Tax Audit Depreciation Working: Reconciling Asset Blocks with the Fixed Asset Register
Book depreciation and tax depreciation need connected but separate workings. Learn how to organise asset-block data for the tax-audit review without importing book net values into tax WDV.
AI Summary
Scope: FY 2025-26 / AY 2026-27 under the Income-tax Act, 1961 and applicable Income-tax Rules, 1962; do not reuse section/form references unchanged for Tax Year 2026-27. Verification date: 11 October 2026.
Use asset records as evidence, not as the tax answer
A fixed asset register contains valuable invoice and disposal information. Its book depreciation, useful life and closing net book value do not automatically determine the income-tax deduction. For tax audit, the preparer needs a block-wise working using the applicable tax rules.
Form 3CD Clause 18 requests depreciation particulars for the relevant asset or block. Prepare this working independently, then reconcile the shared source data with the book register. This makes additions and disposals traceable without pretending both depreciation figures should match.
Establish the opening tax position
Obtain the previous-year filed return, depreciation schedule and any assessment adjustments that affect the current opening. Check whether the opening WDV is based on an approved tax record or merely copied from a book schedule.
Keep a note of unresolved prior-year issues. A change to opening WDV should have a documented basis. Do not replace it with the ledger's closing asset value simply because that number is easier to locate.
Review additions item by item
Capture asset description, invoice date, cost components, ownership facts, tax block, applicable rate and put-to-use evidence. Separate additions requiring different treatment. Review recoverable taxes, capitalised costs and any special conditions against the actual provision before finalising tax cost.
The date on an invoice is not necessarily the date of use. Obtain installation, commissioning, usage or other relevant evidence. The less-than-180-days treatment for qualifying additions is a common source of errors, especially where a full-year rate is applied to every purchase.
A simplified normal-depreciation example
Assume a continuing block has opening tax WDV of ₹10 lakh, qualifying full-rate additions of ₹2 lakh and qualifying less-than-180-day additions of ₹1 lakh. There are no disposals. Assume a verified normal rate of 15% for this illustrative block and no additional depreciation or other adjustments.
| Component | Basis | Depreciation |
|---|---|---|
| Opening WDV | ₹10,00,000 × 15% | ₹1,50,000 |
| Full-rate additions | ₹2,00,000 × 15% | ₹30,000 |
| Half-rate additions | ₹1,00,000 × 7.5% | ₹7,500 |
| Total | ₹1,87,500 |
Illustrative closing tax WDV is ₹13,00,000 − ₹1,87,500 = ₹11,12,500. The assumed rate and conditions must be verified for the actual asset. This example does not address disposals, discontinued blocks or special depreciation provisions.
Disposals need their own assessment
Record sale proceeds and other relevant amounts with the asset/block reference. Inspect whether the block continues and whether special computation consequences arise. A disposal's book gain or loss is not a substitute for the tax calculation.
Check for scrapped, exchanged and insurance-settled assets as well as ordinary sales. They may be missed if the review searches only for invoices carrying the words “sale of fixed asset”.
Final tax-audit controls
- Agree opening WDV to approved tax records.
- Reconcile acquisition costs and disposals with the book register, explaining differences.
- Check rates, dates and eligibility conditions.
- Reperform the calculation and agree it to Clause 18 and the return.
- Keep book and tax depreciation separate in the tax-computation bridge.
If financials are prepared in assureOffice, use the reviewed book PPE figures for the statements and the approved tax-block working for income-tax purposes. The connection is common evidence, not an expectation of identical depreciation.
Preserve the book-to-tax asset link
Retain an asset-to-block mapping with invoice reference, book asset ID, relevant cost adjustments, acquisition date and put-to-use evidence. This allows a reviewer to trace an amount from the financials register into the tax calculation without assuming that accounting classes and tax blocks are identical.
Inspect assets added close to year-end more closely. The invoice date, delivery date and actual business use may differ. Record the factual basis for the chosen treatment and distinguish an unsupported date from a confirmed one. A formula can apply the half-rate rule consistently only after the relevant dates and eligibility have been established.
Related articles
- Fixed Asset Register Reconciliation: Matching PPE, Depreciation and the General Ledger
- Brought-forward Losses and Unabsorbed Depreciation: Building the ITR Working
- ITR-6 Preparation Checklist: Documents and Workings to Collect First