The 180-Day Payment Condition - A Statutory Gatekeeper for Retaining ITC
Input Tax Credit is often described as the lifeline of GST. It ensures a seamless flow of credit, prevents tax cascading, and improves working capital efficiency. However, an important aspect that is sometimes overlooked is that Input Tax Credit is not an unconditional right - it is a statutory benefit subject to prescribed conditions.
Section 16(2) of the CGST Act, 2017, lays down the fundamental conditions for the availment and retention of input tax credit. Among these, one of the most important - and often misunderstood - conditions is contained in the second proviso to Section 16(2).
This proviso introduces what may be called the 180-day payment condition. It provides that where the recipient of goods or services or both fails to make payment to the supplier within 180 days from the date of invoice, the recipient shall be required to reverse the input tax credit already availed. Further, the recipient is also required to pay interest under Section 50 for the period during which such credit remained with him.
In simple terms, the law allows the recipient to avail of input tax credit immediately upon receipt of goods or services or both and upon fulfilment of other conditions. However, the law also requires that the commercial transaction be completed within a reasonable time. If payment of the amount towards the value of the supply, along with tax payable thereon, to the supplier is not made within 180 days, the credit already availed cannot be retained and must be reversed along with interest.
This statutory requirement serves an important purpose. It ensures that input tax credit is not retained without actual payment to suppliers. It promotes financial discipline in business transactions and discourages situations in which credit is extended while payment to vendors is indefinitely delayed. In this manner, the provision safeguards both commercial fairness and the integrity of the GST credit chain.
Although the operational mechanism for reversal and re-availment is prescribed under Rule 37 of the CGST Rules, the substantive legal requirement flows from the second proviso to Section 16(2) itself. The rule merely provides the procedural framework, whereas the statutory provision creates the obligation.
With effect from 01.10.2023, this statutory requirement has also been aligned with the GST return mechanism. Presently, reversal of ITC under this provision is reported in Table 4B (2) of Form GSTR-3B, and re-availment is reflected in Table 4A (5). This has made compliance more structured and transparent.
Thus, what appears to be a simple statutory condition actually carries significant financial implications. Failure to track the 180-day period may result in reversal of credit, payment of interest, and possible disputes during audit or assessment.
In practice, therefore, the second proviso to Section 16(2) operates as a statutory gatekeeper - permitting credit initially but allowing retention only when payment to the supplier is made within the prescribed 180-day period from the date of the invoice.
Scope and Operation of the Second Proviso to Section 16(2)
The second proviso to Section 16(2) sets out the legal consequences when payment to the supplier is not made within the prescribed period of 180 days from the date of the invoice. In such circumstances, the recipient is required to pay an amount equal to the input tax credit availed along with interest under Section 50, in the manner prescribed under Rule 37 of the CGST Rules.
An important aspect of this provision is that it operates proportionately. Where the recipient makes only a partial payment to the supplier within 180 days, reversal of input tax credit is required only to the extent of the unpaid amount. This ensures that the provision operates in a balanced manner and does not result in excessive reversal where part payment has already been made.
The provision applies equally to the supply of goods and services. It also covers situations where payment remains outstanding either wholly or partly. Therefore, taxpayers are required to monitor not only unpaid invoices but also partially paid invoices to determine whether proportionate reversal is required.
At the same time, the law recognises that in certain transactions, payment to the supplier may not be relevant or necessary. Accordingly, specific exclusions have been built into the framework. One such exclusion relates to supplies on which tax is payable under the reverse charge mechanism. In such cases, the recipient himself discharges the tax liability directly to the Government. Since the supplier does not collect tax from the recipient, the condition regarding payment of tax to the supplier is inapplicable.
Another category of exclusion relates to supplies made without consideration under Schedule I . These transactions are treated as deemed supplies under GST even though no payment is involved. For the purpose of the second proviso to Section 16(2), such transactions are treated as deemed payments, and therefore, reversal of input tax credit is not required.
Further, situations may arise where certain amounts that are required to be paid by the supplier are instead incurred by the recipient. Such cases are covered under Section 15(2)(b) of the CGST Act. Even though payment is not made directly to the supplier, such payments are treated as having been made to the supplier for the purposes of the second proviso to Section 16(2). Consequently, input tax credit is not required to be reversed in respect of such amounts.
These exclusions and proportional adjustment principles ensure that the provision operates in a practical and equitable manner, while maintaining consistency with commercial realities and statutory intent.
Rule 37 - Reversal Today, Re-Availment Tomorrow: The Built-In Flexibility in GST
Rule 37 lays down the practical mechanism for implementing the second proviso to Section 16(2). While the Act prescribes the principle that payment must be made to the supplier within 180 days, Rule 37 explains how this requirement is to be complied with in practice.
Under this rule, if a registered person fails to pay the supplier within 180 days from the date of invoice, the input tax credit availed to the extent of the unpaid amount must be reversed. This ensures that credit is retained only when the commercial transaction is actually honoured.
The reversal is not required immediately upon expiry of 180 days, but is to be made while furnishing Form GSTR-3B for the tax period immediately following the expiry of 180 days. Along with such a reversal, interest under Section 50 is also payable.
However, the law also provides important, taxpayer-friendly relief. Once the payment is made to the supplier, the previously reversed input tax credit can be re-availed. This restores the credit chain and ensures that genuine business transactions are not permanently affected by temporary cash-flow constraints.
Significantly, the time limit prescribed under Section 16(4) does not apply to such re-availment. This means that even if payment is made after a substantial delay - beyond the financial year or even beyond the usual ITC time limits - the credit can still be reclaimed.
The Most Critical Question - From Which Date Is Interest Payable?
Among all issues relating to Rule 37 and the second proviso to Section 16(2), one question repeatedly troubles professionals and taxpayers alike: from which date is interest payable if payment to the supplier is not made within 180 days?
The second proviso to Section 16(2) clearly states that interest shall be payable under Section 50 where input tax credit is reversed due to non-payment within 180 days. However, the provision does not explicitly specify the period for which such interest is payable. This silence in the law has led to two different interpretations, resulting in considerable debate among GST professionals.
View 1 - Interest Payable from the Date of Availment (Legally Stronger View)
One widely accepted and legally stronger view is that interest should be payable from the date on which the input tax credit is availed. This interpretation is based on a fundamental principle of GST law - input tax credit is always conditional. When a taxpayer avails of a credit, it is subject to all statutory conditions, including the requirement to make payment to the supplier within 180 days.
Therefore, if the payment is not made within 180 days, the condition attached to the credit stands violated, and the credit becomes ineligible retrospectively. In other words, the credit is treated as irregular from the very beginning, not merely after 180 days.
Consequently, interest should logically be calculated from the date when the credit was originally availed until the date of reversal or actual payment. This interpretation also finds support from the earlier Rule 37(3) , which specifically provided that interest would be payable from the date of availing credit till the date when the amount added to the output tax liability, as mentioned in sub-rule (2), is paid. Although Rule 37(3) has been omitted with effect from 01.10.2022 vide N. No. 19/2022-Central Tax dated 28.09.2022, the liability to pay interest continues under Section 50, and the underlying principle remains relevant.
It may also be noted that courts have consistently held that input tax credit is a statutory benefit and not an absolute right. Where statutory conditions are not fulfilled, such benefit may be denied or restricted. This principle further supports the view that interest should run from the date of availment where credit is conditionally availed.
View 2 - Interest Payable from the 181st Day
Some professionals, however, hold an alternative view. According to this interpretation, input tax credit remains valid for the first 180 days. Only when payment is not made within this period does the credit become irregular. Based on this reasoning, interest should be payable only from the 181st day until the date of reversal or payment.
While this view appears reasonable at first glance, it is comparatively less persuasive from a legal standpoint. This is because input tax credit under GST is not unconditional - it is always subject to compliance with statutory conditions. When a condition is subsequently violated, the credit is treated as ineligible from the date it was availed, not merely from the date of violation.
A Balanced and Practical Conclusion
Considering the statutory framework, earlier Rule 37 provisions, and the conditional nature of input tax credit, the more legally sustainable view is that interest should be computed from the date of availment of the input tax credit until the date of reversal or payment.
Another important practical consideration also supports this interpretation. If interest were to be computed only from the 181st day, the recipient would effectively enjoy the input tax credit for 180 days without any financial consequence. Such an interpretation would dilute the objective of the second proviso to Section 16(2), which seeks to promote timely payment to suppliers. The absence of any financial disincentive during the first 180 days may encourage delayed payments and weaken payment discipline. Therefore, computing interest from the date of availment appears more consistent with the statutory intent and the broader objectives of the GST framework.
This interpretation also aligns with the broader GST philosophy - credit is a benefit, but conditional; and when conditions are not fulfilled, the benefit cannot remain interest-free. Thus, while the issue continues to be debated, the safer and legally stronger approach is to compute interest from the date of availment of ITC, ensuring compliance and avoiding future disputes.
Practical Illustrations
Illustration 1 - Payment Made Within 180 Days
Kirti Ltd. receives goods on 01.01.2025 in respect of a tax invoice dated 01.01.2025 and avails input tax credit on 20 January 2025. The payment to the supplier is made on 15 June 2025. Since the payment is made within 180 days of the invoice date, no ITC reversal is required. There is also no liability to pay interest.In this situation, the credit continues uninterrupted.
Illustration 2 - Payment Made After 180 Days
Kirti Ltd. receives goods on 01.01.2025 in respect of a tax invoice dated 01.01.2025 and avails input tax credit on 20 January 2025. However, payment to the supplier is made on 15 July 2025, which is beyond the 180-day limit.In this case, ITC must be reversed in the return filed for the period following the expiry of 180 days. Interest becomes payable.
According to the Authors' opinion, the interest should be calculated from 20 January 2025, the date of availment, until the date of reversal/payment.This interpretation ensures strict compliance with the ITC's conditional nature.
Illustration 3 - Partial Payment
Kirti Ltd. receives an invoice dated 01.01.2025 for ₹1,00,000 plus GST of ₹18,000. The company pays ₹50,000 within 180 days from the date of the tax invoice and the remaining ₹50,000 after 180 days.In this case, reversal of ITC is required only to the extent of the unpaid amount. Accordingly, ITC of ₹9,000 must be reversed. Interest is also payable on ₹9,000. This illustration demonstrates that reversal must be proportional.
Re-Availment of Credit - Third Proviso to Section 16(2)
The third proviso to Section 16(2) offers relief to taxpayers by stipulating that, upon making payment to the supplier, the recipient is entitled to re-avail the input tax credit. This provision ensures that the reversal is temporary and does not result in a permanent denial of credit. Additionally, the time limit stipulated under Section 16(4) does not apply to such re-availment. This interpretation has been elucidated through Rule 37 and the departmental frequently asked questions (FAQs).
Conclusion - A Small Provision with a Big Message: Ensuring Payment Discipline in GST
The second proviso to Section 16(2) may appear to be a small compliance requirement, but in reality, it plays a very significant role in maintaining financial discipline within the GST framework. This provision effectively links the availability of input tax credit with actual payment to suppliers, thereby aligning tax compliance with genuine commercial transactions.
GST is designed as a seamless credit chain, where one person’s output tax becomes another person’s input tax credit. However, this chain can function smoothly only when payments flow alongside invoices. The second proviso to Section 16(2) ensures exactly this - credit should not be retained unless the payment obligation is honoured.
By requiring the reversal of credit if payment is not made within 180 days, the law discourages businesses from retaining input tax credit indefinitely without paying suppliers . This promotes fair business practices, timely payments, and healthier commercial relationships. In this way, the provision strengthens both financial discipline and business ethics within the GST ecosystem.
Further, considering the statutory provisions, the Rule 37 mechanism, earlier rule position, and practical illustrations, the interpretation that interest should be payable from the date of availment of input tax credit appears legally stronger, logically consistent, and practically safer. This approach also aligns with the principle that input tax credit is conditional and subject to the fulfilment of statutory requirements.
Although this provision is sometimes overlooked in day-to-day compliance, it remains one of the most important and sensitive compliance requirements under GST. A simple delay in payment can lead to credit reversal, interest liability, and additional compliance burden.
Thus, the second proviso to Section 16(2) carries a clear and powerful message -
Input tax credit is not merely a technical entitlement; it is a benefit linked with responsible business conduct and timely payment discipline.
By: CA Raj Jaggi & Adv Kirti Jaggi
CAclubindia
