Business Entities and the Accounting System

This guide covers AS Level subtopics 1.1 Types of business entity and 1.2 The accounting system, from Section 1, Financial accounting, for Cambridge International AS & A Level Accounting 9706, 2026–2028 series.

Where this fits in 9706

These are the first two subtopics of the syllabus: 1.1 establishes who prepares accounts and why their legal structure matters, and 1.2 establishes how transactions are actually recorded — the double-entry system every later subtopic (non-current assets, reconciliation, financial statements) assumes as a starting point. Both are AS Level content, studied by every candidate regardless of whether they continue to the full A Level.

Syllabus coverage

CAMBRIDGE INTERNATIONAL AS & A LEVEL ACCOUNTING 9706 (AS LEVEL)

• Understand the different types of business entity — sole trader, partnership, and limited company (including public limited company) — and the advantages and disadvantages of each (1.1)
• Understand sources of finance and methods of funding for these types of business entity, including loans (secured and unsecured), bank overdrafts, payment by instalments, rental/leasing, and trade credit (1.1)
• Understand the principles of the double entry system and the accounting equation (1.2)
• Understand the role of books of prime entry — sales journal, sales returns journal, purchases journal, purchases returns journal, cash book, general journal (1.2)
• Understand the preparation of ledger accounts and the purpose of a trial balance (1.2)
• Understand the accounting concepts underpinning the preparation of accounts: business entity, historic cost, money measurement, going concern, consistency, prudence, realisation, duality, materiality, objectivity, matching/accruals, and substance over form (1.2)
• Understand the use, and the advantages and disadvantages, of computerised accounting systems, including data security considerations (1.2)

Not tiered, but staged: AS Level candidates study topics 1.1–2.2; A Level candidates study all of 1.1–4.4. Questions on Limited Liability Partnerships will not be set. Knowledge of specific accounting software or applications is not required.

Types of business entity

Three types of business entity are named in this subtopic:

Entity	Ownership	Liability
Sole trader	One owner	Unlimited
Partnership	Two or more owners	Unlimited (in a standard partnership)
Limited company (incl. plc)	Shareholders	Limited to amount invested

Each has advantages and disadvantages from the perspective of owners and other stakeholders: a sole trader is simple and cheap to set up and gives the owner full control, but carries unlimited liability and limited access to capital; a partnership spreads workload, skills and capital across more people, but still generally carries unlimited liability and introduces the risk of disagreement between partners; a limited company offers limited liability and easier access to larger amounts of capital, but involves more regulation, disclosure requirements, and (for a plc) a loss of some control as ownership spreads across shareholders.

Sources of finance

Businesses fund their activities and assets through several routes named in this subtopic: loans (secured against an asset, or unsecured), bank overdrafts (short-term, flexible borrowing against a current account), payment by instalments (spreading the cost of a purchase over time), rental/leasing (using an asset without buying it outright), and trade credit (buying goods now, paying the supplier later). Understanding types of business entity is expected to inform which of these sources of finance is realistic or appropriate for a given business to use.

The double entry system and the accounting equation

Double entry bookkeeping records every transaction twice — once as a debit, once as a credit — so that the accounting records always stay in balance. This rests on the accounting equation:

assets = liabilities + capital

Every transaction affects this equation in a way that keeps both sides equal — the foundational principle the rest of the syllabus’s double-entry work is built on.

Books of prime entry

Rather than recording every transaction directly into the main ledger, transactions are first recorded in a book of prime entry — the initial record, later summarised into the ledger:

• Sales journal — credit sales
• Sales returns journal — goods returned by credit customers
• Purchases journal — credit purchases
• Purchases returns journal — goods returned to credit suppliers
• Cash book — cash and bank transactions
• General journal — transactions not covered by the other books (e.g. correcting errors, recording non-current asset purchases on credit)

From these books of prime entry, transactions are posted into ledger accounts, and a trial balance is then prepared — a list of all ledger balances, used to check that total debits equal total credits before financial statements are prepared.

Fundamental accounting concepts

Several accounting concepts underpin how accounts are prepared, each answering a different question about how a transaction should be treated:

Concept	What it governs
Business entity	The business is accounted for separately from its owner(s)
Historic cost	Assets are recorded at their original purchase cost
Money measurement	Only items that can be expressed in monetary terms are recorded
Going concern	Accounts assume the business will continue operating
Consistency	The same accounting methods are used period to period
Prudence	Revenue and profits are not overstated; losses and liabilities are not understated
Realisation	Revenue is recorded when it is earned, not necessarily when cash is received
Duality	Every transaction has two effects (the basis of double entry)
Materiality	Only items significant enough to affect decisions need precise treatment
Objectivity	Accounts are prepared free from personal bias, based on verifiable evidence
Matching/accruals	Income and expenses are recorded in the period they relate to, not when cash moves
Substance over form	Transactions are recorded according to their real economic substance, not just their legal form

Computerised accounting systems

Computerised systems apply the same double-entry principles but record and process transactions electronically. Advantages typically include speed, reduced arithmetic error and easier report generation; disadvantages include setup and training cost, and reliance on system reliability and data security — the syllabus specifically expects awareness of how the security of data can be ensured within a computerised system (for example, passwords, access levels, and backups), without requiring knowledge of any specific software.

Common mistakes

• Confusing unlimited and limited liability. Sole traders and standard partnerships carry unlimited liability (personal assets are at risk); limited companies limit an owner’s liability to the amount invested.
• Mixing up which book of prime entry a transaction belongs in — credit sales go through the sales journal, not the cash book; only actual cash/bank movements belong in the cash book.
• Confusing the trial balance with a full set of financial statements. A trial balance only checks that debits equal credits — it does not, by itself, prove the accounts are free of all errors (some error types don’t affect the trial balance’s balance at all).
• Mixing up similarly-named concepts — particularly prudence (understating profit optimism) versus consistency (using the same method period to period), which are frequently confused.
• Applying the matching/accruals concept incorrectly by recording income or expenses when cash changes hands rather than when they are actually earned or incurred.

Quick revision checklist

• The three business entity types, their liability, and their advantages/disadvantages
• The five named sources of finance
• assets = liabilities + capital, and what double entry means
• The six books of prime entry and what each records
• The purpose of a trial balance, and its limitations
• All twelve fundamental accounting concepts and what each governs

Related resources

• Cambridge International AS & A Level Accounting subject hub

Written against Cambridge International AS & A Level Accounting 9706, 2026–2028 series. Always check the current syllabus for your examination year.