Block of Assets Depreciation: WDV, Additions and Sale
Reviewed by CA Nikhil Gupta · Last reviewed 5 August 2026
Tax depreciation is calculated on a block of assets sharing class and rate, not separately on each asset.
Opening WDV plus eligible additions minus sale proceeds forms the block base, subject to use and half-year rules.
Legal or Computational Framework
Governing rule
Section 33 of the 2025 Act covers tangible and specified intangible assets but excludes goodwill. A block can produce short-term capital gain when consideration exceeds the block value.
Correct calculation method
Map each asset to the prescribed block; reconcile opening WDV; add actual cost; subtract transfer consideration; apply rate and half-year restriction; test block cessation.
Step-by-step workflow
- Map each asset to the prescribed block.
- reconcile opening WDV.
- add actual cost.
- subtract transfer consideration.
- apply rate and half-year restriction.
- test block cessation.
Worked example
Opening plant block ₹20 lakh, additions ₹8 lakh and sale proceeds ₹5 lakh leave ₹23 lakh before depreciation, subject to the period-of-use split.
The example is an illustration, not a substitute for the taxpayer's facts. A change in status, period, payment mode, document, city, asset, relationship or scheme can change the result.
Why generic pages get this wrong
Search pages often state a rate or limit without identifying the governing base. The calculation must distinguish gross receipt from taxable profit, tax from TDS, a deduction from an exemption, salary from business income, and an accounting entry from the tax treatment.
Decision matrix
| Decision point | Required treatment |
|---|---|
| Legal year | Use the Act, rules and notification effective for the income or transaction period |
| Taxpayer category | Confirm residence, age, entity, employee/business status and regime |
| Calculation base | Use the statutory definition rather than CTC, net bank receipt or accounting label |
| Ceiling or rate | Apply actual-amount, percentage, shared, lifetime and gross-income limits in sequence |
| Documentation | Link every input to an invoice, statement, contract, certificate or official record |
| Final output | Show tax, surcharge, cess, interest and TDS/TCS credits separately |
Entity and topical coverage
This page is written around the entities and concepts search engines expect for the topic: business deduction, depreciation, section 33, section 37, cash payment. They are used only where relevant and are connected to the live calculator and knowledge hub rather than repeated mechanically.
Use the ITR Form Selector — AY 2026–27 to work through the related inputs before acting.
What Generic Pages Miss
- Using accounting label as tax treatment.
- Claiming book depreciation.
- Missing actual-payment rule.
- Using cash without Rule 6DD review.
- Failing to preserve cost evidence.
Practical Documentation Checklist
- Ledger and vouchers
- Bank/payment evidence
- Asset register
- Tax-adjustment schedule
- Statutory due-date file
- Management approval
For the complete rules on this topic, see the core guide: Business Income Tax Calculator India 2026: Profit-to-Tax Workflow.
See the broader Income-tax Act 2025 study guide hub for related rules and calculators on this topic.
Finin2min Summary
Tax depreciation is calculated on a block of assets sharing class and rate, not separately on each asset. Opening WDV plus eligible additions minus sale proceeds forms the block base, subject to use and half-year rules.
Finin2min rule: establish eligibility, calculate transparently, and preserve an audit trail.
Frequently Asked Questions
Source and review trail
Use the current official instrument, portal or regulator publication before acting. This panel separates the category authority from page-specific references.
- Primary category
- Income Tax
- Official starting point
- www.incometax.gov.in
Page source links
- Income Tax Department — Section 33, depreciation under the 2025 Act
- Income Tax Department — Section 37, deductions on actual payment
- Income Tax Department — Section 112, business loss carry-forward
- Income Tax Department — Various deductions under the Income-tax Act
- Income Tax Department — Income Tax Returns FAQs under the 2025 Act
- Income-tax Act, 2025 and Income-tax Rules, 2026 official hub
Primary sources & related provisions
Statutory provisions referenced in this guide: