Section 42 Income Tax Act 1961: Mineral Oil Deductions and Current Section 54
Section 42 of the Income Tax Act, 1961 contained a special deduction framework for businesses engaged in prospecting for, extracting or producing mineral oils under qualifying agreements with the Central Government. From 1 April 2026, the Income Tax Act, 2025 replaced the 1961 Act, and the corresponding current provision is Section 54, titled "Business of prospecting for mineral oils."
At a glance
- Former provision: Section 42, Income Tax Act, 1961.
- Current corresponding provision: Section 54, Income Tax Act, 2025.
- Business covered: Prospecting for, extraction or production of mineral oils under a qualifying Central Government agreement.
- Main relief: Agreement-based deductions for specified exploration, drilling, related physical assets and depletion expenditure.
- Transfers: Special rules determine deduction or taxable business profit when the business or an interest in it is transferred.
What did Section 42 of the Income Tax Act 1961 provide?
Section 42 was a special computation provision for profits and gains from a mineral oil business where the Central Government had entered into the required agreement for association or participation in that business and the agreement had been laid before each House of Parliament.
Instead of relying only on the ordinary business deductions under the Act, the section allowed the deductions specified in the relevant agreement. The agreement therefore played a central role in identifying the allowance, the manner of computation and the period for which it could be claimed.
Meaning of mineral oil
For the purpose of former Section 42, the statutory explanation expressly provided that "mineral oil" includes petroleum and natural gas. The provision was therefore directed at the tax treatment of qualifying petroleum and natural gas exploration and production businesses rather than mining businesses generally.
Key deductions under former Section 42(1)
1. Abortive or infructuous exploration expenditure
The agreement could provide an allowance for exploration expenditure that became infructuous or abortive in an area surrendered before commercial production began. This dealt with exploration costs that did not result in commercial production in the surrendered area.
2. Drilling and exploration expenditure
After commercial production began, the provision covered expenditure incurred before or after commercial production on drilling or exploration activities or services and on physical assets used in connection with those activities, subject to the statutory wording applicable to the relevant agreement.
3. Depletion of mineral oil
The agreement could also provide an allowance for depletion of mineral oil in the mining area for the assessment year relevant to the previous year in which commercial production began and for the succeeding year or years specified in the agreement.
How the allowance was computed
The allowances were to be computed in the manner specified in the agreement. Former Section 42 treated the other provisions of the 1961 Act as modified to the extent necessary to give effect to those agreed terms.
Transfer of a petroleum or natural gas business under former Section 42(2)
Former Section 42(2) dealt with a transfer, wholly or partly, of the petroleum or natural gas business or an interest in that business in accordance with the qualifying agreement. The tax result depended on the relationship between the capital proceeds of transfer and the expenditure that remained unallowed.
| Situation under former Section 42(2) | Broad tax treatment |
|---|---|
| Capital proceeds were less than the expenditure remaining unallowed | The difference could be allowed as a deduction in the previous year of transfer. |
| Capital proceeds exceeded the expenditure remaining unallowed | The statutory amount of the excess could be chargeable as business profit, subject to the limits and formula in the section. |
| Capital proceeds were not less than the expenditure remaining unallowed | No further deduction for that unallowed expenditure was available for the year of transfer or subsequent years, subject to the detailed statutory rules. |
Amalgamation and demerger under former Section 42
The section contained continuity rules where, under a scheme of amalgamation or demerger, the amalgamating or demerged company transferred the business to an amalgamated or resulting company that was an Indian company. Broadly, the transfer rules did not apply to the transferor in the specified manner and continued to apply to the qualifying successor as if the business had not been transferred.
Current law: Section 54 of the Income Tax Act 2025
Section 54 of the Income Tax Act, 2025 now contains the corresponding special rule for a specified oil exploration business. It applies where the business consists of prospecting for, extracting or producing mineral oils and the statutory Central Government agreement conditions are satisfied.
Specified oil exploration business
Under Section 54, the special deduction framework applies where:
- the Central Government has entered into an agreement with the assessee;
- the agreement is for association or participation of the Central Government or a person authorised by it; and
- the agreement is laid before each House of Parliament.
Deductions under current Section 54
Section 54 continues the core structure of the former provision in clearer language. It provides for deductions relating to:
- infructuous or abortive exploration expenditure in a surrendered area before commercial production begins;
- drilling or exploration activities, services and related physical assets after commercial production begins, including qualifying expenditure incurred before production; and
- depletion of mineral oil for the tax year in which commercial production starts and the succeeding tax years specified in the agreement.
The deductions may be in lieu of, or in addition to, another allowance under the 2025 Act as specified in the agreement. They are computed in the manner stated in that agreement.
Transfer rules under current Section 54
The 2025 Act expresses the transfer computation by using three variables. This makes the old Section 42 mechanism easier to follow:
A = capital proceeds of the transfer.
B = total expenditure incurred in connection with the business or to obtain the interest in it.
C = expenditure incurred that remains unallowed.
If A is less than C, the difference is allowed as a deduction in the tax year of transfer. If A exceeds C, Section 54 specifies the amount chargeable as business profit by reference to A, B and C. The section also deals with the position where no deduction remains available and contains continuity rules for qualifying amalgamations and demergers.
Section 42 and Section 54: practical correspondence
| Income Tax Act 1961 | Income Tax Act 2025 |
|---|---|
| Section 42 | Section 54 |
| Special provision for deductions for prospecting, extraction or production of mineral oils | Business of prospecting for mineral oils |
| Used "previous year" and "assessment year" terminology | Uses the new "tax year" terminology. |
| Transfer computation stated through clauses based on transfer proceeds and unallowed expenditure | Transfer computation restated using variables A, B and C. |
Which provision should be checked now?
For tax years governed by the Income Tax Act, 2025, Section 54 is the current provision to read. Former Section 42 should still be checked where a matter, assessment, proceeding, agreement or other issue continues to be governed by the Income Tax Act, 1961 under the repeal and transitional provisions. The terms of the relevant Central Government agreement remain important because the special deduction is agreement-linked.
Official references
For verification and current compliance, refer to the official Income Tax Department resources for the Income Tax Act 2025 and the Department's archived text of Section 42 of the Income Tax Act 1961.
Editorial note: This article explains the statutory framework in general terms. The exact deduction depends on the applicable Act, the relevant tax year, the Central Government agreement and the facts of the business or transfer.