Additional depreciation under Section 32(1)(iia) of the Income Tax Act (ITA) allows eligible businesses to claim an extra 20% deduction on the actual cost of new plant and machinery, over and above normal depreciation under Section 32, reducing taxable income in the year of purchase and improving cash flow.
It is a targeted tax incentive designed to reward capital investment and support business expansion through faster tax relief on productive assets.
Who can claim additional depreciation?
Additional depreciation is not available to all businesses. It applies only to:
- Businesses engaged in the manufacture or production of goods or articles (including certain processing activities, depending on judicial interpretation).
- Businesses engaged in the generation, transmission or distribution of power.
Trading companies, service businesses and professionals do not qualify, even if they purchase plants and machinery for their operations.
Which assets qualify for additional depreciation?
The asset must meet all of the following criteria:
- It must be plant or machinery (as interpreted under tax law, generally excluding buildings and furniture).
- It must be new; second-hand or previously used assets are not eligible.
- It must not have been used in India before acquisition (however, machinery used abroad but not previously in India may qualify if imported).
- It must not be an office appliance or road transport vehicle, both of which are specifically excluded.
- It must not be an asset whose full cost was already allowed as a deduction in an earlier year (for example, under Section 35AD).
Note: Computers and similar equipment may qualify only if they are directly used in the manufacturing or production process, and not merely for office or administrative purposes.
What is the half-year rule in additional depreciation?
If new plant or machinery is put to use for fewer than 180 days in the year of acquisition, additional depreciation is restricted to 50% of the normal 20% entitlement, i.e., 10% instead of 20%. The remaining 10% is available in the immediately following financial year (FY).
For example, a manufacturer acquires eligible machinery in February 2024 and puts it to use in March 2024. Since it is used for fewer than 180 days in FY 2023-24, only 10% additional depreciation is available in that year. The remaining 10% is claimed in FY 2024-25.
How do normal and additional depreciation work together?
Normal depreciation is calculated on the asset's written-down value (WDV). Additional depreciation is calculated on the actual cost, not the WDV and is claimed only once. After it has been fully claimed, the asset continues to be depreciated on its WDV at the normal rate in subsequent years.
What are the common errors made when claiming additional depreciation?
Businesses often lose eligible tax benefits due to avoidable mistakes in classification, timing and cost computation when claiming additional depreciation. Here is what commonly goes wrong:
- Claiming on ineligible assets: Vehicles, computers and office equipment do not qualify. Only plants and machinery directly used in manufacturing or production are eligible.
- Ignoring the 180-day rule: Acquiring an asset after October and claiming the full 20% is a frequent error. Unless the asset is used for at least 180 days in that FY, the deduction is limited to 10%.
- Claiming on used assets: Purchasing machinery from another business does not attract additional depreciation, even if the asset is new to your operations.
- Incorrect actual cost calculation: Under Section 43(1), any subsidy, grant or reimbursement received for acquiring the asset must be deducted from the actual cost before applying the 20% rate.
How does software support providing depreciation tracking?
Accounting software registers fixed assets with the acquisition date, the cost and the depreciation rate and automatically computes both normal and additional depreciation.
For companies with multiple asset purchases during a financial year, it is important to track days-in-use at the individual asset level to ensure proper application of the 180-day rule and minimise the risk of year-end errors.
Conclusion
Additional depreciation is a useful tax deduction, but it is not automatic or unconditional. Eligibility depends on the nature of the business, the type of asset and when the asset is put to use. Claiming it incorrectly on ineligible assets, in the wrong year or at the wrong rate can lead to disallowance and interest on understated tax.
Understanding the rules before acquiring an asset is far more important than correcting mistakes later. When depreciation is planned and tracked correctly, it improves tax efficiency without compliance risk.
This is where TallyPrime helps businesses in practice by supporting accurate fixed asset tracking and automating the calculation of normal and additional depreciation, ensuring it is correctly reflected in the books of account.
