Section 37(1) allows any expenditure that is not covered by sections 30 to 36, is not capital, is not personal, and was laid out wholly and exclusively for the business. "Capital" is not defined, and the old shorthand — that anything buying an enduring benefit is capital — was qualified by the Supreme Court in Empire Jute: the benefit must be in the capital field, and expenditure that only lets you trade more efficiently or more profitably while leaving the fixed capital untouched stays on revenue account even if the advantage lasts. So the question is never "does this last?" but "what came into existence, and was it part of the profit-making apparatus or part of the process of earning profits?" On top of that, Explanation 1 blocks anything laid out for a purpose that is an offence or prohibited by law, and Explanation 3 — inserted by Act 6 of 2022 with effect from 1 April 2022 and widened by Act 15 of 2024 with effect from 1 April 2025 — spells out four categories that fall inside that bar. This describes section 37(1) of the Income-tax Act 1961 as it stands for assessment year 2026-27 and earlier; for income of the financial year 2026-27 onwards the same rule is section 34 of the Income-tax Act 2025.
Section 37(1) is the residuary deduction in the business head. As printed on the department's version-stamped page, it reads: “Any expenditure (not being expenditure of the nature described in sections 30 to 36 and not being in the nature of capital expenditure or personal expenses of the assessee), laid out or expended wholly and exclusively for the purposes of the business or profession shall be allowed in computing the income chargeable under the head ‘Profits and gains of business or profession’.” Four conditions are built into those words: the item must be expenditure; it must not be of a kind dealt with by sections 30 to 36; it must not be capital or personal; and it must have been laid out wholly and exclusively for the business or profession you actually carry on. Capital or revenue is one of the four, and it is the one the statute leaves undefined. Sub-section (2B) adds a separate bar on advertisement in any souvenir, brochure, tract, pamphlet or the like published by a political party, and three Explanations sit on top of sub-section (1). This is the text for assessment year 2026-27 and earlier. The 1961 Act stands repealed from 1 April 2026, and income of the financial year 2026-27 onwards is computed under the Income-tax Act 2025, where the same rule is section 34. The new section is arranged differently: sub-section (1) carries the same opening words with the cross-reference rewritten to sections 28 to 33, 44 to 49, 51 and 52; sub-section (2) gathers into one place what the 1961 Act kept apart — (a) the offence or prohibited-by-law bar, (b) the corporate social responsibility bar, and (c) the political-party advertisement bar that was section 37(2B); and sub-section (3) reproduces the four categories of Explanation 3.
Before you argue capital or revenue, check the other conditions, because cases are often won or lost on one of them instead. The opening parenthesis means section 37(1) never applies to something sections 30 to 36 already deal with: rent, rates and repairs to premises are section 30, repairs and insurance of machinery, plant and furniture are section 31, depreciation is section 32. “Expenditure” itself has a content — in *Indian Molasses* the Supreme Court held money is expended only when it is paid out or away irretrievably, so a sum the assessee could still get back was not expenditure at all. “Wholly and exclusively” does not mean “necessarily”, and *Sassoon J. David* holds that the fact somebody else is also benefited does not by itself defeat the claim. “For the purposes of the business” is wider than “for the purpose of earning profits” (*Malayalam Plantations*), but it has the limit that case also supplies: the outlay must be incurred by you in your capacity as the person carrying on that business. Borrowing to discharge a personal obligation fails on the personal-expenses and purpose limbs, not on capital (*Madhav Prasad Jatia*). And what you wrote in your books does not decide any of it (*Kedarnath Jute*) — capitalising an item in the accounts is not an admission that it is capital in law, and debiting it to profit and loss does not make it revenue.
Then there are the three Explanations, which sit outside the capital-or-revenue question and can dispose of the claim on their own. Explanation 1 declares that expenditure incurred for any purpose which is an offence or which is prohibited by law is not to be deemed to have been incurred for the purpose of the business, and no deduction is allowed. It was inserted by the Finance (No. 2) Act 1998 with retrospective effect from 1 April 1962, so it covers every year under the 1961 Act. It did not create the rule. Before it existed the same result was reached on the general words: in *Haji Aziz and Abdul Shakoor Bros*, decided on 24 November 1960 under section 10(2)(xv) of the 1922 Act, the Supreme Court held that “anything done which is an infraction of the law and is visited with a penalty cannot on grounds of public policy be said to be a commercial expense”, and that “if a sum is paid by an assessee conducting his business, because in conducting it he has acted in a manner, which has rendered him liable to penalty it cannot be claimed as a deductible expense”; *Maddi Venkataraman* carried that line to money spent in evading another statute. Explanation 1 put the rule in the statute. It is not unlimited: *Dr T.A. Quereshi* shows it bites on the purpose of the outlay and not on every loss suffered by someone whose business is unlawful, and *Prakash Cotton Mills* requires the officer to look at the scheme of the statute that imposed a levy and decide whether it is compensatory or penal in substance, whatever it is called.
Explanation 2 takes corporate social responsibility spend under section 135 of the Companies Act 2013 out of the business head. That is not the end of it: Explanation 2 operates only in computing business income under Chapter IV-D, so a contribution that independently satisfies section 80G can still be claimed there — the reasoning in *JMS Mining*, though *Polynova Industries* records that Benches differ on it, which is why the point is worth arguing but not worth assuming. Explanation 3 was inserted by Act 6 of 2022 with effect from 1 April 2022. It says the expression used in Explanation 1 “shall include and shall be deemed to have always included” expenditure incurred “(i) for any purpose which is an offence under, or which is prohibited by, any law for the time being in force, in India or outside India; or (ii) to provide any benefit or perquisite, in whatever form, to a person, whether or not carrying on a business or exercising a profession, and acceptance of such benefit or perquisite by such person is in violation of any law or rule or regulation or guideline, as the case may be, for the time being in force, governing the conduct of such person; or (iii) to compound an offence under any law for the time being in force, in India or outside India.” The words “whether or not carrying on a business or exercising a profession” are what carry clause (ii) to doctors, regulators and public servants — the *Apex Laboratories* point, now in the statute. A fourth clause was added by Act 15 of 2024 with effect from 1 April 2025, by substituting the closing words “outside India” in clause (iii) with “outside India; or (iv) to settle proceedings initiated in relation to contravention under such law as may be notified by the Central Government in the Official Gazette in this behalf”. Clause (iv) therefore has no operation except for the laws actually notified. Note the “deemed to have always included” wording: the Ahmedabad Tribunal in *AIA Engineering* and *Sun Pharmaceuticals* has held Explanation 3 prospective because it widens the disallowance against the assessee, so it does not reach years before assessment year 2022-23. Clause 21(a) of Form 3CD reports these items: the offence or prohibited-by-law category shares a row with penalty or fine for violation of any law, and there are separate rows for compounding payments and for benefits or perquisites (both added by the Income-tax (Fourth Amendment) Rules 2024 with effect from 5 March 2024) and for settlement expenditure under clause (iv) (Income-tax (Eighth Amendment) Rules 2025, with effect from 1 April 2025). Your auditor will surface them whether or not the officer asks.
Now the capital question itself. The classical test comes into Indian law through *Assam Bengal Cement*, where the Supreme Court adopted the formulation that “when an expenditure is made, not only once and for all, but with a view to bringing into existence an asset or an advantage for the enduring benefit of a trade... there is very good reason... for treating such an expenditure as properly attributable not to revenue but to capital”. The same judgment sets out the other framing you will meet: “Fixed capital is what the owner turns to profit by keeping it in his own possession. Circulating or floating capital is what he makes profit of by parting with it or letting it change masters.” And the result in that case kills the most common shortcut. The payments there were annual and recurring — protection fees of Rs 5,000 and Rs 35,000 a year — and were still held capital, because what the company acquired was “the right to carry on its business unfettered by any competition”, which “was not a part of the working expenses of the business but went to appreciate the whole of the capital asset”. Recurrence does not make an outlay revenue, and a lump sum does not make it capital: in *Alembic Chemical Works* the Supreme Court said there is “no single definitive criterion which, by itself, is determinative whether a particular outlay is capital or revenue”, that “the ‘once for all’ payment test is also inconclusive”, and that “what is relevant is the purpose of the outlay and its intended object and effect, considered in a common-sense way having regard to the business realities”.
*Empire Jute* is where the enduring-benefit test was cut down to size. The assessee paid for loom hours — the right under a working-time agreement to run its looms for more hours than its allotment. The Supreme Court held the payment revenue. Its words, in the order they appear in the judgment, are: “What is material to consider is the nature of the advantage in a commercial sense and it is only where the advantage is in the capital field that the expenditure would be disallowable on an application of this test. If the advantage consists merely in facilitating the assessee's trading operations or enabling the management and conduct of the assessee's business to be carried on more efficiently or more profitably while leaving the fixed capital untouched, the expenditure would be on revenue account, even though the advantage may endure for an indefinite future.” And then: “The test of enduring benefit is therefore not a certain or conclusive test and it cannot be applied blindly and mechanically without regard to the particular facts and circumstances of a given case.” On the facts, the Court held the amount “represented consideration paid for being able to work the loom for a longer number of hours”. Nothing was added to the profit-making apparatus; the assessee simply used the apparatus it already had, harder. The practical corollary is to ask who ends up owning the thing. Where the asset created belongs to somebody else there is usually nothing in your capital field: in *Associated Cement Companies* the pipelines and installations belonged to the municipality and the company's capital structure was unchanged; in *Lakshmiji Sugar Mills* the roads remained the Government's before and after, and the object was only to move cane more easily to the factory. *Bikaner Gypsums* runs the same logic the other way: where you already have the right to carry on the business, money spent to remove a restriction or obstruction to exercising that right buys you no new asset and is revenue. *Dalmia Jain* puts it as the question to ask about litigation costs — was the money spent to create a new asset, or to maintain and protect the business you already have?
Know-how and technical fees. The line here is between buying knowledge outright and renting access to it. In *Ciba of India* the assessee acquired only the right to draw on the Swiss parent's technical knowledge for a limited period, with no transfer of the fruits of research, and the contributions were revenue. In *Scientific Engineering House* the assessee paid for documentation — drawings, designs, charts, plans, processing data and other literature — which it kept; that was capital, and the Court held the documentation was “plant” within section 43(3), so the deduction came back as depreciation rather than as a section 37(1) write-off. *Alembic Chemical Works* is the case for an assessee whose payment improved a process it was already running: the Court found “the improvisation in the process and technology in some areas of the enterprise was supplemental to the existing business and there was no material to hold that it amounted to a new or fresh venture”, and warned that “the rapid strides in science and technology in the field should make us a little slow and circumspect in too readily pigeon-holing an outlay, such as this as capital”. So the questions are: do you keep anything when the agreement ends; is the know-how tied to a plant you are setting up or to a line you already run; and is the payment for a transfer or for a licence. Software runs on the same reasoning with an added statutory fact: know-how, patents, copyrights, trade marks, licences, franchises and other business or commercial rights of a similar nature acquired on or after 1 April 1998 are depreciable intangibles under section 32(1)(ii), so a software purchase that is capital is not a dead loss. Where the spend is on licences to use application software, the Delhi High Court in *CIT v Amway India Enterprises* (4 November 2011) dismissed the revenue's appeal, following its own earlier decision in *Asahi India Safety Glass*.
Lease premium, rent and fit-out. Rent for premises used for the business is deductible under section 30(a)(i), so it is outside section 37(1) altogether and there is nothing to fight about. The fight is over a premium. In *Panbari Tea* the Supreme Court drew the distinction: “When the interest of the lessor is parted with for a price, the price paid is premium or salami”; it “is a single payment made for the acquisition of the right of the lessee to enjoy the benefits granted to them by the lease. That general right may properly be regarded as a capital asset”, whereas “the periodical payments made for the continuous enjoyment of the benefits under the lease are in the nature of rent”, and “the real test is whether the said amount paid in a lump sum or in instalments is the consideration paid by the tenant for being let into possession”. That case decided the character of the receipt in the lessor's hands; the label a document uses does not settle it either way, and a sum called “advance rent” that is in truth the price of being let in will be read as premium. On improvements to premises you do not own, the Act supplies the answer for capital spend: Explanation 1 to section 32(1) says that where you carry on business in a building you hold on lease or other right of occupancy and incur capital expenditure on construction, renovation, extension or improvement, the structure or work is treated as a building owned by you and depreciation follows. Whether a given fit-out is capital at all is a question of fact — *Amway India* treated flooring, partitions, wiring, false ceiling, air-conditioning, furniture and network installation in leased premises as revenue under section 37(1) on the facts before it — so the two routes coexist and the characterisation has to be done item by item, not by a single entry called “leasehold improvements”. The same sort of question arises on plant, and there section 31 matters, and the tests diverge. Section 31 allows “the amount paid on account of current repairs” to machinery, plant or furniture, and its Explanation declares that current repairs do not include any expenditure in the nature of capital expenditure; section 30 carries a matching Explanation for premises. *Saravana Spinning Mills* makes the point that trips up most replies: the test under section 31(i) is not whether the spending is revenue or capital, but whether it is current repairs. A ring frame in a textile mill is an independent machine with its own function, so replacing it substitutes a new asset for an old one rather than preserving an existing one — and *Sri Mangayarkarasi Mills* holds the same even though all the machines form part of one integrated manufacturing process. An item can therefore fail as current repairs and still have to be tested separately under section 37(1), and it can fail there too if what you bought was a fresh asset. Ask what the unit of the asset is: repairing a part of a machine is repairs, buying the machine is not. The library's page on current repairs versus capital expenditure works that narrower statutory test out in full.
Expansion of an existing business, a new business, and projects that never happen. Spending to enlarge the capital base is capital whatever incidental help it gives the trade: share issue expenses in *Brooke Bond India* and the Registrar of Companies fee for raising authorised capital in *Punjab State Industrial Development Corporation* were both held capital because the outgoing was directly related to expansion of the capital base. Section 35D is the relief valve. It lets an Indian company, or a resident person other than a company, amortise specified expenditure incurred before the business commences, or after commencement in connection with the extension of the undertaking or the setting up of a new unit — one-fifth in each of five successive years for expenditure incurred after 31 March 1998, and only up to 5% of the cost of the project or the capital employed. Its sub-section (2) lists the qualifying categories, and they include expenditure in connection with a public issue of shares or debentures, which is why the section and *Brooke Bond* are not in conflict: *Brooke Bond* concerned expenditure section 35D did not reach. You still have to land inside a listed category — in *Majestic Auto* the Punjab and Haryana High Court refused the Revenue's attempt to bring a management consultant's fee for a study on reorganising the existing core business within section 35D without showing that it fell in one of them. So the sequence is: if the spend relates to the business you already carry on and creates nothing in the capital field, claim it under section 37(1) in full; if it relates to a business you do not yet carry on, section 37(1) fails on the purpose limb (*Malayalam Plantations*) and section 35D is the route, for listed categories only. Where a project is abandoned, the same question decides it — whether any capital asset or advantage actually came into existence, and whether the project was an extension of the running business or a new one — but see the gaps note: I have not verified a specific High Court authority on abandoned-project write-offs and have therefore not cited one.
What each side has to show. The section is worded as a set of conditions on the claim, so you have to put material on record: what was bought, under what contract, for how long, what you are left with when it ends, how it was used in the business, and why the payment was made. The officer cannot stop at “the benefit will last more than a year”. *Empire Jute* requires him to consider the nature of the advantage in a commercial sense and place it in the capital field — to name the asset created or the addition to the profit-making apparatus — and if all he can point to is that you now trade more efficiently, he has not made the case. He also cannot substitute his own view of whether the expenditure was needed: “wholly and exclusively” is not “necessarily” (*Sassoon J. David*). Where he relies on Explanation 1 or Explanation 3, he has to identify the law said to be infringed and, for Explanation 3(ii), the rule or guideline governing the recipient's conduct; for clause (iv) he has to point to the Central Government notification, because an unnotified law is outside it. If the finding of capital stands, argue the fallback in the same reply rather than later: depreciation under section 32 if the asset is depreciable, including intangibles under section 32(1)(ii) and leasehold structures under Explanation 1 to section 32, or amortisation under section 35D if the expenditure is within section 35D(2).
The label decides how much you get and when. Revenue means the whole amount comes off this year. Capital means, at best, depreciation at the rate for the block, or one-fifth a year for five years under section 35D — and at worst, where section 35D does not reach the expenditure, nothing at all. The tax is not the only cost either: a capital finding is a finding of fact, and facts are hard to reopen on further appeal, so the record you build in the first reply is usually the record you are stuck with.
The timing point cuts both ways. If the officer is right that the spend was capital, the deduction is not lost so much as moved, and you want it moved onto a depreciation block or into a section 35D amortisation in the same order rather than left hanging. If he is wrong, the year is the year, and you cannot pick the claim up again later because it was disallowed once.
I paid a foreign firm a lump sum for technical know-how that raised the yield of a product I was already making. The Assessing Officer says section 37(1) is shut because I bought an asset of enduring benefit. Is the payment capital?
Can a pharmaceutical company deduct the cost of gifts given to doctors?
I pay an annual fee to keep competitors out of my area. It recurs every year, so is it revenue expenditure?
My employee embezzled money from the business bank account. Can I write that off for tax?
I spent heavily doing up my premises and plant. Is that 'current repairs', or has the AO rightly called it capital?
My s.35D claim is capped at 5% of capital employed. Does the share premium I collected count as capital employed?
My liability is certain but I cannot put a final figure on it yet and I will not pay it for years. Can I still deduct the provision?
I paid to have a railway station moved off my own mining lease so I could work the ground under it. Is that capital expenditure?
Every page in this library links to what it was written from, so you can check it rather than take our word for it.
