India Tax Audit Section 63 for Foreign Subsidiaries

What Is a Tax Audit Under Section 63?

A tax audit under Section 63 of the Income-tax Act, 2025 (section 44AB of the Income-tax Act, 1961) is a mandatory examination of a taxpayer's books of accounts by a practicing Chartered Accountant (CA). Unlike a statutory audit under the Companies Act (which every company must undergo), a tax audit is specifically focused on verifying the correctness of income computation, the admissibility of deductions, and compliance with tax provisions.

For foreign-owned private limited companies operating in India, the tax audit is a critical annual compliance requirement that directly feeds into the income tax return filing process. The tax auditor reports on the particulars prescribed in the audit forms — the true and fair view of the financial statements is the statutory auditor's opinion, not the tax auditor's — and the report is filed electronically on the Income Tax Department's portal.

Section 44AB was introduced by the Finance Act, 1984 (effective from AY 1985-86) with the objective of ensuring that taxpayers maintain proper books of accounts, their income is correctly computed, and tax deductions and collections are properly recorded. For foreign subsidiaries, this audit assumes additional significance because of the intersection with transfer pricing compliance and international transaction reporting.

When Is a Tax Audit Mandatory for Foreign Subsidiaries?

A tax audit under Section 63 of the Income-tax Act, 2025 (section 44AB of the Income-tax Act, 1961) is mandatory when specific turnover or receipts thresholds are exceeded. For a foreign-owned subsidiary registered as a private limited company in India, the following thresholds apply for tax year 2026-27 (section 63(1) of the Income-tax Act, 2025):

Business Income Thresholds

The presumptive schemes in section 58 are open to resident individuals, Hindu undivided families and firms, not to companies, so the last row rarely bites a foreign-owned subsidiary.

The INR 10 Crore Relaxation

The enhanced threshold of INR 10 crore (up from INR 1 crore) applies only when at least 95% of all receipts and at least 95% of all payments during the financial year are made through banking channels (NEFT, RTGS, IMPS, UPI, debit/credit cards, or cheques). For most foreign subsidiaries that operate through formal banking channels, this higher threshold typically applies, meaning the tax audit is triggered only when turnover crosses INR 10 crore.

International Transaction Trigger

Even if a foreign subsidiary's turnover is below the Section 63 thresholds, it must still file a transfer pricing audit report in Form 48 (formerly Form 3CEB) if it has entered into international transactions with its associated enterprises. The transfer pricing audit under Section 172 of the Income-tax Act, 2025 (section 92E of the Income-tax Act, 1961) is separate from the tax audit under Section 63, but both may apply simultaneously, and both share the same October 31 filing deadline.

Which Audit Forms Apply to Foreign Subsidiaries?

The tax audit report is filed using specific forms depending on whether the company is also required to be audited under any other law. Since every Indian company must undergo a statutory audit under the Companies Act, 2013, the following forms apply:

Form 3CA

This is the audit report form used when the taxpayer is already required to be audited under another law (in this case, the Companies Act). Since every Indian private limited company, including foreign subsidiaries, must undergo a statutory audit, Form 3CA is the applicable audit report form for virtually all foreign subsidiaries.

Form 3CD

This is the detailed annexure to Form 3CA (or Form 3CB), containing 44 clauses that cover every aspect of the company's tax compliance. The CA must report on items including:

• Details of all deductions claimed under Chapter VIA
• Compliance with TDS/TCS provisions
• Details of international transactions with associated enterprises
• Land and building transactions below stamp duty value
• GST compliance status
• Details of loans and deposits exceeding prescribed limits
• Cash transactions exceeding INR 10,000

Form 3CB

This form is used when the taxpayer is not required to be audited under any other law. It is rarely applicable to foreign subsidiaries since they are almost always registered as companies under the Companies Act.

Form 3CE

This is the accountant's report that goes with section 59 of the Income-tax Act, 2025 (section 44DA of the Income-tax Act, 1961), which governs royalty and fees for technical services received by a non-resident from the Government or an Indian concern where the income is effectively connected with a permanent establishment or fixed place of profession in India. It is the foreign parent's obligation in that situation, not the Indian subsidiary's.

Tax Audit Process: Step-by-Step for Foreign Subsidiaries

The tax audit process for a foreign subsidiary follows a structured sequence that must be completed within tight deadlines.

Step 1: Appoint the Tax Auditor

The company's board of directors must formally appoint a practicing CA or CA firm as the tax auditor. This can be the same firm performing the statutory audit or a different one. For foreign subsidiaries with complex intercompany transactions, appointing a firm with transfer pricing expertise is advisable since the tax auditor must also report on international transactions in Form 3CD.

Step 2: Prepare Books of Accounts

Ensure all books of accounts are finalized and reconciled. Key preparatory steps include:

• Reconcile bank statements with cash/bank books
• Complete all intercompany account reconciliations
• Finalize all accruals, provisions, and adjustments
• Reconcile TDS credits with Form 168 (formerly Form 26AS) and AIS
• Ensure GST returns are reconciled with books
• Prepare a detailed schedule of international transactions

Step 3: Audit Fieldwork

The CA conducts the audit, examining books of accounts, vouchers, invoices, contracts, and supporting documents. For foreign subsidiaries, the auditor pays particular attention to:

• Intercompany transactions and their arm's length pricing
• TDS compliance on payments to the parent company (royalties, services, interest)
• FEMA compliance for inbound and outbound remittances
• Related party disclosures
• Compliance with section 393(2) of the Income-tax Act, 2025 (section 195 of the Income-tax Act, 1961) withholding on payments to non-residents

Step 4: Issue the Audit Report

The CA completes Form 3CA and Form 3CD, signs them with a Digital Signature Certificate (DSC), and uploads them electronically on the Income Tax e-filing portal. The taxpayer (authorized signatory of the company) must then log in and accept/approve the audit report on the portal.

Step 5: File the Income Tax Return

After the tax audit report is filed and accepted, the company files its income tax return in Form ITR-6. The return must incorporate all adjustments and disclosures from the tax audit report.

Critical Deadlines for Tax Year 2026-27

Foreign subsidiaries with transfer pricing obligations face the tightest compliance calendar in the Indian tax system. Missing any deadline triggers automatic penalties.

The dates above are for tax year 2026-27, the first year the Income-tax Act, 2025 applies; the corresponding filings for tax year 2025-26 fall a year earlier and are governed by the Income-tax Act, 1961, which section 536(2)(c) of the 2025 Act keeps alive for tax years beginning before 1 April 2026. The 30 November return date comes from section 263(1)(c) (Table, Sl. No. 1) of the Income-tax Act, 2025, which applies to any assessee required to furnish the section 172 report. A company with no international transactions files its return by 31 October instead, which pulls its tax audit report forward to 30 September.

The October 31 deadline is particularly critical because both the tax audit (Form 3CA/3CD) and the transfer pricing audit (Form 48) must be filed on the same date. Since these are interconnected — the transfer pricing audit informs several clauses in Form 3CD — both must be completed in coordination.

Penalties for Non-Compliance

The penalties for failing to comply with Section 63 tax audit requirements are significant and apply regardless of whether the underlying tax liability changes.

Fee Under Section 428(c)

Failure to get accounts audited under Section 63 of the Income-tax Act, 2025 (section 44AB of the Income-tax Act, 1961) attracts a fee under section 428(c) of the Income-tax Act, 2025 (the successor to the section 271B penalty of the Income-tax Act, 1961) of INR 75,000 for a delay of up to one month, rising to INR 1,50,000 thereafter. While this may seem modest, the real risk lies in the downstream consequences.

Downstream Consequences

• Defective return: An income tax return filed without the required tax audit report may be treated as defective under section 263(7) of the Income-tax Act, 2025 (section 139(9) of the Income-tax Act, 1961), with 15 days from the intimation to rectify the defect
• Best judgment assessment: The Assessing Officer may proceed with a best judgment assessment under section 271 of the Income-tax Act, 2025 (section 144 of the Income-tax Act, 1961), estimating income without regard to the company's actual books
• Disallowance of deductions: Certain deductions require the tax audit report as a prerequisite; without it, these deductions may be denied
• Increased scrutiny: Non-compliance with Section 63 is a red flag that often triggers a scrutiny assessment under section 270 of the Income-tax Act, 2025 (section 143(3) of the Income-tax Act, 1961)

Reasonable Cause Defence

No penalty is imposed if the taxpayer can demonstrate "reasonable cause" for the failure. Courts have accepted reasons such as natural calamities, serious illness of the person responsible, loss of books due to fire or theft (if reported to police), and labour strikes preventing access to records. However, administrative delays, late appointment of auditors, or unfamiliarity with Indian tax law are generally not accepted as reasonable cause.

Tax Audit vs. Other Audit Requirements

Foreign subsidiaries in India are typically subject to multiple audit requirements simultaneously. Understanding the differences prevents duplication and ensures nothing is missed.

While the statutory audit and tax audit can be performed by the same CA firm, it is common practice for foreign subsidiaries to appoint separate auditors for the statutory audit and the transfer pricing audit. This provides an additional layer of independent review, particularly for the complex intercompany transaction analysis required in transfer pricing documentation.

Key Takeaways

• Foreign subsidiaries with turnover exceeding INR 1 crore (or INR 10 crore where cash receipts and cash payments each stay within 5% of the total) must undergo a mandatory tax audit under section 63 of the Income-tax Act, 2025, with Form 3CA and Form 3CD being the applicable forms
• For a company that has to file the section 172 report, both that report and the tax audit report are due on 31 October, one month before the 30 November return date; a company with no international transactions files its return by 31 October and its tax audit report by 30 September
• Penalty for non-compliance is a fee under section 428(c) of the Income-tax Act, 2025 of INR 75,000 for a delay of up to one month, rising to INR 1,50,000 thereafter, but the real risks are defective return treatment, best judgment assessment, and increased scrutiny
• Coordinate the tax audit with the transfer pricing audit and statutory audit early — appoint auditors by July to allow adequate time for all three
• Ensure all intercompany accounts are reconciled and section 393(2) TDS on payments to the parent company is correctly deducted and deposited before the audit begins
• Work with a compliance specialist who understands the unique requirements of foreign-owned entities to avoid gaps between statutory, tax, and transfer pricing audits