Chapter Overview
Theory Base of Accounting is the second chapter of CBSE Class 11 Accountancy. It explains the theoretical foundation on which the entire accounting system is built. Just as a building needs a strong foundation, accounting practices need a set of principles, concepts, and conventions that ensure uniformity, reliability, and comparability of financial statements. This chapter covers the Generally Accepted Accounting Principles (GAAP), accounting standards, IFRS, and the accounting equation. Understanding these concepts is essential because every journal entry, every financial statement, and every audit report is based on these principles.
Basic Accounting Concepts
Accounting concepts are the fundamental assumptions that underlie the accounting process. They provide the logical framework within which accounting operates. There are six basic accounting concepts as per NCERT:
1. Business Entity Concept
The business is treated as a separate entity distinct from its owner. The accounts of the business are maintained from the business's point of view, not the owner's. This means:
- The owner's personal transactions are not recorded in the business books.
- Capital contributed by the owner is a liability of the business to the owner.
- Drawings (owner's withdrawals) reduce the business's capital.
- The business owes the owner the amount of capital invested.
Example: If Mr Ram starts a business by investing Rs 1,00,000, the business records Rs 1,00,000 as capital (liability to Ram) and Rs 1,00,000 as cash (asset). If Ram pays Rs 5,000 from business cash for his daughter's school fees, this is a drawing — it reduces capital, not a business expense.
Why it matters: Without this concept, business performance and personal finances would be mixed, making it impossible to measure business profit or financial position accurately.
2. Money Measurement Concept
Only those transactions and events that can be expressed in monetary terms are recorded in the books of accounts. Qualitative aspects — management quality, employee morale, brand loyalty — are not recorded because they cannot be measured in money.
Example: A firm has 50 skilled workers. Their skill cannot be recorded, but their salary of Rs 15,00,000 per month can be. Similarly, a dispute with a supplier is not recorded, but the legal fees paid are.
Why it matters: It provides a common unit of measurement (rupees) that makes it possible to add, subtract, and compare different items. Without a common unit, you cannot add furniture (pieces), land (acres), and cash (rupees).
Limitation: Important non-financial information is excluded from the financial statements.
3. Going Concern Concept
It is assumed that the business will continue to operate for the foreseeable future. There is no intention or need to close down or significantly reduce the scale of operations.
Implications:
- Fixed assets are recorded at cost less depreciation (not at market value or liquidation value).
- Liabilities are classified as current and non-current based on normal repayment schedules.
- Prepaid expenses are carried forward as assets because they will be consumed in future periods.
Example: A company buys machinery for Rs 5,00,000 with a useful life of 10 years. It depreciates Rs 50,000 per year. If the company were closing down next month, the machinery would be recorded at its resale value, not at cost minus depreciation.
Why it matters: If a business is not a going concern, financial statements must be prepared on a liquidation basis — assets at realisable value, liabilities at settlement value.
4. Accounting Period Concept
The entire life of a business is divided into artificial time periods for the purpose of measuring performance. These periods are called accounting periods. Usually, an accounting period is one year (April 1 to March 31 in India).
Implications:
- Profit or loss is ascertained for each accounting period separately.
- Accrual concept and matching concept are applied within each period.
- Comparison of performance across periods becomes possible.
Example: A company started in 2015 will prepare financial statements for each year — 2015-16, 2016-17, and so on — even though the business may run for decades.
Why it matters: Without periodic measurement, stakeholders would have to wait until the business closes to know whether it made a profit — which could be decades.
5. Cost Concept
Assets are recorded in the books at their original purchase price (historical cost), not at their current market value. This cost is the basis for all subsequent accounting entries relating to that asset.
Implications:
- Land bought for Rs 2,00,000 continues to be shown at Rs 2,00,000 even if its market value rises to Rs 20,00,000.
- Depreciation is calculated on historical cost, not market value.
- The cost concept brings objectivity because the purchase price is verifiable from documents.
Example: A firm purchases a building for Rs 10,00,000. After five years, its market value may be Rs 15,00,000, but in the Balance Sheet, it is shown at Rs 10,00,000 minus depreciation.
Why it matters: If market values were used, financial statements would become subjective and unreliable because different people may estimate different market values.
Limitation: The Balance Sheet does not reflect the current worth of the business because assets are stated at historical cost.
6. Dual Aspect Concept (Dual Side Concept)
Every transaction has two aspects — a debit and a credit. This is the basis of the double-entry system of bookkeeping. If one account is debited, another account must be credited by an equal amount.
This concept gives rise to the Accounting Equation:
Assets = Liabilities + Capital
This equation must always balance. We will explore this in detail later in this chapter.
Example: When a business buys furniture for Rs 10,000 in cash, furniture (asset) increases by Rs 10,000 and cash (asset) decreases by Rs 10,000. The equation still balances.
Why it matters: The dual aspect concept is the foundation of the entire double-entry bookkeeping system. Without it, there would be no systematic way to record transactions.
Accounting Conventions
Accounting conventions are customs or traditions that guide accountants in preparing financial statements. They have developed over time through common practice. There are four important conventions:
1. Convention of Conservatism (Prudence)
"Anticipate no profit, but provide for all possible losses." This convention requires accountants to be cautious — they should not record unrealised gains but should provide for all expected losses.
Applications:
- Creating a provision for doubtful debts even when no debt has actually become bad.
- Valuing closing stock at cost or market price, whichever is lower.
- Not recording anticipated gains until they are realised.
Example: If a debtor owes Rs 10,000 and there is doubt about recovery, a provision for doubtful debts is created. But if the debtor is expected to pay Rs 10,500, the extra Rs 500 is not recorded until actually received.
2. Convention of Consistency
Accounting methods and practices should remain consistent from one accounting period to the next. Frequent changes make comparison across periods meaningless.
Applications:
- If a firm uses the straight-line method of depreciation, it should continue using it year after year (unless there is a valid reason to change, which must be disclosed).
- If inventory is valued at FIFO, the same method should be followed consistently.
Example: A company using the written-down value method of depreciation cannot switch to the straight-line method in the middle of the year without valid reason and proper disclosure.
Exception: Consistency does not mean rigidity. If a change is necessary (e.g., change in law, better method available), it can be made — but it must be disclosed in the notes to financial statements.
3. Convention of Materiality
Only items that are material (significant enough to influence decisions) need to be disclosed separately. Immaterial items can be merged with other items.
Applications:
- A pencil sharpener costing Rs 50 may be treated as an expense even though it is an asset (immaterial amount).
- A Rs 5,00,000 loss must be disclosed separately (material).
- Small items like postage, stationery can be grouped under "General Expenses."
What is material? It depends on the size and nature of the business. Rs 1,000 may be material for a small shop but immaterial for a large company.
4. Convention of Full Disclosure
Financial statements should disclose all significant information that is necessary for the users. Nothing material should be hidden.
Applications:
- Contingent liabilities are disclosed as a footnote even though they are not recorded in the books.
- Accounting policies are disclosed in the notes to accounts.
- Changes in accounting policies are disclosed.
Example: If a company is facing a lawsuit for Rs 50,00,000, this must be disclosed in the notes to financial statements even though the outcome is uncertain.
Accounting Standards
Need for Accounting Standards
Without accounting standards, different firms would follow different accounting policies, making comparison impossible. A company using FIFO for stock valuation and another using weighted average would show different profits even with identical transactions. Accounting standards ensure:
- Uniformity in preparation and presentation of financial statements.
- Comparability across firms and across periods.
- Reliability and transparency of financial information.
- Compliance with legal requirements.
Accounting Standards Board (ASB)
The Accounting Standards Board (ASB) was set up by the Institute of Chartered Accountants of India (ICAI) in 1977. It formulates accounting standards for India. The process involves:
1. Identifying areas where a standard is needed. 2. Preparing a draft (Exposure Draft) and circulating it for comments. 3. Considering feedback and finalising the standard. 4. Issuing the standard under the authority of ICAI Council.
As of now, ICAI has issued over 30 Accounting Standards (AS 1 to AS 32, with some withdrawn/merged).
Important Accounting Standards for Class 11
| AS Number | Title | Key Points |
|---|---|---|
| AS 1 | Disclosure of Accounting Policies | Requires disclosure of all significant accounting policies in the notes to accounts. |
| AS 2 | Valuation of Inventories | Inventories valued at lower of cost or net realisable value. |
| AS 9 | Revenue Recognition | Revenue is recognised when it is earned and realisable. |
| AS 10 | Property, Plant and Equipment | Fixed assets recorded at cost, depreciated over useful life. |
IFRS (International Financial Reporting Standards)
Meaning
IFRS are accounting standards issued by the International Accounting Standards Board (IASB). They are followed in over 140 countries. The aim is to bring uniformity in financial reporting across the world so that investors and other users can compare companies globally.
Convergence in India
India decided to converge its accounting standards with IFRS. The converged standards are called Ind AS (Indian Accounting Standards). The Ministry of Corporate Affairs (MCA) notified the roadmap for Ind AS implementation:
- Companies with net worth of Rs 500 crore or more — Ind AS applicable from April 1, 2016.
- Listed companies and unlisted companies with net worth of Rs 250 crore or more — Ind AS applicable from April 1, 2017.
- Other companies and entities — as notified by MCA.
Key Differences: Indian AS vs IFRS
| Aspect | Indian AS | IFRS |
|---|---|---|
| Framework | Rule-based | Principle-based |
| Scope | Applies in India | Applies globally |
| Fair value | Limited use | Extensive use |
| Presentation | Prescribed formats | Flexible formats |
| Transition | Gradual convergence | Full adoption |
The Accounting Equation
The accounting equation is the mathematical expression of the dual aspect concept. It shows the relationship between assets, liabilities, and capital.
Basic Equation
Assets = Liabilities + Capital
This equation must always balance. Every transaction affects at least two items in a way that the equality is maintained.
Extended Equation
Assets = Liabilities + Capital + Revenue - Expenses
Or equivalently:
Assets = Liabilities + (Capital + Profit)
Since Profit = Revenue - Expenses.
Effect of Transactions on the Accounting Equation
Let us understand how different types of transactions affect the equation:
| Transaction | Effect on Assets | Effect on Liabilities | Effect on Capital |
|---|---|---|---|
| Owner brings cash as capital | Cash increases (+) | No change | Capital increases (+) |
| Purchase goods for cash | Stock increases (+), Cash decreases (-) | No change | No change |
| Purchase goods on credit | Stock increases (+) | Creditors increase (+) | No change |
| Sold goods for cash (at profit) | Cash increases (+), Stock decreases (-) | No change | Capital increases by profit (+) |
| Sold goods on credit (at profit) | Debtors increase (+), Stock decreases (-) | No change | Capital increases by profit (+) |
| Paid rent | Cash decreases (-) | No change | Expense reduces capital (-) |
| Paid salary | Cash decreases (-) | No change | Expense reduces capital (-) |
| Received from debtor | Cash increases (+), Debtors decrease (-) | No change | No change |
| Paid to creditor | Cash decreases (-), Creditors decrease (-) | No change | No change |
| Owner withdraws cash (drawings) | Cash decreases (-) | No change | Capital decreases (-) |
Worked Example
Mr Sharma started a business with Rs 2,00,000 on April 1, 2025. The following transactions took place:
1. April 3: Bought furniture for Rs 20,000 2. April 5: Purchased goods for Rs 50,000 cash 3. April 8: Sold goods costing Rs 30,000 for Rs 40,000 cash 4. April 10: Paid rent Rs 5,000 5. April 12: Purchased goods on credit from Ram Rs 25,000
Let us verify the accounting equation after each transaction:
After Transaction 1: Assets: Cash 1,80,000 + Furniture 20,000 = 2,00,000 Liabilities = 0 Capital = 2,00,000 Equation: 2,00,000 = 0 + 2,00,000 (Balanced)
After Transaction 2: Assets: Cash 1,30,000 + Furniture 20,000 + Stock 50,000 = 2,00,000 Liabilities = 0 Capital = 2,00,000 Equation: 2,00,000 = 0 + 2,00,000 (Balanced)
After Transaction 3: Assets: Cash 1,70,000 + Furniture 20,000 + Stock 20,000 = 2,10,000 Liabilities = 0 Capital = 2,00,000 + Profit 10,000 = 2,10,000 Equation: 2,10,000 = 0 + 2,10,000 (Balanced)
After Transaction 4: Assets: Cash 1,65,000 + Furniture 20,000 + Stock 20,000 = 2,05,000 Liabilities = 0 Capital = 2,10,000 - Rent 5,000 = 2,05,000 Equation: 2,05,000 = 0 + 2,05,000 (Balanced)
After Transaction 5: Assets: Cash 1,65,000 + Furniture 20,000 + Stock 45,000 = 2,30,000 Liabilities = Creditors 25,000 Capital = 2,05,000 Equation: 2,30,000 = 25,000 + 2,05,000 (Balanced)
Fundamental Accounting Assumptions (GAAP)
The three fundamental accounting assumptions are part of GAAP (Generally Accepted Accounting Principles). They are presumed to be followed unless specifically stated otherwise:
1. Going Concern Assumption
As discussed under the Going Concern Concept, the business is expected to continue in the foreseeable future. Financial statements are prepared on a going concern basis unless management intends to liquidate or cease operations.
2. Consistency Assumption
As discussed under the Convention of Consistency, accounting policies are applied consistently from one period to another. A change is allowed only if required by law or if it results in better financial reporting — and such change must be disclosed.
3. Accrual Assumption
Revenue and expenses are recognised when they are earned or incurred, not when cash is received or paid. This means:
- Revenue is recorded in the period in which the sale occurs, even if cash is received later.
- Expenses are recorded in the period in which the benefit is consumed, even if payment is made later.
Example: Salary for March is paid in April. Under the accrual assumption, the salary expense is recorded in March (when the service was consumed), not in April (when cash is paid).
Common Mistakes Students Make
1. Confusing concepts and conventions: Concepts are theoretical postulates (assumptions). Conventions are customs/traditions (practices). Business entity is a concept; conservatism is a convention.
2. Saying there are only three "concepts": NCERT lists six basic accounting concepts — Business Entity, Money Measurement, Going Concern, Accounting Period, Cost, and Dual Aspect. The three fundamental assumptions (Going Concern, Consistency, Accrual) are a subset.
3. Forgetting the accrual assumption: Many students list only Going Concern and Consistency. The third fundamental assumption — Accrual — is equally important.
4. Getting the accounting equation wrong: It is always Assets = Liabilities + Capital. Never write Assets + Liabilities = Capital. Never reverse the order.
5. Not showing the equation balances after each transaction: In numerical problems, you must show the equation after every transaction and verify it balances. Skipping intermediate steps loses marks.
6. Confusing IFRS adoption and convergence: India is converging with IFRS (Ind AS), not fully adopting IFRS. There is a difference — convergence means aligning but retaining some India-specific modifications.
7. Mixing up ASB and IASB: ASB (Accounting Standards Board) is set up by ICAI for India. IASB (International Accounting Standards Board) issues IFRS globally.
Exam Tips
1. For concept-based questions, write the name of the concept, define it, give an example, and state its significance. A four-part answer fetches full marks.
2. For the accounting equation numerical, always prepare a table showing Assets, Liabilities, and Capital after each transaction. Show the running total and verify the equation balances every time.
3. For distinction questions (concepts vs conventions), use a table format with three columns: Basis, Concept, Convention.
4. For accounting standards, remember at least AS 1, AS 2, AS 9, and AS 10 by name and number. These are commonly asked.
5. For IFRS/Ind AS questions, explain the meaning, why convergence is needed, and the roadmap. Keep it brief but accurate.
6. The accounting equation is the most important numerical topic in this chapter. Practise at least 10 different transaction sets. The exam will almost certainly have a question on this.
7. Write the full form of every abbreviation: GAAP = Generally Accepted Accounting Principles, IFRS = International Financial Reporting Standards, IASB = International Accounting Standards Board, ASB = Accounting Standards Board, ICAI = Institute of Chartered Accountants of India, Ind AS = Indian Accounting Standards.
Quick Revision Notes
- Six accounting concepts: Business Entity, Money Measurement, Going Concern, Accounting Period, Cost, Dual Aspect.
- Four accounting conventions: Conservatism, Consistency, Materiality, Full Disclosure.
- Three fundamental assumptions (GAAP): Going Concern, Consistency, Accrual.
- Accounting Equation: Assets = Liabilities + Capital (always balances).
- Extended equation: Assets = Liabilities + Capital + Revenue - Expenses.
- Accounting Standards are issued by ASB of ICAI in India.
- IFRS are issued by IASB, followed in 140+ countries globally.
- India is converging with IFRS through Ind AS.
- Conservatism: Anticipate no profit, provide for all losses.
- Consistency: Same methods year after year, disclose changes.
- Materiality: Disclose significant items separately, merge insignificant.
- Full Disclosure: Disclose all material information, including contingent liabilities.
- Cost concept: Record assets at original purchase price, not market value.
- Money measurement: Record only what can be measured in money.
- Business entity: Business is separate from owner.
- Going concern: Business will continue in the foreseeable future.
- Accounting period: Divide business life into artificial time periods (usually one year).
- Dual aspect: Every transaction has two sides — debit and credit.
Related Guides:
- [Chapter 1 — Introduction to Accounting](/school/cbse/class/11/accountancy/cbse-introduction-to-accounting)
- [Chapter 3 — Recording of Transactions I](/school/cbse/class/11/accountancy/cbse-recording-transactions-1)
- [Chapter 2 Solutions — Theory Base of Accounting](/school/cbse/class/11/accountancy/solutions/cbse-theory-base-of-accounting-exercise-solutions)
- [All Class 11 Accountancy Solutions](/school/cbse/class/11/accountancy/solutions)
- [Class 11 Accountancy Subject Guide](/school/cbse/class/11/accountancy)