, the types of cost (direct and indirect costs, fixed and variable costs) together with the concept of Work in Progress, or partly finished goods; second, the preparation of the Manufacturing Account to arrive at prime cost and the production cost of finished goods; and third, Break-even Point Analysis, which finds the level of sales at which the firm makes neither a profit nor a loss. The three parts are linked: you must be able to classify costs before you can arrange them in the Manufacturing Account, and you must separate fixed from variable costs before you can compute the break-even point.

In the accounting cycle, the Manufacturing Account comes before the Income Statement. The cost of production calculated in the Manufacturing Account is transferred to the trading section of the Income Statement, replacing Purchases. Gross profit and profit for the year are then found as usual, and asset and liability balances are carried to the Statement of Financial Position. This chapter is therefore not an isolated topic; it leads straight into the preparation of financial statements you have already studied, with one extra statement in front. It also shows where the cost of a product comes from and how that cost drives pricing and sales decisions.

Content Standards

16.1 Types of Costs and Work in Progress

Jenis kos dan Kerja Dalam Proses

Learning Standards (official DSKP wording, in Malay)

16.1.1Menyatakan konsep kos dan jenis kos
16.1.2Menyenaraikan komponen kos pengeluaran
16.1.3Mengira: (i) Kos Bahan Langsung. (ii) Kos Buruh Langsung. (iii) Kos Belanja Langsung. (iv) Kos Prima. (v) Kos Overhed
16.1.4Menerangkan maksud Kerja Dalam Proses Awal dan Kerja Dalam Proses Akhir
16.1.5Mengira setiap komponen kos pengeluaran dengan mengambil kira Kerja Dalam Proses

16.2 Manufacturing Account

Akaun Pengeluaran

Learning Standards (official DSKP wording, in Malay)

16.2.1Menyatakan tujuan penyediaan Akaun Pengeluaran
16.2.2Menyediakan Akaun Pengeluaran tanpa mengambil kira Kerja Dalam Proses Awal dan Kerja Dalam Proses Akhir dalam bentuk ’T’ dan format penyata
16.2.3Menghasilkan Akaun Pengeluaran dengan mengambil kira Kerja Dalam Proses Awal dan Kerja Dalam Proses Akhir dalam bentuk ’T’ dan format penyata
16.2.4Memindahkan Kos Pengeluaran daripada Akaun Pengeluaran ke Akaun Perdagangan
16.2.5Merumuskan justifikasi pengagihan sebahagian daripada kos ke Penyata Kos Pengeluaran dan Penyata Pendapatan

16.3 Break-even Point Analysis

Analisis Titik Pulang Modal

Learning Standards (official DSKP wording, in Malay)

16.3.1Menerangkan maksud: (i) Analisis Titik Pulang Modal (ii) Kos Tetap, Kos Berubah dan Margin Caruman
16.3.2Mengira: (i) Kos Tetap (ii) Kos Berubah (iii) Jumlah kos (iv) Jumlah hasil (v) Margin Caruman Seunit. (vi) Titik Pulang Modal menggunakan Kaedah Margin Caruman
16.3.3Menganalisis Titik Pulang Modal dengan mengambil kira perubahan pada salah satu komponen kos dan harga jualan
16.3.4Menentukan keuntungan berdasarkan kuantiti yang disasarkan dengan menggunakan Kaedah Margin Caruman
16.3.5Menjana kuantiti yang perlu dikeluarkan untuk mencapai untung sasaran yang ditetapkan berdasarkan sesuatu situasi
16.3.6Menyelesaikan masalah pulangan modal yang dihadapi oleh sesebuah firma dengan menggunakan analisis Titik Pulang Modal
16.3.7Melakar graf Titik Pulang Modal
16.3.8Menentukan Titik Pulang Modal dengan menggunakan Kaedah Graf
16.3.9Menganalisis Titik Pulang Modal menggunakan kaedah graf
16.3.10Menjana keuntungan berdasarkan kuantiti yang disasarkan dengan menggunakan Kaedah Graf

Source: DSKP KSSM Prinsip Perakaunan Tingkatan 5

Key ideas in this chapter

Direct versus indirect costs

A direct cost can be traced straight to the product being made, while an indirect cost cannot be traced directly and is shared by all products. The three main direct costs are direct materials, direct labour (wages of workers directly involved in making the product), and direct expenses (for example, the hire of a special machine for one order). All indirect factory costs are gathered together as production overheads, such as supervisors' wages, factory rent, depreciation of machinery, and factory insurance.

Example: a furniture factory buys timber RM8,000 (direct materials), pays a carpenter RM3,000 (direct labour), and hires a special carving machine RM500 (direct expense). All three are direct costs. An office clerk's salary of RM1,200 is neither a direct cost nor a factory overhead; it is an administrative expense that goes into the Income Statement, not the Manufacturing Account.

Fixed, variable and semi-variable costs

A fixed cost stays the same in total whether output rises or falls, for example factory rent of RM2,000 a month whether the firm makes 100 or 1,000 units. A variable cost changes with the quantity produced, for example raw materials: the more units made, the more material used. A semi-variable cost contains both elements, for example an electricity bill with a fixed charge plus a usage charge.

Example: if raw material costs RM4 per unit and the firm makes 500 units, the variable material cost is RM2,000; if it makes 800 units, it rises to RM3,200. Factory rent of RM2,000 does not change in either case. This classification matters because you must separate variable from fixed costs to compute the contribution margin and the break-even point later.

Work in Progress (partly finished goods)

At the end of an accounting period there are usually still products not fully completed on the factory floor, called Work in Progress. Opening work in progress (partly finished goods from the previous period) is added in the Manufacturing Account, while closing work in progress (goods still unfinished at the year end) is deducted, because its cost has not yet become the cost of finished goods.

Example: cost of production before adjustment is RM50,000. Opening work in progress RM3,000 is added and closing work in progress RM4,000 is deducted: RM50,000 + RM3,000 - RM4,000 = RM49,000 production cost of finished goods. If you forget to adjust for work in progress, your cost of production will be wrong and, in turn, so will gross profit.

Calculating cost of raw materials consumed

The first step in the Manufacturing Account is to calculate the cost of raw materials consumed, not the cost of materials bought. The formula is: Opening inventory of raw materials + Purchases of raw materials + Carriage inwards on raw materials - Returns outwards of raw materials - Closing inventory of raw materials = Cost of raw materials consumed.

Example: Opening raw materials RM5,000, purchases of raw materials RM20,000, carriage inwards RM1,000, and closing raw materials RM6,000. Cost of raw materials consumed = RM5,000 + RM20,000 + RM1,000 - RM6,000 = RM20,000. Note that carriage inwards on raw materials goes here, not into administrative expenses, because it is part of the cost of obtaining the materials.

Prime cost

Prime cost is the total of all direct costs. The formula is: Cost of raw materials consumed + Direct labour + Direct expenses = Prime cost. It represents the core cost of the product before any factory overhead is added, and always appears as a clear subtotal in the Manufacturing Account.

Example: cost of raw materials consumed RM20,000, direct wages RM12,000, and direct expenses (a royalty per unit) RM1,500. Prime cost = RM20,000 + RM12,000 + RM1,500 = RM33,500. A common mistake is to include supervisors' wages (an indirect cost) in direct wages, which wrongly inflates prime cost.

Production overheads and cost of production

After prime cost, all indirect factory costs are gathered as production overheads, for example indirect wages, factory rent, factory rates, depreciation of plant and machinery, factory power and fuel, and factory insurance. Prime cost plus production overheads gives the cost of production before the work in progress adjustment. After adjusting for opening and closing work in progress, you obtain the production cost of finished goods, which is transferred to the Income Statement.

Example: prime cost RM33,500, production overheads RM16,500, giving RM50,000. Add opening work in progress RM3,000, deduct closing work in progress RM4,000: production cost of finished goods = RM49,000. It is this RM49,000 that replaces Purchases in the trading section of the Income Statement.

The contribution margin concept

Before you can compute the break-even point, you need the contribution margin, which is selling price per unit minus variable cost per unit. The contribution margin is the amount each unit contributes towards covering fixed costs; once all fixed costs are covered, every additional unit contributes straight to profit.

Example: selling price RM20 per unit and variable cost RM12 per unit. Contribution margin per unit = RM20 - RM12 = RM8. This means every unit sold contributes RM8 towards paying fixed costs. The contribution margin ratio = RM8 / RM20 = 0.4 or 40%, which is useful for computing the break-even point in ringgit value.

Break-even point and margin of safety

The break-even point is the level of sales where total revenue equals total cost, so the firm makes neither a profit nor a loss. Unit formula: Break-even point (units) = Fixed cost / Contribution margin per unit. Value formula: Fixed cost / Contribution margin ratio. The margin of safety is actual sales minus break-even sales, showing how far sales can fall before the firm starts to make a loss.

Example: fixed cost RM24,000 and contribution margin RM8 per unit. Break-even point = RM24,000 / RM8 = 3,000 units, or in value RM24,000 / 0.4 = RM60,000. If actual sales are 4,000 units (RM80,000), the margin of safety = RM80,000 - RM60,000 = RM20,000, that is 1,000 units. To reach a target profit of RM8,000: (RM24,000 + RM8,000) / RM8 = 4,000 units.

Reading the break-even chart

A break-even chart plots the total revenue line and the total cost line on the same axes, with quantity on the horizontal axis and ringgit value on the vertical axis. The fixed cost line is horizontal; the total cost line starts at the fixed cost level and rises with variable cost; the revenue line starts at zero. The point where the revenue line crosses the total cost line is the break-even point.

The area between the revenue line and the total cost line to the left of the intersection shows a loss, and to the right shows a profit. Reading the chart correctly lets you state the break-even point in units and ringgit visually, and explain the effect if fixed costs rise (the break-even point shifts right) or the selling price rises (the break-even point shifts left).

Common mistakes

Study plan for this chapter

Start with cost classification: make a two-column table to label each cost as direct or indirect, then another for fixed or variable, until you can classify any cost quickly.
Memorise and practise the order of the Manufacturing Account from top to bottom: cost of raw materials consumed, prime cost, production overheads, work in progress adjustment, production cost of finished goods.
Work through at least five complete Manufacturing Accounts with different figures, each time checking that your production cost of finished goods is correctly transferred to replace Purchases in the Income Statement.
Do separate contribution margin drills: compute the contribution margin per unit and the contribution margin ratio for several sets of prices and variable costs until the formula becomes automatic.
Practise all three break-even formulas (units, ringgit, and target profit) together with the margin of safety, and state answers in full sentences, not just figures.
Draw two or three break-even charts by hand, labelling all lines and axes correctly, and mark the profit and loss areas.
Finally, do mixed exercises that combine the Manufacturing Account and break-even analysis in one question, to check that you can switch between the two skills under time pressure.

FAQ

What is the difference between the Manufacturing Account and the Income Statement?

The Manufacturing Account calculates the cost of making finished goods (the cost of production) for a manufacturing firm, while the Income Statement calculates gross profit and profit for the year. The cost of production from the Manufacturing Account is transferred to the trading section of the Income Statement, replacing Purchases, so the Manufacturing Account is prepared first, then the Income Statement.

Why is work in progress added at the start and deducted at the end?

Opening work in progress is partly finished goods from the previous period completed this year, so its cost contributes to this year's finished goods and is added. Closing work in progress is this year's partly finished goods not yet completed, so its cost has not yet become the cost of finished goods and is deducted.

How do I quickly distinguish direct from indirect costs?

Ask whether the cost can be traced straight to one unit of product. If yes, for example raw materials and production workers' wages, it is a direct cost. If it is shared by all products and cannot be traced to one unit, for example factory rent and machinery depreciation, it is an indirect cost or overhead.

What does the break-even point mean and why does it matter?

The break-even point is the level of sales where revenue equals cost, so the firm neither profits nor loses. It matters because it tells the owner the minimum units or ringgit of sales needed before the firm starts to earn a profit, helping decisions on pricing and sales targets.

Is the contribution margin the same as profit?

No. The contribution margin is selling price per unit minus variable cost per unit, that is each unit's contribution towards covering fixed costs. Profit only arises once total contribution margin exceeds total fixed costs; before that the firm is still covering its fixed costs.

I get confused by the order of the Manufacturing Account. Where can I get help?

Many students lose marks by ordering the costs wrongly or forgetting the work in progress adjustment. We offer 1-to-1 tuition with experienced teachers, with a paid trial session from RM50/hour; WhatsApp if you want step-by-step guidance.

Learning materials for this chapter

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