ITC Reversal After 180 Days: GST Rule You Can't Ignore

One of the primary benefits of registered taxpayers under GST is their ability to claim Input Tax Credit (ITC) but businesses frequently overlook an important rule: any input tax credit claimed will need to be reversed if they do not pay their supplier within the 180-day timeframe after receipt of the invoice. If the recipient of the goods does not pay the supplier (including tax) in that time frame, they must reverse their ITC claimed and also pay interest. Once payment of the invoice is made... the recipient may re-claim their original input tax credit.

Legal Provision Behind ITC Reversal

The 180-day time limit for using the ITC for 180 days is prescribed by:

CGST Act, 2017, Section 16(2)
CGST Rules, 2017, Rule 37

Under Section 16(2) of the CGST Act of 2017, a main requirement in getting an ITC is that the recipient must pay all amounts owed for the supply including taxes no later than 180 days after the invoice date; Furthermore, Rule 37 of the CGST Rules gives specific instructions for how to reverse those amounts if they are not paid within 180 days of the invoice date, specifically stating that once the 180 days have expired without payment, the following will take place:

The amount of ITC that has been received must be returned to the liability to the output tax.
Interest must also be paid in accordance with Section 50 of the Act; and,
The GST return must be prepared and filed in accordance with the applicable guidelines established for the completion of a GST return (GST3B) and the applicable timing for the completion of a GST return.

Therefore, under this law:

In the event of a recipient not remitting to the supplier (for GST) within one hundred and eighty (180) days from the date of the invoice, the ITC that has been claimed will be reversed to the extent to which there is an applicable interest amount charged.

Refer this: Post-Factum GST Cancellation - Why ITC Cannot Be Denied

When Does ITC Reversal Apply

The ITC reversing rule applies to businesses when:

A company makes late payment to the supplier within 180 days after the date of invoice
Partial payments to the supplier are required to be reversed based on what is unpaid by supplier
If GST is still due from you but taxable price on the invoice has already been paid
The recipient has claimed ITC on their GSTR-3B return but has not met their payment obligation for this supply
Outstanding balances persisted beyond 180 days in the company records without any valid offset (credit notes are considered a valid offset).

Please note :

This rule applies to taxable supplies (tax charged) and inward supplies where ITC was deducted or claimed.
Provides for normal transactions under the forward charge mechanism.
If no possible ITC deductions exist, no action can be taken until after the 180 day denial period (when ITC was not claimed).

How Is the 180 Days Calculated

180 Days is calculated from the invoice date.
180 Days does not begin from the due date of payment.
180 Days will also not begin from the date of receipt of goods/services.

Interest on ITC Reversal

Interest is payable when an ITC reversal is due to non-payment under Section 50 of the CGST Act. The interest will be calculated for ALL days between the date of availing an ITC to the date of reversing it. So if you are not keeping an eye on your progress, it can cost you a lot of money in delays.

Can Reversed ITC Be Reclaimed

Yes. When a taxpayer has made a payment to a supplier with respect to goods or services supplied, including GST, then he/she is entitled to:

Reclaim the reversed ITCs
No time limit limitations exist, other than the general time limits imposed on claiming ITCs

Thus, they can never totally lose the credit.

Specific Circumstances When the 180-Day Limit Does NOT Apply To Reversed ITCS

In some instances the reverse ITC reversal rules do NOT apply. Typically this includes:

Goods or services received in supply that are subject to the "Reverse Charge Mechanism"
Goods or services received without having paid any cash in consideration as outlined in Schedule I of the GST Act
Goods imported
Certain deemed supplies.

Understanding these exclusions can help taxpayers avoid any reversals they may have incurred inadvertently.

Refer here: Interest on ITC Reversal, Excess ITC Claimed

Practical Example

Let us take the below scenario:

An invoice for supply from a vendor is dated 1 January 2025 and received by the company.
The company claims ITC of Rs. 1,00,000 in its GSTR-3B return for January 2025.
The company makes, however, the payment to the vendor (including the GST amount) only on 30 July 2025, which is beyond the stipulated time frame of 180 days from the invoice date.

Then:

On June 29th, 2025, the last day, the ITC will still be the ITC for this event. The company will have to furnish an ITC of Rs 1,00,000 in either its GSTR-3B return for either June 2025 or July 2025, depending on when the Company learns about the non-payment.
Interest under section 50 of The CGST Act will accrue from:

The date that that the taxpayer availed of the ITC (January 2025)
Until such time that the ITC is reversed.

The reversal must be reported in table 4 (B) of the GSTR-3B.

Once the complete payment is made (including GST) on July 30, 2025:

The taxpayer is allowed to reclaim the ITC that was reversed.
The taxpayer can take the reclaimed ITC in that taxpayer's return for the month that they made the payment.
No interest will be accrued to the taxpayer when claiming the reclaimed ITC.

What is the Process to Display the ITC Reversal in Your GST Returns

To report an ITC reversal:

You will report an ITC reversal in both GSTR-3B and Table 4(B) of your GSTR-3B.
Reporting an ITC reversal correctly avoids compliance issues, notices and any other compliance problems.

Some of the most common mistakes businesses make are:

No tracking past 180 days of creditor aging.
Ignoring any partial payments.
Interest is not calculated correctly.
Forgetting to claim ITC after payment.
Mixing RCM Supply Items with normal supply items.

ITC Reversal – Compliance & Reporting Summary

Compliance Aspect	Requirement	Practical Impact on Taxpayer
Legal Provision	Section 16(2) of CGST Act & Rule 37	Mandatory reversal if payment not made within 180 days
Trigger Point	Non-payment to supplier (including GST portion)	Aging of creditors must be monitored
Reporting in Return	Table 4(B)(2) of GSTR-3B	ITC reversed in the month when 180 days expire
Interest Liability	Section 50 of CGST Act	Interest payable from date of ITC availment till reversal
Mode of Payment of Interest	Cash Ledger only	Cannot use ITC to pay interest
Reclaim of ITC	Allowed after full payment to supplier	Credit can be re-availed in the month of payment
Documentation Required	Invoice copy, payment proof, reconciliation report	Important during GST audit or scrutiny
Audit Risk	High if ignored	May lead to GST notices and penalty exposure

Conclusion

Under the Goods and Services Tax law, the 180-day rule for ITC Reversal is a regulatory requirement that businesses must adhere to. If you do not pay your vendor within 180 days, you will need to reverse any ITC that you may have received on that purchase, as well as pay any applicable interest on the amount of ITC claimed. Once you pay your vendor, you may reclaim the ITC that had been reversed. Therefore, it is important to monitor your vendor accounts to ensure you never incur unnecessary interest and or compliance issues.