Section 148 Reassessment Notice: What to Check Before Responding

Reassessment notices require careful handling because the law has changed significantly in recent years. A reassessment notice is not the same as a routine query. It usually indicates that the department proposes to assess or reassess income believed to have escaped assessment.

For assistance, see Tax Notices, Scrutiny, Assessments & Appeals.

First check which law applies

As of July 2026, reassessment must not be described under one universal section-number framework.

• For assessment years/tax years beginning before 1 April 2026, including AY 2026-27 and earlier, reassessment proceedings are governed by the Income-tax Act, 1961. This includes legacy/pending and fresh proceedings for those earlier years, subject to limitation and the saving provisions.
• For Tax Year 2026-27 and later tax years, the Income Tax Act, 2025 framework applies. Under the new Act, the reopening notice is under Section 280, the usual show-cause stage is under Section 281(1), and the reasoned order stage is under Section 281(3), subject to exceptions provided in the new law.
• Pending reassessment proceedings under Sections 147/148/148A of the Income-tax Act, 1961 as on 1 April 2026 continue under the 1961 Act framework.

Therefore, a notice mentioning Section 148/148A should be reviewed as a legacy/pre-1-April-2026 tax-year matter unless the actual communication and applicable law say otherwise.

What Section 148 means in legacy proceedings

Under the Income-tax Act, 1961, Section 148 is used for issuing notice where income is believed to have escaped assessment. In many cases under that framework, a prior opportunity under Section 148A may be involved before notice under Section 148, subject to exceptions and transitional/period-specific rules.

Because reassessment provisions have been amended and transitioned into the Income Tax Act, 2025 for later tax years, no article should give one universal limitation period, section comparison or response format.

What to check immediately

Check:

• assessment year;
• notice date and DIN;
• whether any Section 148A notice/order exists;
• information or material relied upon;
• response deadline;
• whether return filing is required;
• whether the case relates to the Income-tax Act, 1961 or the Income Tax Act, 2025 framework;
• whether limitation/time-bar issues may arise.

Common reasons

Reassessment may involve:

• income not reported in ITR;
• high-value transactions;
• property sale or purchase;
• cash deposits;
• foreign assets/income;
• mismatch between AIS/Form 26AS and return;
• bogus purchase/sale allegations;
• accommodation entry information;
• capital gains or business receipts not fully explained.

Notice, information and order stages

In many legacy/pending reassessment matters, the taxpayer should distinguish:

Practical response workflow

1. Authenticate the notice.
2. Download every attachment.
3. Identify the exact alleged escaped income.
4. Reconcile AIS/Form 26AS, bank, books, property and investment records.
5. Review legal validity, limitation and procedural compliance.
6. Prepare a factual and legal response.
7. Preserve proof of submission.
8. Track subsequent notices and order.

Example

A taxpayer receives reassessment communication for a property sale. The response may need purchase deed, sale deed, cost records, improvement evidence, capital-gain computation, exemption documents and reconciliation with AIS. If the transaction was already disclosed, the reply should clearly point to the ITR schedule and evidence.

Appeal options

If reassessment results in an adverse order, appeal or other remedies may be available, depending on the order, limitation and facts. Rectification is not a substitute for appeal where the issue is debatable.

Related reading: Income Tax Demand Notice: Agree, Disagree, Rectification or Appeal?

Official references

• Reassessment Proceedings FAQs, Income Tax Department
• Income Tax Act, 2025 transition FAQs, Income Tax Department
• Income Tax e-Proceedings User Manual
• Authenticate Notice/Order issued by ITD
• Income-tax Act resources, Income Tax Department

This article is reviewed in July 2026. Reassessment law is highly fact-specific and should be reviewed against the exact assessment year and communication.