Chapter XVI - Procedure for Assessment
Section 270
Section 270: assessment
Section 270 covers two connected stages of assessment: first, the automatic processing of every return filed under Section 263 (correcting arithmetical errors, disallowing certain claims, and issuing an intimation of tax payable or refund due); and second, the fuller regular assessment where the Assessing Officer can call for evidence and pass a formal assessment order.
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This article is for general information. Refer to the Income-tax Act, 2025 as amended by the Finance Act, 2026 and the Taxation and Other Laws (Amendment) Act, 2026 for the official provisions. If you need professional advice for your situation, contact Bizeneed.
Statutory text
Bare law
(1) Where a return has been made under section 263, or in response to a notice under section 268(1) such return shall be processed in the following manner:— (a) the total income or loss shall be computed after making the adjustments towards the following:—(i) any arithmetical error in the return; or (ii) an incorrect claim, if such incorrect claim is apparent from any information in the return; or (iii) any such inconsistency in the return, with respect to the information in the return of any preceding tax year, as may be prescribed; or (iv) disallowance of loss claimed, if return of the tax year for which set off of loss is claimed was furnished beyond the due date specified under section 263(1); or (v) disallowance of expenditure or increase in income indicated in the audit report but not taken into account in computing the total income in the return; or (vi) disallowance of deduction claimed under any of the provisions of Chapter VIII-C, if the return is furnished beyond the due date specified under section 263(1); (b) the tax, interest and fee, if any, shall be computed on the basis of the total income computed under clause (a); (c) the sum payable by, or the amount of refund due to, the assessee shall be determined after adjustment of the tax, interest and fee, if any, computed under clause (b) by— (i) any tax deducted at source; (ii) any tax collected at source; (iii) any advance tax paid; (iv) any rebate or relief allowable under Chapter IX; (v) any tax paid on self-assessment; and (vi) any amount paid otherwise by way of tax, interest or fee; (d) an intimation shall be sent to the assessee specifying the sum determined to be payable by, or refund due to, the assessee under clause (c); and (e) the amount of refund due to the assessee in pursuance of the determination under clause (c) shall be granted to the assessee.
(2) Before making any adjustment under sub-section (1)(a),— (a) a communication is to be given to the assessee of such adjustments either in writing or in electronic mode; (b) the response received from the assessee in this regard, if any, shall be considered; and in a case where no response is received within thirty days of the issue of such communication, such adjustments shall be made and thereafter the intimation under sub-section (1)(d) shall be sent.
(3) For the purposes of sub-section (1), an intimation shall also be sent to the assessee in a case where the loss declared in the return by the assessee is adjusted but no tax, interest or fee is payable by, or no refund is due to, him.
(4) No intimation under sub-section (1) shall be sent after the expiry of nine months from the end of the financial year in which the return is made.
(5) For the purposes of sub-sections (1) to (4),— (a) “an incorrect claim apparent from any information in the return” shall mean a claim, on the basis of an entry, in the return,— (i) of an item, which is inconsistent with another entry of the same or some other item in such return; or (ii) in respect of which the information required to be furnished under this Act to substantiate such entry has not been so furnished; or (iii) in respect of a deduction, where such deduction exceeds specified statutory limit which may have been expressed as monetary amount or percentage or ratio or fraction; (b) “the acknowledgement of the return” shall be deemed to be the intimation in a case where no sum is payable by, or refundable to, the assessee under sub-section (1)(c), and where no adjustment has been made under sub-section (1)(a).
(6) For the purposes of processing of returns under sub-section (1), the Board may make a scheme for centralised processing of returns with a view to expeditiously determining the tax payable by, or the refund due to, the assessee as required under the said sub-section.
(7) The scheme made under sub-section (6) shall, as soon as may be laid before each House of Parliament.
(8) Where a return has been furnished under section 263 or in response to a notice under section 268(1), the Assessing Officer or the prescribed income-tax authority, if, considers it necessary or expedient to ensure that the assessee— (a) has not understated the income; (b) has not computed excessive loss; (c) has not under-paid the tax in any manner, shall serve on the assessee a notice requiring him, on a date to be specified therein,— (i) either to attend the office of the Assessing Officer; or (ii) to produce, or cause to be produced before the Assessing Officer any evidence on which the assessee may rely in support of the return.
(9) No notice under sub-section (8) shall be served on the assessee after the expiry of three months from the end of the financial year in which the return is furnished.
(10) On the day specified in the notice issued under sub-section (8), or as soon afterwards as may be, after hearing such evidence as the assessee may produce and such other evidence as the Assessing Officer may require on specified points, and after taking into account all relevant material which he has gathered, the Assessing Officer, subject to the provisions of sub-sections (11) and (13), shall— (a) by an order in writing, make an assessment of the total income or loss of the assessee; and (b) determine the sum payable by him or refund of any amount due to him on the basis of such assessment.
(11) In the case of entities referred to in sub-section (12), which are required to furnish the return of income under section 263(1)(a)(iv), no order under sub-section (10) making an assessment of the total income or loss of any such entity shall be made by the Assessing Officer, without giving effect to the provisions of section 11, unless— (i) the Assessing Officer has intimated the Central Government or the prescribed authority the contravention of the provisions mentioned in Schedule III (Table: Sl. No. 23, 24 or 25), by such entity, where in his view such contravention has taken place; and (ii) the approval granted to such entity has been withdrawn or notification issued in respect of such entity has been rescinded.
(12) For the purposes of sub-section (11), the entities shall be— (a) a research association referred to in Schedule III (Table: Sl. No. 23); (b) an association or institution referred to in Schedule III (Table: Sl. No. 24); (c) an institution referred to in Schedule III (Table: Sl. No. 25).
(13) In the case of a registered non-profit organisation, where the Assessing Officer is satisfied that any such entity has committed any specified violation as mentioned in section 351(1), he shall— (a) send a reference to the Principal Commissioner or Commissioner to withdraw the approval or registration; and (b) no order under sub-section (10) making an assessment of the total income or loss of such registered non-profit organisation shall be made by him without giving effect to the order passed by the Principal Commissioner or Commissioner under section 351(2)(ii)(A) or (B).
(14) While making an assessment under sub-section (10), where the Assessing Officer is satisfied that the activities of the university, college or other institution referred to in section 45(3)(a) (herein referred to as entity) are not being carried out in accordance with all or any of the conditions subject to which such entity was approved, then— (a) he may, after giving a reasonable opportunity of showing cause against the proposed withdrawal to the concerned entity, recommend to the Central Government to withdraw the approval; and(b) the Central Government may by order, withdraw the approval and forward a copy of the order to the concerned entity and the Assessing Officer.
(15) Where a regular assessment under sub-section (10) or section 271 is made,— (a) any tax or interest paid by the assessee under sub-section (1) shall be deemed to have been paid towards such regular assessment; (b) if no refund is due on regular assessment or the amount refunded under sub-section (1) exceeds the amount refundable on regular assessment, the whole or the excess amount so refunded shall be deemed to be tax payable by the assessee and the provisions of this Act shall apply accordingly.
Introduction
Section 270 sets out the ordinary assessment process after a return is filed, including processing, notices, scrutiny and determination of taxable income or loss.
Its steps and time limits interact with return filing, inquiry, best-judgment assessment and later rectification provisions.
Key takeaways
Processing and scrutiny are distinct
Initial return processing permits listed adjustments; a regular assessment uses notice, evidence and a reasoned order.
Proposed adjustment must be shared
Before specified processing adjustments, the department must communicate the proposal and consider the assessee’s response.
Intimation has a deadline
A processing intimation cannot be sent beyond nine months from the end of the financial year in which the return was furnished.
Processing every return that is filed
Every return filed under Section 263, or in response to a notice under Section 268(1), is processed as follows: total income or loss is computed after adjusting for arithmetical errors; incorrect claims apparent from information in the return; prescribed inconsistencies with the preceding year's return; disallowance of a loss claimed where the loss-year return was filed after the Section 263(1) due date; disallowance of expenditure or increase of income flagged in the audit report but not reflected in the return; and disallowance of a Chapter VIII-C deduction where the return was filed after the due date.
Tax, interest and fee are then computed on this adjusted total income, and the sum payable or refund due is determined after adjusting for TDS, TCS, advance tax paid, rebates/reliefs under Chapter IX, self-assessment tax paid, and other amounts already paid.
An intimation is then sent to the assessee specifying the sum payable or the refund due, and any refund due is granted.
Giving the assessee a chance to respond before adjustment
Before making any adjustment described above, the assessee must be communicated the proposed adjustment in writing or electronically. Any response received is considered; if no response is received within thirty days of the communication, the adjustment is made and the intimation is then sent.
Intimation even where only a declared loss is adjusted
An intimation is also sent where the declared loss is adjusted but no tax, interest or fee is payable and no refund is due.
Time limit for sending the intimation
No intimation under this processing step can be sent after the expiry of nine months from the end of the financial year in which the return is made.
Where no amount is payable or refundable and no subsection (1)(a) adjustment is made, subsection (5)(b) treats the return acknowledgement as the intimation.
Centralised processing scheme
The Board may make a scheme for centralised processing of returns, to expeditiously determine tax payable or refund due. This scheme must be laid before each House of Parliament as soon as may be.
Notice for a full (regular) assessment
Where a return has been furnished under Section 263 or in response to a Section 268(1) notice, and the Assessing Officer (or prescribed authority) considers it necessary to check that income has not been understated, loss not overstated, or tax not underpaid, they may serve a notice requiring the assessee to attend the office or produce supporting evidence.
This notice cannot be served after the expiry of three months from the end of the financial year in which the return was filed.
Passing the assessment order
On the date specified in the notice (or soon after), having heard the assessee's evidence and considered all relevant material, the Assessing Officer makes an order in writing assessing total income or loss, and determines the sum payable or refund due based on that assessment.
Extra safeguards for specified charitable/institutional entities
For research associations, associations/institutions and other institutions referred to in Schedule III (Sl. No. 23, 24, 25), no assessment order can be made without giving effect to Section 11, unless the Assessing Officer has intimated the relevant contravention to the Central Government/prescribed authority and the entity's approval/notification has been withdrawn or rescinded.
For a registered non-profit organisation where the Assessing Officer is satisfied a specified violation under Section 351(1) has occurred, a reference must be sent to the Principal Commissioner/Commissioner to withdraw approval or registration, and no assessment order can be made without giving effect to that Principal Commissioner's/Commissioner's order.
Where a university, college or institution under Section 45(3)(a) is found not to be carrying out its activities per the conditions of its approval, the Assessing Officer may, after giving a show-cause opportunity, recommend withdrawal of approval to the Central Government, which may then withdraw it.
Reconciling earlier payments with the regular assessment
Where a regular assessment under subsection (10) or section 271 is made, tax or interest paid under subsection (1) is credited towards that regular assessment. If no refund is due on regular assessment, the whole earlier subsection (1) refund is deemed tax payable; if the earlier refund exceeds the amount due, the excess is deemed tax payable. This subsection specifically refers to processing payments and refunds under subsection (1).
Step-by-step flow for processing and assessment under Section 270
- 1
Was a return made under section 263 or in response to a notice under section 268(1)?
- No: Processing under Section 270(1) does not arise.
- Yes: The return is processed under Section 270(1). Go to the next step.
- 2
Is any adjustment under Section 270(1)(a) proposed?
The six items are: an arithmetical error, an incorrect claim apparent from the return (as defined in Section 270(5)(a)), a prescribed inconsistency with an earlier year's return, a loss set-off where that year's return was beyond the section 263(1) due date, an addition shown in the audit report but not taken into account, and a Chapter VIII-C deduction in a return filed beyond the due date.
- Yes: The assessee is told in writing or electronically and any response is considered. If no response comes within thirty days, the adjustment is made (Section 270(2)). Go to the next step.
- No: Go to the next step.
- 3
Compute the sum payable or refund and send the intimation
Tax, interest and fee are adjusted for TDS, TCS, advance tax, Chapter IX relief, self-assessment tax and other payments (Section 270(1)(c)). No intimation can be sent after nine months from the end of the financial year in which the return is made (Section 270(4)). Where nothing is payable or refundable and no adjustment is made, the acknowledgement is the intimation (Section 270(5)(b)).
- 4
Is a scrutiny notice served under Section 270(8)?
It may be served to ensure income is not understated, loss not overstated and tax not underpaid, but not after three months from the end of the financial year in which the return is furnished (Section 270(9)).
- No: The processing under Section 270(1) stands, subject to other provisions of the Act.
- Yes: Go to the next step.
- 5
Assessment order under Section 270(10)
After hearing the evidence and considering all relevant material, the AO makes a written order and determines the sum payable or refund. Special conditions apply to the entities in Section 270(11) and (12), registered non-profit organisations (Section 270(13)) and institutions under section 45(3)(a) (Section 270(14)).
- 6
Link with the processing stage
Tax or interest paid under Section 270(1) counts towards the regular assessment. If no refund is due on assessment, or less than was refunded, the excess refunded is deemed tax payable (Section 270(15)).
Practical checklist
Do
- Reconcile any processing intimation with the filed return and tax credits.
- Respond to a scrutiny notice with issue-specific evidence within the stated period.
- Track the assessment order, demand or refund and any appeal deadline.
Avoid
- Assume a processing intimation means every item in the return has been fully scrutinised.
Illustrative example
Worked example: an adjustment, the time limits and a refund clawback
Hypothetical facts (illustration only, not a real taxpayer): Ms. Nair furnishes her return for tax year 2026-27 on 25 July 2027, declaring income of ₹12,00,000. She claims a deduction of ₹2,00,000 under a provision that, for this example, is assumed to cap the deduction at ₹1,50,000. All amounts and the cap are assumed for illustration.
Incorrect claim
A deduction above a statutory limit is an "incorrect claim apparent from any information in the return" (Section 270(5)(a)(iii)). The proposed adjustment is ₹2,00,000 − ₹1,50,000 = ₹50,000.
Communication
She is informed of the adjustment. She does not reply within thirty days, so the adjustment is made and income is computed at ₹12,00,000 + ₹50,000 = ₹12,50,000 (Section 270(2)).
Time limits
The return was made in the financial year ending 31 March 2028. The intimation must be sent by 31 December 2028 (Section 270(4)); a scrutiny notice under Section 270(8) cannot be served after 30 June 2028 (Section 270(9)).
Refund later reduced
Assume the intimation granted a refund of ₹20,000 and a regular assessment later finds only ₹5,000 refundable. The excess ₹20,000 − ₹5,000 = ₹15,000 is deemed tax payable (Section 270(15)(b)).
Outcome
- Income is processed at ₹12,50,000 after the unanswered thirty-day communication.
- The nine-month and three-month limits run from the end of the financial year in which the return is filed, not from the end of the tax year.
Frequently asked questions
How long does the tax department have to send an intimation after I file my return?
No intimation on processing of the return under Section 270(1) can be sent after the expiry of nine months from the end of the financial year in which the return is filed.
How long does the department have to issue a scrutiny notice after I file my return?
A notice under Section 270(8) for a fuller assessment cannot be served after the expiry of three months from the end of the financial year in which the return was furnished.
Do I get a chance to respond before an adjustment is made to my return?
Yes - you must be communicated the proposed adjustment in writing or electronically, and any response within thirty days is considered before the adjustment and intimation are finalised.
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