6 Types of Income Tax Assessment Under the Income Tax Act 2026
Reviewed by: Fibe Research Team
- Updated on: 26 Aug 2026
Every taxpayer who is required to pay income tax or file an Income Tax Return (ITR) must comply with the applicable tax rules. After a return is filed, the Income Tax Department may process or examine the details to determine the correct income, deductions, tax liability or refund. This process is broadly known as income tax assessment.
From 1 April 2026, the Income-tax Act, 2025 replaced the Income-tax Act, 1961. It also replaced the earlier concepts of “previous year” and “assessment year” with the simpler concept of a tax year for Tax Year 2026–27 onward. However, returns and proceedings relating to FY 2025–26/Assessment Year 2026–27 and earlier years continue to be governed by the Income-tax Act, 1961 under the transitional provisions.
Understanding the different types of assessment in income tax can help you respond correctly if your return is processed, selected for scrutiny, reopened or examined following a search.
Read on to understand the procedure of assessment in income tax, the role of the Assessing Officer and the major assessment types applicable in 2026.
Table of Contents
Meaning of Income Tax Assessment
An income tax assessment is the process through which the Income Tax Department processes, examines or determines a taxpayer’s income, loss, tax payable or refund based on the return and other available information.
Under the new Income-tax Act, 2025, a person liable to pay tax or another sum under the Act, or a person in respect of whom specified tax proceedings are undertaken, is known as an assessee.
Under the earlier Income-tax Act, 1961, the term “assessee” was defined under Section 2(7). Under the Income-tax Act, 2025, which applies to Tax Year 2026–27 onward, the corresponding definition is contained in Section 2(11).
An assessee can include:
- An individual
- A company
- A firm
- A Hindu Undivided Family
- An Association of Persons
- Another person liable to tax
- A person treated as an assessee or assessee in default under the law
What Does “Whether Assessed to Tax” Mean?
If a form asks “whether assessed to tax”, the meaning generally relates to whether the person has previously come within the income-tax assessment or compliance framework.
Being assessed to tax does not necessarily mean that additional tax was ultimately payable. An assessment may also result in acceptance of the returned income or a refund.
Who Is an Assessing Officer?
An Assessing Officer (AO) is an authorised income-tax official responsible for exercising assessment-related powers within the jurisdiction assigned to them.
Under the Income-tax Act, 2025, the definition is contained in Section 2(12). Depending on the assigned jurisdiction and powers, an Assessing Officer can include an:
- Assistant Commissioner
- Deputy Commissioner
- Assistant Director
- Deputy Director
- Income-tax Officer
- Additional Commissioner
- Joint Commissioner
- Other specified authorised officer
An Assessing Officer may perform functions such as:
- Examining tax returns
- Issuing notices
- Asking for supporting documents or information
- Conducting scrutiny proceedings
- Determining taxable income or loss
- Reassessing escaped income
- Passing applicable assessment orders
Many assessment proceedings are now conducted electronically through the faceless-assessment framework. The Income Tax Department has confirmed that the existing faceless assessment system continues under the Income-tax Act, 2025.
Types of Income Tax Assessment Under the Income Tax Act
For 2026, it is useful to distinguish between the old section numbers applicable to earlier assessment years and the corresponding framework under the new Income-tax Act, 2025.
| Type of Assessment | Income-tax Act, 2025 | Earlier Income-tax Act, 1961 |
|---|---|---|
| Self-Assessment | Section 266 | Section 140A |
| Summary Assessment | Section 270(1) | Section 143(1) |
| Scrutiny/Regular Assessment | Section 270(8) & 270(10) | Sections 143(2) & 143(3) |
| Income Escaping Assessment/Reassessment | Sections 279–286 | Sections 147–151 |
| Best Judgment Assessment | Section 271 | Section 144 |
| Search/Block Assessment | Sections 294–296 | Earlier search/block-assessment provisions |
| Protective Assessment | Judicially recognised; no specific section | Judicially recognised; no specific section |
1. Self-Assessment – Section 266
Self-assessment is the taxpayer’s own calculation of income and tax liability before filing the return.
You generally calculate:
- Total taxable income
- Applicable income tax
- Surcharge and cess, where applicable
- Interest or fees, where applicable
You then reduce eligible amounts already paid or credited, such as:
- TDS
- TCS
- Advance tax
- Eligible tax credits or reliefs
If a balance remains payable, it must generally be paid before furnishing the return.
Under the Income-tax Act, 2025, Section 266 governs self-assessment. It requires an assessee to pay the applicable tax, interest and fee before furnishing the relevant return where an amount remains payable.
For earlier years governed by the Income-tax Act, 1961, the corresponding provision is Section 140A.
2. Summary Assessment – Section 270(1)
A summary assessment is primarily an automated processing of the income-tax return.
The system may check issues such as:
- Arithmetical errors
- Incorrect claims apparent from the return
- Inconsistencies within the return
- Applicable tax payments
- TDS and TCS credits
- Tax payable or refund due
Before certain adjustments are made, the assessee must be informed and given an opportunity to respond.
An intimation is then issued showing:
- Tax payable
- Refund due
- Adjustments made, if any
Under the Income-tax Act, 2025, this return-processing mechanism forms part of Section 270(1).
No intimation under this processing provision can generally be sent after nine months from the end of the financial year in which the return was filed.
For earlier assessment years, the corresponding provision is Section 143(1) of the Income-tax Act, 1961.
3. Scrutiny Assessment – Section 270
A scrutiny assessment involves a more detailed examination of the return.
It may be undertaken to ensure that the taxpayer has not:
- Understated income
- Computed an excessive loss
- Underpaid tax
- Claimed deductions or exemptions incorrectly
Under the Income-tax Act, 2025, the Assessing Officer can issue a scrutiny notice under Section 270(8) where a return has been furnished and further examination is considered necessary.
The taxpayer may then be asked to provide documents or evidence supporting the return.
These may include:
- Bank statements
- Books of account
- Investment records
- Income documents
- Expense records
- Deduction-related evidence
- Other supporting information
A scrutiny notice under Section 270(8) generally cannot be served after three months from the end of the financial year in which the return was furnished.
After considering the evidence and other relevant material, the Assessing Officer can pass an assessment order under Section 270(10) determining the total income or loss and the tax payable or refund due.
For earlier years, these functions broadly correspond to Sections 143(2) and 143(3) of the Income-tax Act, 1961.
Regular Assessment: The earlier draft treated regular assessment as a separate assessment type. It substantially overlaps with scrutiny assessment, so it is included within this section instead of being repeated separately.
4. Income Escaping Assessment or Reassessment – Section 279
An income escaping assessment applies when the Income Tax Department has information suggesting that income chargeable to tax has escaped assessment.
Under the Income-tax Act, 2025:
- Reassessment is undertaken under Section 279
- The reassessment notice is issued under Section 280
- The pre-notice procedure is generally governed by Section 281
Before issuing a reassessment notice, the Assessing Officer generally needs to:
- Have information suggesting that income has escaped assessment
- Give the assessee an opportunity to respond through a show-cause notice
- Consider the response
- Pass a reasoned decision, with the required approval
- Issue the reassessment notice if the case is considered fit for reopening
Income may be considered to have escaped assessment in situations involving information such as:
- Undisclosed income
- Incorrect or excessive claims
- Information identified under the Department’s risk-management strategy
- Audit objections
- Information received from foreign jurisdictions
- Court or Tribunal findings
- Information obtained during specified surveys
Time Limit for Reopening
The earlier proposed wording referring to three years and ₹1 lakh should not be used for the current 2026 law.
Under Section 282 of the Income-tax Act, 2025, a notice under Section 280 can generally be issued:
- Within 4 years and 3 months from the end of the relevant tax year
- Between 4 years and 3 months and 6 years and 3 months only where the escaped income is or is likely to be ₹50 lakh or more, subject to the specified evidence conditions
A reassessment notice generally cannot be issued within one year from the end of the relevant tax year.
For tax periods beginning before 1 April 2026, the older provisions under Sections 147–151 of the Income-tax Act, 1961 continue to apply.
5. Best Judgment Assessment – Section 271
A Best Judgment Assessment may arise when a taxpayer does not fulfil certain statutory requirements.
For example, it may apply where a person:
- Fails to furnish the required return
- Fails to comply with an information or assessment notice
- Does not comply with a direction relating to a special audit or valuation
- Files a return but fails to comply with a scrutiny notice
In such circumstances, the Assessing Officer can use the information and material available to determine the assessee’s income or loss to the best of their judgment.
The taxpayer is ordinarily given an opportunity to be heard before such an assessment is completed.
Under the Income-tax Act, 2025, Best Judgment Assessment is governed by Section 271.
For earlier assessment years, the corresponding provision is Section 144 of the Income-tax Act, 1961.
6. Assessment in Case of Search – Block Assessment Under Section 294
The requested Section 153A reference relates to an older search-assessment framework and should not be presented as the current provision for Tax Year 2026–27 onward.
Under the Income-tax Act, 2025, assessment following an eligible search or requisition is dealt with through the block-assessment framework, including Sections 294–296.
A search may involve examination of undisclosed income detected through:
- Seized documents
- Books of account
- Money
- Bullion or jewellery
- Virtual digital assets
- Other assets or information obtained during the search
The applicable block period and undisclosed income are assessed under the special search-assessment framework.
The current time limit under Section 296 generally requires a block assessment order under Section 294 to be completed within 18 months from the end of the quarter in which the search was initiated or requisition was made, subject to applicable extensions and exclusions.
For searches and proceedings relating to periods governed by the repealed Income-tax Act, 1961, the applicable older search provisions continue to operate under the transitional rules.
Protective Assessment
A Protective Assessment is different from the statutory assessment types discussed above.
There is no separate section in the Income-tax Act defining a Protective Assessment. Instead, it is a judicially recognised practice used where the Department believes certain income is taxable but there is genuine uncertainty about which person should ultimately be assessed on that income.
For example, if the same income may legally belong to either Person A or Person B, assessment proceedings may be undertaken protectively to ensure that the income does not escape taxation because of limitation issues.
Courts have recognised the concept of protective or precautionary assessment. However, protective recovery is different from protective assessment, and tax cannot simply be recovered twice on the same income.
Once it is finally established who is liable, the substantive assessment determines where the tax is ultimately payable.
Time Limit for Completing an Income Tax Assessment
Different assessment proceedings have different statutory time limits.
For Tax Year 2026–27 onward under the Income-tax Act, 2025, some important timelines include:
| Assessment/Action | General Time Limit |
|---|---|
| Summary intimation under Section 270(1) | 9 months from the end of the financial year in which the return is filed |
| Scrutiny notice under Section 270(8) | 3 months from the end of the financial year in which the return is furnished |
| Regular/Scrutiny assessment under Section 270(10) | Generally 1 year from the prescribed reference date under Section 286 |
| Best Judgment Assessment under Section 271 | Generally 1 year from the prescribed reference date under Section 286 |
| Reassessment under Section 279 | Generally 1 year from the end of the financial year in which the Section 280 notice was served |
| Search/Block Assessment under Section 294 | Generally 18 months from the end of the quarter in which the search was initiated or requisition made |
Section 286 provides the principal completion timelines for regular assessments, best judgment assessments and reassessments, while Section 296 provides the special timeline for block assessments.
These periods can be extended or certain periods can be excluded in specified circumstances, such as:
- Court stays
- Transfer pricing references
- Special audits
- Valuation references
- International exchange of information
For Assessment Year 2026–27 and earlier years, the timelines under the Income-tax Act, 1961 continue to apply.
Penalty for Late or Non-Filing of Income Tax Return
Failing to file an ITR by the applicable due date can lead to additional costs and other consequences.
Under the Income-tax Act, 2025, Section 428 provides for a late-filing fee where a person required to furnish a return does not do so within the prescribed due date.
The fee is generally:
| Total Income | Late-Filing Fee |
|---|---|
| Up to ₹5 lakh | Up to ₹1,000 |
| Above ₹5 lakh | ₹5,000 |
Depending on the circumstances, delayed filing can also result in:
- Interest on unpaid tax
- Restrictions relating to certain losses
- Delay in receiving a refund
- Additional tax where an updated return is filed
- Further consequences in cases involving wilful non-compliance
For Assessment Year 2026–27 and earlier periods governed by the old Act, the corresponding late-return fee continues under Section 234F of the Income-tax Act, 1961.
Filing your return accurately and responding to Income Tax Department notices within the prescribed timelines can help reduce the risk of additional tax, interest, fees or prolonged assessment proceedings.
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FAQs On Income Tax Assessment
1. What Is the Assessment of Tax Under the Income Tax Act?
Income tax assessment refers to the processing, examination or determination of the income, loss, tax liability or refund of an assessee.
Depending on the circumstances, this can range from automated return processing to detailed scrutiny, reassessment or a special block assessment following a search.
2. What Is Regular Assessment in Income Tax?
Regular assessment generally refers to a detailed assessment carried out after a return is selected for examination.
Under the Income-tax Act, 2025, a scrutiny notice can be issued under Section 270(8) and the Assessing Officer can subsequently pass an assessment order under Section 270(10).
The officer can examine whether the taxpayer has:
- Understated income
- Computed excessive losses
- Underpaid tax
This is why regular assessment and scrutiny assessment should not be treated as completely separate categories in this article.
3. What Do You Mean by Scrutiny Assessment?
Scrutiny assessment is a detailed examination of an income-tax return and supporting information by the Income Tax Department.
For Tax Year 2026–27 onward, the scrutiny framework is contained in Section 270 of the Income-tax Act, 2025.
For earlier years governed by the Income-tax Act, 1961, the familiar provisions are Sections 143(2) and 143(3).
4. What Is a Faceless Tax Assessment?
A faceless assessment is an assessment conducted electronically without requiring routine face-to-face interaction between the taxpayer and the Assessing Officer.
Communication, submission of documents and other parts of the assessment can take place through the Income Tax e-Filing Portal and designated electronic systems.
The Income Tax Department has confirmed that the faceless-assessment framework continues under the Income-tax Act, 2025.
5. Who Is an Assessing Officer in Income Tax?
An Assessing Officer is an authorised Income Tax Department official who exercises assessment powers for cases falling within their assigned jurisdiction.
Under the Income-tax Act, 2025, Section 2(12) includes specified officers such as Assistant Commissioners, Deputy Commissioners and Income-tax Officers, as well as certain other officers when appropriately authorised.
6. What Does the Term ‘Assessee’ Mean Under the Income Tax Act?
An assessee is broadly a person who is liable to pay tax or another sum under the Income-tax Act or a person in respect of whom specified assessment proceedings have been taken.
For periods governed by the Income-tax Act, 1961, the definition appears in Section 2(7).
For Tax Year 2026–27 onward under the Income-tax Act, 2025, the definition appears in Section 2(11).
