The accounting system

Accounting AS · Financial accounting. The idea in plain words, the rules to remember, the mistake to avoid and a worked example, written and checked by Mega Lecture.

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The idea

Every transaction has two effects, so it is recorded twice: a debit in one account and an equal credit in another. This is double entry, and it keeps the accounting equation in balance at all times.

A transaction is first listed in a book of prime entry, taken from a source document such as an invoice or credit note. It is then posted to the ledger accounts. At the end of the period the ledger balances are listed in a trial balance to check that total debits equal total credits.

Accounting concepts, such as business entity, prudence and matching, are the agreed rules that decide what is recorded, when, and at what value.

Rules to remember

Common mistake

Entering a machine bought on credit in the purchases journal. That journal is only for goods bought for resale; a non-current asset bought on credit goes in the general journal.

Worked example

A business has assets of $70,000 and liabilities of $22,000. It then buys a machine on credit for $8,000, and the owner takes $1,500 cash for private use. What is the capital now?

  1. Opening capital = $70,000 − $22,000 = $48,000.
  2. Machine on credit: assets +$8,000 and liabilities +$8,000, so capital does not change.
  3. Drawings: assets −$1,500 and capital −$1,500, so capital = $48,000 − $1,500 = $46,500.
  4. Check: assets $76,500 − liabilities $30,000 = $46,500.

Answer: Capital is $46,500.

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