Theory Base of Accounting
Every number on a balance sheet rests on a set of agreed rules — accounting concepts and conventions — and this chapter teaches you exactly what those rules are, why they exist, and how they keep financial statements honest.
Board exam questions regularly ask you to identify which accounting concept or convention applies to a given situation, and understanding the Theory Base also sets the foundation for every advanced topic in accountancy — from journal entries to final accounts — in Plus One, Plus Two, and beyond into CA or B.Com.
Concept
Lots of students think…
"The Accrual Concept means revenue is recorded when the cash is actually received."
Actually…
Revenue is recorded when goods are delivered or services are performed, regardless of when payment arrives. Cash received later is simply the settlement of a debt the customer already owed — the earning already happened.
Every balance sheet follows a shared set of rules — accounting concepts and conventions — so that financial statements are honest and comparable. By the end of this chapter you will know exactly what those rules are and why each one exists.
Business Entity Concept
The business and its owner are treated as two completely separate persons in the eyes of accounting. Whatever the owner puts into the business is recorded as the business's capital — money it owes back to the owner — not as the owner's personal money sitting around.
Rajan runs a kirana shop in Thrissur and deposits ₹3 lakh of his personal savings into the shop's bank account to start it. In the accounts, that ₹3 lakh is the shop's capital — a liability the shop owes Rajan. Rajan's home loan and personal expenses never enter the shop's books at all.
Going Concern Concept
Accounting assumes the business will keep running for the foreseeable future — it is not about to shut down tomorrow. Because of this assumption, assets are valued at what they cost, not at the fire-sale price you would get if you had to close suddenly.
Rajan bought refrigerators for his shop for ₹80,000. If the shop were closing tomorrow, he might only get ₹20,000 for them second-hand. But because the shop is a going concern, the books show them at ₹80,000 (less depreciation), reflecting normal business use — not a distress sale price.
Money Measurement Concept
Accounting only records things that can be measured in money (rupees). If something real and valuable cannot be given a rupee figure, it stays out of the books entirely. This keeps accounts objective and verifiable.
Priya's garment shop in Kozhikode has an excellent reputation on the street and a very loyal group of regular customers. Both are real business advantages, but neither has a clear rupee value everyone would agree on — so neither appears in her accounts. Only the ₹60,000 uniform sale she can invoice goes in.
Cost Concept and Accounting Period
The Cost Concept says every asset is recorded at the original price paid for it, not at today's market value. The Accounting Period Concept divides the continuous life of a business into fixed time slices — usually one financial year (1 April to 31 March in India) — so profit and loss can be calculated regularly.
Priya's mother bought the shop premises in Kozhikode for ₹4 lakh in 2010. It is worth ₹18 lakh today, but the books still show ₹4 lakh — that is the Cost Concept at work. At the end of every 31 March, the family closes the accounts and calculates the year's profit, even though the business itself never actually 'pauses' — that is the Accounting Period Concept.
Dual Aspect and Accrual + Matching
Every transaction has two sides — every debit has an equal credit — so the basic equation Assets = Liabilities + Capital always balances. The Accrual Concept says record revenue when it is earned and expenses when they are incurred, not when cash moves. The Matching Concept pairs each expense with the revenue it helped earn, giving you the true profit for that period.
Priya delivers 200 school uniforms on 28 October but the school pays in November. She records the ₹60,000 sale in October (Accrual), and also records the ₹22,000 fabric cost and ₹8,000 tailor's wages in October (Matching). October profit = ₹30,000. When cash arrives in November, she just clears the debtor — no new sale is recorded. And both sides of every entry balance: stock falls, debtor rises (Dual Aspect).
Conventions: Conservatism, Consistency, Full Disclosure
Conventions are practical agreements on how to apply the concepts. Conservatism says: record a probable loss now, but record a gain only when it is certain. Consistency says: once you pick an accounting method, stick with it year after year so results can be compared. Full Disclosure says: tell readers everything important — including problems and policy changes — in the financial statements or their notes.
A customer owes Priya's shop ₹30,000 and has stopped responding for months. Conservatism tells her to create a provision for bad debt immediately — not wait to see if he pays. But when her lawyer says she might win a ₹1 lakh court case, she does not book that income yet — it is not certain. She uses the straight-line depreciation method every year without switching (Consistency), and when she changes her stock valuation method she mentions it clearly in a note (Full Disclosure).
Notes
Two textile shops in Thrissur can both be profitable, yet their accounts are useless for comparison if each owner follows his own private logic. The theory base fixes that. Accounting CONCEPTS say what a business is and what may be measured; accounting CONVENTIONS say how to apply those concepts consistently. In India these are formalised as Accounting Standards issued by the ICAI and backed by the Companies Act, 2013.
Key terms & definitions
- GAAP
- Generally Accepted Accounting Principles — the body of concepts, conventions and standards that accountants agree to follow so statements are consistent and comparable.
- Business Entity Concept
- The business is treated as separate from its owner. Money the owner puts in is capital — a liability of the business towards him.
- Money Measurement Concept
- Only events measurable in money are recorded. Staff loyalty and a shop's street reputation are real advantages but stay out of the books.
- Going Concern Concept
- Accounts are prepared assuming the business will continue for the foreseeable future and is not about to be shut down or sold off.
- Accounting Period Concept
- The indefinite life of a business is cut into fixed periods (usually 1 April to 31 March in India) so results can be reported regularly.
- Cost Concept
- An asset is recorded at the price actually paid to acquire it, not at market value. Also called the historical cost concept.
- Dual Aspect Concept
- Every transaction has two effects of equal amount — one debit and one credit — keeping Assets = Liabilities + Capital always true.
- Revenue Recognition (Realisation)
- Revenue is recognised when goods are delivered or services are rendered, not when the order is received or the cash arrives.
- Matching Concept
- Expenses of a period must be set against the revenues of that same period, so the profit figure is true for that period.
- Accrual Concept
- Income and expenses are recorded when they are earned or incurred, regardless of when cash is received or paid.
- Conservatism (Prudence)
- Provide for all probable losses, but do not record a gain until it is certain. Anticipate no profit; provide for all possible losses.
- Materiality
- Items significant enough to influence a user's decision must be shown separately; trivial items may be merged or treated simply.
Why a theory base is needed at all
- Without shared rules, two equally honest shopkeepers would produce accounts that cannot be compared.
- The theory base makes statements COMPARABLE across firms and RELIABLE across years.
- It also limits manipulation — an owner cannot simply choose whichever treatment flatters his profit.
- Two families of rules: CONCEPTS (what a business is, what is measured) and CONVENTIONS (how to apply them in practice).
Business Entity Concept
- Owner and business are two different persons in the eyes of accounting.
- When Rajan invests ₹5,00,000 of personal savings into his kirana shop, the shop records CAPITAL of ₹5,00,000 — an amount it owes back to Rajan.
- This is exactly why capital appears on the liabilities side, and why drawings reduce capital instead of being an expense.
- Without this concept, personal and business transactions would mix and profit would be meaningless.
Money Measurement Concept
- Only what can be expressed in rupees is recorded.
- Rajan's honest staff, his customer goodwill on the street and his own management skill are genuine strengths — none of them appear in the books.
- Limitation: money's value itself changes with inflation, so amounts of different years are not strictly comparable.
- This is a leading reason accounting cannot show the full picture of a business.
Going Concern Concept
- Accounts assume the business will continue operating for the foreseeable future.
- This is why a machine costing ₹1,00,000 is spread over its useful life as depreciation instead of being written off at once.
- It also justifies showing assets at cost less depreciation rather than at forced-sale value.
- It is an ASSUMPTION, not a guarantee — it simply means there is no evidence the business is about to close.
Accounting Period Concept
- A business may run for decades, but users cannot wait decades for results.
- Life is divided into equal periods — in India normally the financial year, 1 April to 31 March.
- At the end of each period, a Profit & Loss Account (for the period) and a Balance Sheet (on the closing date) are prepared.
- This concept creates the need for adjustments — outstanding, prepaid, accrued items — so each period carries only its own income and expense.
Cost Concept (Historical Cost)
- An asset enters the books at the amount actually paid for it.
- Land bought in 1995 for ₹2,00,000 stays at ₹2,00,000 even if it is worth ₹50,00,000 today.
- Advantage: the figure is objective and can be verified from the purchase document.
- Limitation: the balance sheet may badly understate the true present worth of the business.
Dual Aspect Concept — the heart of accounting
- Every transaction affects at least two accounts, by equal amounts, on opposite sides.
- If Rajan buys goods worth ₹50,000 on credit: stock (asset) rises ₹50,000 AND creditors (liability) rise ₹50,000.
- This is the source of the accounting equation Assets = Liabilities + Capital, and of double-entry bookkeeping itself.
- Because of it, a trial balance can be used to check arithmetical accuracy.
Revenue Recognition, Matching and Accrual
- REVENUE RECOGNITION: revenue is earned when goods are DELIVERED or the service is RENDERED — not when the order is placed and not when cash arrives.
- Worked case: a paint maker gets an order on 15 June, delivers on 20 June, receives a cheque on 25 June which clears on 27 June. Revenue of ₹50,000 is recognised on 20 JUNE, the date of delivery.
- MATCHING: once revenue is fixed to a period, all expenses incurred to earn it belong to that same period — including unpaid (outstanding) expenses.
- ACCRUAL: record income when earned and expenses when incurred, regardless of cash movement. This is why outstanding and prepaid adjustments exist.
- Accrual is the opposite of cash-basis accounting, where nothing is recorded until money moves.
Conventions: Consistency and Full Disclosure
- CONSISTENCY: once a method is chosen — say straight-line depreciation — it is followed year after year.
- A firm changing methods every year could show whatever profit it liked, so comparison across years would be worthless.
- A change IS allowed when it gives a better presentation, but it must be disclosed along with its effect.
- FULL DISCLOSURE: every material fact that affects a user's judgement must be shown — in the statements themselves or in notes.
- Example: a pending court case that may cost the business money must be disclosed even though the amount is not yet certain.
Conventions: Materiality and Conservatism
- MATERIALITY: an item matters if knowing it would change a user's decision. A ₹50 stapler is written off as expense rather than treated as an asset and depreciated.
- What is material depends on size — ₹10,000 is trivial for a large company but significant for a small shop.
- CONSERVATISM (PRUDENCE): anticipate no profit, but provide for all possible losses.
- If a debtor owing ₹30,000 looks unlikely to pay, create a provision for doubtful debts NOW; but do not record a rise in the value of land until it is actually sold.
- This is why closing stock is valued at cost OR net realisable value, WHICHEVER IS LOWER.
Accounting Standards in India
- Accounting Standards (AS) are issued by the INSTITUTE OF CHARTERED ACCOUNTANTS OF INDIA (ICAI).
- They convert broad concepts into specific, enforceable rules for particular items such as depreciation, inventory and revenue.
- The Companies Act, 2013 gives them legal force for companies.
- Ind AS are India's standards converged with IFRS, applied to larger companies.
- In any annual report, the section headed 'Significant Accounting Policies' is where the firm states which methods it chose.
Three traps students fall into
- Accrual does NOT mean 'record only when cash is received' — that is the cash basis, and it is the opposite.
- Conservatism does NOT permit deliberately understating profit to save tax. It means not overstating profit when the outcome is uncertain.
- Going concern does NOT guarantee the business will never close. It is only a default assumption in the absence of evidence to the contrary.
Formulas & formats
- Dual Aspect Concept expressed as the accounting equation: Assets = Liabilities + Capital
- Conservatism applied to stock valuation: Closing Stock = Cost OR Net Realisable Value, whichever is LOWER
- Accrual adjustments: Income earned = Income received + Income accrued (not yet received) − Income received in advance Expense for year = Expense paid + Outstanding expense − Prepaid expense
- Matching Concept: Profit of a period = Revenue EARNED in the period − Expenses INCURRED to earn it
- Indian accounting year (Accounting Period Concept): 1 April → 31 March
Important questions & model answers
What is meant by the Business Entity Concept? Give one implication.
3 marks- The Business Entity Concept treats the business as an entity separate and distinct from its owner.
- Transactions are recorded from the point of view of the business, not the proprietor.
- Implication: money brought in by the owner is shown as CAPITAL, a liability of the business towards him, and money taken out is DRAWINGS which reduces capital — not a business expense.
Explain the Money Measurement Concept and state one limitation arising from it.
3 marks- The Money Measurement Concept states that only those transactions and events which can be expressed in terms of money are recorded in the books.
- Consequently, valuable but non-monetary facts — the skill of employees, the efficiency of management, customer goodwill — find no place in the accounts.
- Limitation: the financial statements therefore give an incomplete picture of the business; and because the value of money itself changes with inflation, figures of different years are not strictly comparable.
Distinguish between the Cash Basis and the Accrual Basis of accounting.
4 marks- RECOGNITION: Under the cash basis, income and expense are recorded only when cash is actually received or paid. Under the accrual basis, they are recorded when earned or incurred.
- OUTSTANDING / PREPAID: The cash basis ignores outstanding and prepaid items; the accrual basis adjusts for both.
- PROFIT: The cash basis may show a misleading profit for the period; the accrual basis gives a truer profit because of the matching concept.
- ACCEPTANCE: The accrual basis is required under the Companies Act, 2013; the cash basis is used only by some small concerns and professionals.
Indian Paints receives an order on 15 June to supply paint worth ₹50,000. Goods are delivered on 20 June. The customer's cheque is issued on 25 June and clears on 27 June. On which date should revenue be recognised, and why?
4 marks- Revenue should be recognised on 20 JUNE — the date the goods were delivered.
- Under the Revenue Recognition (Realisation) Concept, revenue is earned when the goods are transferred to the buyer and the risks and rewards of ownership pass to him.
- The order date (15 June) is only a promise — no goods have moved, so nothing is earned.
- The cheque dates (25 and 27 June) concern collection of cash, not the earning of revenue; under the accrual concept cash movement does not decide recognition.
- Therefore ₹50,000 is credited to Sales in JUNE, and the amount is shown as a debtor until the cheque clears.
State the Conservatism (Prudence) convention. Give two examples of its application.
4 marks- Conservatism requires that all probable losses be provided for, while gains are recognised only when they are actually realised — 'anticipate no profit, provide for all possible losses'.
- Example 1: Closing stock is valued at cost or net realisable value, WHICHEVER IS LOWER, so an expected fall in value is recognised at once.
- Example 2: A provision for doubtful debts is created against debtors who may not pay, even though the loss has not yet occurred.
- Purpose: to ensure profit and assets are not overstated, so users are not misled into over-optimism.
- It does NOT permit deliberate understatement of profit — creating secret reserves is a misuse of the convention.
Why is the Consistency convention important? Is a change of method ever permitted?
3 marks- Consistency requires that the same accounting methods be followed from one period to the next.
- It makes the results of different years COMPARABLE, so a genuine improvement or decline can be identified rather than being produced by a change of method.
- Without it, a firm could switch depreciation methods each year to report whatever profit suited it.
- A change IS permitted when the new method gives a better and truer presentation — but the change and its monetary effect must be fully disclosed.
Explain the Going Concern Concept and state one effect it has on the treatment of fixed assets.
3 marks- The Going Concern Concept assumes the business will continue its operations for the foreseeable future and has no intention or necessity of closing down.
- Effect: a fixed asset is not shown at the price it would fetch if sold today. Its cost is spread over its useful life through depreciation.
- So a machine costing ₹1,00,000 with a ten-year life is charged at ₹10,000 a year rather than written off immediately.
- It also justifies classifying assets and liabilities as current and non-current.
What is the Matching Concept? Show how it applies to an outstanding expense.
3 marks- The Matching Concept requires that the expenses of a period be matched against the revenues of that same period to arrive at correct profit.
- An outstanding expense is one that relates to the current year but has not yet been paid — for example, December's rent paid in April.
- Because the benefit was consumed this year, the expense must be charged to this year's Profit & Loss Account and simultaneously shown as a current liability in the Balance Sheet.
- Ignoring it would overstate this year's profit and understate liabilities.
Define Materiality with an example.
2 marks- Materiality means that an item should be disclosed separately if knowledge of it could influence the decision of a user of the accounts.
- Items too small to affect judgement may be treated in a simplified way.
- Example: a stapler costing ₹50 is charged fully as an expense rather than capitalised as an asset and depreciated over its life.
- Materiality is relative — ₹10,000 may be immaterial for a large company but highly material for a small shop.
Who issues Accounting Standards in India, and what purpose do they serve?
3 marks- Accounting Standards in India are issued by the Institute of Chartered Accountants of India (ICAI).
- They translate broad accounting concepts and conventions into definite rules for specific items such as depreciation, inventory valuation and revenue recognition.
- Purpose: to reduce the number of permitted alternatives, improve comparability between firms, and ensure a true and fair view.
- They are given legal backing for companies by the Companies Act, 2013. Ind AS are the Indian standards converged with IFRS, applicable to larger companies.
Exam tips
- Learn which items are CONCEPTS and which are CONVENTIONS — a question may ask for one group specifically, and listing from the wrong group earns nothing.
- For every concept, memorise one crisp example. Examiners award the example mark separately from the definition mark.
- Revenue-recognition questions almost always give you an order date, a delivery date and a payment date. The answer is the DELIVERY date — say so explicitly and give the reason.
- When explaining conservatism, quote the phrase 'anticipate no profit, provide for all possible losses' — it is the expected wording.
- In 'distinguish between cash basis and accrual basis', answer with a named basis for each difference (recognition, outstanding/prepaid, profit, legal acceptance).
- Do not confuse the Cost Concept with the Matching Concept — cost is about the VALUE at which an asset is recorded; matching is about the PERIOD to which an expense belongs.
- Write 'Institute of Chartered Accountants of India (ICAI)' in full at least once; the abbreviation alone may not secure the mark.
Quick revision
- CONCEPTS: Business Entity · Money Measurement · Going Concern · Accounting Period · Cost · Dual Aspect · Revenue Recognition · Matching · Accrual · Objectivity.
- CONVENTIONS: Consistency · Full Disclosure · Materiality · Conservatism.
- Business entity → capital is a liability, drawings reduce capital.
- Dual aspect → Assets = Liabilities + Capital → double entry → trial balance.
- Revenue is earned on DELIVERY, not on order and not on cash receipt.
- Accrual: record when earned/incurred, not when cash moves — this creates outstanding and prepaid adjustments.
- Conservatism → closing stock at cost or NRV, whichever is LOWER; provision for doubtful debts.
- Consistency allows a change of method only if it is better AND disclosed.
- Accounting Standards are issued by ICAI and backed by the Companies Act, 2013.
The full picture
Imagine two shopkeepers in Thrissur, both running textile shops, both profitable. If each one records transactions using his own personal logic, their balance sheets become impossible to compare. Accounting solves this by building on a shared Theory Base — a set of concepts and conventions that every accountant follows. These are not arbitrary rules invented in a classroom; they reflect the economic reality of how businesses actually work.
The first group of ideas is called accounting concepts — they describe what a business is and what accounting measures. The Business Entity Concept draws a clear line between the owner and the business: when Rajan invests ₹5 lakh of personal savings into his kirana shop, the shop records that as its own capital, not as Rajan's money sitting in a drawer. The Going Concern Concept assumes the business will keep running indefinitely, so assets like refrigerators and shelves are valued at their purchase cost, not at the distress price you would get if you had to sell everything tomorrow.
Three more concepts shape what gets recorded and when. The Money Measurement Concept says accounting only captures events that can be expressed in rupees — so Rajan's loyal staff and his shop's reputation on the street are real advantages but do not appear in the books. The Cost Concept values every asset at the price actually paid, not at today's market value; a shop space bought for ₹8 lakh in 2015 stays at ₹8 lakh in the books even if it is worth ₹25 lakh today. The Accounting Period Concept divides continuous business life into fixed time intervals — usually a financial year (1 April to 31 March in India) — so profit and loss can be calculated periodically, not just when the owner decides to check.
The Dual Aspect Concept is accounting's most important identity: Assets = Liabilities + Capital. Every single transaction touches at least two accounts — a debit and a credit — and the equation always stays balanced. If Rajan buys goods for ₹50,000 on credit, stock (asset) rises and creditors (liability) rise by the same amount. The Accrual Concept says revenue belongs to the period when it is earned, and expenses belong to the period when they are incurred — regardless of when cash moves. A sale made on 28 March is March revenue even if the customer pays in April. The Matching Concept pairs costs with the revenues they helped generate: if you pay a delivery boy's salary in March for March deliveries, that salary expense matches March sales, giving you the true March profit.
The second group, accounting conventions, are practical agreements on how to apply those concepts consistently. Consistency requires that once you choose a method — say, the straight-line method for depreciation — you stick with it year after year. Switching methods every year would let a business paint any profit picture it liked. Full Disclosure requires that all material facts, including pending court cases or a change in accounting policy, be clearly stated in the financial statements or their notes. Materiality recognises that strict rules can be relaxed for genuinely trivial amounts: a ₹200 stapler can be expensed immediately rather than capitalised as a fixed asset.
Conservatism (also called Prudence) is the convention that tells you to expect the worst and hope for the best — in accounting terms, recognise a probable loss now, but recognise a gain only when it is certain. So if a debtor owes your business ₹30,000 and looks unlikely to pay, you create a provision for bad debts immediately. But if you are expecting to win a ₹1 lakh court case, you do not record that income until the court actually awards it. This asymmetry protects creditors and investors from over-optimistic books.
In India, these concepts and conventions are formalised through Accounting Standards (AS) issued by the Institute of Chartered Accountants of India (ICAI) and reinforced by the Companies Act 2013. When you read a company's annual report, the section labelled 'Significant Accounting Policies' is where the company declares which concepts and conventions it has applied — exactly what this chapter teaches you to understand and evaluate.
An Indian example
Priya and her mother run a small readymade garments shop in Kozhikode called 'Lakshmie Threads'. In October, a school places an order for 200 uniforms worth ₹60,000. Priya stitches and delivers the uniforms on 28 October, but the school pays only in November after checking the stock. Priya records ₹60,000 as October sales — not November — because the Accrual Concept says revenue is earned when goods are delivered. The fabric cost ₹22,000 and she paid the tailor ₹8,000 in October itself, so the Matching Concept tells her to record all ₹30,000 of costs in October too, giving a clear October profit of ₹30,000. When November's bank statement shows the school's payment arriving, no new sale is recorded — only the debtor account is cleared. Meanwhile, Priya's brother suggests writing the shop's land (bought in 2010 for ₹4 lakh) at its current value of ₹18 lakh to make the business look stronger to a bank lender. Priya refuses — the Cost Concept requires she keep it at ₹4 lakh, and full market revaluation would need proper disclosure under accounting standards.
Common misconceptions to watch for
- Accrual Concept means revenue is recorded only when cash is received — wrong. Revenue is recorded when goods are delivered or services are rendered, and the matching expense is recorded in the same period. Cash arriving later is just the settlement of a debt the customer already owed.
- Conservatism means the business is allowed to deliberately understate profit to reduce its tax bill — wrong. Conservatism is about prudence: probable losses are provided for immediately, but unearned or uncertain gains are not recognised yet. It is a safeguard for creditors and investors, not a tool for tax manipulation.
- Going Concern Concept guarantees that a business will never shut down — wrong. It is simply a default assumption: in the absence of evidence to the contrary, the accountant assumes the business will continue long enough to fulfil its plans and obligations. If that assumption becomes doubtful — due to heavy losses, legal action, or insolvency — it must be disclosed clearly in the financial statements.
Video
Stop Memorizing Rules: Golden Rules of Accounting Fast
Questions
Indian Paints Ltd., a paint manufacturer in Gujarat, receives an order on 15 June to supply ₹50,000 of paint to a contractor. The paints are delivered on 20 June. The contractor issues a cheque on 25 June, which clears Indian Paints' bank account on 27 June. Under the Accrual Concept, in which month should Indian Paints recognise the ₹50,000 as revenue?
- 1Identify the transaction trigger under Accrual Concept.Accrual Concept requires revenue to be recognised when goods or services are transferred to the customer, not when payment is received. The key moment is when control of the goods passes to the buyer.
Question 1 of 5 · easy
A coaching institute in Kerala collects ₹1,00,000 in fees on 30 June for tuition classes that will run from July to September. Under Accrual Concept, when should the coaching institute recognise this ₹1,00,000 as revenue?
Quiz
Test yourself — pick an answer, then hit "Check" to see the explanation and your running score.
Question 1 of 5 · easy
A coaching institute in Kerala collects ₹1,00,000 in fees on 30 June for tuition classes that will run from July to September. Under Accrual Concept, when should the coaching institute recognise this ₹1,00,000 as revenue?
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