CA Intermediate · Taxation

Basic Concepts: CA Intermediate Taxation Chapter Guide (Income-tax Act, 2025)

Basic Concepts is the foundation chapter of Taxation Section A. It explains how the Income-tax Act, 2025 charges tax, who is taxed, in which tax year, and on what income, based on residential status. Learn the definitions, the residency tests and the heads of income first, then practise short computations and scope-of-income questions.

What this chapter covers

This chapter sets the rules of the game for Income-tax Law. It tells you what the charge of tax is, who counts as a person and an assessee, what income includes, and which period is taxed. Under the Income-tax Act, 2025, the period is called the tax year, not the assessment year. You must use the new terms in every answer.

The chapter then decides how much of a person's income is taxable in India. That depends on residential status. A resident and ordinarily resident individual or HUF, and any other resident person such as a company or firm, is taxed on global income. A resident but not ordinarily resident (RNOR) is taxed on income received or deemed received in India, or accruing or arising or deemed to accrue or arise in India, plus income accruing or arising outside India from a business controlled in India or a profession set up in India. A non-resident is taxed only on income received in India, or accruing or arising in India, or deemed to. It also covers agricultural income, which is outside the charge of tax but can affect tax on other income for some assessees. Finally, it introduces the heads of income and the flow of computation of total income.

Every later chapter in Section A depends on this one. Salary, house property, business income, capital gains, other sources, clubbing, set-off and deductions all sit inside the structure you learn here. If your basics are weak, you will lose marks in the big computation questions even when you know the later chapters.

Basic Concepts is tested through both MCQs and descriptive questions in Section A, because definitions, residency and scope of income are tested directly and also hidden inside every computation question. Residential status alone can change the whole answer to a case study. Since the chapter is mostly rules and tests, it is also one of the quickest to master and to score full marks in. A few days of careful work here saves time in every later chapter.

Basic Concepts: topics in the order to study them

1Income-tax Act, 2025 Overview and Charge of TaxStart with the big picture: what the Act charges, on whom and at what rate, so the later terms have a place to sit.
2Key Definitions: Person, Assessee and IncomeYou need the exact meaning of these terms before you can read any provision or question.
3Tax Year, Previous Year and ExceptionsOnce you know what income is, you must know which period it is taxed in and when the usual rule changes.
4Residential Status and Scope of Total IncomeThis is the core of the chapter. It uses the definitions and the year concept and decides which income is taxable in India.
5Agricultural Income and Its Tax TreatmentIt is an exception to the scope rules, so it is easiest to learn right after you know what is normally taxed.
6Heads of Income and Computation of Total IncomeThis links the chapter to the rest of the paper and gives you the standard format for every computation.

How to prepare Basic Concepts

Treat this chapter as a rule book plus a small set of repeatable techniques. Understand first, then practise until the tests run automatically.

Read the charge of tax and the key definitions once, slowly, and write each term with a one-line meaning in your own words. Use the 2025 Act terms such as tax year from day one.
Build a single-page chart of the tax year concept: the normal rule and each exception, with a one-line example for each.
For residential status, learn the basic conditions for an individual, then the additional conditions, then the rules for other persons. Practise by writing the status in a fixed order: resident or not, then ordinarily resident or not.
Make a table of income categories against status: received in India, accruing in India, accruing outside India but received in India, and income outside India. Mark taxable or not for each status.
Solve at least ten scope-of-income questions with different facts. Write the status first, then list each income as taxable or exempt from the charge, with a brief reason.
Learn the heads of income and the computation flow: income under each head, clubbing, set-off and carry forward, deductions, total income. Draw the flow from memory.
Finish with MCQs for the whole chapter, and review every wrong answer by naming the rule you missed.

Common mistakes in Basic Concepts

Using old terms such as assessment year or 1961 Act section numbers.
Fix: Use only the Income-tax Act, 2025 terms and numbers. If you are unsure of a number, state the rule in words without it.
Deciding taxability before fixing residential status.
Fix: Make status the first line of every scope answer. Then test each income item against it.
Applying the individual residency tests to companies, firms or other persons.
Fix: Keep a separate short note for each type of person and revise them side by side.
Treating all agricultural income as fully ignored, or fully taxed.
Fix: Check first whether the income qualifies as agricultural. Then check whether the assessee is one for whom aggregation for rate purposes applies.
Treating the previous-year rule as always true.
Fix: List each exception with its trigger condition and test the facts against it before using the general rule.
Writing only the conclusion in written answers.
Fix: Write the provision, the facts applied and the conclusion. Step marks are given for the reasoning even when the final figure is wrong.

Last-day revision: Basic Concepts

Use the 2025 Act's terms: tax year, never assessment year, in every answer.
Check whether the taxpayer falls within the meaning of person before applying any provision.
Tax is charged on total income of the tax year, normally the income of the previous year in the sense of the 2025 Act's rules and its exceptions.
Always decide residential status first, because it controls the scope of taxable income.
A resident and ordinarily resident individual or HUF, and any other resident person such as a company or firm, is taxed on global income.
A resident but not ordinarily resident (RNOR) is taxed on income received or deemed received in India, income accruing or arising or deemed to accrue or arise in India, plus income accruing or arising outside India from a business controlled in India or a profession set up in India.
A non-resident is taxed only on income received, accruing or arising in India, or deemed to. Income from a business controlled in India that accrues outside India is not taxed for a non-resident.
Income received or deemed received in India is taxable for every assessee. Income that accrues and is first received outside India is taxable for a non-resident or RNOR only if it comes within the accrual or deemed-accrual rules. Remitting it to India later does not make it taxable for them. A resident and ordinarily resident person is taxed on it anyway, as global income.
Agricultural income is outside the charge of tax, but check whether it is aggregated for rate purposes for the assessee.
Total income is computed head by head, then clubbing, set-off and carry forward, then deductions.
State the status, the rule and the conclusion in that order when writing scope answers.

Basic Concepts practice questions

Basic Concepts in other exams

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

Basic Concepts: frequently asked questions

Is Basic Concepts important for the exam if it has few computations?

Yes. The rules in this chapter are used in every computation question in Section A. MCQs also test definitions and residential status directly, and there is no negative marking, so these are marks you can secure.

Should I study the Income-tax Act, 1961 for this chapter?

No. From the May 2027 exam onwards, Paper 3 Section A is examined under the Income-tax Act, 2025 as amended by the Finance Act, 2026, for tax year 2026-27. Use the 2025 Act's terms and numbers only.

How long should I spend on this chapter?

Plan a few focused days, and give more time to residential status and scope of income. Then revise it briefly alongside every later chapter, since it keeps coming back.

How do I score in written questions on residential status?

Write the status first, with the conditions you tested and the days or facts you used. Then list each income item as taxable or not, with a one-line reason. This format earns step marks even if one item is wrong.