A Section 148 notice is a formal notice from the income tax department to reopen and reassess a past year's income. It requires you to file a return for the relevant assessment year within the specified time. The notice can be issued within 3 years normally, or up to 10 years if escaped income exceeds Rs 50 lakh.
Section 148 Notice: Reassessment Time Limit and How to Reply
A Section 148 notice is the income tax department’s formal notice to reopen and reassess a past year’s income. It is issued after the mandatory Section 148A preliminary inquiry, and it requires you to either file a fresh return for the relevant assessment year or treats your previously filed return as the return for reassessment. The Finance Act 2021 completely restructured the reassessment framework — introducing the mandatory Section 148A pre-notice inquiry, tightening time limits, and requiring specific “information” (not just a vague belief) to justify reopening beyond 3 years. This guide covers how Section 148 works, the time limits, your obligations and rights, and how to reply effectively to protect your interests.
Section 148 Notice: Key Facts
- What it is: Formal notice to reopen a past assessment or process a return for an assessment year where income has allegedly escaped taxation
- Must follow: Section 148A mandatory inquiry — a Section 148 notice without prior Section 148A(d) order is procedurally defective
- Your obligation: File a return of income for the relevant AY within the time specified (or, if already filed, the existing return is deemed the return)
- Standard time limit: 3 years from end of relevant AY
- Extended time limit: 10 years from end of relevant AY, only where escaped income exceeds Rs 50 lakh and AO has defined “information”
- Senior approval: PCIT/CIT must approve notice before issue
- Reassessment completion: Must be completed within 12 months from end of financial year of Section 148 notice
What Is the Difference Between Section 148 and Section 148A Notices?
| Feature | Section 148A Notice | Section 148 Notice |
|---|---|---|
| Nature | Preliminary show cause / inquiry | Formal reassessment notice |
| Trigger | AO has information suggesting escaped income | Only after Section 148A(d) order passed |
| Your obligation | File reply within 7-30 days explaining the transaction; no return required | File return of income for relevant AY |
| Purpose | Pre-notice opportunity to prevent reassessment from being opened | Formally reopens assessment; triggers reassessment proceedings |
| Challengeable? | 148A(d) order can be challenged in High Court writ | Can be challenged (time limit, procedural defects) in High Court writ; on merits through CIT(A) appeal after assessment order |
What Are the Time Limits for Issuing a Section 148 Notice?
The Finance Act 2021 replaced the earlier 4-year and 6-year windows with cleaner 3-year and 10-year limits:
| Scenario | Time Limit | Conditions |
|---|---|---|
| Normal reassessment (any amount of escaped income) | 3 years from end of relevant AY | AO must have reason to believe; PCIT/CIT approval required; Section 148A process must be followed |
| Large escaped income (above Rs 50 lakh) | 10 years from end of relevant AY | Escaped income must exceed Rs 50 lakh; AO must have “information” as defined in Explanation 2 to Section 148; PCIT/CIT approval required |
| Search-triggered reassessment | 10 years (special provisions) | Section 153A/153C framework applies for search cases; separate time limits |
Immediately Challenge a Time-Barred Section 148 Notice
If you receive a Section 148 notice after the applicable time limit has expired (3 years for normal cases; 10 years for large escaped income), you should challenge it immediately by filing a writ petition before the High Court. Do NOT wait until the reassessment order is passed. Courts have held that a time-barred Section 148 notice is without jurisdiction and should be quashed. File the writ within 30-60 days of receiving the notice. Simultaneously, you may also file a protective return to avoid the AO making a Section 144 best judgment assessment while the writ is pending.
How to Reply to a Section 148 Reassessment Notice?
5-Step Process for Responding to a Section 148 Notice
- Verify procedural validity: Check that a Section 148A(b) notice was issued and a Section 148A(d) order was passed before this Section 148 notice. Check the time limit. If either is missing or violated, consult an advocate about a writ petition.
- File a return of income: File a return for the relevant AY within the time specified in the notice. Disclose all income, including the item the AO suspects has escaped assessment, with a detailed note explaining why it is correctly taxed or is not taxable. Filing a comprehensive, accurate return reduces the risk of the AO making ex parte additions.
- Respond to the AO’s questionnaire: After you file the return, the AO will issue a questionnaire about the specific transactions in question. Respond with complete, document-backed replies addressing each specific question.
- Object to scope expansion: The AO can examine only income related to the specific escaped assessment that triggered the reopening, and any other income that surfaces in the course of those proceedings. If the AO attempts to examine unrelated matters, object in writing and cite the Supreme Court’s ruling in CIT v. Sun Engineering Works.
- Appeal if needed: If the reassessment order still makes unjustified additions, file a CIT(A) appeal within 30 days of the reassessment order.
What Is the Scope of Reassessment Under Section 148?
One of the most significant legal protections in the reassessment framework is the limitation on the scope of what the AO can examine. The Supreme Court in CIT v. Sun Engineering Works P. Ltd. and numerous High Courts have held that in a Section 147 reassessment:
- The AO can examine and assess the specific income that formed the basis of the “reason to believe” or “information” that justified reopening
- The AO can also assess any other income that comes to their notice during the reassessment proceedings (this is the “also assess” language in Section 147)
- The AO cannot use the reassessment as a general second scrutiny to examine all aspects of the assessee’s financial affairs for that year
- Income that was examined and allowed (or not questioned) in the original Section 143(3) assessment cannot be disallowed in the reassessment on the basis of change of opinion
What Are the Most Common Questions About Section 148 Reassessment Notice?
What is a Section 148 notice and how is it different from Section 148A?
A Section 148 notice is the formal notice reopening a past assessment, requiring you to file a return. A Section 148A notice is the mandatory preliminary inquiry notice that must precede every Section 148 notice. The Section 148A notice asks you to explain why the AO believes income escaped assessment; after reviewing your reply, the AO passes an order deciding whether to formally reopen with a Section 148 notice. A Section 148 notice received without a prior Section 148A(d) order is procedurally defective.
What should I do when I receive a Section 148 notice?
First, verify whether the Section 148A procedure was followed and whether the notice is within the time limit. Then file a return of income for the relevant AY within the specified time. Respond to the subsequent questionnaire with complete, document-backed replies. If the notice is time-barred or procedurally defective, file a writ petition in the High Court immediately. Do not ignore the notice — non-response can result in a Section 144 best judgment assessment.
Can the income tax department issue a Section 148 notice after 3 years?
Yes, but only where the escaped income exceeds Rs 50 lakh AND the AO has specific “information” as defined in Explanation 2 to Section 148. In that case, the notice can be issued up to 10 years from the end of the relevant AY. A Section 148 notice issued after 3 years without satisfying these conditions is without jurisdiction and can be challenged in a High Court writ.
What is the scope of reassessment — can the AO examine everything?
No. The AO can examine the specific income that formed the basis of the reassessment trigger, plus any other income that surfaces in the course of those proceedings. The AO cannot use a Section 148 notice as a general second scrutiny of all aspects of that year’s return. If the AO tries to add income on grounds unrelated to the original reopening basis, object in writing and appeal the addition.
What is the time limit for completing a reassessment after Section 148 notice?
The reassessment must be completed within 12 months from the end of the financial year in which the Section 148 notice was issued. For a notice issued in November 2025 (FY 2025-26), the reassessment must be completed by 31 March 2027. If not completed within this window, the reassessment lapses.
For expert help on responding to a Section 148 notice or challenging a time-barred reassessment, contact the Tradeviser team. See also our guides on Section 148A preliminary inquiry, Section 147 reassessment, and the income tax notices hub.
CA Madhusmita Padal is a Practicing Chartered Accountant with firms based in Odisha and Chennai. She specializes in taxation, company law, and auditing. She is passionate about simplifying complex concepts and making knowledge accessible to all.