Skip to Main Content
COM5CJ301 • Income Tax Law and Accounts
Module 4
Calicut University • B.Com • Semester 5

Income Tax Law and Accounts (COM5CJ301) — Module 4: Profits and Gains of Business or Profession (PGBP)

Lecture Notes • Complete Study Material

Curricular Scope & Statutory FoundationsCALICUT UNIVERSITY • B.COM HONOURS

Module IV presents an academically rigorous, legally authoritative, and computationally thorough examination of the third specific head of income under COM5CJ301: Income Tax Law and Accounts (Calicut University B.Com Honours, Semester V Major). Governed comprehensively by Sections 28 to 44DB of the Income Tax Act, 1961, it represents the commercial and industrial foundation of direct taxation. This module examines the statutory definitions of Business [Section 2(13)] and Profession [Section 2(36)], the charging scope of Section 28, and the statutory segregation of speculative business under Section 43(5). It investigates allowable deductions under Sections 30 to 37 (rent, rates, current repairs, scientific research u/s 35, preliminary expense amortization u/s 35D, and general business deduction tests) alongside the statutory negative list (bribes, CSR spending, medical freebies). It details the Block of Assets depreciation system under Section 32 (WDV mechanics, the 180-day half-rate rule, and 20% additional depreciation). Furthermore, it decodes statutory disallowances—TDS defaults under Section 40(a), cash payments exceeding ₹10,000 under Section 40A(3), partner remuneration ceilings u/s 40(b), and actual payment requirements under Section 43B (including the landmark MSME 45-day payment rule under Section 43B(h)). It analyzes presumptive taxation regimes under Sections 44AD, 44ADA, and 44AE, culminating in comprehensive practical tax workout problems for both corporate/trading businesses and independent professionals.

Unit 1: Meaning, Definition & Scope of Business and Profession

The Income Tax Act deliberately defines business and profession with broad statutory inclusiveness to capture all commercial, industrial, vocational, and professional economic pursuits.

Section 2(13)

Definition of Business

"Business" includes:

  • Any trade (buying and selling of goods with profit motive).
  • Any commerce (commercial services, transportation, banking, warehousing).
  • Any manufacture (transformation of raw materials into a distinct commercial commodity).
  • Any adventure or concern in the nature of trade, commerce, or manufacture (even an isolated or single commercial transaction undertaken with an underlying mercantile intent).
Section 2(36)

Definition of Profession & Vocation

"Profession" includes vocation:

  • A calling requiring specialized intellectual attainment, formal academic qualification, or prolonged training (e.g., chartered accountants, advocates, medical practitioners, engineers, architects).
  • Vocation refers to any activity for which a person has a special natural fitness, skill, or talent, whether undertaken professionally or artistically (e.g., painters, authors, musicians, astrologers).

Unit 2: Incomes Chargeable under the Head PGBP (Section 28)

Section 28 represents the charging section for this head. The following categories of receipts are specifically assessable under the head "Profits and Gains of Business or Profession":

Statutory ProvisionNature of Chargeable ReceiptLegal Scope & Conditions
Section 28(i)Operational Business ProfitsThe profits and gains of any business or profession carried on by the assessee at any time during the previous year.
Section 28(ii)Management CompensationCompensation due or received upon termination or modification of agency or management contracts of an Indian company.
Section 28(iii)Trade Association ReceiptsIncome derived by a trade, professional, or similar association from specific services performed for its members.
Section 28(iiia)–(iiie)Export Incentives & GrantsProfits on sale of import licenses, Duty Drawback (DBK), cash assistance/subsidies against exports, and transfer of DEPB/DFRC scrips.
Section 28(iv)Value of Any Business PerquisiteFair value of any benefit or perquisite, whether convertible into money or not, arising from business/profession (e.g., sponsored trips, gifts).
Section 28(v)Remuneration to PartnersSalary, bonus, commission, or interest received by a partner from his firm (only to the extent allowable as deduction to the firm u/s 40(b)).
Section 28(va)Non-Compete FeesAny sum received under an agreement for not carrying out any activity or not sharing any patent, copyright, trademark, or franchise.
Section 28(vi)Keyman Insurance ProceedsAny sum received by the employer under a Keyman Insurance Policy, including allocated bonuses.
Section 28(via)Inventory to Capital Asset ConversionThe fair market value of inventory on the date of its conversion into a capital asset.
Section 41(4)Recovery of Bad DebtsAny sum recovered against a bad debt previously written off and allowed as a tax deduction.
Speculative Transactions vs. Ordinary Business [Section 43(5)]

A speculative transaction is defined under Section 43(5) as a transaction for the purchase or sale of any commodity (including stocks and shares) periodically or ultimately settled otherwise than by actual delivery.

Statutory Separation: Under Explanation 2 to Section 28, speculative business is deemed distinct and separate from any other business. Under Section 73, losses in speculative business cannot be set off against non-speculative business income or any other head; they can only be carried forward for 4 assessment years to be set off against future speculative profits.

Statutory Exceptions (Non-Speculative): Hedging contracts to guard against raw material price fluctuations, forward contracts by dealers, and trading in derivatives or commodity derivatives through recognized stock exchanges (STT/CTT paid) are legally treated as non-speculative.

Unit 3: Provisions Relating to Depreciation (Section 32)

Depreciation under the Income Tax Act is a statutory allowance granted for the diminution in value of business assets caused by wear and tear, obsolescence, or efflux of time. Unlike commercial accounting, the Income Tax Act mandates the "Block of Assets" system under the Written Down Value (WDV) method (except for power-generating units with an SLM option u/s 32(1)(i)).

3.1 Concept of "Block of Assets" [Section 2(11)] & Statutory Conditions

A "Block of Assets" means a group of assets falling within a class comprising:

  • Tangible Assets: Buildings, Machinery, Plant, Furniture, and Fittings.
  • Intangible Assets: Know-how, patents, copyrights, trademarks, licenses, franchises, or commercial rights of similar nature (acquired on or after 01-04-1998, excluding goodwill).
  • Mandatory Condition: All assets within the block must carry the exact same statutory percentage rate of depreciation.
1. Ownership: Asset must be owned (wholly or partly) by the assessee. Leased premises capital improvements qualify for tenant depreciation.
2. Use for Business: Active use as well as passive/standby use (fire equipment, standby generators) qualifies as business use.
3. Mandatory Allowance: Under Explanation 5 to Section 32(1), depreciation is mandatory; the assessee cannot forego it.

3.2 Computing Written Down Value (WDV) [Section 43(6)]

Written Down Value (WDV) Equation [Section 43(6)(c)]

Closing WDV for Depreciation = Opening WDV of Block + Actual Cost of Additions − Moneys Payable / Scrap Realization of Assets Sold or Destroyed

  • Zero or Negative WDV: If moneys payable exceeds (Opening WDV + Additions), the surplus balance is treated as Short-Term Capital Gain (STCG) under Section 50, and depreciation for that block is NIL.
  • Empty Block: If all assets in a block are physically sold/discarded, even if a monetary balance remains in the block, that balance is treated as Short-Term Capital Loss (STCL) under Section 50; depreciation is NIL.

3.3 The Half-Rate Rule (Put to Use for Less than 180 Days)

Under the first proviso to Section 32(1), where an asset is acquired during the previous year and is put to use for less than 180 days, depreciation is restricted to 50% of the prescribed depreciation rate. In a standard financial year, an asset put to use on or after October 4th (or October 3rd in a leap year) is eligible for only half the normal rate.

3.4 Statutory Depreciation Rates Table

Class of AssetSub-Category / Description of AssetsStatutory Rate
I. BuildingsPurely residential buildings (excluding hotels and boarding houses)5%
Commercial buildings, office premises, factories, hotels, godowns10%
Purely temporary erections, wooden structures40%
II. Furniture & FittingsGeneral furniture, fixtures, electrical fittings, partitions10%
III. Plant & MachineryGeneral Plant and Machinery (standard commercial rate)15%
Motor cars used for business (commercial hiring / taxi business: 30%)15% / 30%
Computers, laptops, and computer software40%
Pollution control equipment, renewable energy devices, books40%
IV. Intangible AssetsPatents, copyrights, trademarks, licenses, franchises, technical know-how25%
Additional Depreciation [Section 32(1)(iia)]

To incentivize industrial capital investments, Additional Depreciation of flat 20% is granted to assessees engaged in the manufacture of any article or in power generation/distribution on the cost of NEW plant and machinery.

Half-Rate Rule for Additional Depreciation: If new machinery is put to use for less than 180 days, additional depreciation of 10% (half of 20%) is allowed in the year of acquisition, and the remaining 10% balance is carried forward and allowed in the immediately succeeding year!

Ineligible Assets: Ships, aircraft, second-hand machinery, machinery installed in office premises or guest houses, office appliances, and road transport vehicles.

Unit 4: Allowable Deductions under Sections 30 to 37

Section 30

Rent, Rates, Taxes & Repairs for Buildings

Deduction allowed for rent paid by tenant, municipal rates and taxes, current repairs, and insurance premium. Capital expenditure on repairs or expansion is disallowed.

Section 31

Repairs & Insurance of Machinery & Furniture

Deduction allowed for current repairs (revenue expenditure incurred to preserve or maintain the asset) and insurance premiums. Cost of replacement of entire machinery is capital in nature.

4.1 Expenditure on Scientific Research (Section 35) & Preliminary Expenses (Section 35D)

  • In-House Scientific Research [Section 35(1)]: 100% deduction of revenue expenditure and capital expenditure incurred on research related to the business (except cost of land). Pre-commencement expenses on salaries and materials incurred within 3 years prior to commencement are deductible in the year of commencement.
  • Contributions to Outside Research Bodies: 100% deduction for sums paid to approved research associations, universities, IITs, or National Laboratories.
  • Amortization of Preliminary Expenses [Section 35D]: Specified preliminary expenditures (feasibility reports, MoA/AoA printing, registration fees, public issue underwriting commissions) are deductible in 5 equal annual installments (1/5th each year), capped at 5% of Cost of Project (or Capital Employed for Indian companies).

4.2 Specific Deductions under Section 36

SectionNature of ExpenditureStatutory Conditions & Constraints
Sec 36(1)(i)Insurance of Stock-in-TradePremium paid against risk of damage/destruction of stocks or stores.
Sec 36(1)(ii)Bonus or Commission to EmployeesPaid for services rendered; allowable on actual payment basis u/s 43B.
Sec 36(1)(iii)Interest on Borrowed CapitalBorrowed for business purpose. Interest on loans for asset acquisition prior to put to use must be capitalized.
Sec 36(1)(iv)/(v)Employer's PF / Gratuity ContributionContribution to Recognized PF, approved superannuation/gratuity funds. Subject to Section 43B payment rules.
Sec 36(1)(va)Employee's PF / ESI ContributionDeductible ONLY if deposited on or before the due date under PF/ESI Acts. If deposited late, 100% disallowed permanently!
Sec 36(1)(vii)Bad Debts Written OffDebt must be written off as irrecoverable in books. Mere provision is not allowed.
Sec 36(1)(xv)Securities / Commodities Transaction TaxSTT and CTT paid in ordinary course of share or commodity trading business.

4.3 General / Residuary Deduction [Section 37(1)] & Negative List

Section 37(1) acts as the omni-bus residuary clause allowing deduction for all business expenses not covered under Sections 30 to 36. An expenditure is deductible under Section 37(1) only if it fulfills four cumulative statutory tests:

1. Not covered u/s 30 to 36
2. Revenue in nature (Not Capital)
3. Not personal expenses
4. Incurred wholly & exclusively for business
Statutory Negative List / Absolute Disallowances under Section 37:
  • Illegal Purposes and Bribes [Explanation 1 to Sec 37(1)]: Any expenditure incurred for an offence or prohibited by law (bribes, secret commissions, extortion payments, fines/penalties for law violation) is strictly disallowed.
  • Corporate Social Responsibility (CSR) [Explanation 2 to Sec 37(1)]: Mandatory CSR spending under Section 135 of the Companies Act, 2013, is deemed not for business purposes and is 100% disallowed.
  • Freebies to Medical Practitioners [Explanation 3 to Sec 37(1)]: Travel tickets, hotel lodging, gifts, or financial benefits provided to doctors by pharmaceutical companies are prohibited under medical ethics and strictly disallowed.
  • Political Advertisements [Section 37(2B)]: Expenditure incurred on advertisements in souvenirs, brochures, tracts, or pamphlets published by a political party is disallowed.

Unit 5: Specific Statutory Disallowances (Sections 40, 40A, and 43B)

Amounts Not Deductible under Section 40
  • Non-Deduction of TDS on Non-Residents [Sec 40(a)(i)]: 100% of interest, royalty, or fees for technical services paid outside India or to a non-resident is disallowed if tax has not been deducted or deposited within the due date.
  • Non-Deduction of TDS on Residents [Sec 40(a)(ia)]: If tax is not deducted on payments made to residents (interest, commission, professional fees, contractor payments), 30% of such expenditure is disallowed.
  • Direct Taxes [Sec 40(a)(ii)]: Any sum paid on account of Income Tax, wealth tax, surcharge, or health & education cess is strictly non-deductible.
  • Remuneration to Partners [Sec 40(b)]: Remuneration to non-working partners is completely disallowed. Remuneration to working partners is allowed only if authorized by deed, subject to limits: on first ₹3,00,000 of book profit: ₹1,50,000 or 90% of book profit; on balance: 60%. Simple interest on partner capital is capped at 12% per annum.

Expenses Disallowable in Certain Circumstances (Section 40A)

  • Payments to Relatives / Associates [Section 40A(2)]: Assessing Officer has statutory power to disallow expenditure to the extent it is excessive or unreasonable compared to fair market value.
  • Cash Payments Exceeding ₹10,000 [Section 40A(3)]: Where an assessee makes payment or aggregate payments to a person in a single day exceeding ₹10,000 otherwise than by account payee cheque, bank draft, or electronic transfer (ECS/NEFT/RTGS/UPI), the entire 100% is disallowed. (Limit is relaxed to ₹35,000 for payments to goods transport operators). Exceptions under Rule 6DD: payments to RBI/banks, payments to Government, payments for agricultural/dairy produce to direct cultivators.
  • Provision for Unapproved Gratuity [Section 40A(7)]: Deduction disallowed for any provision made for gratuity, unless it is a contribution to an approved gratuity fund.

Statutory Deductions Allowed Only on Actual Payment Basis (Section 43B)

Section 43B specifies that certain expenditures (taxes/GST, employer PF/gratuity, employee bonus/commission, loan interest to banks/NBFCs, leave encashment provision, and railway asset fees) are allowable only in the year actually paid. These items are allowable in the year of accrual provided actual payment is made on or before the due date of filing the return of income under Section 139(1).

Finance Act 2023 Landmark Amendment: Section 43B(h) for MSME Payments

Inserted by Finance Act, 2023, Section 43B(h) mandates that any sum payable by an assessee to a Micro or Small Enterprise beyond the time limit specified in Section 15 of the MSMED Act, 2006 (within 15 days, or up to 45 days under written agreement), is allowable ONLY in the previous year in which it is actually paid.

Crucial Difference: The concession of paying up to the return filing due date u/s 139(1) DOES NOT APPLY to Section 43B(h). If payment is delayed past the MSMED deadline, the expense is compulsorily disallowed in that financial year and can be claimed only in the subsequent year of actual payment.

Unit 6: Presumptive Taxation Regimes (Sections 44AD, 44ADA, & 44AE)

To relieve small businesses and professionals from the administrative burden of maintaining books of accounts under Section 44AA and undergoing audit under Section 44AB, the Act provides special presumptive schemes:

Scheme ParameterSection 44AD (Small Business)Section 44ADA (Professionals)Section 44AE (Transporters)
Eligible AssesseeResident Individual, HUF, Partnership Firm (excl. LLP)Resident Individual, Partnership Firm (excl. LLP) in specified professionsAny assessee owning not more than 10 goods vehicles
Gross Turnover LimitUp to ₹2 Crores (raised to ₹3 Crores if cash receipts ≤ 5%)Up to ₹50 Lakhs (raised to ₹75 Lakhs if cash receipts ≤ 5%)Assessee owning ≤ 10 goods carriages at any time in the year
Presumed Net Income Rate8% of turnover (reduced to 6% for digital/banking receipts)Minimum 50% of gross professional receiptsHeavy (> 12T): ₹1,000/ton/mo; Other: ₹7,500/vehicle/mo
Deductions u/s 30 to 38Deemed fully allowed; no further deduction permissibleDeemed fully allowed; no further deduction permissibleDeemed fully allowed; no further deduction permissible

Unit 7: Practical Computation of Income from Business

When financial statements are prepared under standard commercial accounting, the Net Profit in the Profit & Loss Account does not reflect statutory taxable income. It must be adjusted through the Net Profit Adjustment Method [Section 29]:

Taxable Business Income = Net Profit as per P&L + Inadmissible Debits − Non-Business / Exempt Credits − Admissible Expenses Not Debited

Comprehensive Business Case Study: ABC Traders (Previous Year 2023–24 / AY 2024–25)

Net Profit as per P&L Account = ₹8,40,000.
• Debits: Accounting Depreciation ₹1,40,000 | Income Tax paid ₹65,000 | General Provision for Bad Debts ₹45,000 | Cash payment for goods ₹32,000 | Salary to proprietor's son ₹1,20,000 (FMV ₹80,000) | Bank loan interest unpaid before return filing due date ₹30,000 | Customs penalty for law violation ₹20,000
• Credits: Rent from residential building ₹1,20,000 | Dividend from Indian companies ₹40,000 | Interest on Fixed Deposits ₹50,000 | Bad debt recovered (previously allowed) ₹25,000
• Additional Info: Tax depreciation allowable u/s 32 on the block of assets is ₹1,85,000.

  • Net Profit as per P&L: ₹8,40,000
  • Add: Inadmissible Expenses Debited to P&L:
  • 1. Accounting Depreciation (adjusted separately) = ₹1,40,000
  • 2. Income Tax paid [Sec 40(a)(ii)] = ₹65,000
  • 3. General Provision for Bad Debts (mere provision disallowed) = ₹45,000
  • 4. Cash payment exceeding ₹10,000 [100% disallowed u/s 40A(3)] = ₹32,000
  • 5. Excessive salary to relative [Sec 40A(2): ₹1,20,000 − ₹80,000] = ₹40,000
  • 6. Bank interest unpaid before due date [Disallowed u/s 43B] = ₹30,000
  • 7. Customs penalty for law violation [Disallowed u/s 37(1)] = ₹20,000
  • Total Inadmissible Expenses Added = ₹3,72,000 (Subtotal: ₹12,12,000)
  • Less: Incomes Credited Not Taxable as Business Income:
  • 1. Rent from residential building (House Property) = ₹1,20,000
  • 2. Dividend from Indian companies (IFOS) = ₹40,000
  • 3. Interest on Fixed Deposits (IFOS) = ₹50,000
  • (Bad debt recovered ₹25,000 was allowed previously, so it remains taxable under PGBP u/s 41(4); no adjustment needed)
  • Total Incomes Deducted = ₹2,10,000 (Subtotal: ₹10,02,000)
  • Less: Admissible Deductions:
  • Statutory Tax Depreciation allowable under Section 32 = ₹1,85,000
NET TAXABLE PROFITS AND GAINS OF BUSINESS = ₹10,02,000 − ₹1,85,000 = ₹8,17,000

Unit 8: Practical Computation of Income from Profession

Professionals typically maintain accounts under the Cash System. Income from profession is determined using the Receipts and Payments Statement, isolating professional receipts from personal or capital receipts and deducting bona fide professional expenses:

Comprehensive Professional Case Study: Dr. Ananya Sen (Medical Practitioner)

Receipts: Consultation Fees ₹7,50,000 | Visiting/Surgical Fees ₹4,80,000 | Sale of Medicines ₹1,90,000 | Gifts from Patients ₹45,000 | UTI Dividend ₹25,000 | Flat Rent ₹1,80,000
Payments: Clinic Rent ₹1,20,000 | Staff Salaries ₹2,40,000 | Cost of Medicines ₹1,10,000 | Medical Books purchased 01-07-2023 ₹40,000 | Surgical Equipment purchased 01-11-2023 ₹80,000 | Motor Car Expenses ₹90,000 | LIC Premium ₹60,000 | Household Expenses ₹2,10,000
Additional Info: Motor car is used 1/3rd personal and 2/3rds professional. Depreciation rate on medical books = 40%. Depreciation on surgical equipment = 15% (put to use 01-11-2023 < 180 days).

  • Step 1: Gross Professional Receipts:
  • • Consultation Fees = ₹7,50,000
  • • Visiting / Surgical Fees = ₹4,80,000
  • • Sale of Medicines = ₹1,90,000
  • • Gifts from Patients (professional perquisite u/s 28(iv)) = ₹45,000
  • Gross Professional Earnings = ₹14,65,000
  • Step 2: Allowable Professional Expenses & Deductions:
  • • Clinic Rent = ₹1,20,000
  • • Staff Salaries = ₹2,40,000
  • • Cost of Medicines = ₹1,10,000
  • • Motor Car Expenses (2/3rd professional use: 2/3 × ₹90,000) = ₹60,000
  • • Depreciation on Medical Books (Full year @ 40% on ₹40,000) = ₹16,000
  • • Depreciation on Surgical Equipment (Put to use 01-11-2023 < 180 days: Half rate = 7.5% on ₹80,000) = ₹6,000
  • Total Allowable Professional Deductions = ₹5,52,000
NET TAXABLE INCOME FROM PROFESSION = ₹14,65,000 − ₹5,52,000 = ₹9,13,000

Unit 9: Summary Reference Matrix: Allowable vs. Disallowable Business Deductions

Item of ExpenditureTax StatusStatutory Legal Ground & Governing Section
Current Repairs to MachineryALLOWABLEAllowed as revenue maintenance expense under Section 31.
Capital Expenditure on ResearchALLOWABLE100% deduction under Section 35(1)(iv) (excluding cost of land).
Bad Debt Written Off in BooksALLOWABLEDeductible under Section 36(1)(vii) upon actual write-off.
Provision for Bad & Doubtful DebtsDISALLOWEDMere contingent provision not allowable under Section 36.
Income Tax & Education CessDISALLOWEDStrictly non-deductible personal tax charge under Section 40(a)(ii).
Cash Payment Exceeding ₹10,000DISALLOWED100% disallowed under Section 40A(3) unless covered by Rule 6DD.
Corporate Social Responsibility (CSR)DISALLOWEDDeemed non-business expenditure under Section 37(1) Explanation 2.
TDS Default on Resident Payment30% DISALLOWED30% statutory disallowance under Section 40(a)(ia) until tax is deposited.
Delayed MSME Payment past 45 DaysDISALLOWEDDisallowed in year of accrual u/s 43B(h); allowable only in year of actual payment.
COM5CJ301Income Tax Law and Accounts

Download Module 4 Notes (PDF)

Calicut University • FYUGP 2024 Syllabus

Download PDF

Finished this module?

Continue reading the next module or return to the subject overview.