Tax Audit Under Section 44AB: Who Needs It and What the 30 September Deadline Means

For businesses and professionals, tax compliance is more than simply filing an income tax return. In certain cases, the law also requires the taxpayer’s accounts to be audited by a Chartered Accountant and a tax audit report to be furnished to the Income Tax Department.

This requirement is commonly referred to as a tax audit under Section 44AB of the Income-tax Act, 1961.

With 30 September 2026 approaching, businesses and professionals should determine whether they fall within the tax audit provisions for FY 2025–26 (AY 2026–27). Missing the requirement or leaving the audit process until the last minute can create avoidable compliance issues.

The good news is that the applicability rules are relatively straightforward once you understand the turnover and cash-transaction thresholds.

What Is a Tax Audit Under Section 44AB?

A tax audit is an examination of specified financial records and particulars by an eligible Chartered Accountant to determine whether the taxpayer has complied with relevant provisions of the Income-tax Act.

The purpose is not simply to verify whether a business has made a profit or loss. A tax audit also provides structured information about matters such as turnover, expenses, depreciation, deductions, tax-related transactions and other particulars that may be relevant to the taxpayer’s income-tax compliance.

For FY 2025–26, the applicable tax audit provisions are those under the Income-tax Act, 1961. The Income Tax Department has specifically clarified that the audit report for FY 2025–26, corresponding to AY 2026–27, must continue to be filed using the prescribed forms under the 1961 Act.

Who Needs a Tax Audit Under Section 44AB?

Tax audit applicability depends primarily on the nature of the taxpayer’s activity, turnover or gross receipts and, in some cases, the manner in which receipts and payments are made.

1. Businesses With Turnover Above the Prescribed Limit

For a person carrying on a business, tax audit generally becomes applicable when total sales, turnover or gross receipts exceed ₹1 crore in the relevant financial year.

However, there is an important higher threshold.

Where the taxpayer’s cash receipts do not exceed 5% of total receipts and cash payments do not exceed 5% of total payments, the tax audit threshold for business can increase to ₹10 crore.

The Income Tax Department confirms these thresholds for the tax audit framework.

This means a business should not look at turnover alone. It should also examine the proportion of cash transactions during the year.

2. Professionals With Gross Receipts Above ₹50 Lakh

Tax audit provisions can also apply to professionals.

For a person carrying on a profession, the relevant threshold is generally gross receipts exceeding ₹50 lakh during the financial year.

Professionals should therefore track their gross receipts throughout the year instead of waiting until the end of the financial year to determine whether an audit is required.

The threshold can be particularly relevant for professionals such as consultants, doctors, lawyers, architects and other specified professional categories, depending on the nature of their activities and the applicable provisions.

Understanding the ₹1 Crore and ₹10 Crore Tax Audit Limits

The different business thresholds can sometimes cause confusion.

Consider a simplified example.

Suppose Business A has annual turnover of ₹7 crore. If its cash receipts and cash payments remain within the prescribed 5% limits, it may fall within the higher ₹10 crore threshold.

Now consider Business B with the same ₹7 crore turnover but significant cash receipts or payments exceeding the applicable 5% conditions. The higher threshold may not be available, meaning the ₹1 crore threshold becomes relevant.

Therefore, turnover should always be assessed together with the cash-transaction conditions.

Businesses should review their books, bank statements, cash book and accounting records before concluding that tax audit is not applicable.

Tax Audit and Presumptive Taxation

Tax audit provisions can also interact with the presumptive taxation schemes available under the Income-tax Act.

Presumptive taxation is designed to simplify compliance for eligible taxpayers by allowing income to be declared according to prescribed rules rather than requiring detailed determination of actual business or professional income in the usual manner.

However, choosing not to follow the presumptive taxation framework or declaring income below the prescribed level in certain circumstances can trigger audit requirements.

The Income Tax Department specifically identifies taxpayers who opt out of presumptive taxation and declare income below the prescribed threshold among the circumstances requiring attention for tax audit applicability.

Because these provisions can depend on the taxpayer’s circumstances and previous-year treatment, businesses and professionals should evaluate the applicable section rather than assuming that presumptive taxation automatically eliminates every audit requirement.

What Is the Tax Audit Due Date for AY 2026–27?

For FY 2025–26 / AY 2026–27, the standard due date for furnishing the tax audit report is 30 September 2026.

The Income Tax Department has confirmed that the tax audit report for AY 2026–27 is to be furnished by 30 September 2026 in cases where the corresponding income-tax return due date is 31 October 2026.

This effectively gives taxpayers one month between the standard tax audit report deadline and the corresponding income-tax return deadline.

However, taxpayers covered by transfer-pricing provisions can have different timelines. For such cases, the Income Tax Department indicates a tax audit/report deadline of 31 October 2026, where the applicable ITR due date is 30 November 2026.

Therefore, taxpayers should identify their exact compliance category rather than relying on a generic deadline.

Which Forms Are Used for Tax Audit for FY 2025–26?

For FY 2025–26 / AY 2026–27, the existing tax audit forms under the Income-tax Act, 1961 continue to apply.

Depending on the circumstances, the relevant forms include:

• Form 3CA – where the taxpayer’s accounts are already required to be audited under another law.
• Form 3CB – for taxpayers who are required to obtain a tax audit but whose accounts are not required to be audited under another law.
• Form 3CD – the statement containing prescribed particulars associated with the tax audit.

The Income Tax Department confirms the use of Form 3CA/3CB along with Form 3CD for AY 2026–27.

The tax audit report is furnished electronically through the income-tax e-filing system by the tax auditor.

What Information Is Reviewed During a Tax Audit?

A tax audit involves considerably more than checking the final profit figure.

The auditor may review financial records and information relating to areas such as:

• Sales, turnover and gross receipts
• Purchases and business expenses
• Cash receipts and cash payments
• Loans and other financial transactions
• Depreciation
• Deductions and allowances
• Payments requiring tax deduction or collection considerations
• Certain specified expenses and disallowances
• Related-party or specified transactions
• Other particulars required under Form 3CD

The exact information required depends on the taxpayer’s circumstances and the applicable reporting requirements.

This is why maintaining accurate books throughout the year can make the tax audit process substantially smoother.

What Happens If You Miss the Tax Audit Requirement?

Failure to comply with a tax audit requirement can have financial and compliance consequences.

Section 271B of the Income-tax Act contains provisions relating to penalties for failure to get accounts audited or furnish the audit report as required.

The penalty framework is generally linked to the turnover or gross receipts and is subject to the statutory limits and conditions applicable to the particular case.

Importantly, a taxpayer should not assume that filing the income-tax return alone satisfies the tax audit requirement. Where tax audit is applicable, the audit report itself is a separate compliance requirement.

There can also be practical consequences when the audit is left until the final days: incomplete accounting records, unreconciled transactions, missing documentation and discrepancies between books and other tax information can delay the process.

How Businesses Can Prepare for the 30 September 2026 Deadline

If you believe tax audit may apply to your business or profession, preparation should begin well before the deadline.

Step 1: Calculate Your Turnover or Gross Receipts

Start by determining the correct turnover or gross receipts for FY 2025–26.

Do not rely solely on the sales figure appearing in one accounting report. Reconcile your books and identify the correct figure under the applicable tax provisions.

Step 2: Review Cash Transactions

If your business turnover is between ₹1 crore and ₹10 crore, pay particular attention to cash receipts and payments.

The 5% conditions are important when determining whether the higher ₹10 crore threshold can apply.

Step 3: Check Your Presumptive Taxation Position

If you have used or opted out of a presumptive taxation scheme, review whether your declared income and other circumstances create an audit requirement.

Step 4: Reconcile Your Financial Records

Before the auditor begins the review, reconcile:

• Bank accounts
• Cash balances
• Sales and purchase records
• GST-related records
• TDS records
• Expense ledgers
• Loans and advances
• Fixed assets
• Debtors and creditors

A clean reconciliation process can help identify discrepancies before they become filing problems.

Step 5: Keep Supporting Documents Ready

Invoices, expense bills, bank statements, agreements, loan documents and other relevant records should be organised and readily accessible.

Good documentation is particularly important where an expense, deduction or transaction requires additional explanation.

Step 6: Coordinate With Your Chartered Accountant

Do not wait until September to contact your auditor.

The auditor needs sufficient time to review the records, raise queries, obtain supporting documents and complete the applicable reporting requirements.

Tax Audit vs Income Tax Return: Are They the Same?

No.

A tax audit report and an income-tax return (ITR) are separate compliance requirements.

Where tax audit applies, the audit report is prepared and furnished by the Chartered Accountant. The taxpayer then has to comply with the applicable income-tax return filing requirement.

For AY 2026–27, the standard tax audit report deadline is 30 September 2026, while the corresponding ITR deadline for taxpayers in the relevant category is generally 31 October 2026.

This distinction is important because completing one does not automatically mean the other has been completed.

A Quick Tax Audit Applicability Checklist

Before the 30 September 2026 deadline, ask:

• Is my activity a business or profession?
• What are my total sales, turnover or gross receipts for FY 2025–26?
• Does my business turnover exceed ₹1 crore?
• If turnover is within ₹10 crore, do my cash receipts and payments satisfy the 5% conditions?
• Are my professional receipts above ₹50 lakh?
• Have I opted for or out of a presumptive taxation scheme?
• Does another law require my accounts to be audited?
• Have I appointed a Chartered Accountant for the required audit?
• Are my books and supporting documents complete?
• Has the applicable tax audit report been furnished within the prescribed deadline?

If the answer to the relevant applicability questions indicates that tax audit is required, it is better to begin the process immediately rather than wait for the final days.

Final Thoughts

Tax audit under Section 44AB is not merely a year-end formality. It is an important part of the income-tax compliance framework for eligible businesses and professionals.

For FY 2025–26 / AY 2026–27, the standard tax audit deadline of 30 September 2026 makes September an important month for taxpayers who fall within the audit provisions.

The key is to assess applicability correctly: look at turnover or gross receipts, understand the cash-transaction conditions, consider presumptive taxation provisions where relevant and ensure that financial records are properly reconciled.

If you are unsure whether Section 44AB applies to your business, consulting a qualified Chartered Accountant before the deadline can help you determine the applicable requirement and complete the necessary compliance on time.

In tax compliance, identifying the requirement early is always better than discovering it at the deadline.