Incomplete records: worked examples

Method and where the marks are

In an incomplete records question, the business has not kept full double-entry books, often only a cash book and a few notes. You rebuild the missing figures from what you are given. The marks come from showing your logic, not from guessing.

You need two tools. The first is the accounting equation, used to find capital or profit.

The second is total accounts, which work like control accounts and find missing sales, purchases or a cash figure. Decide early which tool the question needs.

When you are given assets and liabilities at the start and end of the year but no income statement, use the statement of affairs method. Capital equals assets minus liabilities. Draw up a statement of affairs at the start of the year to find opening capital, and another at the end to find closing capital.

Then find profit: closing capital, plus drawings, minus any extra capital introduced, minus opening capital. The owner's stake grows through profit and shrinks through drawings, so once you remove drawings and fresh capital from the change, what remains is profit.

For example, opening capital is RM30,000, closing capital is RM42,000, drawings are RM8,000 and new capital is RM5,000. Profit is 42,000 + 8,000 − 5,000 − 30,000 = RM15,000.

When the question asks for missing sales, purchases or cash, build total accounts. For credit sales, prepare a total trade receivables account. Opening receivables plus credit sales, less receipts from customers, less discounts allowed and bad debts written off, equals closing receivables.

Rearrange to solve for credit sales. For credit purchases, prepare a total trade payables account in the same way. For a missing cash or bank figure, or drawings taken in cash, rebuild the cash book with all known receipts and payments.

The balancing figure is the unknown. Label it clearly, such as "credit sales (missing figure)".

Mark-up and margin often help you find the rest of the question. Mark-up is profit as a percentage of cost. Margin is profit as a percentage of selling price.

If the mark-up is 25% on cost and cost of sales is RM40,000, gross profit is RM10,000 and sales are RM50,000. If instead the margin is 20% on sales of RM50,000, gross profit is RM10,000 and cost of sales is RM40,000. Being fluent at moving between sales, cost of sales and gross profit lets you find a missing figure, even closing inventory lost in a fire.

Set out each reconstructed account or statement properly. Head each total account and put opening balances on the correct side.

Show both statements of affairs and the profit calculation as a clear vertical working. Examiners reward the structure even when one figure is wrong, so never collapse several steps into one number.

Marks are mostly lost on direction and on mixing up methods. Treating mark-up as margin, or the reverse, throws off every figure after it, so check whether the percentage is "on cost" or "on sales". In a receivables account, cash received is a credit and sales are a debit.

Goods taken by the owner count as drawings and reduce purchases. Do not forget discounts and bad debts inside the total accounts. Finally, check that each rebuilt account balances once the missing figure is in.

If incomplete records questions feel like a puzzle with no starting point, we can help. One of our teachers can show you how to choose the right tool for each question and work through a few with you. Book a trial class