India Income Tax Compliance: October 2026 Deadlines for Businesses & Investors

October 2026 is an important compliance month for businesses and investors in India, with income tax deduction, reporting, return-filing, transfer-pricing, and investment-related obligations falling due throughout the month. It also marks the first major quarterly reporting cycle under the Income Tax Act 2025 and Income Tax Rules 2026.

The October calendar covers routine tax deducted at source (TDS)/tax collected at source (TCS) compliance, income-tax return filing for specified taxpayers for AY 2026-27, transfer-pricing and international tax reporting, and specialised obligations applicable to financial intermediaries, investment funds, foreign investors, and businesses undertaking cross-border transactions.

October income tax compliance priorities for businesses

Businesses should treat October as a month requiring coordination between routine tax payments, quarterly reporting, annual return filing, and specialised tax compliance.

The key priorities are as follows:

1. Maintain accurate tax records: Ensure that accounting, payroll, vendor, investment, and transaction records support the tax amounts reported and paid during the month.
2. Complete quarterly reconciliation: Bring July-September 2026 tax deduction and collection records up to date before submitting the relevant quarterly statements.
3. Coordinate annual tax compliance: For taxpayers with a 31 October return deadline, align the income tax computation with the audited financial statements, tax-audit information, and supporting records.
4. Identify entity-specific obligations: Businesses should separately assess whether their activities trigger transfer pricing, international tax, investment fund, International Financial Services Centre (IFSC), Virtual Digital Asset (VDA), country-by-country reporting (CbCR), or tax-incentive reporting requirements.
5. Assign responsibility early: Finance, payroll, tax, audit, legal, and investment personnel should identify their respective filings and complete the supporting documentation before the relevant deadlines.

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October 2026 income tax compliance calendar

7 October: TDS and TCS payments

Businesses and other persons responsible for deducting or collecting tax must deposit TDS/TCS for September 2026 by 7 October 2026.

The calendar also provides for the deposit of tax deducted for July-September 2026, where the Assessing Officer has permitted quarterly TDS deposits under the applicable provisions. Government offices have separate payment requirements where tax is deposited without production of a challan.

Businesses should reconcile the relevant transactions before depositing the tax. This includes the following:

1. Employee salary payments
2. Professional and consultancy fees
3. Rent
4. Commission and brokerage
5. Contractor payments
6. Other payments subject to TDS
7. Transactions subject to TCS
8. Tax deposited against the relevant deductions or collections.

7 October is also the deadline for uploading certain declarations received during September 2026, including Form 121 declarations for the quarter ending September 2026 and Form 127 declarations received from buyers during September 2026, where the relevant provisions apply.

15 October: Quarterly and cross-border reporting

October 15 covers several reporting requirements relevant to financial intermediaries and businesses involved in specified cross-border transactions.

Form 132 – TDS certificate

Relevant deductors must issue Form 132 for tax deducted at source during August 2026 under the specified provisions of the Income Tax Act 2025.

Businesses should verify their TDS records, deductee details, tax deducted, and tax deposited before issuing the certificate.

Form 147 – Authorised dealers

An authorised dealer must furnish Form 147 for the quarter ended 30 September 2026, in respect of specified remittances.

The requirement is particularly relevant to banks and other authorised dealers handling specified outward remittances.

Form 148 – IFSC units

Units in an IFSC covered by the relevant provisions must furnish Form 148 for specified remittances made during the quarter ended 30 September 2026.

30 October: Form 141 challan-cum-statement

Taxpayers covered by the relevant provisions must furnish Form 141 for specified TDS deductions made during September 2026.

The form operates as a challan-cum-statement for the specified categories of payments. Businesses should verify the underlying payment records, deductee information, and tax amounts before submission.

31 October: Major income tax compliance deadline

31 October is the most important income tax compliance date in the month, bringing together the annual income-tax return, quarterly TDS/TCS reporting, transfer-pricing and international tax compliance, VDA reporting, and several specialised investment and tax-incentive obligations.

Income tax return for AY 2026-27

The Central Board of Direct Taxes (CBDT) has extended the due date for filing the return of income for AY 2026–27 from 31 October 2026 to 21 November 2026 for taxpayers covered within explanation 2 to Section 139(1) of the Income Tax Act 1961. This ITR extension was announced on 28 September 2026.

The corresponding deadline for furnishing the tax audit report for this category has also been extended from 30 September 2026 to 21 October 2026.

Before filing the return, businesses should reconcile their audited financial statements, books of account, tax adjustments, TDS/TCS credits, advance-tax payments, deductions and exemptions, related-party transactions, foreign transactions, tax audit information, and required disclosures.

Important: The extension applies only to the specified tax audit category. It does not extend the return-filing deadline for all taxpayers for AY 2026-27.

KNOW MORE: Central Board of Direct Taxes Extends AY 2026-27 ITR Filing Deadline for Tax-Audit Cases

Form 138 – Quarterly salary TDS statement

Employers responsible for deducting TDS from salaries must file Form 138 for the quarter ended 30 September 2026.

The same deadline applies to specified banks in relation to income paid to specified senior citizens under the relevant provisions.

Form 140 – Quarterly TDS statement for non-salary payments

Businesses deducting tax on specified non-salary payments to residents must file Form 140 for the quarter ended 30 September 2026.

The specified payments include commission, brokerage, professional fees, rent, and other applicable payments.

Form 144 – Quarterly TDS statement for non-resident payments

Businesses making specified payments to non-residents must file Form 144 for the quarter ended 30 September 2026.

The requirement covers specified non-salary payments to non-residents, including payments relating to overseas service providers, foreign consultants, royalties, technical or professional services, and other payments subject to withholding requirements.

Form 143 – Quarterly TCS statement

Businesses responsible for collecting tax at source must furnish Form 143 for the quarter ended 30 September 2026.

Transfer pricing and form 3CEB

Businesses undertaking international transactions or specified domestic transactions should complete the applicable transfer-pricing compliance by 31 October.

The relevant audit report is required for taxpayers whose accounts are subject to audit and who are required to report international or specified domestic transactions. Form 3CEB is also required in respect of international transactions and specified domestic transactions under Section 92E of the Income Tax Act 1961.

Businesses should ensure consistency between their intercompany agreements, transaction values, supporting documentation, and transfer-pricing reports.

Country-by-country reporting

31 October also includes reporting obligations connected with Country-by-Country Reporting (CbCR).

An Indian resident constituent entity of an international group may be required to file Form 3CEAB under the Income Tax Rules 1962 for the accounting year 2025-26.

The calendar also provides for Form 3CEAC, under which an Indian-resident constituent entity whose parent entity is not resident in India notifies the prescribed authority of details concerning the parent entity or alternate reporting entity.

Investment funds and foreign investors

Several 31 October tax obligations apply specifically to investment and financial entities.

Relevant requirements include:

1. Form 3CEJA: Chartered Accountant’s report for an eligible investment fund claiming the relevant treatment under Section 9A, subject to applicable conditions
2. Forms 10-IJ and 10-II: Reporting requirements applicable to specified Category III Alternative Investment Funds (AIF) in relevant circumstances under Section 10(23FF)
3. Sovereign wealth funds: Intimation concerning investments made in India for the quarter ended September 2026
4. Notified pension funds: Certification relating to investments in India

Important – These sections fall under the Income Tax Act 1961.

Specialised tax incentive and deduction reports

It also includes reports connected with specified tax deductions and incentives.

Relevant businesses may need to furnish reports relating to:

• Section 80JJAA – Additional employee cost
• Section 35(2AB) – Specified scientific research expenditure
• Sections 80-IA, 80-IB and 80-IC – Specified business deductions
• Section 80LA – Deductions relating to specified income of eligible IFSC units
• Other sector-specific deductions and tax incentives

Important – These sections fall under the Income Tax Act 1961. 

FAQs-October 2026 Income tax compliance

Why should businesses treat October as an important tax-compliance month?

October combines multiple compliance cycles. Businesses may have to manage routine tax payments, quarterly reporting, annual return preparation, and specialised obligations within the same month.

This makes internal reconciliation and coordination particularly important, especially where different teams are responsible for payroll, finance, tax, audit, investments, or cross-border transactions.

How can businesses avoid errors across multiple October filings?

Businesses should maintain a central compliance tracker. The underlying transaction data should be reconciled before the information is used across multiple returns or statements. 

What records should businesses keep ready for the October compliance cycle?

The precise records depend on the filing involved. However, businesses should ensure that the relevant accounting, payroll, tax-payment, transaction, audit, investment, and cross-border records are complete and readily available.

For businesses with related-party or international transactions, supporting commercial agreements and transaction documentation should also be organised.

Who should coordinate October income tax compliance within a company?

Responsibility will depend on the company’s structure. In practice, October compliance may require coordination among finance, tax, payroll, accounting, audit, legal, treasury, and investment teams.

Companies with international operations may also need input from transfer-pricing advisers and overseas group entities.

How should multinational businesses approach October compliance?

Multinational businesses should separately identify their Indian income-tax, transfer-pricing, withholding, and CbCR requirements.

They should also ensure that information received from overseas group entities is consistent with the Indian entity’s books, related-party disclosures, and tax documentation.

What should investment funds and foreign investors consider?

Investment funds and foreign investors should determine whether their entity type, investment structure, or activities trigger any specialised Indian reporting or certification requirements.

This assessment should be carried out separately from the standard corporate tax compliance review because the applicable requirements depend on the investor’s specific status and activities.

Does this income tax calendar cover GST, PF/ESI and corporate-law compliance?

No. The calendar is focused on income-tax obligations.

Businesses may have separate goods and services tax (GST), professional tax, provident fund (PF)/ employee state insurance (ESI), Companies Act, limited liability partnership (LLP), and other statutory requirements during October. These should be maintained in separate compliance trackers to provide a complete view of the company’s statutory.

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