Expert filing of Form ITR-B for block assessment of undisclosed income under section 158BC / 158BD — the special return for search and requisition cases initiated on or after 1 September 2024. Consolidated block period assessment with 60% tax computation, seized material reconciliation, and professional representation before the Assessing Officer.
Discuss your search/seizure matter privately with CA Alok Kumar
Form ITR-B is the return prescribed for block assessment of undisclosed income. Unlike normal annual ITRs that cover one assessment year, ITR-B is a special return for a consolidated "block period" — meant for income that the law treats as undisclosed in consequence of search proceedings under section 132 or requisition under section 132A of the Income Tax Act.
It was notified by CBDT Notification No. 30/2025 dated 7 April 2025 under Rule 12AE. The return is filed in response to a notice under section 158BC (or section 158BC read with section 158BD for "other person" cases).
Critical: A revised ITR-B cannot be filed. Once submitted, it becomes the foundation of your block assessment. Professional review before filing is essential — a wrong admission can enlarge your tax, penalty, and litigation exposure significantly.
The block assessment framework was reintroduced through the Finance (No. 2) Act, 2024 because the earlier search assessment model under reassessment provisions was leading to staggered year-wise proceedings, prolonged litigation, lack of coordinated investigation, and extended uncertainty for both taxpayers and the Department.
The block period is much wider than an ordinary annual assessment — it can cover up to 6+ years in a single consolidated return
The legal triggers that necessitate ITR-B filing under Chapter XIV-B
When the Income Tax Department conducts a search operation under section 132 on or after 1 September 2024 at your premises — residential, business, or any other location under authorisation.
₹25,000 onwardsWhere books of account, documents, or assets are requisitioned by the Department under section 132A, the same block assessment mechanism applies and ITR-B filing becomes mandatory.
₹25,000 onwardsBlock assessment is not limited to the searched person. If material found during search relates to another person, proceedings may be initiated under section 158BC read with section 158BD.
₹20,000 onwardsReplaces scattered year-wise reassessments with a single, consolidated block assessment — reducing multiplicity of proceedings and enabling coordinated investigation of search findings.
Included with filingOnce block assessment applies, all pending assessments or reassessments for years within the block period abate and merge into the block assessment — making ITR-B the central compliance document.
Legal advisory includedSection 158BB framework determines total undisclosed income for the full block period — distinguishing between disclosed income (assessed, returned, recorded in books) and undisclosed income.
₹15,000 onwardsUnderstanding the financial consequences — from tax rates to penalties and interest
Under section 158BA(7) read with section 113, plus applicable surcharge
No interest under sections 234A, 234B, 234C on undisclosed income by virtue of section 158BF
Under section 158BFA — interest at 5% per month or part thereof for delayed filing
Penalty equal to 50% of tax on excess undisclosed income over returned amount in specified cases
| Parameter | Regular ITR (ITR-1 to ITR-7) | Form ITR-B |
|---|---|---|
| Purpose | Voluntary disclosure of annual income | Notice-driven return for undisclosed income of block period |
| Coverage Period | One Assessment Year | Block period — 6 previous years + broken period |
| Filing Trigger | Voluntary / statutory due date | Notice under section 158BC / 158BD |
| Tax Rate | Slab rates / 30% / special rates | Flat 60% on undisclosed income |
| Revision | Revised return allowed u/s 139(5) | Revised return NOT allowed |
| Due Date | 31 July / 31 October / 30 November | As per notice — max 60 days (+ 30 days extension) |
| Interest on Late Filing | 234A — 1% per month | 158BFA — 5% per month |
| 234A/B/C Interest | Applicable | Not applicable on undisclosed income (section 158BF) |
| Verification | DSC / EVC / Aadhaar OTP | DSC or EVC (DSC mandatory for companies, audit cases) |
| Income Type | All disclosed income | Only undisclosed income of block period |
Section 158B gives an inclusive meaning — exposure extends far beyond cash or jewellery found during search
Unaccounted cash found during search, unexplained cash deposits, and cash movements not reflected in books of account
Gold, silver, precious stones, and jewellery found in excess of declared wealth or not matching documented sources
Cryptocurrency, NFTs, and other VDAs not disclosed in regular returns or not matching declared holdings
Undisclosed foreign bank accounts, properties, investments, and assets held outside India
Income revealed from parallel books, loose sheets, digital evidence, accommodation entries, and unrecorded transactions
Incorrect claims of expenses, exemptions, deductions, or allowances that the Department treats as undisclosed income
Properties, shares, mutual funds, and other investments not matching declared income or sources
Business turnover or receipts not recorded in regular books — evidenced from seized records, bank trails, or third-party statements
Transactions routed through shell entities, benami arrangements, or circular trading patterns revealed during search
From receiving the section 158BC notice to online submission on the e-filing portal
Check section cited (158BC or 158BC r.w.s. 158BD), DIN/document number, date of notice, due date, block period covered, and whether you are the searched person or "other person".
Derive the correct block period from the date of first search authorisation/requisition and date of last authorisation. A wrong understanding here distorts the entire return.
Gather details of all returns already filed for years in the block period. The law distinguishes between assessed income, returned income, and income recorded in books before search.
Classify every item from seized papers, digital data, bank trails, property records, demat statements, and cash movements into: already disclosed, reconcilable, genuinely undisclosed, or legally contestable.
Break up undisclosed income under prescribed heads: Salary, House Property, Business/Profession, Capital Gains, and Income from Other Sources as required by the ITR-B form.
Disclose assets such as cash, bullion, jewellery, digital assets, foreign assets wherever relevant to the undisclosed income computation as required by the form schedules.
Compute TDS/TCS credit information for AYs in the block period, along with self-assessment tax and advance tax payments. Fill schedules for tax credits and payments.
Login → e-Proceedings → Submit to notice u/s 158BC or 158BC r.w.s. 158BD → select Form – Block ITR. Fill all required details and submit using DSC or EVC.
Companies, political parties, and persons liable to audit u/s 44AB must verify through DSC. Others may use DSC or EVC. Ensure correct verification to avoid treated-as-not-filed situations.
Maintain complete paper-book: notice copy, seized material references, reconciliations, prior ITR acknowledgements, computation notes, legal submissions on disputed issues — for scrutiny and hearing.
Use these tools for quick estimates — consult CA Alok Kumar for final computation
Enter search/requisition dates to calculate your block period
Calculate tax liability at 60% on undisclosed income
Calculate interest under section 158BFA for delayed ITR-B filing
Track your ITR-B filing deadline based on notice date
Comprehensive checklist for preparing your block assessment return
End-to-end professional support — from notice analysis to block assessment representation
Complete preparation and online filing of Form ITR-B including undisclosed income computation, head-wise break-up, TDS/TCS credit, tax computation, and portal submission with DSC/EVC verification.
₹25,000 onwardsDetailed analysis of the block assessment notice, legal scrutiny of jurisdiction and time-bar issues, and strategic response preparation with supporting documentation and legal arguments.
₹15,000 onwardsForensic reconciliation of all seized materials — books, papers, digital data, bank trails, property records — with disclosed records. Classification into disclosed, reconcilable, undisclosed, and contestable categories.
₹20,000 onwardsProfessional representation before the Assessing Officer during block assessment proceedings. Handling of hearings, submissions, cross-examination of evidence, and section 158BB computation disputes.
₹30,000 onwardsAppeal filing against block assessment orders before CIT(A), ITAT, and higher courts. Stay of demand applications, legal submissions on disputed additions, and appellate representation.
₹20,000 onwardsSpecialised advisory and filing for persons not directly searched but receiving notice under section 158BD. Analysis of nexus between seized material and the "other person" — strategic defence preparation.
₹20,000 onwardsPitfalls that taxpayers and professionals frequently encounter in block assessment matters
Critical points every taxpayer and professional must know about block assessment
ITR-B is a special return for block assessment in search and requisition matters under Chapter XIV-B — entirely different from ITR-1 to ITR-7.
The regime applies for searches/requisitions initiated on or after 1 September 2024, reintroduced through Finance (No. 2) Act, 2024.
The law aims for early finalisation, coordinated investigation, and reduction of multiple scattered proceedings.
Delay or improper filing can also trigger interest and penalty consequences under section 158BFA.
Six preceding years plus the broken period up to the last authorisation — much wider than a normal annual assessment.
Section 158BB framework distinguishes disclosed income from undisclosed income — prior filing history is critical.
ITR-B should not be filed casually or in haste. Once filed, it becomes the foundation of the block assessment.
For searches initiated before 1 April 2026, proceedings continue under Income-tax Act, 1961 by virtue of section 536(2)(v) of the new Act.
The real work is legal analysis, reconciliation of seized material, and careful classification of income — before upload.
A wrong admission in ITR-B can materially increase tax, interest, penalty, and litigation exposure for years to come.
Detailed answers to the most common questions about Form ITR-B and block assessment
ITR-B filing and block assessment advisory services across Delhi, India, and for NRIs worldwide
Don't file ITR-B without professional guidance. A wrong admission can become the foundation of your block assessment. Consult CA Alok Kumar — 55+ years of firm experience in handling search & seizure matters.