Chapter IV - Computation of Total Income
Section 33
Section 33: deduction for depreciation on business assets
Section 33 is the core depreciation provision for computing income from business or profession. It covers tangible assets (buildings, machinery, plant, furniture) and specified intangible assets acquired on or after 1 April 1998, owned wholly or partly and used wholly and exclusively for the business or profession.
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This article is for general information. Refer to the Income-tax Act, 2025 as amended by the Finance Act, 2026 and the Taxation and Other Laws (Amendment) Act, 2026 for the official provisions. If you need professional advice for your situation, contact Bizeneed.
Statutory text
Bare law
(1) A deduction in respect of depreciation of— (a) buildings, machinery, plant or furniture, being tangible assets; (b) know-how, patents, copyrights, trademarks, licences, franchises or any other business or commercial rights of similar nature, being intangible assets acquired on or after the 1st April, 1998, not being goodwill of a business or profession, owned wholly or partly by the assessee and used wholly and exclusively for the purposes of the business or profession, shall be allowed, as per the provisions of this section.
(2) In case of assets referred to in sub-section (1) of an undertaking engaged in generation or generation and distribution of power, the deduction in respect of depreciation shall be such percentage of its actual cost to the assessee, as may be prescribed.
(3) (a) In case of any block of assets, deduction in respect of depreciation shall be such percentage of its written down value, as may be prescribed; (b) when any building, machinery, plant or furniture is partly, or not wholly and exclusively, used for the purposes of the business or profession, the deduction under clause (a) shall be restricted to the fair proportionate part thereof as determined by the Assessing Officer, having regard to the usage of such building, machinery, plant or furniture for the purposes of the business or profession; (c) when deduction of actual cost in respect of any machinery or plant has been allowed under section 54, no deduction under this sub-section shall be allowed.
(4) The deduction under this section shall be restricted to 50% of the prescribed rate, if such asset, being asset referred to in sub-sections (2) and (3) is–– (a) acquired by the assessee during the tax year; and (b) put to use for the purposes of business or profession for less than one hundred and eighty days in that tax year.
(5) The aggregate deduction in respect of depreciation allowable to the predecessor and successor in cases of succession under section 70(1)(zd) or (ze) or (zf), or section 313, or to the amalgamating and the amalgamated company in the case of amalgamation, or to the demerged and resulting company in the case of demerger, as the case may be, for any tax year, shall not exceed the deduction calculated at the prescribed rates under this section as if the succession, amalgamation or demerger had not taken place, and such deduction shall be allowed on pro rata basis based on number of days for which assets were used by the following:–– (a) predecessor and successor, in case of such succession; or (b) amalgamating company and the amalgamated company in case of an amalgamation; or (c) demerged company and the resulting company in case of a demerger.
(6) Where a building, not owned by the assessee, is held on lease or by any other right of occupancy is used for the purposes of business or profession of the assessee, and if any capital expenditure is incurred by the assessee for the purposes of business or profession on construction of any structure or any work by way of renovation, extension or improvement to such building, then such structure or work shall be treated as a building owned by the assessee for the purposes of this section.
(7) The provisions of this section shall apply whether or not the assessee has claimed deduction for depreciation in computing his total income.
(8) In addition to deduction under sub-section (3), additional deduction in respect of depreciation for any new machinery or plant shall be allowed, when— (a) the assessee is engaged in the business of manufacture or production of any article or thing or in the business of generation, transmission or distribution of power; (b) the assessee acquires and installs the new machinery or plant; (c) the new machinery or plant is first put to use by the assessee for the purposes of business; and (d) the new machinery or plant (not being a ship or an aircraft)— (i) was not used either within or outside India by any other person before its installation by the assessee; (ii) is not installed in any office premises or any residential accommodation, including accommodation in the nature of a guest house; (iii) is not in the nature of any office appliances or road transport vehicle; or (iv) is not an asset on which the whole of the actual cost is allowed as a deduction (whether by way of depreciation or otherwise) in computing the income under the head “Profits and gains of business or profession” of any tax year.
(9) The additional deduction in respect of depreciation referred to in sub-section (8) shall be–– (a) 20% of the actual cost of the new machinery or plant in the tax year when it is acquired and put to use, subject to the provisions of clause (b); or (b) 10% of the actual cost, if the new machinery or plant is acquired and put to use for less than one hundred and eighty days in the relevant tax year, and 10% of the actual cost shall be allowed in the immediately succeeding tax year.
(10) The difference between the written down value and the moneys payable including the scrap value, if any, for any tangible asset in respect of which depreciation is claimed and allowed under sub-section (2), shall be allowed as deduction when— (a) such asset is sold, discarded, demolished or destroyed in the tax year not being the tax year in which it is first put into use; (b) the moneys payable including the scrap value, if any, is less than its written down value; and (c) such deficiency is actually written off in the books of account of the assessee.
(11) (a) Where the profits and gains chargeable for the tax year before allowing the deduction under sub-sections (1) to (10) is less than such allowable deduction, then–– (i) if such profits and gains is not a loss, the deduction under sub-sections (1) to (10) shall be allowed to the extent of the available profits and gains; (ii) if such profits and gains is a loss, no deduction under sub-sections (1) to (10) shall be allowed; (b) the amount of deduction which has not been allowed under clause (a) shall be added to the allowable deduction under this section, whether available or not, for the succeeding tax year and the total amount shall be deemed to be eligible for deduction in that year, and so on for the succeeding tax years; and (c) the provisions of this sub-section shall be subject to the provisions of sections 112(3) and 113(4).
(12) For the purposes of this section,–– (a) “assets” mean— (i) tangible assets, being buildings, machinery, plant or furniture; (ii) intangible assets being–– (A) know-how; or (B) patents; or (C) copyrights; or (D) trademarks; or (E) licences; or (F) franchises; or (G) any other similar business or commercial rights, but not being goodwill of a business or profession; (b) “know-how” means any industrial information or technique likely to assist in the manufacture or processing of goods or in the working of a mine, oil-well or other sources of mineral deposits (including searching for discovery or testing of deposits for the winning of access thereto); (c) “sold” includes a transfer by way of exchange or a compulsory acquisition under any law for the time being in force but does not include a transfer, in a scheme of amalgamation, of any asset by the amalgamating company to the amalgamated company where the amalgamated company is an Indian company or in a scheme of amalgamation of a banking company, as referred to in section 5(c) of the Banking Regulation Act, 1949 with a banking institution as referred to in section 45(15) of the said Act, sanctioned and brought into force by the Central Government under section 45(7) of that Act, of any asset by the banking company to the banking institution; (d) “written down value of the block of assets” shall have the same meaning as in section 41(1)(c).
Introduction
Depreciation follows the statutory block and written-down-value system. First confirm ownership and business use; then account for additions, disposals, the use period and any separate additional allowance.
Key takeaways
Qualifying depreciable assets
Depreciation can be deducted for specified tangible assets and qualifying intangible rights, but goodwill is excluded.
Ownership and business use
The qualifying asset must be owned wholly or partly by the taxpayer and used wholly and exclusively for business or profession, subject to proportionate-use rules.
Short first-year use
A reduced rate applies to specified assets acquired during the tax year and put to business use for less than 180 days that year.
What qualifies for depreciation
Section 33(1) allows depreciation on tangible assets - buildings, machinery, plant or furniture - and on intangible assets such as know-how, patents, copyrights, trademarks, licences, franchises or similar business/commercial rights acquired on or after 1 April 1998 (goodwill is expressly excluded), where the assessee owns the asset wholly or partly and uses it wholly and exclusively for the business or profession.
For power-generation/distribution undertakings, Section 33(2) allows depreciation at a prescribed percentage of actual cost, rather than on the block-of-assets basis.
Block of assets and the written down value method
For other assets, Section 33(3) allows depreciation as a prescribed percentage of the written down value of the relevant block of assets.
Where a building, machinery, plant or furniture is used only partly for business or profession, the deduction is restricted to the fair proportionate part determined by the Assessing Officer, based on actual business usage.
No depreciation is allowed under this sub-section on any machinery or plant whose actual cost has already been allowed as a deduction under Section 54.
The 180-day rule and other key conditions
- If an asset (under sub-sections (2) or (3)) is acquired during the tax year and put to use for business/profession for less than 180 days in that year, the depreciation deduction is restricted to 50% of the prescribed rate.
- On succession, amalgamation or demerger, the combined depreciation claimed by predecessor/successor or amalgamating/amalgamated or demerged/resulting entities cannot exceed what would have been allowable had the reorganisation not taken place, and is apportioned on a pro-rata, days-used basis.
- A building held on lease or other right of occupancy (not owned by the assessee) is treated as owned by the assessee, for depreciation purposes, to the extent of capital expenditure incurred on construction, renovation, extension or improvement.
- Depreciation applies whether or not the assessee has actually claimed it while computing total income.
Additional depreciation on new plant and machinery
Section 33(8) and (9) allow an additional depreciation deduction for assessees engaged in manufacture/production of an article or thing, or in generation/transmission/distribution of power, on new machinery or plant that meets specified conditions (not previously used by anyone else before installation, not installed in office premises or residential accommodation, not an office appliance or road transport vehicle, and not fully written off under any other provision).
| Condition | Rate of additional depreciation |
|---|---|
| New machinery/plant acquired and put to use during the tax year | 20% of actual cost |
| New machinery/plant put to use for less than 180 days in the tax year | 10% of actual cost in that year, and the balance 10% in the immediately succeeding tax year |
Terminal (balancing) depreciation and carry-forward
Section 33(10) allows the shortfall between an asset's written down value and the moneys payable (including scrap value) as a deduction when a tangible asset is sold, discarded, demolished or destroyed - other than in the year it is first put to use - and the deficiency is actually written off in the books.
Section 33(11) provides that if depreciation exceeds the profits and gains available for the tax year, the unabsorbed portion is added to the following year's allowable depreciation and carried forward in the same way for subsequent years, subject to sections 112(3) and 113(4).
Step-by-step flow for applying Section 33
- 1
Is the asset a building, machinery, plant or furniture, or a qualifying intangible?
Intangibles must be know-how, patents, copyrights, trademarks, licences, franchises or similar rights acquired on or after 1 April 1998. Goodwill of a business or profession is excluded.
- No: No depreciation under Section 33.
- Yes: Go to the next step.
- 2
Is it owned (wholly or partly) and used for the business or profession?
- No: No depreciation.
- Partly used for business: Restrict to the fair proportionate part under Section 33(3)(b).
- Yes: Go to the next step.
- 3
Has the actual cost been allowed in full under Section 54?
- Yes: No depreciation under Section 33(3).
- No: Go to the next step.
- 4
Apply the prescribed rate to the block's written down value
Compute WDV under Section 41, using actual cost under Section 39.
- 5
Was the asset acquired this year and used for less than 180 days?
- Yes: Only 50% of the prescribed rate is allowed under Section 33(4).
- No: Full prescribed rate.
Practical checklist
Do
- Maintain an asset register with acquisition, put-to-use and disposal dates by depreciation block.
- Reconcile opening WDV, additions, disposals and any half-rate use-period restriction.
- Document eligibility separately before claiming additional depreciation.
Avoid
- Do not use accounting depreciation as the tax deduction without a statutory reconciliation.
- Do not ignore a disposal when updating the block's written-down value.
Illustrative example
Worked example: machine bought late in the year
Hypothetical facts (illustration only, not a real taxpayer): A trading company buys a machine for ₹10 lakh and puts it to use 60 days before the end of the tax year. Assume, for illustration only, that the prescribed rate for its block is 15% (check the Income-tax Rules for the actual rate).
Eligibility
The machine is tangible plant or machinery, owned and used for business, so it qualifies under Section 33(1)(a).
Actual cost
Actual cost is worked out under Section 39, for example net of GST input credit claimed and allowed, and excluding any cash payment over ₹10,000 in a day.
Half-rate rule
It was acquired during the tax year and used for fewer than 180 days, so Section 33(4) restricts depreciation to 50% of the prescribed rate: 7.5% of ₹10 lakh, i.e. ₹75,000 on the illustrative rate.
Outcome
- Depreciation for this year is ₹75,000 on the assumed rate; the remaining balance stays in the block's WDV for later years.
- If the machine had been put to use for 180 days or more, the full assumed rate would apply.
Glossary
- Block of assets
- Assets of the same prescribed class and depreciation rate grouped for the tax calculation.
- Written-down value
- The tax value of a depreciable asset or block after statutory cost and depreciation adjustments.
Frequently asked questions
What kinds of intangible assets qualify for depreciation under Section 33?
Know-how, patents, copyrights, trademarks, licences, franchises, or any other business or commercial right of a similar nature acquired on or after 1 April 1998 - but not goodwill of a business or profession.
What happens if a new asset is used for less than 180 days in the year it is acquired?
The depreciation deduction for that year is restricted to 50% of the prescribed rate for that block of assets.
How much additional depreciation can a manufacturing business claim on new machinery?
20% of the actual cost of new machinery or plant put to use during the tax year, or 10% (with the remaining 10% in the following year) if it is put to use for less than 180 days in the year of acquisition, subject to the other conditions in Section 33(8).
Can unabsorbed depreciation be carried forward?
Yes - under Section 33(11), if depreciation exceeds the available profits and gains of the tax year, the unabsorbed amount is added to the following year's depreciation deduction and can continue to be carried forward year after year, subject to sections 112(3) and 113(4).
Need help applying this provision to your situation?
Get your depreciation schedule reviewed by our tax audit teamLast updated 10 October 2026