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Published on: Sep 9, 2026
Rules 42 and 43 of CGST Rules - Input Tax Credit Reversal
Rule 42 and 43 of the CGST rules are crucial for managing the input tax credit (ITC) for supplies used both for business purposes and other purposes. To appropriately claim the input tax credit in such cases, taxpayers must reverse the input tax credit claim if claiming the credit becomes nil. This article dives deep into the details of Rules 42 and 43 of the CGST rules, along with the procedures for reversing the input tax credit claim.
Understanding Rule 42 of CGST Rules
Manner of Determination of Input Tax Credit: Rule 42 addresses the method for determining ITC concerning inputs or input services used both for business and non-business purposes, or for taxable supplies, including zero-rated supplies and exempt supplies.
- Total Input Tax - 'T': Represents the total input tax on inputs and services during a tax period.
- Non-Business Tax - 'T1': Part of 'T' attributable to non-business purposes.
- Exempt Supplies Tax - 'T2': Part of 'T' used for exempt supplies.
- Unavailable Tax Credit - 'T3': Represents credit not available under Section 17(5).
- Eligible Credit - 'C1': Calculated as C1 = T - (T1 + T2 + T3);
For a detailed explanation, visit our Input Tax Credit Overview.
Further down the line, input tax credits intended for supplies that aren't exempt, including zero-rated ones, are denoted as 'T4'. After attribution, the remaining credit, called common credit 'C2', can be calculated by:
C2 = C1 - T4;
This distinction is crucial for understanding the benefits of the CGST regime.
The allocation of credits for exempt supplies, denoted as 'D1', and non-business purposes, denoted as 'D2', involves the following calculations:
- Exempt Supply Credit - 'D1': Calculated using D1 = (E ÷ F) × C2, where 'E' stands for the exempt supplies value, and 'F' denotes the total turnover.
- Non-Business Credit - 'D2': Equal to 5% of C2.
- Business-Purpose Credit - 'C3': Determined using C3 = C2 - (D1 + D2);
Diving into Rule 43 of CGST Rules
Manner of Determination of ITC for Capital Goods: Rule 43 outlines ITC management for capital goods used partly for business and partly for non-business purposes or exempt supplies. Here is how it operates:
- Capital goods used exclusively for producing taxable supplies (including zero-rated) are credited directly to the ledger.
- Common capital goods credit is denoted as 'Tc', representing the aggregate 'A' credited to the ledger.
- Monthly credit on capital goods, 'Tm', is calculated as Tm = Tc ÷ 60;
The allocation of common credit for exempt supplies, 'Te', is also significant:
Te = (E ÷ F) x Tr
For comprehensive guidelines and assistance on ITC, check our complete Input Tax Credit Guide.
Understanding these rules can significantly enhance strategic tax planning and compliance under the GST framework.
By comprehending the nuances of ITC under CGST Rules 42 and 43, businesses and tax professionals can ensure more accurate and advantageous tax calculations.