Monash University · S1 2026 · FACULTY OF BUSINESS & ECONOMICS

ACC1001 · Accounting Fundamentals

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Chapter 3 of 11 · ACC1001

Business Transactions & the Accounting Equation

Business Transactions & the Accounting Equation is the recording engine of the unit: cash vs accrual timing, the accrued and prepaid items accrual creates, the line between a transaction, an event and a personal dealing, and the double-entry dual effect that keeps the extended accounting equation balanced. It is examined as transaction analysis: for each dealing, name the elements affected, say whether each rises or falls, and confirm A = L + OE + Income − Expenses still balances.

In this chapter

What this chapter covers

  • 011. Cash vs accrual accounting: the difference is WHEN income/expense is recognised
  • 022. Accrued income/expense (earned/incurred, cash not yet moved) and prepaid items
  • 033. Prepaid expense = asset; prepaid (received-in-advance) income = liability
  • 044. The accounting period concept: splitting the business life into artificial periods
  • 055. Transactions vs events vs personal dealings — what gets recorded
  • 066. Double-entry: every transaction has a dual effect on at least two accounts
  • 077. The accounting equation: A = L + OE, extended to A = L + OE + Income − Expenses
  • 088. Transaction analysis: which elements? increase or decrease? does it still balance?
Worked example · free

Transaction analysis on the accounting equation

Q [8 marks]. For "Mia's Mobile Nails", show the effect of each transaction on Assets / Liabilities / Owner's Equity / Income / Expenses, then confirm the extended equation balances. (1) Mia contributes $8,000 cash to start the business. (2) Buys equipment for $3,000, paying $1,000 cash and the rest on a $2,000 loan. (3) Provides nail services for $600 cash. (4) Pays $150 cash for advertising.
  • +2(1) Owner contributes capital: Assets +8,000 (cash), Owner's equity +8,000 (capital). Two accounts move; equation stays balanced.
  • +2(2) Buy equipment part-cash, part-loan: Assets +3,000 equipment − 1,000 cash = net +2,000; Liabilities +2,000 (loan). The +2,000 net asset equals the +2,000 liability.
  • +2(3) Earn service income for cash: Assets +600 (cash), Income +600 (service income). Income increases equity via the extended equation.
  • +1(4) Pay advertising: Assets −150 (cash), Expenses +150 (advertising). Expenses reduce equity via the extended equation.
  • +1Check the extended equation A = L + OE + Income − Expenses: Assets = 8,000 + 2,000 + 600 − 150 = 10,450; RHS = L 2,000 + OE 8,000 + Income 600 − Expenses 150 = 10,450. Balanced.
Total assets = $10,450 and L + OE + Income − Expenses = $10,450, so the equation balances after all four transactions.
Sia tip — Run the three transaction-analysis questions on every line — which accounts/elements? increase or decrease? does the equation still balance? Income and expenses belong on the equity side of the extended equation (income raises equity, expenses lower it), and the equation must balance after every single transaction, not just at the end.
Glossary

Key terms

Cash vs accrual accounting
Cash basis recognises income when cash is received and expense when cash is paid. Accrual basis (this unit's basis) recognises income when earned and expense when incurred, regardless of when cash moves — which is what creates accrued and prepaid items.
Accrued income / accrued expense
Accrued income is revenue earned but not yet received (recorded as income plus a receivable asset). Accrued expense is a cost incurred but not yet paid (recorded as an expense plus a payable liability).
Prepaid expense vs prepaid income
Prepaid expense is cash paid in advance for a benefit not yet received — an asset that becomes an expense as it is consumed. Prepaid income (income received in advance) is cash received before the service is delivered — a liability that becomes income as it is earned.
Transaction vs event vs personal
A business transaction (business with owner or with an external party) is recorded. A personal transaction (owner only) is not recorded, by the entity concept. A business event may affect the business but cannot be recorded until a transaction occurs — e.g. negotiating a loan that is not yet approved.
Double-entry
Every transaction has a dual effect, changing at least two accounts so the accounting equation always stays in balance. This is why transaction analysis always checks at least two elements.
The accounting equation
Assets = Liabilities + Owner's equity, extended to Assets = Liabilities + Owner's equity + Income − Expenses once performance is included. It must balance after every transaction.
FAQ

Business Transactions & the Accounting Equation FAQ

What is the difference between cash and accrual accounting?

The difference is purely about timing — WHEN income and expense are recognised. Cash accounting records income when cash is received and expense when cash is paid. Accrual accounting, which this unit uses, records income when it is earned and expense when it is incurred, regardless of cash. Accrual gives a truer picture of performance for a period, but it creates accrued and prepaid items where cash and recognition do not coincide.

Is a prepaid expense an asset or an expense?

At the point of payment a prepaid expense is an asset — you have paid cash in advance for a benefit you have not yet received, such as 12 months of insurance. It becomes an expense gradually as the benefit is consumed over the period. The mirror item, income received in advance (prepaid income), is a liability for the receiver until the service is delivered.

What is the difference between a transaction, an event and a personal dealing?

A business transaction involves the business with its owner or an external party and is recorded. A personal transaction involves only the owner and is not recorded, because of the entity concept. A business event may affect the business but cannot yet be recorded — for example negotiating a loan that has not been approved — until an actual transaction takes place.

Why must the accounting equation always balance?

Because of double-entry: every transaction has a dual effect that changes at least two accounts by equal and offsetting amounts on the two sides of the equation. If your analysis leaves the equation unbalanced, you have missed or mis-sized one side of the entry. Checking balance after each transaction is the built-in error check the exam expects you to run.

Study strategy

Exam move

This chapter is the foundation for Topics 4–7, so drill it until transaction analysis is automatic. For every transaction, write the three questions: which elements/accounts are affected, does each rise or fall, and does the equation still balance — and rebalance after each line, not just at the end. Lay analyses out as a five-column table (Assets, Liabilities, Owner's equity, Income, Expenses) so income and expenses sit clearly on the equity side of the extended equation. Memorise the four timing items — accrued income, accrued expense, prepaid expense (asset), prepaid income (liability) — and be ready to say which side records them. Keep the transaction/event/personal distinction sharp, because a personal-dealing distractor is a common trap. Use Monash's tutorial solutions to check your layout matches the marking style.

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