Introduction to Manufacturing Accounts

In your previous chapters, you looked at how a sole trader buys finished goods and sells them for a profit. But what happens if the business actually makes the goods themselves? This is where Manufacturing Accounts come in!

A manufacturing account is prepared to calculate the cost of production—that is, how much it actually cost the business to turn raw materials into finished products. Think of it as a "pre-step" that happens before the Statement of Profit or Loss.

1. The Three Types of Inventory

Unlike a retail shop that just has "inventory," a manufacturer has three different stages of items:

  • Raw Materials: The basic ingredients (e.g., wood for a chair or fabric for a shirt) that haven't been touched yet.
  • Work in Progress (WIP): Partially finished goods that are still on the factory floor at the end of the year.
  • Finished Goods: Completed items ready to be sold to customers.

2. The Structure of a Manufacturing Account

The manufacturing account is broken down into specific subheadings. In the exam, you must use these in the correct order!

A. Raw Materials Consumed

First, we calculate the cost of the materials used up during the year:

\(\text{Opening Inventory of Raw Materials} + \text{Purchases of Raw Materials} + \text{Carriage Inwards on Raw Materials} - \text{Closing Inventory of Raw Materials} = \text{Cost of Raw Materials Consumed}\)

B. Prime Cost

The Prime Cost is the total of all direct costs. These are costs that can be traced directly to a specific unit being made.

  • Direct Materials: (Calculated above).
  • Direct Labour: Wages paid to the people actually making the product (often called factory wages).
  • Direct Expenses: Specific costs like royalties paid to use a design or the hire of a special machine for one job.

The Formula:
\( \text{Raw Materials Consumed} + \text{Direct Labour} + \text{Direct Expenses} = \text{Prime Cost} \)

C. Factory Overheads

These are indirect costs. They are necessary to keep the factory running but aren't tied to one specific item. Examples include:

  • Indirect factory wages (e.g., supervisors or cleaners).
  • Factory rent and rates.
  • Depreciation of factory machinery.
  • Factory fuel and power.

D. Total Production Cost

To find the final cost of the goods completed this year, we must adjust for Work in Progress (WIP):

\( \text{Prime Cost} + \text{Factory Overheads} + \text{Opening Work in Progress} - \text{Closing Work in Progress} = \text{Cost of Production} \)

Quick Review: Think of WIP like a "buffer." We add what was half-finished at the start of the year because we finished it now, and we subtract what is half-finished at the end because it’s not a "completed" cost yet!

3. Allocation and Apportionment

Sometimes a business has costs that cover both the factory (manufacturing) and the office (administration). We need to split these costs between the different functions. This is called apportionment.

How it works:
The exam might say: "Rent is \$10,000. The factory occupies 80% of the space and the office 20%."

  • Factory (Manufacturing Account): \( \$10,000 \times 80\% = \$8,000 \)
  • Office (Statement of Profit or Loss): \( \$10,000 \times 20\% = \$2,000 \)

Common bases for apportionment include floor area (for rent) or number of employees (for canteen costs).

4. Manufacturing Profit and Unrealised Profit

Some businesses don't just transfer goods to the shop at "cost." They add a factory markup. This makes the factory look like a separate profit-making center.

Manufacturing Profit

If the Cost of Production is \( \$100,000 \) and the business adds a \( 10\% \) profit, the goods are transferred to the Statement of Profit or Loss at \( \$110,000 \). The \( \$10,000 \) is the Manufacturing Profit.

Unrealised Profit

Don't worry if this seems tricky at first! The concept of Prudence says we cannot record a profit until a sale is actually made to an outside customer. If the factory "sells" goods to its own shop at a profit, but those goods are still sitting in the shop at the end of the year (Closing Inventory of Finished Goods), that profit hasn't actually been earned yet.

We call this Unrealised Profit. We must remove it from the value of the inventory using a Provision for Unrealised Profit account.

Calculation Tip:
If goods are valued at "Cost + Markup," use this formula to find the profit element in the inventory:
\( \text{Unrealised Profit} = \text{Value of Inventory} \times \frac{\text{Markup}}{100 + \text{Markup}} \)

5. Linking to Financial Statements

Once you finish the Manufacturing Account, where do the numbers go?

  • The Cost of Production (at transfer price) becomes the "purchases" figure in your Statement of Profit or Loss.
  • The Manufacturing Profit is added to the Gross Profit in the Statement of Profit or Loss.
  • In the Statement of Financial Position, all three types of inventory are listed under Current Assets, but Finished Goods must be shown minus the Provision for Unrealised Profit.

Common Mistakes to Avoid

  • Carriage Outwards: This is a selling expense, not a manufacturing cost. It goes in the Statement of Profit or Loss, not the Manufacturing Account. (Only Carriage Inwards on raw materials goes in the Manufacturing Account).
  • Mixing up Direct and Indirect: Remember, if it's "Factory Rent," it's an overhead. If it's "Factory Wages for Assembly Workers," it's a direct cost (Prime Cost).
  • Inventory Names: Always use the full term, e.g., "Closing Inventory of Raw Materials," to ensure you get full marks for terminology.

Key Takeaways

1. Prime Cost = Direct Materials + Direct Labour + Direct Expenses.
2. Cost of Production = Prime Cost + Factory Overheads + Opening WIP - Closing WIP.
3. Apportionment: Split costs between the factory and office based on the usage given.
4. IAS Terminology: Always use "Inventory," "Revenue," and "Statement of Financial Position."