Receiving a notice under Section 148 of the Income Tax Act is one of the most stressful events for any taxpayer. It means the department wants to reopen your already-completed assessment. But reassessment is not unlimited — there are strict procedural safeguards, and understanding them can be your strongest defense.

The Section 148A Framework

Since the Finance Act 2021 amendments, the AO must follow a four-step process before issuing a Section 148 notice:

  1. Conduct preliminary inquiry with prior approval from the specified authority
  2. Issue a show-cause notice providing all information suggesting income escapement (7-30 days reply period)
  3. Consider the taxpayer's reply
  4. Pass a reasoned/speaking order deciding whether to proceed

Only after all four steps are completed can the formal Section 148 notice be issued. Any procedural shortcut is a ground for quashing.

Time Limits Under Section 149

  • 3 years from end of relevant Assessment Year — general default period
  • Up to 5 years — if escaped income is Rs 50 lakh or more AND supported by documentary evidence (assets, expenditures, book entries). Note: the IT Act 2025 has tightened this from the earlier 10-year window under the post-2021 amendments to the 1961 Act

Four Jurisdictional Grounds to Challenge

1. Invalid Notice Format: CBDT has prescribed specific formats for assessment and reassessment notices. Notices deviating from official formats have been quashed by ITAT in multiple cases.

2. Time-Barred Notices: The six-year limitation must be computed carefully, accounting for COVID extensions (March 2020 to June 2021) and the Supreme Court's Ashish Agarwal decision timeline.

3. JAO vs FAO Jurisdiction: The Bombay HC in Hexaware Technologies (May 2024) held that only Faceless Assessing Officers can issue Section 148 notices. The Delhi HC disagrees. This split remains unresolved — use it if you are in Bombay HC jurisdiction.

4. Change of Opinion: The AO cannot reopen assessment by merely reinterpreting facts already examined during original scrutiny. Demand proof of genuinely new information.

Practical Defense Steps

  • Stage 148A is critical: A weak reply here limits your options later. Invest time and evidence at the show-cause stage
  • Demand full material: Request complete disclosure of all information the AO relied upon — non-supply is a ground for judicial intervention
  • Reconcile AIS and TIS: Before filing returns, ensure your Annual Information Statement and Taxpayer Information Summary match your disclosures
  • Document high-value transactions: Capital gains, unsecured loans, and large cash transactions are the most common triggers for reassessment

Reassessment is a legitimate power — but it has boundaries. Knowing those boundaries is the difference between compliance and capitulation.