CA Inter Income-Tax Law: Complete Study Guide & Weightage

Income-tax Law at CA Intermediate level demands precision, concept clarity, and relentless practice. Unlike Foundation, Inter taxation is heavier on computation, case laws, and practical application—and examiners test both micro-details and big-picture understanding. This guide maps the entire syllabus, shows you where the marks cluster, flags the traps, and connects you to the faculty and materials that work.

Why Income-tax Law Matters in Your CA Journey

Income-tax constitutes one of the two taxation papers at Intermediate (the other being GST). In a typical exam, 15–17 marks come from income-tax law alone (depending on your exam slot and paper pattern). More importantly, mastery here builds your foundation for Advanced taxation and real-world practice. A CA who cannot compute taxable income accurately or apply exemptions correctly will lose credibility quickly.

The Inter syllabus is not just theory—it's computation-heavy. You'll calculate depreciation, capital gains, deductions, and tax liability across multiple scenarios. Speed and accuracy matter as much as concept.

CA Inter Income-tax Law Syllabus Overview

The ICAI syllabus for CA Intermediate Taxation (Paper 3A, new scheme) includes:

• Income – Computation and Disallowances (Chapters 1–7)
• Capital Gains (Chapter 8)
• Income from Other Sources (Chapter 9)
• Losses (Chapter 10)
• Deductions from Gross Total Income (Chapter 11–14)
• Tax on Different Types of Income (Chapter 15–17)
• Advance Tax & TDS (Chapter 18–19)
• Computation of Taxable Income & Tax Liability (Chapter 20–21)
• Assessments & Procedural Aspects (Chapter 22–24)

Note: Always verify the current syllabus with the latest ICAI notification, as minor restructurings occasionally occur.

Chapter-Wise Weightage & Marks Distribution

Based on past 5–6 exam windows and faculty consensus, here's the realistic distribution:

Key takeaway: Deductions, Salary, and Capital Gains together account for ~45% of your marks. If you master these three chapters, you've already secured a strong base score.

Detailed Chapter-Wise Strategy

Chapters 1–3: Income from Salary

This chapter tests your understanding of what is salary, what is not, and how to compute taxable salary.

Key topics: Basic salary, dearness allowance (DA), house rent allowance (HRA), transport allowance, special allowances, perquisites (SOP valuation), allowances specifically excluded under s.10.

Common mistakes:

• Forgetting that HRA is either actual received or 50% of basic (or 40% for metro cities) or nil—the minimum matters, not always the maximum.
• Misinterpreting SOP perquisite valuation; many students compute it wrong because they confuse the formula.
• Not recognising that certain allowances (e.g., dearness relief, uniform allowance) are fully exempt under s.10.

Exam approach: Salary questions always come as full computations (4–5 marks). Practice atleast 15–20 varied salary scenarios to internalise the computation flow. Tabulate your calculation—examiners award step marks even if the final answer is wrong.

Chapter 4–5: Income from House Property

Relatively stable chapter, but tricky on self-occupied vs. let-out property, notional rent, and municipal taxes.

Key topics: Gross Annual Value (GAV), annual value, deductions (municipal taxes, repairs, insurance, interest on borrowed capital), shortfall of income.

Common mistakes:

• Assuming depreciation is allowed on house property (it's not, except for plant & machinery within the property).
• Miscalculating municipal tax deduction when payment is irregular or in arrears.
• Forgetting that annual value becomes ₹0 if the property is self-occupied and not rented.

Exam approach: Usually 2–3 marks from this chapter. Focus on the notional rent scenario (when a property is self-occupied but GAV is available). Practise 5–6 full computations to be safe.

Chapters 6–7: Income from Business or Profession

The widest and most application-heavy chapter. Covers profit computation, disallowances, reserves, and the entire machinery of business income.

Key topics: Gross profit, adjustments (depreciation, amortisation, disallowances under s.37, s.40, s.43B), closing stock valuation, specific disallowances (entertainment, expenses for self, illegal activities, interest on capital).

Common mistakes:

• Confusing disallowances under s.37 (not incurred for the purposes of the business) with s.40 disallowances (payment/accrual conditions not met).
• Forgetting that opening and closing stock must be accounted for correctly; many students miss closing stock entirely.
• Not recognising section 43B disallowances (bonus, gratuity, and certain statutory payments are disallowed if not paid within 30 days of the year-end).
• Miscalculating depreciation when assets are purchased mid-year or sold.

Exam approach: Expect a 8–10 mark computation question combining profit calculation, disallowances, and sometimes capital gains. Practise at least 10 full scenarios from your question bank. Build speed; these questions consume 12–15 minutes if you're not careful.

Chapter 8: Capital Gains

High weightage. Tests your grasp of long-term vs. short-term, holding period, Cost Inflation Index (CII), exclusions, and tax rates.

Key topics:

• Holding period: 36 months for most assets = long-term; less = short-term. (Note: For listed securities and equity funds, 12 months.)
• LTCG u/s 112A: Tax at 20% + surcharge + cess (after indexation benefit).
• STCG u/s 111A (equity): Tax at 15% + surcharge + cess (applicable to shares/equity funds on which STT was paid).
• CII indexation: Base year is 2001–02; always verify the current CII figure from the latest CBIC notification.
• Exemptions: Agricultural land, residential property u/s 54, u/s 54F, u/s 54EC (bonds).

Common mistakes:

• Confusing the holding period thresholds; students often mix up 12 months and 36 months.
• Forgetting that Cost Inflation Index (CII) is applied only for LTCG, not STCG.
• Miscalculating indexed cost of acquisition when CII changes year to year.
• Not recognising that u/s 54 and u/s 54F exemptions are subject to reinvestment conditions and holding period of 2 years for the new property.

Exam approach: Expect 2–3 marks of direct capital gains questions, often paired with deductions or other income heads in a composite computation. Practise indexation calculations until they become automatic. Bookmark the latest CII table.

Chapter 9: Income from Other Sources

Includes interest, dividend, royalty, rental income from plant & machinery, and miscellaneous income.

Key topics: Gross total income (GTI), income recognition, dividend from domestic companies (exempt if received from specified domestic companies under certain conditions), interest income, cash gift exemptions, section 56 (unexplained cash income).

Common mistakes:

• Assuming all dividends are exempt; only dividends from specified domestic companies are fully exempt (subject to tax on the company).
• Forgetting that interest u/s 56(2)(v) on money borrowed is taxable as IOSL, not a deduction.
• Misunderstanding section 56 (cash gifts / unexplained money); gifts from relatives are exempt, but gifts from non-relatives are taxable.

Exam approach: Usually 1–2 marks from straightforward questions. Familiarise yourself with exemptions under s.10 (interest on certain bonds, dividend, etc.). Practise the section 56 scenario questions.

Chapter 10: Losses

Tests your understanding of loss set-off and carry-forward rules—critical for multi-income scenarios.

Key topics:

• Loss set-off within the same year: Loss from one source can set off income from another (with caveats). Speculative loss can only set off speculative income.
• Carry-forward: Loss of profit/gains is carried forward for 8 years; speculative loss for 4 years.
• Restrictions: Loss from house property cannot set off income of any other source (except within house property); loss from speculative business cannot set off other income.

Common mistakes:

• Trying to set off loss from house property against salary income (not allowed).
• Forgetting that a speculative loss can only be carried forward to be set off against speculative income.
• Not recognising the 8-year carry-forward for normal losses and 4-year for speculative.

Exam approach: Appears as part of composite computation questions. Ensure you understand the restriction rules deeply; questions often test edge cases (e.g., loss from speculative business + loss from house property in the same year).

Chapters 11–14: Deductions from Gross Total Income (Chapter 80 Clauses)

This is the highest-weightage chapter (18% of total marks). Covers investment-based deductions (80C, 80CCC, 80CCD), health deductions (80D, 80DD, 80DDB), and special deductions (80E, 80G, 80TTB, etc.).

Key topics:

• Section 80C (₹1,50,000 limit): Life insurance premium, provident fund, NSC, ELSS, children's tuition fees, repayment of education loan principal.
• Section 80D (₹25,000 / ₹50,000): Health insurance premium for self & family (₹25,000) and parents (₹25,000 additional, or ₹50,000 if parents are senior citizens).
• Section 80DD (₹75,000 / ₹1,25,000): Disability-related expenses.
• Section 80E: Interest on education loan (no limit, full deduction allowed).
• Section 80G (50% / 100%): Donations to specified charities and relief funds.
• Section 80TTB (₹50,000 limit for senior citizens over 60 years): Interest income from bank savings, fixed deposits, and post office accounts.

Common mistakes:

• Confusing the ₹1,50,000 limit of 80C with overlapping categories; students often double-count life insurance and provident fund contributions.
• Forgetting that 80D for parents is additional; the limit is ₹25,000 for self & spouse, then ₹25,000 extra for parents (or ₹50,000 if senior citizen).
• Not recognising that 80TTB applies only to interest income and is available only to senior citizens (age 60+). Also, the deduction is capped at ₹50,000 or the actual interest received, whichever is lower.
• Misunderstanding 80G: donations must be to specified charities; percentage deduction depends on the type of donation (50% for general donations, 100% for certain donations like PM Relief Fund).

Exam approach: Expect 3–4 marks directly from deductions, usually in a standalone question or embedded in a GTI-to-taxable-income computation. Build a cheat sheet listing all limits and conditions. Practise 20+ deduction scenarios.

Chapters 15–17: Tax on Different Types of Income & Tax Rates

Covers surcharge, cess, applicable tax rates, and special tax regimes (like presumptive taxation under s.44AD, s.44AE).

Key topics:

• Tax rates: Slab system (e.g., 0–2.5L, 2.5–5L, etc.); surcharge and cess apply on top.
• Rebate u/s 87A: Available to individuals with taxable income up to ₹5,00,000 (limit may change; verify with latest CBIC); rebate is capped at tax payable or ₹12,500, whichever is lower. Important: Rebate is not available for LTCG u/s 112A, but is available for STCG u/s 111A.
• Presumptive taxation: Under s.44AD (professionals, partnerships), income is deemed to be a certain % of turnover; under s.44AE (transport), ₹1,850 per day is presumed. These regimes allow reduced documentation and lower tax.

Common mistakes:

• Applying rebate 87A when LTCG is in the income (rebate is not available for LTCG u/s 112A).
• Confusing surcharge rates; surcharge depends on the type of income and the total income slab.
• Not recognising that presumptive taxation is optional and must be formally declared in the return.

Exam approach: Appears as the final step in computation questions. Know the current tax slabs and surcharge rates by heart. Practice at least 5 full tax liability computations.

Chapters 18–19: Advance Tax & Tax Deducted at Source (TDS)

Tests your understanding of payment obligations and credit mechanisms.

Key topics:

• Advance tax: Four due dates (15 June, 15 Sept, 15 Dec, 15 Mar). Payment is mandatory if estimated tax liability exceeds ₹10,000 (verify with latest CBIC).
• TDS: Deducted by employers on salary, by banks on interest, by builders on rent, etc. TDS credit is claimed in the return.

Common mistakes:

• Not understanding that assessees declaring income under presumptive taxation must still pay advance tax by 15 March if estimated tax liability exceeds the threshold (commonly missed).
• Confusing the TDS payment date with the TDS deposit date; TDS must be deposited by the 7th of the following month.

Exam approach: Usually 1–2 marks from procedural questions. Memorise the advance tax due dates and understand the credit mechanism for TDS.

Chapters 20–21: Computation of Taxable Income & Total Tax Liability

This is where everything comes together. You'll compute Gross Total Income (GTI), deductions, taxable income, and total tax liability in one flow.

Common pitfalls:

• Ignoring section headings and restrictions. Always check if a deduction is allowed / restricted based on the type of income or the taxpayer's profile.
• Forgetting to compute tax on different income heads separately. LTCG and STCG often have different tax rates; compute them separately before aggregating.
• Not reconciling carried-forward losses from prior years.

Exam approach: Most exams include a 10–15 mark composite computation question combining salary, business, capital gains, and deductions. This is your opportunity to score heavily if you've practised. Practise atleast 8–10 full multi-income scenarios.

Chapters 22–24: Assessment Procedure & Penalties

Lower weightage, but essential for a holistic understanding. Covers self-assessment, notice procedures, and penalties.

Key topics: Self-assessment tax, notice under s.139(1) (issued by the AO to file return), notice under s.143(2) (for scrutiny), interest on late payment of tax, penalties for non-filing or under-reporting of income.

Exam approach: Usually 1–2 marks of straightforward questions. Familiarise yourself with the procedure and key timelines.

Preparation Strategy for CA Inter Income-tax Law

Phase 1: Concept Clarity (Weeks 1–4)

Watch video lectures from an expert faculty member. Lecturers like CA Vivek Gaba deliver structured Income-tax Law lectures that break down complex provisions into digestible segments. Alternatively, CA Vijender Aggarwal's lectures or CA Pranav Chandak's courses are equally well-regarded for their depth and clarity.

During this phase, do not attempt questions yet. Focus on understanding the provision, its purpose, and the key conditions. Maintain a notebook with key points, limits, and exceptions.

Phase 2: Targeted Practice (Weeks 5–10)

Practise chapter-wise questions from a dedicated question bank. The CA Inter Income Tax Question Bank & MCQ is a compact, MCQ-focused resource that tests conceptual understanding. For deeper, computation-style practice, use CA Amit Mahajan's IDT Question Bank, which includes both MCQs and case-study problems.

Solve at least 3–5 questions per topic, gradually building speed. Mark your weak areas and revisit them.

Phase 3: Integration & Speed (Weeks 11–16)

Practise full computation scenarios combining multiple income heads and deductions. Time yourself; aim to solve a 12-mark computation question in 15–18 minutes. Use DT Smart Class Notes & Question Bank or comprehensive book sets like CA Vivek Gaba's Taxation (DT & GST) Books for well-structured practice scenarios.

Simulate exam conditions: solve 40–50 marks in 45–50 minutes, maintaining accuracy and clarity in your working.

Phase 4: Revision & Mockups (Weeks 17–20)

Revise key concepts, limits, and exceptions in a condensed format. Take 2–3 full-length mock exams to identify remaining gaps and build confidence. After each mock, analyse your errors rigorously—did you misread the question, forget a provision, or miscalculate?

In your final week, skim through the ICAI study material once more, focusing on amendments and recent case law summaries.

Common Mistakes & How to Avoid Them

Common Mistake	Why It Happens	How to Avoid
Forgetting to index capital gains for LTCG	Students compute LTCG without CII; forget that indexation is mandatory for inflation adjustment.	Always create a separate column for CII calculations. Bookmark the CII table. Practice at least 10 indexation problems until automatic.
Confusing depreciation rates (especially 25% vs. 40%)	Multiple rates exist for different assets; easy to mix them up.	Create a one-page depreciation rate cheat sheet. Intangible assets (patents, trademarks) are 25%; plant & machinery varies. Memorise the key ones.
Not recognising 80TTB eligibility (age 60+)	Students apply 80TTB to all individuals, forgetting it's restricted to senior citizens.	Before any deduction question, check the assessee's age. Write "Check: Senior Citizen?" as a habit.
Applying rebate 87A to LTCG	Rebate is available only for STCG u/s 111A, not LTCG u/s 112A. Many students assume it applies universally.	Memorise: "Rebate 87A = STCG only (u/s 111A)." Write this on your exam rough sheet.
Missing loss carry-forward restrictions	Students forget that speculative loss carries forward for 4 years (not 8), and house property loss cannot set off other income.	Create a loss matrix: Profit/Gain Loss (8 yrs) | Speculative Loss (4 yrs) | House Loss (restricted). Refer it during practice.
Miscalculating HRA exemption	HRA calculation has multiple conditions (actual, 50% basic, metro vs. non-metro). Easy to apply the wrong formula.	Write out the HRA formula as: MIN(Actual HRA received, 50% of basic*, Excess over 10% of salary). *40% in 4 metros. Practise 5+ HRA scenarios.

Pro Tips for Exam Success

• Handwrite your working step-by-step. Even if you get the final answer wrong, examiners award partial marks for correct methodology. A tabulated computation shows clarity and builds examiner confidence.
• State the section number and its condition. For example, write "LTCG u/s 112A @ 20% as holding period > 36 months" instead of just "LTCG tax = ₹X". This demonstrates understanding.
• Verify limits and exceptions before answering. Many questions are designed to test whether you know the conditions of a provision, not just its basic mechanism. Always ask: "Is this deduction allowed? Is there a limit? Any restrictions for this assessee?"
• Use the ICAI study material as the source of truth. If your textbook or a faculty member contradicts the ICAI study material, trust ICAI. The exam follows ICAI's interpretation.
• Create flashcards for all limits and rates. In your final two weeks, dedicate 10 minutes daily to reviewing: ₹1,50,000 (80C limit), ₹50,000 (80TTB limit), 36 months (LTCG holding period), 20% (LTCG tax rate), etc.
• Practise thousands of free MCQs on the Conferenza app. These are short, concept-focused, and ideal for quick testing of your memory and logic. Aim to solve atleast 200+ MCQs over your preparation period.

Practice Questions