Depreciation under Income Tax Law

Understand depreciation under income tax law, meaning, calculation, block of assets and tax treatment under the Income Tax Act.

Introduction

Depreciation is one of the most important deductions available while computing income under the head Profits and Gains from Business or Profession (PGBP) under the Income Tax Act, 1961. Businesses use various assets such as machinery, buildings, furniture, computers, and vehicles to generate income. Over time, these assets lose value because of wear and tear, usage, technological obsolescence, passage of time, and other factors.

Recognising this gradual reduction in value, the Income Tax Act allows taxpayers to claim depreciation as a deduction while computing taxable business income. Depreciation ensures that the cost of business assets is allocated over their useful life rather than being deducted in a single year.

The concept of depreciation is important because it reduces taxable income, reflects economic reality, and promotes investment in productive assets.

Meaning of Depreciation

Depreciation refers to the reduction in value of an asset due to use, wear and tear, obsolescence, passage of time, or exhaustion.

In simple terms:

Depreciation is the gradual decline in the value of a business asset over time.

Examples:

• Machinery becoming old after continuous use
• Computers becoming technologically outdated
• Vehicles losing value due to usage

The Income Tax Act recognises this loss in value and allows a deduction.

Purpose of Depreciation

Depreciation serves several important objectives.

Recognition of Asset Wear and Tear

Business assets deteriorate over time.

Depreciation reflects this economic reality.

Fair Computation of Business Income

Without depreciation:

Taxable profits would appear artificially high.

Encouragement of Business Investment

Depreciation reduces tax burden and promotes investment in productive assets.

Allocation of Asset Cost

Instead of deducting the entire cost in one year, the cost is spread across the useful life of the asset.

Legal Basis of Depreciation

The Income Tax Act provides specific provisions for depreciation deduction.

Depreciation is allowed while computing income under:

Profits and Gains from Business or Profession (PGBP)

The deduction is available according to statutory rules and prescribed rates.

Tax depreciation may differ from accounting depreciation.

Essential Conditions for Claiming Depreciation

Certain conditions must generally be satisfied.

Ownership of Asset

The taxpayer should generally own the asset.

Ownership may be:

• Legal ownership
• Beneficial ownership in specified situations

Use for Business or Profession

The asset should be used for business or professional purposes.

Examples:

• Office building
• Machinery
• Business vehicle

Personal assets ordinarily do not qualify.

Asset Must Be Depreciable

The asset should belong to a category recognised for depreciation.

Examples:

• Buildings
• Machinery
• Plant
• Furniture
• Intangible assets in specified situations

Assets Eligible for Depreciation

Buildings

Business buildings and structures used for business purposes.

Examples:

• Factory building
• Office premises

Plant and Machinery

Machinery and equipment used in business operations.

Examples:

• Manufacturing machinery
• Industrial equipment

Furniture and Fittings

Examples:

• Office tables
• Chairs
• Cabinets

Vehicles

Business-use motor vehicles.

Examples:

• Delivery vans
• Commercial vehicles

Computers and Software

Computer systems and specified software used in business.

Intangible Assets

Certain intangible assets may qualify.

Examples:

• Patents
• Copyrights
• Trademarks
• Licences
• Franchises

Assets Not Eligible for Depreciation

Certain assets generally do not qualify.

Land

Land does not ordinarily depreciate through use.

Therefore:

Depreciation is not allowed on land.

Personal Assets

Assets used exclusively for personal purposes do not qualify.

Stock-in-Trade

Goods held for sale are not depreciable assets.

Concept of Block of Assets

One of the unique features of income tax depreciation is the concept of:

Block of Assets

Meaning of Block of Assets

A block of assets refers to a group of assets:

• Belonging to the same category, and
• Subject to the same depreciation rate

Examples:

• Computers block
• Furniture block
• Machinery block

Depreciation is calculated on the block rather than individual assets.

Importance of Block System

The block system:

• Simplifies depreciation computation
• Reduces administrative complexity
• Facilitates asset management

It is a distinctive feature of tax depreciation.

Written Down Value (WDV)

Meaning of WDV

Written Down Value means the value of an asset or block after reducing depreciation allowed in earlier years.

In simple terms:

WDV is the remaining tax value of an asset.

Formula:

WDV = Original Cost – Depreciation Allowed

Depreciation is generally calculated on WDV basis under income tax law.

Method of Depreciation under Income Tax Law

The Income Tax Act primarily follows:

Written Down Value (WDV) Method

Under this method:

Depreciation is calculated on the reduced value of the asset or block every year.

This differs from methods such as straight-line depreciation used in accounting.

Computation of Depreciation

The general process involves:

Step 1: Determine Opening WDV

Identify opening value of block of assets.

Step 2: Add Asset Acquisitions

Add cost of assets purchased during the year.

Step 3: Deduct Asset Sales

Reduce sale consideration of assets disposed of during the year.

Step 4: Calculate Closing Block Value

Determine eligible block value.

Step 5: Apply Prescribed Depreciation Rate

Depreciation is calculated using statutory rates.

The resulting amount becomes allowable deduction.

Additional Depreciation

In specified situations, certain businesses may claim:

Additional Depreciation

This benefit generally aims to:

• Encourage industrial expansion
• Promote investment in new machinery

Eligibility depends upon statutory conditions.

Depreciation on Intangible Assets

The Income Tax Act permits depreciation on certain intangible assets.

Examples include:

• Patents
• Trademarks
• Licences
• Copyrights
• Franchises

These assets provide business value despite lacking physical form.

Depreciation in Case of Partial Business Use

Where an asset is used partly for:

• Business purposes, and
• Personal purposes,

depreciation may generally be restricted to business-use portion.

The personal portion does not qualify.

Depreciation and Capital Expenditure

Depreciation is closely connected with capital expenditure.

Capital expenditure generally cannot be deducted immediately.

Instead:

The taxpayer may recover cost gradually through depreciation.

Thus:

Depreciation converts long-term asset cost into periodic tax deduction.

Difference Between Depreciation and Revenue Expenditure

Basis	Depreciation	Revenue Expenditure
Nature	Reduction in asset value	Operational expenditure
Asset Required	Yes	Not necessary
Deduction Basis	Statutory depreciation rate	Actual expenditure
Example	Machinery depreciation	Salary payment

Difference Between Accounting Depreciation and Tax Depreciation

Basis	Accounting Depreciation	Tax Depreciation
Purpose	Financial reporting	Tax computation
Method	Various methods possible	Primarily WDV method
Rates	Company policy or standards	Statutory rates
Objective	True financial position	Tax deduction

Thus:

Accounting depreciation and tax depreciation may differ significantly.

Importance of Depreciation

Depreciation is important because it:

• Reduces taxable income
• Recognises asset deterioration
• Encourages investment
• Ensures fair profit computation

It is one of the most significant deductions available to businesses.

Common Mistakes Regarding Depreciation

People often assume:

• Depreciation is available on all assets
• Land qualifies for depreciation
• Accounting depreciation and tax depreciation are identical

However:

Depreciation under the Income Tax Act is governed strictly by statutory provisions, asset categories, and prescribed rates.

Proper classification and computation are essential.

Conclusion

Depreciation under income tax law is a statutory deduction that recognises the reduction in value of business assets due to use, wear and tear, and obsolescence. The Income Tax Act allows depreciation on specified tangible and intangible assets through the block of assets system and the written down value method. Since depreciation significantly affects taxable business income and tax liability, understanding its principles, computation, and conditions remains essential for proper tax compliance and business planning.