CBSE Class 11 Accountancy Revision Notes Chapter 2 Theory Base of Accounting

CBSE Class 11 Accountancy Revision Notes Chapter 2 explain the Theory Base of Accounting through GAAP, accounting concepts, accounting standards and GST. For CBSE 2026 Accountancy, Chapter 2 shows how financial information becomes reliable, comparable and useful for business decisions.

Why does the same business transaction need the same accounting treatment every year? The NCERT Class 11 Accountancy chapter Theory Base of Accounting answers this through principles, concepts, rules and standards. A machine bought for ₹50,00,000, owner’s drawings, credit sales and unpaid rent cannot be recorded according to personal judgement. They need a theory base so that profit, assets, liabilities and capital are measured in a consistent way.

Chapter 2 connects accounting practice with the logic behind it. GAAP brings uniformity, basic accounting concepts guide recording, and accounting standards reduce differences in financial statement preparation. The chapter also explains double entry, cash and accrual basis, and GST as part of the wider accounting framework.

Key Takeaways

• Accounting equation: The dual aspect concept is expressed as Assets = Liabilities + Capital.
• Historical cost: An asset is recorded at purchase price, including acquisition, transport, installation and ready-to-use cost.
• Revenue recognition: Credit sales become revenue when the legal right to receive money arises.
• GST structure: Intra-state GST uses CGST and SGST, while inter-state movement uses IGST.

CBSE Class 11 Accountancy Revision Notes Chapter 2 Structure 2026

Why Accounting Needs a Theory Base

The theory base of accounting provides the rules used to record, measure and report financial transactions. It makes accounting information reliable, comparable and useful for decision-making.

The NCERT Class 11 Accountancy chapter Theory Base of Accounting explains this need through users such as owners, managers, investors, creditors, suppliers and tax authorities. These users need financial statements that follow consistent principles.

Reliability and comparability

Accounting information is reliable when users can trust the method used to prepare it. It becomes comparable when the same policies and practices are followed across firms and periods.

Inter-firm comparison checks how one firm performs against another firm. Inter-period comparison checks how the same firm performs across different years.

Why consistency matters

Consistency means using the same accounting methods over time. A firm cannot compare profits fairly if it changes depreciation or stock valuation methods without disclosure.

Consistency reduces personal bias in accounting. It also makes financial statements more useful for investors, bankers and other users.

GAAP in Class 11 Accountancy

GAAP means Generally Accepted Accounting Principles. GAAP class 11 accountancy explains the rules or guidelines used for recording and reporting business transactions.

These principles bring uniformity in the preparation and presentation of financial statements. They include concepts, conventions, assumptions and modifying principles used in accounting practice.

Meaning of GAAP

Generally Accepted Accounting Principles are the accepted rules used by accountants to prepare financial statements. They guide how transactions are recorded and reported.

Example:

Historical cost is one GAAP rule. If a business buys an asset, it records the asset at the cost supported by documents.

Why GAAP is not static

GAAP changes with legal, social and economic needs. Accounting principles develop through experience, professional bodies and government regulations.

This makes GAAP practical. It allows accounting to respond to changing business conditions and user needs.

Basic Accounting Concepts in Chapter 2

Basic accounting concepts are the broad working rules of financial accounting. They guide how transactions are identified, measured, recorded and reported.

The NCERT chapter lists 13 major concepts. These accounting concepts class 11 students use in short answers, case-based questions and financial statement logic.

Business entity concept

The business entity concept treats the business and its owner as separate entities. Accounting records are prepared from the viewpoint of the business.

Example:

When the owner brings cash as capital, the business records it as a liability to the owner. When the owner withdraws money for personal use, it is recorded as drawings.

Money measurement concept

The money measurement concept records only those transactions that can be expressed in money. Non-monetary factors like employee skill or business reputation are not recorded.

Example:

Land, computers, cash and stock are recorded in rupees. The ability of a manager is not recorded in the books.

Going concern concept

The going concern concept assumes that a business will continue for a long period. It is not expected to close in the near future.

This concept supports depreciation. A computer bought for ₹50,000 and used for 5 years can be charged as ₹10,000 per year instead of charging the full cost in one year.

Accounting period concept

The accounting period concept divides the life of a business into regular time intervals. Financial statements are usually prepared for one year.

This helps users know profit, loss, assets and liabilities at regular intervals. Listed companies may also publish quarterly results.

Cost, Dual Aspect and Accounting Equation

Cost concept and dual aspect concept directly affect how transactions enter the books. They help accountancy move from business events to measurable records.

These concepts are important in class 11 accountancy chapter 2 notes because they support asset valuation and double entry accounting.

Cost concept

The cost concept records assets at their purchase price. This includes acquisition cost, transport, installation and costs needed to make the asset ready for use.

Example:

If a plant is bought for ₹50,00,000, transport costs ₹10,000, repairs cost ₹15,000 and installation costs ₹25,000, the plant is recorded at ₹50,50,000.

This concept gives objectivity because purchase cost can be verified from documents.

Dual aspect concept

The dual aspect concept states that every transaction has a two-fold effect. At least two accounts are affected in every transaction.

Example:

Ram starts a business with ₹50,00,000 cash.

Cash increases by ₹50,00,000.

Capital also increases by ₹50,00,000.

Accounting equation

The accounting equation is:

Assets = Liabilities + Capital

This equation shows that business assets are always equal to the claims of owners and outsiders. The dual effect of every transaction maintains this equality.

Revenue, Expenses and Profit Measurement

Revenue and expenses must belong to the correct accounting period for profit measurement. Revenue recognition and matching concepts guide this process.

These concepts decide when income and expenses enter the books. They are central to theory base of accounting class 11 notes.

Revenue recognition concept

Revenue recognition means revenue is recorded when the legal right to receive it arises. Cash receipt is not always required at that time.

Example:

Credit sales are recorded as revenue on the day goods are sold. The amount is not postponed until cash is received.

Rent, interest and commission are recognised on a time basis. Rent for March belongs to March even if received in April.

Matching concept

The matching concept states that expenses of a period are matched with revenue of the same period. Profit is calculated by comparing related revenue and cost.

Example:

Salary, rent and insurance are recorded for the period to which they relate. Depreciation is spread over the years in which the asset is used.

Cost of unsold goods is deducted from cost of goods available for sale. Only the cost of goods sold is matched with sales revenue.

Disclosure, Consistency and Prudence

Financial statements are useful only when they disclose relevant information and follow stable accounting policies. Full disclosure, consistency and conservatism guide this part of accounting.

These concepts protect users from incomplete information, biased profit figures and sudden changes in accounting methods.

Full disclosure concept

The full disclosure concept requires all material and relevant facts to be disclosed in financial statements. Users need this information to judge profitability and financial soundness.

Important information may appear in the main statements or notes. Examples include changes in accounting methods and significant liabilities.

Consistency concept

The consistency concept requires the same accounting policies over time. It helps users compare financial results across years.

Example:

If straight line depreciation is used this year, it should normally be used next year too. A change can be made, but it needs proper disclosure.

Conservatism concept

The conservatism concept says profits are recorded only when realised, while expected losses are provided for. It follows the policy of playing safe.

Example:

Closing stock is valued at cost or market value, whichever is lower. Provision for doubtful debts also follows conservatism.

Materiality and Objectivity

Materiality and objectivity decide what information deserves attention and how transactions should be supported. They make accounting practical and verifiable.

These concepts help accountants avoid unnecessary details and personal bias while recording transactions.

Materiality concept

The materiality concept says accounting should focus on facts that can influence user decisions. Small items may be treated directly as expenses.

Example:

Stationery such as erasers, pencils and scales may be charged to expenses. Their small value makes detailed asset treatment unnecessary.

Objectivity concept

The objectivity concept requires transactions to be recorded using verifiable evidence. Accounting records should be free from personal bias.

Example:

A machine purchase is supported by an invoice or receipt. Historical cost supports objectivity because it can be checked through documents.

Systems of Accounting

Systems of accounting describe how transactions are recorded in books. Chapter 2 explains double entry system and single entry system.

This section is important because double entry connects directly with the dual aspect concept. It also supports the accounting equation.

Double entry system

Double entry system records both aspects of every transaction. Every debit has a corresponding credit.

This is a complete and reliable system. It helps check arithmetical accuracy through trial balance.

Example:

When goods are bought for cash, goods increase and cash decreases. Both effects are recorded.

Single entry system

Single entry system is an incomplete system of recording. It usually maintains personal accounts and cash book.

It does not record the two-fold effect of every transaction. The accounts are incomplete and less reliable.

Basis of Accounting

Basis of accounting decides when revenues and expenses are recorded. The two bases are cash basis and accrual basis.

Basis of accounting class 11 is important because profit changes depending on timing. Cash basis follows receipt or payment, while accrual basis follows earning or incurring.

Cash basis of accounting

Cash basis records transactions when cash is received or paid. It does not record income or expense when it becomes due.

Example:

Rent for December paid in January is recorded in January. Credit sales are recorded only when cash is received.

This basis is simple. It does not match revenue with related expenses properly.

Accrual basis of accounting

Accrual basis records revenues and expenses when they occur. Cash receipt or payment may happen later.

Example:

Credit sales are recorded when goods are sold. Rent due for the period is recorded even if paid later.

Accrual basis gives a better profit calculation. It matches expenses with the revenue of the same period.

Accounting Standards in Class 11

Accounting standards are written policy documents for recognition, measurement, treatment, presentation and disclosure. They bring uniformity in financial statements.

Accounting standards class 11 explains why firms need common rules. In India, accounting standards are issued by the Institute of Chartered Accountants of India.

Need for accounting standards

Accounting standards reduce differences in accounting treatment. They help users compare financial statements of different firms.

They also improve reliability. Standard rules make financial information more credible for investors, creditors and the public.

Benefits of accounting standards

Accounting standards help remove variations in accounting treatment. They also require useful disclosures that may support decision-making.

They improve inter-firm and intra-firm comparison. This helps users assess performance more fairly.

Limitations of accounting standards

Accounting standards can reduce flexibility when several treatments are possible. They may feel rigid in some business situations.

They cannot override law. Standards must work within the law, business environment and accounting practices of the country.

GST in Accountancy Class 11

GST is a destination-based tax on consumption of goods and services. It is collected through different stages, with credit for tax paid at earlier stages.

GST in accountancy class 11 explains how CGST, SGST and IGST work. The final tax burden is borne by the final consumer.

CGST and SGST

CGST means Central Goods and Services Tax. It becomes revenue of the Central Government.

SGST means State Goods and Services Tax. It becomes revenue of the State Government.

Example:

If goods worth ₹10,000 are sold within Punjab and GST is 18 percent, 9 percent CGST and 9 percent SGST apply.

CGST = ₹900

SGST = ₹900

IGST

IGST means Integrated Goods and Services Tax. It applies when goods or services move from one state to another.

Example:

If goods are sold from Madhya Pradesh to Rajasthan, IGST is charged. The revenue is shared between the Centre and State as specified.

Characteristics of GST

GST is a common tax system across the country. It is levied on goods and services at the point of consumption.

GST reduces multiple taxes such as VAT, luxury tax, entry tax and entertainment tax. It also reduces cascading effect through input tax credit.

Important Terms in Theory Base of Accounting

Theory Base of Accounting uses terms that appear in short answers, definitions and application questions. These terms form the vocabulary of class 11 accountancy chapter 2 theory base of accounting notes.

GAAP

GAAP refers to the rules and guidelines used for recording and reporting business transactions.

Accounting concept

An accounting concept is a basic assumption or working rule used in financial accounting.

Accounting equation

Accounting equation means Assets = Liabilities + Capital.

Historical cost

Historical cost is the original cost paid to acquire and prepare an asset for use.

Conservatism

Conservatism means expected losses are recorded, while unrealised gains are ignored.

Accrual basis

Accrual basis records revenue and cost when they occur, not when cash is received or paid.

Accounting standard

An accounting standard is a written accounting rule for recognition, measurement, treatment, presentation and disclosure.

GST

GST is a destination-based tax on consumption of goods and services.

NCERT-Style Questions from Theory Base of Accounting

Chapter 2 questions often ask students to identify concepts from examples. Strong answers state the concept, explain the rule and connect it to the given transaction.

Q1. Why is going concern important in accounting?

Going concern is important because it assumes that a business will continue for a long period.

Explanation:

This allows assets to be used over their estimated life. The full cost of an asset is not charged in the year of purchase.

Example:

A computer bought for ₹50,000 and used for 5 years may be charged as ₹10,000 per year.

Q2. What is the basic accounting equation?

The basic accounting equation is Assets = Liabilities + Capital.

Explanation:

It comes from the dual aspect concept. Every transaction affects at least two accounts and keeps both sides equal.

Example:

If the owner brings ₹1,00,000 cash, assets and capital both increase by ₹1,00,000.

Q3. When should revenue be recognised?

Revenue should be recognised when the legal right to receive it arises.

Explanation:

Credit sales are recorded when goods are sold, not when cash is received. Rent and interest are recognised on a time basis.

Example:

Rent for March belongs to March even if received in April.

Q4. Which concept records expected losses but ignores unrealised gains?

The conservatism concept records expected losses but ignores unrealised gains.

Explanation:

It prevents overstatement of profit and protects capital. Closing stock is valued at cost or market value, whichever is lower.

Example:

Provision for doubtful debts follows the conservatism concept.

Q5. Why is consistency needed in financial statements?

Consistency is needed to compare results across different accounting periods.

Explanation:

If a firm changes depreciation method every year, profit figures become less comparable. Any necessary change should be disclosed.

Fact:

Consistency improves inter-period comparison.

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