Financial Accounting · Key principles and concepts of accounting

Fundamental Accounting Concepts and Assumptions Explained

Updated 11 October 2026 · Fact-checked

Accounting concepts are the basic ideas that guide how transactions are recorded and reported. Going concern and accruals are underlying assumptions. Business entity, money measurement, historical cost, materiality, prudence and substance over form shape treatment. To answer a question, name the concept, apply it to the facts, then state the effect on the figures.

Understand Fundamental Accounting Concepts and Assumptions

Accounting concepts are the ground rules of financial reporting. They explain why accountants record some things, ignore others, and measure items the way they do. Without them, two businesses could report the same events in very different ways and users could not compare them.

Two ideas are treated as underlying assumptions. Going concern assumes the business will continue operating for the foreseeable future, so assets are not valued as if they were about to be sold off. Accruals says income and expenses are recognised when they are earned or incurred, not when cash moves. A sale made in December but paid in January belongs in December.

Several other concepts shape how items are recorded. Business entity treats the business as separate from its owner, so the owner's personal spending is not a business expense. Money measurement means only items that can be expressed in money are recorded. The skill of your staff is not an asset in the accounts. Historical cost records assets at what was paid for them, which is objective and verifiable but may differ from current value.

The remaining ideas are about judgement. Materiality says an item matters if leaving it out or misstating it could influence users' decisions. A small item can be handled simply. Prudence means caution when making judgements under uncertainty, so assets and income are not overstated and liabilities and expenses are not understated. In the IASB's Conceptual Framework, prudence supports neutrality. It does not allow deliberate understatement. Substance over form means you record the economic reality of a transaction, not just its legal form. For example, a lease that works like a purchase is shown as an asset and liability.

In the exam you will usually be asked to match a scenario to a concept, or to say which treatment follows from it. Learn each concept as one short definition plus one example.

Key formulas to remember

Going concern: Business expected to continue → assets and liabilities measured on a continuing basis; If the business is not a going concern, the basis of preparation must change and this must be disclosed.
Accruals: Profit = income earned in the period − expenses incurred in the period; Timing of cash received or paid is irrelevant to when income and expenses are recognised.
Business entity: Business assets and liabilities ≠ owner's personal assets and liabilities; Owner's private spending is treated as drawings, not an expense.
Money measurement: Record only items that can be measured reliably in money; Staff skills, reputation and morale are not recorded in the ledgers.
Historical cost: Asset recorded at cost at the date of acquisition; Other bases such as revaluation are permitted by some standards.
Prudence: Caution under uncertainty; no deliberate understatement of assets or income, or overstatement of liabilities or expenses; Prudence supports neutrality, which requires an unbiased presentation.
Materiality: Item is material if omitting or misstating it could influence users' decisions; It depends on size and nature, and is a judgement not a fixed percentage.
Substance over form: Account for economic reality, not only legal form; Examples: sale and repurchase arrangements, leases.

How to solve Fundamental Accounting Concepts and Assumptions questions

Use this method for any question that asks you to identify or apply a concept or assumption.

1Read the scenario and underline the key facts: timing, ownership, legal wording, size, uncertainty.
2Decide what the question asks: name the concept, explain it, or give the accounting treatment.
3Match the facts to a trigger: future of the business (going concern), timing (accruals), owner's private items (business entity), non-monetary items (money measurement), cost versus value (historical cost), size (materiality), caution (prudence), legal form versus reality (substance).
4Eliminate options that describe a different concept with similar wording.
5State the treatment that follows and its effect on profit or assets.
6For number entry, calculate carefully and check the period and sign.
7Reread the question to confirm you answered what was asked.

Quickest way: Trigger-word matching

When to use it: Use for multiple choice questions that ask which concept applies to a short scenario.

Look for the trigger: owner's personal items means business entity.
Look for timing of income or expense versus cash, which means accruals.
Look for the ability to continue trading, which means going concern.
Look for a small amount ignored, which means materiality.
Look for legal ownership differing from who controls the benefits, which means substance over form.
If two options seem right, pick the one that fits the facts most directly.

Common mistakes in Fundamental Accounting Concepts and Assumptions

Confusing going concern with accruals
Both are called underlying assumptions and both involve time.
Fix: Going concern is about the business continuing. Accruals is about matching income and expenses to the period they relate to.
Thinking prudence means always choosing the lowest profit
Older textbooks described prudence as understating gains.
Fix: Prudence is caution under uncertainty. It does not permit deliberate understatement, because that would breach neutrality.
Treating the owner's personal expenses as business expenses
The money was paid from the business bank account.
Fix: Apply business entity. Record the payment as drawings, which reduces equity and is not an expense.
Treating historical cost as meaning assets never change in value
Students overlook that other measurement bases exist.
Fix: Say that historical cost is the basic starting point, but some standards allow revaluation or fair value.
Applying materiality as a fixed percentage
Rules of thumb are remembered as rules.
Fix: State that materiality depends on size and nature, and on whether users' decisions could be affected.
Using legal form to decide treatment under substance over form
The legal document is the most visible fact.
Fix: Ask who controls the asset and bears its risks and benefits. Record that reality.

Worked examples

Example 1

A sole trader pays $1,200 from the business bank account for a family holiday. Which concept determines the treatment, and how is it recorded?

Show the solution

The payment is personal and not for business purposes.
The business is treated as separate from the owner, which is the business entity concept.
The payment is a withdrawal of funds by the owner.
Record it as drawings: debit drawings $1,200, credit bank $1,200.
It is not an expense, so profit is unchanged.

Answer: Business entity concept; record $1,200 as drawings, with no effect on profit.

Example 2

A company's year ends on 31 December. It receives an electricity bill for $900 in January covering October to December. No entry has been made. What is the effect on the year's profit, and which concept applies?

Show the solution

The electricity was used during the year, so the cost was incurred in the year.
The accruals concept says expenses are recognised when incurred, not when paid.
Record an accrual: debit electricity expense $900, credit accruals $900.
Expenses rise by $900, so profit falls by $900.
Accruals appear as a current liability at 31 December.

Answer: Accruals concept; profit decreases by $900 and a $900 liability is recorded.

Exam tips

Learn one-line definitions and one example for each concept. Most questions are matching tasks.
In multiple response questions, count how many options you must select and check each against the definition.
Watch for similar terms: prudence versus neutrality, and going concern versus accruals.
For substance over form, ask who benefits from and controls the asset before you pick an answer.
In Section B, name the concept first, then give the entry or effect on profit.

Practice questions from Key principles and concepts of accounting

Fundamental Accounting Concepts and Assumptions in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Fundamental Accounting Concepts and Assumptions: frequently asked questions

What is the difference between going concern and accruals?

Going concern assumes the business will keep operating for the foreseeable future. Accruals requires income and expenses to be recognised in the period they arise, whatever the cash timing. Both are underlying assumptions but they answer different questions.

What is substance over form with an example?

It means recording the economic reality of a transaction instead of just its legal form. If a business sells an asset but agrees to buy it back at a fixed price, it still controls the asset's benefits and risks. The arrangement may be treated as a loan, not a sale.

What is the difference between prudence and neutrality?

Neutrality means information is presented without bias. Prudence is caution when making judgements under uncertainty. Prudence supports neutrality, but it does not allow deliberate understatement of assets or income.

What is the business entity concept in simple terms?

The business is treated as separate from its owner. The owner's personal assets and spending are kept out of the business accounts. Money the owner takes out is recorded as drawings.