GST input tax credit (ITC) must be reversed when a statutory condition for retaining it is no longer met, or when the credit relates to blocked, exempt, or non-business use. Some reversals are permanent; others—most notably credit reversed because the supplier remains unpaid for 180 days—may be reclaimed after the relevant condition is satisfied. The cause determines the calculation, interest treatment, and GSTR-3B reporting.
First identify why the credit is being reversed
Under the central CGST framework, ITC is conditional, not an unconditional entitlement. A useful starting point is to sort the item into one of these categories:
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- A condition for claiming or retaining ITC has not been met.
- The credit relates to exempt supplies or non-business use and must be apportioned.
- The credit falls within a blocked category or a specific event triggers reversal.
- The reversal is temporary and may be reclaimed after the applicable condition is met.
Do not treat all of these as the same kind of reversal. For example, unpaid-supplier credit may be re-availed after payment, while blocked credit is not made eligible merely by waiting or paying later.
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| Scenario | General treatment | Can it be reclaimed? |
|---|---|---|
| Supplier remains unpaid beyond 180 days | Reverse the portion attributable to the unpaid amount under the prescribed mechanism, with applicable interest. The CGST Act and Rule 37 address this case. | Potentially, after payment and satisfaction of the applicable conditions. |
| Common inputs or services support exempt supplies | Apportion common credit under Rule 42; Rule 43 addresses relevant capital goods. The calculation depends on the prescribed attribution and turnover method. | Not a simple temporary reversal; treatment depends on the applicable period and rule calculations. |
| Credit is blocked under section 17(5) | Do not treat it as eligible ITC, subject to the statutory wording and any applicable exception. | Not ordinarily; an exception may mean the credit was eligible in the first place. |
| Personal use, or goods are lost, destroyed, written off, gifted, or distributed as free samples | Credit may be restricted or ineligible under section 17, depending on the facts and statutory category. | No automatic right to reclaim is established for these cases. |
| Bank capital goods under the specific section 18(6) example | CBIC’s sectoral FAQ says reversal is limited to credit actually availed; where a bank elects the 50% method, the reversal is proportionate to that 50% actually availed. | This is a bank-specific illustration, not a general rule for all taxpayers. |
If you have not paid your supplier within 180 days
Section 16(2) of the CGST Act and Rule 37 address the case where a recipient has availed ITC but has not paid the supplier the value of the supply plus tax within 180 days from the invoice date. The prescribed mechanism adds the relevant credit to output tax liability and applies interest. The Rules’ 180-day mechanics concern the portion that remains unpaid: a partial payment does not automatically make the entire invoice unpaid for this purpose. The cited provision excludes supplies on which tax is payable under reverse charge from this proviso.
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Reconcile invoice balances against actual payment dates and amounts rather than relying only on an accounting system’s “open invoice” status. Keep the invoice, payment evidence, credit amount originally availed, and calculation of the unpaid portion together. Rule 37 provides for re-availment after payment, subject to the applicable conditions.
The cited Rules PDF is a 2022 version, and return forms or procedures may have changed. Check the rule text and return instructions applicable to the tax period before deciding the filing month or workflow.
Exempt supplies and non-business use require apportionment
Section 17 limits ITC to the portion attributable to business use and requires apportionment where inputs or services relate to both taxable and exempt supplies. Credit exclusively attributable to exempt supplies or non-business use is not eligible; common credit is allocated using the prescribed rules.
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Common inputs and input services
Rule 42 sets out the attribution method for common inputs and input services. The cited Rules text includes a 5% attribution for common credit used partly for non-business purposes and a turnover-linked allocation for exempt supplies. These are elements of a prescribed calculation, not a universal percentage to apply to every purchase.
Capital goods
Rule 43 provides a separate approach for relevant capital goods used partly for taxable and partly for exempt or non-business purposes. The cited Rules text uses a five-year useful-life premise for the relevant common capital goods. The appropriate amount depends on the asset, its use, the tax period, and the operative rule; do not substitute a generic estimate for that calculation.
Blocked credits and other ineligible items
Section 17(5) lists categories of blocked credit, with qualifications and exceptions in the statutory text. The cited Act text includes specified motor vehicles and certain food, catering, membership, insurance, personal-consumption, and other categories. Whether a particular expense is blocked depends on the exact category, its use, and any applicable exception; this is not an exhaustive checklist.
The cited section also restricts credit for goods lost, stolen, destroyed, written off, or disposed of by gift or free sample. These are not the same as a temporary reversal for non-payment: paying a supplier later does not, by itself, cure a separate statutory bar.
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Special changes in status and business circumstances
Section 18 addresses specified situations involving changes in registration or tax status and certain business transfers, subject to its conditions. A change of circumstances can therefore require a credit adjustment even if the original credit was claimed when the business was operating normally.
For a specific banking example, CBIC’s sectoral FAQ says a bank’s section 18(6) reversal on capital goods applies only to ITC actually availed. If the bank chose the 50% method, the relevant reversal is proportionate to that 50% actually availed. This narrow example should not be used as a shortcut for a different taxpayer or transaction.
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How to report reversal and reclaim in GSTR-3B
CBIC Circular 170/02/2022-GST distinguishes permanent reversals from temporary reversals that can be reclaimed. Its Table 4 guidance is:
- Table 4(B)(1): permanent reversals and ineligible ITC.
- Table 4(B)(2): temporary reversals that may be reclaimed when the relevant conditions are later satisfied. The circular gives Rule 37 and section 16(2)(b) or (c) as examples.
- Table 4(A)(5): qualifying eligible ITC reclaimed after the condition is met.
- Table 4(D)(1): disclosure of the eligible reclaim.
- Table 4(C): net ITC, calculated in the circular as 4(A) minus 4(B)(1) and 4(B)(2).
These are the circular’s instructions, issued in 2022. Confirm the applicable GSTR-3B instructions and portal behavior for the period you are filing; do not assume older form references or workflow details remain unchanged.
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- Identify the legal reason for each reversal and the tax period to which it relates.
- For unpaid invoices, reconcile amounts paid and unpaid with dates, and calculate only the portion subject to the rule.
- For common-use credit, retain the taxable/exempt and business/non-business attribution supporting the Rule 42 or Rule 43 calculation.
- For a blocked-credit item or special event, document the statutory category and check whether an exception applies.
- Separate permanent ineligibility from a reversal that may later be reclaimed, and preserve evidence supporting any reclaim.
- Check the operative Act, Rules, amendments, notifications, and return instructions for the relevant tax period. The cited CBIC pages and circular include older material, so they do not establish every current deadline, interest rate, or filing detail.
This guide describes the central CGST framework. State or UT GST counterparts, amendments, the supply type, records, and taxpayer-specific facts can affect the result. For a material or disputed credit balance, obtain advice from a qualified Indian GST professional using the invoices, payment records, GSTR-2B and returns, and the relevant period’s law.
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