Depreciation under Section 32 of the Income Tax Act lets businesses legally reduce taxable profit by writing off the declining value of assets each year, zero cash outflow, real tax saving.
| What | Details |
| Governing Section | Section 32, Income Tax Act |
| Method Permitted | Written Down Value (WDV) only – SLM not allowed except for power sector |
| Eligible Assets | Owned assets used for business (buildings, machinery, furniture, intangibles) |
| Non-Eligible Assets | Land, personal assets, goodwill acquired after April 2021 |
| Key Depreciation Rates | Computers: 40% / Motor car: 15% / Business building: 10% |
| Half-Rate Rule | Asset used under 180 days in acquisition year gets 50% of applicable rate |
| Additional Depreciation | 20% extra in acquisition year for new manufacturing/power plant machinery (Section 32(1)(iia)) |
| Asset Disposal | Sale price exceeding block WDV taxed as short-term capital gain |
| Carry Forward | Unabsorbed depreciation carries forward up to 8 years |
| Common Mistake | Depreciation is mandatory once an asset enters a recognised block – not optional |
Right block, right rate, WDV applied correctly, depreciation done properly reduces tax liability every year at no additional cost. Let’s understand it more in-depth.
Depreciation in income tax is the deduction for an asset’s gradual loss in value. Section 32 of the Income Tax Act governs it. Asset must be owned, used for business, and within a recognised block. Land never depreciates. Goodwill dropped off the eligible list after 2021.
What is depreciation in income tax simply put? A legal way to recover asset cost over its useful life while reducing taxable profit annually.
Why is depreciation provided? Without it, a business spending Rs. 10 lakhs on machinery would show that full amount as a cost in year one. Distorted profit, distorted tax.
Depreciation spreads that cost. Each year a slice of the asset’s value gets written off against income. Taxable profit falls. So does the tax.
A factory with heavy machinery, a fleet operator, a software firm with servers: all carry significant depreciating assets. Claiming depreciation as per income tax correctly separates a reasonable tax bill from a needlessly high one.
The Income Tax Act groups assets into blocks. Buildings, machinery, furniture, intangibles. Each block has its own income tax depreciation rates, computer: 40%, business building: 10%, and motor car: 15%.
Wrong block means wrong rate, either an under-claim or a compliance risk. Categorise correctly before calculating anything.
Which method of depreciation is approved by income tax act?
WDV only. Straight-line is barred except for power generation undertakings. Whatever the books show, tax follows WDV.
Tax depreciation and book depreciation are often different numbers. Tax follows block rates under the Income Tax Act. Books follow useful life estimates under Companies Act or Ind AS.
Track both separately. The gap creates a deferred tax position. Messy records here cause problems at assessment time.
There are three methods that exist in practice, though not all are permitted for income tax.
Equal deduction every year, and cost divided by useful life. Widely used in financial accounting under Companies Act. Under income tax, only power sector undertakings qualify. Most businesses cannot use it for tax.
The method the Income Tax Act mandates. Applied on the reduced value each year, not original cost. Rs. 1 lakh at 15% becomes Rs. 85,000 in year one, Rs. 72,250 in year two. The block closes when all assets in it are disposed of. This is depreciation as per income tax.
Not permitted under income tax. Used for assets where wear tracks usage more than time, mining equipment, oil rigs, heavy machinery. A higher output year means higher depreciation.
Worth understanding because some businesses run asset registers on this method and reconcile against WDV for tax filings.
Depreciation as per income tax reduces the profit on which tax is computed. Higher claim, lower income, lower tax.
A transport company with 20 trucks at 15% WDV trims taxable income every year. Zero cash outflow. Non-cash expense, real tax saving.
Watch the disposal side too. Sale price exceeding the block’s WDV gets taxed as a short-term capital gain. Timing asset sales around these matters.
Section 32 is the main provision. Owned assets used for business. Half-rate when an asset is used for fewer than 180 days in the year of acquisition.
Section 32(1)(iia) adds 20% extra depreciation in the acquisition year for new manufacturing or power generation plants and machinery. Some notified areas get 35%.
Section 43 defines actual cost and WDV. Section 50 governs computation on transfer. These are not optional readings for anyone filing accurate returns.
Manual tracking across multiple blocks, different acquisition dates, half-year rules, and additional depreciation provisions invites errors. A calculator automates WDV computation, applies the right income tax depreciation rates by block, and flags half-rate situations automatically.
For planning, it means knowing future depreciation availability before making capital expenditure decisions. Jainam Broking Limited helps clients model these scenarios before a purchase decision, not after.
Depreciation is optional. That’s wrong. Once an asset enters a recognised block, depreciation is computed regardless of whether it is claimed. Unabsorbed depreciation carries forward eight years.
Land depreciates but it does not, the structures on land do. The land itself never has.
Same method for tax and books. No. Books may use straight-line. Income tax follows WDV. Different numbers, both need tracking.
WDV means the asset eventually disappears from records. Also, wrong. The block stays open until disposal.
Depreciation in income tax is not a footnote. For asset-heavy businesses it is one of the biggest deductions on the table. Right block, right rate, WDV applied correctly. The numbers compound. Depreciation as per income tax, done properly, reduces liability every year at zero additional cost.
Reduces reported profit and asset book value. Shown as an expense on the income statement. On the balance sheet, accumulated depreciation offsets gross asset value.
Annually. Opening WDV of each block, adjusted for additions and disposals.
Yes. Full rate if used 180 or more days in the acquisition year. Under 180 days gets half the rate.
Land, personal assets not used for business, goodwill acquired after April 2021, assets not owned by the taxpayer.
Depreciation is non-cash. No money leaves the business. But it reduces taxable income, which reduces the actual tax paid. Real cash saving, no cash outflow.
Purchase invoices, asset register with acquisition dates and costs, proof of business use, block-wise WDV computation. Companies must disclose depreciation separately in audited financials.
Yes, and they usually do. Books under Companies Act may use straight-line. Tax follows WDV under Section 32. The difference creates a deferred tax position that needs reconciling in the accounts.
Good software maintains block-wise WDV automatically, applies correct income tax depreciation rates, flags half-year acquisitions, and generates the schedule needed for ITR filing. Spreadsheets work but introduce error risk across multiple blocks.
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