Tax Audit Turnover explained: this guide covers what it means, who it applies to, the step-by-step process, documents required, fees, due dates and penalties in India — so you can stay compliant with confidence and avoid costly mistakes.
The Income-tax Act does not define "sales", "turnover" or "gross receipts", so the tax audit turnover figure is built from the CST Act, the CGST Act, section 2(91) of the Companies Act, ICAI's Glossary of Terms used in Financial Statements and the assessee's regular method of accounting.
From the ICAI Guidance Note on Tax Audit (Revised 2026), the concluding edition under the Income-tax Act, 1961. The audit obligation for later years is in section 63 of the Income-tax Act, 2025 with the report in Form No. 26 under rule 47 of the Income-tax Rules, 2026.
The gap the Guidance Note has to fill
Section 44AB turns on whether "total sales, turnover or gross receipts" exceed Rs 1 crore, or Rs 10 crore in the specified cash cases, and whether professional gross receipts exceed Rs 50 lakh. The Guidance Note records at paragraph 5.1 that none of those three terms is defined in the Act. The tax audit turnover therefore has to be constructed, and paragraphs 5.2 to 5.7 do exactly that.
The presumptive thresholds moved in the same direction. The Finance Act, 2023 raised the section 44AD limit from Rs 2 crore to Rs 3 crore from A.Y. 2024-25 where cash receipts do not exceed 5% of turnover or gross receipts, and the section 44ADA limit from Rs 50 lakh to Rs 75 lakh on the same cash condition.
Definition 1 — the Central Sales Tax Act, 1956
Section 2(j) defines turnover, in relation to a dealer liable to tax under that Act, as the aggregate of the sale prices received and receivable in respect of sales of goods in the course of inter-State trade or commerce during any prescribed period. Section 8A(1) requires sales tax to be deducted from the aggregate of sale price, and the sale price of goods returned within the prescribed time to be excluded, provided there is proper documentation and accounting adjustment.
Since 1 July 2017 central sales tax is leviable on inter-State sale of only six products — petroleum crude, diesel, petrol, aviation turbine fuel, natural gas and alcoholic liquor for human consumption. The definition survives as an aid to construction, not as a live measure for most assessees.
Definition 2 — the CGST Act, 2017
Aggregate turnover, section 2(6)
"Aggregate turnover" is the aggregate value of all taxable supplies (excluding inward supplies on which tax is payable on reverse charge), exempt supplies, exports of goods or services or both and inter-State supplies of persons having the same PAN, computed on an all-India basis, but excluding central tax, State tax, Union territory tax, integrated tax and cess.
Exempt supplies inside aggregate turnover include supplies attracting a nil rate, supplies wholly exempt from GST, and non-taxable supplies. The concept drives GST registration thresholds, composition eligibility and e-invoicing applicability.
Turnover in State or Union territory, section 2(112)
The same aggregate, but confined to one State or Union territory. The Guidance Note draws the distinction precisely: aggregate turnover is PAN-India across every registration; turnover in State is limited to that State's registration.
Paragraph 5.5 says it outright: the value of "Sales Turnover" as per the CGST Act, 2017 as reported in the periodical GST returns may be different from the value calculated for this purpose. Reconciling the two is work the auditor has to do — and clause 44 of Form 3CD forces part of that reconciliation into the report — but the GST figure is never simply lifted across.
Definition 3 — the Companies Act, 2013
Section 2(91): "turnover means gross amount of revenue recognised in the profit and loss account from the sale, supply, or distribution of goods or on account of services rendered, or both, by a company during a financial year."
Definition 4 — the ICAI Glossary
The Glossary of Terms used in Financial Statements defines "Sales Turnover" as the aggregate amount for which sales are effected or services rendered by an enterprise, and notes that "gross turnover" and "net turnover" (or gross and net sales) distinguish the sales aggregate before and after returns and trade discounts.
The operating rule at paragraph 5.6
Reading those definitions together, the Guidance Note settles the tax audit turnover on this basis:
- Turnover means the aggregate amount for which sales are effected or services rendered.
- If GST or any other tax is included in the sale price, no adjustment is made — the tax stays in turnover.
- If the indirect tax recovered is credited to a separate tax account and payments to the authority are debited to that same account, it is not included in turnover.
- Trade discounts can be deducted; commission allowed to third parties cannot.
- Sale of scrap shown separately under "miscellaneous income" must be included in turnover.
Method of accounting governs
Paragraph 5.7 anchors the whole computation: "sales", "turnover" and "gross receipts" are commercial terms and are construed in accordance with the method of accounting regularly employed by the assessee. Section 145(1) requires business income to be computed on the cash or mercantile system regularly employed, and that choice flows straight into the measurement of the tax audit turnover.
Worked example
A trading firm on the mercantile system reports the following for the year:
| Item | Amount | In turnover? |
|---|---|---|
| Invoiced sales, GST charged in the invoice and credited to a separate GST payable account | Rs 96,00,000 | Yes — Rs 96,00,000 net of GST |
| GST credited to the separate tax account and paid from it | Rs 17,28,000 | No |
| Trade discount allowed by credit note on volume | (Rs 2,10,000) | Deduct |
| Scrap sale credited to miscellaneous income | Rs 6,40,000 | Yes — include |
| Commission paid to selling agents | Rs 3,50,000 | No deduction |
Tax audit turnover = 96,00,000 − 2,10,000 + 6,40,000 = Rs 1,00,30,000. The firm is over the Rs 1 crore limit even though its GST return shows a different figure and its P&L headline sales line is under a crore.
Scrap sales parked in "miscellaneous income" are the single most common reason a borderline assessee turns out to be inside section 44AB. The Guidance Note requires their inclusion whether or not they were credited to the sales account.
Audit checklist
- Build the tax audit turnover from the books, then reconcile to the GST returns — never the other way round.
- Establish whether indirect tax was included in the sale price or routed through a separate tax account; the treatment differs.
- Add back scrap and wastage sitting in miscellaneous income.
- Deduct trade discounts only; leave commission to third parties in.
- Confirm the method of accounting regularly employed, and measure consistently with it.
- Document the reconciliation between the GST aggregate turnover and the tax audit turnover in the working papers.
Common mistakes
- Adopting the GSTR-3B or GSTR-9 outward supply value as the section 44AB figure.
- Deducting selling commission from turnover.
- Leaving scrap sales out because they are in miscellaneous income.
- Removing GST that was never credited to a separate account.
- Using the Companies Act 2(91) figure unchanged for a non-company assessee.