Last reviewed: 8 July 2026. A tax audit under Section 44AB is not optional once you cross the turnover or receipts limits, and missing it can cost a fee of up to Rs 1.5 lakh and delay your return. This guide sets out the thresholds in full - including the Rs 10 crore digital-business limit - the situations that quietly trigger an audit, the forms, the due dates and how to prepare.
At a glance
Who needs a tax audit
| Taxpayer | Threshold |
|---|---|
| Business - mostly digital (cash within 5%) | Turnover > Rs 10 crore |
| Business - cash more than 5% | Turnover > Rs 1 crore |
| Profession | Gross receipts > Rs 50 lakh |
| Presumptive opt-out (44AD/44ADA) | Lower profit declared and income above basic exemption |
The Rs 10 crore digital-business condition
The higher Rs 10 crore limit is available only where both total cash receipts and total cash payments are 5% or less of the respective totals. This rewards businesses that transact almost entirely through banking channels. If cash crosses 5% on either side, the ordinary Rs 1 crore threshold applies.
The audit report forms
The auditor issues Form 3CA (where accounts are already audited under another law, such as the Companies Act) or Form 3CB (otherwise), together with the detailed particulars in Form 3CD - covering loans, related-party payments, disallowances, TDS compliance and more.
Prepare early
- Close your books and reconcile GST, TDS and bank data before the auditor starts.
- Keep the Form 3CD annexures ready - loans, cash transactions, disallowances.
- Target the 30 September report date; a late audit blocks a timely return and invites the fee.
Frequently asked questions
What is the turnover limit for a tax audit under 44AB?
A business needs a tax audit if turnover exceeds Rs 1 crore. This rises to Rs 10 crore if cash receipts and cash payments are each within 5% of the total - i.e. the business is almost fully digital. For professionals, the limit is Rs 50 lakh of gross receipts.
How does the Rs 10 crore limit work?
If both your total cash receipts and total cash payments during the year are 5% or less of the respective totals, the audit threshold for business is raised from Rs 1 crore to Rs 10 crore. Cross 5% on either side and the Rs 1 crore limit applies.
What is the due date for AY 2026-27?
The tax audit report is due by 30 September 2026 and the income tax return for audited taxpayers by 31 October 2026. Transfer pricing cases get an extended timeline.
What is the penalty for not getting audited?
A fee of 0.5% of turnover or gross receipts, up to Rs 1,50,000, can be levied under Section 271B. From Budget 2026 this is treated as a fee rather than a penalty.
Does opting out of presumptive taxation trigger an audit?
Yes. If you had declared income under Section 44AD and then declare lower profits within the lock-in period while your total income exceeds the basic exemption limit, a tax audit becomes applicable even below Rs 1 crore.
Which forms make up the tax audit report?
The auditor issues Form 3CA (where accounts are already audited under another law) or Form 3CB (otherwise), along with the detailed statement of particulars in Form 3CD.
Is a tax audit the same as a statutory or GST audit?
No. A statutory audit is under the Companies Act, a GST audit relates to GST returns, and a tax audit under 44AB is specifically an income-tax requirement based on turnover or profession.
Do professionals under 44ADA need an audit?
A professional opting for presumptive taxation under 44ADA (up to Rs 75 lakh receipts, mostly digital) generally avoids audit, but if they declare lower profits and their income exceeds the basic exemption, audit applies.
What records should I keep for the audit?
Books of account, bank statements, GST and TDS records, fixed asset and loan registers, and details of related-party and cash transactions - the auditor reports many of these in Form 3CD.
What happens if the audit report is filed late?
A late report can attract the 271B fee and can also delay a timely return. Plan for the 30 September report date so your return is filed on time.
We conduct the 44AB audit, prepare Form 3CA/3CB-3CD and file your return within the due date.
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