Legal Reference
Section 37 (GST deductible business expense), Section 44AD/44ADA turnover definition (excluding GST), GSTR-3B vs ITR reconciliation, Section 162 audit threshold, ITA 2025
1. GST and Income Tax: Different Systems, Same Taxpayer
GST and income tax are two separate tax systems with different bases: GST is on consumption (transactions), income tax is on profits (income). However, they interact significantly for businesses — particularly around turnover definitions, deductibility of GST costs, and the risk of department comparing GSTR data with ITR data.
2. GST Collected is NOT Income
GST collected from customers is a liability — it belongs to the government, not to the business. It must NOT be included in business income. Business receipts for income tax = Gross receipts EXCLUDING GST collected. GSTR-1/GSTR-3B turnover includes GST; ITR turnover should EXCLUDE GST collected. Always maintain a reconciliation statement showing GST turnover vs net turnover.
3. GST Input Credit: Also NOT Income
GST input tax credit (ITC) is a reduction in GST liability — not income. ITC should not be included in income in the ITR. However, if ITC was claimed and later reversed (due to non-payment to vendor, blocked credits etc.), the reversal amount is NOT a deductible expense for income tax either.
4. GST Paid is Deductible Under Section 37
GST paid on business inputs (purchases, services) where ITC is NOT available (blocked credits — like GST on personal use assets, food, vehicles for personal use) is deductible as a business expense under Section 37. Similarly, GST paid on exempt supplies where ITC is reversed is deductible as a cost. GST where ITC is claimed is NOT deductible — you would be double-counting.
5. Section 44AD/44ADA Turnover: Excluding GST
The Rs 3 crore limit for Section 44AD and Rs 75 lakh limit for Section 44ADA are based on gross professional receipts EXCLUDING GST collected. So a consultant billing Rs 75 lakh + 18% GST = Rs 88.5 lakh total invoices — their Section 44ADA limit comparison is Rs 75 lakh (ex-GST), which is within the limit. This distinction is important for determining eligibility.
6. GSTR Vs ITR Mismatch: Department Notices
The IT Department compares GSTR-3B/GSTR-9 annual turnover with income declared in ITR. Significant differences generate notices. Common legitimate differences: GST turnover includes exempt supplies not in ITR income; GST includes branch transfers; timing differences. Always maintain a written reconciliation statement explaining the difference — this is the first document an AO will ask for.
7. Tax Audit Threshold: GST-Inclusive or Exclusive?
The Section 162 tax audit threshold (Rs 1 crore for non-digital, Rs 10 crore for 95%+ digital) is based on turnover excluding GST collected. This has been clarified by CBDT. So a trader with Rs 9.5 crore net turnover (ex-GST) but Rs 11 crore GST-inclusive billing does NOT cross the Rs 10 crore audit threshold.
8. Why TaxClue
GST-IT reconciliation is increasingly scrutinised. TaxClue maintains reconciliation statements and explains differences in ITR. Contact us for GST-IT compliance under ITA 2025.
Disclaimer
This article is for general informational and educational purposes only. It does not constitute legal, financial, or professional tax advice. Readers are advised to consult a qualified Chartered Accountant or tax professional before making any decisions. TaxClue Consultech Pvt Ltd accepts no liability. All case studies and examples in this article are illustrative only and do not represent actual persons or transactions.
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❓ Frequently Asked Questions
Is GST collected from customers included in income?
No. GST collected from customers is a liability — it belongs to the government and must be remitted to the government. It is NOT part of the business income. For income tax purposes, business turnover and income are computed excluding GST collected. A business with Rs 1 crore net sales + Rs 18 lakh GST collected reports Rs 1 crore as income (not Rs 1.18 crore).
Can GST paid be deducted as a business expense?
GST paid on business inputs is deductible under Section 37 of ITA 2025 only when input tax credit (ITC) is NOT available for that GST amount. If ITC is claimed, the GST is not an expense (it is a credit). If ITC is blocked (for personal use assets, food, beverages) or if the taxpayer is in an exempt/composition scheme and cannot claim ITC, the GST paid is an additional cost and fully deductible.
Does the Section 44AD Rs 3 crore limit include GST?
No. The Rs 3 crore turnover limit for Section 44AD (Rs 2 crore for non-digital) and Rs 75 lakh for Section 44ADA are based on gross receipts excluding GST collected. CBDT has clarified this. So a consultant with Rs 70 lakh net receipts + Rs 12.6 lakh GST collected (= Rs 82.6 lakh invoiced) has gross receipts of Rs 70 lakh for 44ADA purposes — well within the Rs 75 lakh limit.
Why does GSTR turnover differ from ITR income?
Common reasons: GSTR includes GST collected (ITR excludes it); GSTR includes exempt supply turnover (not taxable income); GSTR includes stock transfers/branch transfers; timing differences (advance receipts in GST vs income recognition). Always prepare a written reconciliation showing the difference. The IT Department compares GSTR-9 annual turnover with ITR income — any unexplained difference generates a scrutiny notice.
What is the tax audit threshold — GST inclusive or exclusive?
The tax audit threshold under Section 162 of ITA 2025 — Rs 1 crore (non-digital) and Rs 10 crore (95%+ digital) — is based on net turnover excluding GST collected. A business with Rs 9.5 crore net turnover and Rs 1.71 crore GST (total invoicing Rs 11.21 crore) does NOT cross the Rs 10 crore audit threshold if 95%+ transactions are digital. This CBDT clarification prevents GST-inflated turnover from triggering unnecessary audit obligations.
