Cost Accounting · Introduction to Cost Accounting

How to Prepare a Cost Sheet and Understand Elements of Cost

Updated 10 October 2026 · Fact-checked

A cost sheet is a statement that shows total cost and cost per unit, built up in stages. Start with direct material, direct labour and direct expenses to get prime cost. Add factory overheads, adjust for work-in-progress, add office overheads, adjust finished goods, then add selling and distribution overheads to reach cost of sales.

Understand Cost Sheet and Elements of Cost

Every cost belongs to one of three elements of cost: material, labour and expenses. Each element can be direct (traceable to a unit of product) or indirect (shared, so it becomes an overhead). That gives six building blocks: direct material, direct labour, direct expenses, and indirect material, indirect labour and indirect expenses.

A cost sheet stacks these blocks in the order in which the cost is incurred. Each subtotal has a name and a meaning. Direct costs give prime cost. Adding factory overheads gives factory cost. Adding office and administration overheads gives cost of production. Adding selling and distribution overheads gives cost of sales. Profit is then added to cost of sales to reach sales.

Stock changes are adjusted at the right level. Opening and closing work-in-progress (WIP) are adjusted after factory overheads. Opening and closing finished goods are adjusted after cost of production, to get cost of goods sold. Raw material stock is adjusted at the very start, when you compute material consumed.

Conversion cost is the cost of turning raw material into finished goods. It is direct labour plus direct expenses plus factory overheads. It excludes direct material. Prime cost and conversion cost overlap, because direct labour and direct expenses sit in both. Read the question for any special definition it gives.

The cost sheet usually has two columns: total amount and cost per unit. Per-unit figures are total cost divided by units. Use units produced up to cost of production, and units sold for cost of goods sold and cost of sales.

Key rules to remember

Direct material consumed: Opening stock of raw material + Purchases + Carriage inward (and other purchase costs) − Closing stock of raw material; Deduct trade discount and add freight and duty on purchases. Do not add carriage outward here.
Prime cost: Direct material consumed + Direct labour + Direct expenses; Includes only direct costs.
Gross factory cost: Prime cost + Factory overheads; Factory overheads include indirect material, indirect labour, factory rent, power and depreciation of factory assets.
Factory cost (works cost): Gross factory cost + Opening WIP − Closing WIP; Adjust WIP only at this stage.
Cost of production: Factory cost + Office and administration overheads; Adjust for scrap or by-product credit if the question gives it.
Cost of goods sold: Cost of production + Opening finished goods − Closing finished goods; Value finished goods at cost of production, not selling price.
Cost of sales: Cost of goods sold + Selling and distribution overheads; This is the full cost. Profit is added to this figure.
Sales: Cost of sales + Profit; If profit is given as a percentage of sales, then profit = % ÷ (100 − %) of cost of sales.
Conversion cost: Direct labour + Direct expenses + Factory overheads; Excludes direct material. Use the question's definition if it states one.
Cost per unit: Total cost at that level ÷ Units; Units produced for cost of production, units sold for cost of sales.

How to solve Cost Sheet and Elements of Cost questions

Use this order for any cost sheet question. It keeps every adjustment at the right level and picks up the step marks.

1Read the data and tag every item as material, labour, expense, or not a cost at all (for example, interest, income tax, donations, and purely financial items).
2Classify each item as direct or indirect, then as factory, office and administration, or selling and distribution.
3Compute direct material consumed from opening stock, purchases, carriage inward and closing stock. Show this as a working note.
4Write the format from the top. Direct material, direct labour, direct expenses, then prime cost.
5Add factory overheads, then adjust opening and closing WIP to reach factory cost.
6Add office overheads to get cost of production. Adjust opening and closing finished goods to get cost of goods sold.
7Add selling and distribution overheads for cost of sales. Add profit to reach sales, or deduct cost of sales from sales to find profit.
8Add a per-unit column if units are given, and check that the total ties back to the data.

Quickest way: Subtotal ladder method

When to use it: Use it when the cost sheet is simple and time is short. It works well when no WIP is given and the question asks for just one subtotal.

Write the ladder in the margin: Prime, Factory, Production, COGS, Sales cost.
Sort the items once into direct and the three overhead groups, and cross out non-cost items.
Add upwards, one subtotal at a time, and write only the figures, with a short working for materials consumed.
Stop at the subtotal asked. If the question wants the cost of production, you need not compute selling overheads.
For per-unit answers, divide only at the end, using the correct unit base.

Common mistakes in Cost Sheet and Elements of Cost

Including non-cost items such as interest paid, income tax, donations or loss on sale of assets in the cost sheet.
Students copy every item from the profit and loss account.
Fix: Cost sheets show costs of production and sale only. Exclude purely financial items and appropriations unless the question says to include them.
Adjusting WIP and finished goods at the wrong stage.
Students are not sure which subtotal each stock belongs to.
Fix: WIP is adjusted after factory overheads. Finished goods are adjusted after cost of production. Raw material is adjusted in the consumption working.
Treating carriage inward and carriage outward the same way.
Both are called carriage.
Fix: Carriage inward is part of material cost. Carriage outward is a selling and distribution overhead.
Dividing total cost by units sold when the cost of production is asked.
Students use one unit figure for every level.
Fix: Use units produced for cost of production. Use units sold for cost of sales. Value closing finished goods at cost of production per unit.
Taking profit on sales as if it were profit on cost.
Students apply the percentage to the wrong base.
Fix: If profit is 20% on sales, then cost is 80% of sales. Sales = cost of sales ÷ 0.80, which equals cost of sales plus 25% of cost.
Confusing conversion cost with prime cost.
Direct labour appears in both.
Fix: Prime cost has direct material but no overheads. Conversion cost has factory overheads but no direct material.

Worked examples

Example 1

From the data of Sharma Industries for the year, prepare a cost sheet showing prime cost, factory cost, cost of production, cost of goods sold, cost of sales and profit. Opening raw material ₹2,00,000; purchases ₹8,00,000; carriage inward ₹20,000; closing raw material ₹1,20,000; direct wages ₹3,00,000; direct expenses ₹40,000; factory overheads ₹1,60,000; opening WIP ₹50,000; closing WIP ₹30,000; office and administration overheads ₹90,000; opening finished goods ₹70,000; closing finished goods ₹1,10,000; selling and distribution overheads ₹1,20,000; sales ₹18,00,000. Also find the conversion cost.

Show the solution

Material consumed = 2,00,000 + 8,00,000 + 20,000 − 1,20,000 = ₹9,00,000.
Prime cost = 9,00,000 + 3,00,000 + 40,000 = ₹12,40,000.
Gross factory cost = 12,40,000 + 1,60,000 = ₹14,00,000.
Factory cost = 14,00,000 + 50,000 − 30,000 = ₹14,20,000.
Cost of production = 14,20,000 + 90,000 = ₹15,10,000.
Cost of goods sold = 15,10,000 + 70,000 − 1,10,000 = ₹14,70,000.
Cost of sales = 14,70,000 + 1,20,000 = ₹15,90,000.
Profit = 18,00,000 − 15,90,000 = ₹2,10,000.
Conversion cost = 3,00,000 + 40,000 + 1,60,000 = ₹5,00,000.

Answer: Prime cost ₹12,40,000; factory cost ₹14,20,000; cost of production ₹15,10,000; cost of goods sold ₹14,70,000; cost of sales ₹15,90,000; profit ₹2,10,000; conversion cost ₹5,00,000.

Example 2

Mehta Plastics produced 10,000 units and sold 8,000 units in its first year. Direct material ₹4,00,000; direct wages ₹2,00,000; factory overheads are 50% of direct wages; office and administration overheads ₹1,50,000; selling overheads ₹5 per unit sold. There was no WIP. Profit is 20% on sales. Find the cost per unit of production, the value of closing finished goods, cost of sales, and total and per-unit selling price.

Show the solution

Prime cost = 4,00,000 + 2,00,000 = ₹6,00,000.
Factory overheads = 50% × 2,00,000 = ₹1,00,000. Factory cost = 6,00,000 + 1,00,000 = ₹7,00,000.
Cost of production = 7,00,000 + 1,50,000 = ₹8,50,000. Cost per unit = 8,50,000 ÷ 10,000 = ₹85.
Closing finished goods = 2,000 units × ₹85 = ₹1,70,000.
Cost of goods sold = 8,000 × 85 = ₹6,80,000.
Selling overheads = 8,000 × ₹5 = ₹40,000. Cost of sales = 6,80,000 + 40,000 = ₹7,20,000.
Profit is 20% on sales, so cost of sales is 80% of sales. Sales = 7,20,000 ÷ 0.80 = ₹9,00,000. Profit = ₹1,80,000.
Selling price per unit = 9,00,000 ÷ 8,000 = ₹112.50.

Answer: Cost per unit of production ₹85; closing finished goods ₹1,70,000; cost of sales ₹7,20,000; sales ₹9,00,000; selling price ₹112.50 per unit.

Exam tips

Draw the full format first, with its subtotal names, and fill it in. Examiners give marks for each correct subtotal even if a later figure is wrong.
Show materials consumed as a working note. It is often worth marks on its own.
Read the data for traps such as carriage outward, interest, bad debts, and sales returns, and say how you treated each.
In per-unit questions, state the unit base you used (produced or sold). Value closing finished goods at cost of production.
In MCQs, check which level is asked. Prime cost, factory cost, cost of production and cost of sales differ by one adjustment each, so the wrong options are usually a missed WIP or stock adjustment.

Practice questions from Introduction to Cost Accounting

Cost Sheet and Elements of Cost in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Cost Sheet and Elements of Cost: frequently asked questions

What is the difference between prime cost and conversion cost?

Prime cost is direct material plus direct labour plus direct expenses. Conversion cost is direct labour plus direct expenses plus factory overheads. Direct material is only in prime cost, and factory overheads are only in conversion cost.

What is the difference between cost of production and cost of sales?

Cost of production is factory cost plus office and administration overheads. Cost of sales is cost of goods sold plus selling and distribution overheads. Cost of sales is the total cost of the units sold, so it also reflects opening and closing finished goods.

Where do I adjust opening and closing stock in a cost sheet?

Raw material stock is adjusted while computing material consumed. WIP is adjusted after factory overheads to get factory cost. Finished goods are adjusted after cost of production to get cost of goods sold.

Are selling and distribution overheads included in cost of production?

No. Cost of production includes factory and office and administration overheads only. Selling and distribution overheads are added later to reach cost of sales.