GST Section 16(4) - ITC Time Limit Rules

What is Section 16(4) of the CGST Act?

Section 16(4) restricts the time within which a registered taxpayer can claim ITC for an invoice or debit note. In simple terms, it sets a legal closing date for claiming credit. Once that date passes, the taxpayer generally cannot claim that credit in a later GSTR-3B.

ITC Deadline Table

Note: This table assumes that GSTR-9 is not filed before 30 November. If the annual return is filed earlier, the annual return filing date becomes the deadline.

How to Calculate the ITC Deadline

Conditions That Must Be Checked Before Claiming ITC

Section 16(4) only decides the time limit for claiming ITC. It does not make a credit eligible by itself. Before claiming ITC, the taxpayer should check whether:

• A valid tax invoice, debit note or prescribed tax-paying document is available.
• Goods or services have been received.
• Supplier details have been furnished and communicated where required.
• The ITC is not restricted under Section 38.
• Tax has been paid to the government.
• GSTR-3B has been filed.
• Blocked credit under Section 17(5) does not apply.

Debit Note ITC Rules Under Section 16(4)

Section 16(4) was amended by the Finance Act 2020, effective from 01.01.2021, to delink the debit note date from the underlying invoice date for ITC time-limit purposes. CBIC Circular 160/16/2021-GST clarified that from 01.01.2021, the date of issuance of the debit note, not the date of the original invoice, determines the relevant financial year for Section 16(4). The ITC time limit for the debit note is calculated separately based on the debit note's financial year.

Debit Note Example

In this example, the debit note belongs to FY 2021-22 because it was issued on 7 July 2021. Therefore, the ITC deadline should be calculated with reference to FY 2021-22, not FY 2020-21.

RCM and Section 16(4)

RCM needs separate treatment because, in some cases, the recipient is responsible for issuing the invoice and paying GST. The relevant financial year for Section 16(4) depends on the document used for claiming ITC.

Where the supplier is unregistered and the recipient is required to issue a self-invoice under Section 31(3)(f), CBIC Circular 211/5/2024-GST clarifies that the relevant financial year for Section 16(4) is the year in which the recipient issues the self-invoice. However, delayed self-invoicing or delayed RCM tax payment can still create interest and penalty exposure.

Import IGST and Bill of Entry ITC

Rule 36 treats a Bill of Entry, or similar customs document prescribed for assessment of IGST on imports, as a valid document for claiming ITC. The application of Section 16(4) to import IGST has seen recent advance ruling activity. 

Some rulings have taken the view that time limits apply to import IGST claimed on the basis of Bill of Entry or the reassessed Bill of Entry. However, advance rulings are generally binding only on the applicant and the concerned officer or jurisdictional officer.

Practical Position for Importers

Importers should treat Bill of Entry ITC as a high-risk area if it is not claimed within the normal Section 16(4) timeline. Maintain a separate import ITC register with:

• Bill of Entry number and date
• IGST paid
• Month in which ITC appears in records
• Month in which ITC is claimed in GSTR-3B
• Reassessment order date, where applicable
• Reason for delay, if any

GSTR-2B, Late Supplier Filing and Section 16(4)

What Businesses Should Do

A common issue is that the buyer has the invoice in their books, but the supplier has not reported it correctly in GSTR-1 or IFF. In such cases, the invoice may not appear in GSTR-2B, which makes ITC risky even if the invoice is genuine. Here is how businesses can handle common GSTR-2B issues:

Businesses using accounting software like BUSY Accounting Software can track purchase invoices, reconcile GSTR-2B, identify missing supplier entries, and follow up before the Section 16(4) deadline gets too close.

180-Day Payment Rule and ITC Re-Availment

The 180-day payment rule is separate from Section 16(4). Under Section 16(2), if a recipient does not pay the supplier the value of the supply plus tax within 180 days from the invoice date, ITC has to be paid or reversed with interest. This rule does not apply to RCM supplies.

Once the recipient later makes payment to the supplier, ITC can be re-availed. Importantly, Rule 37(4) says that the Section 16(4) time limit does not apply to re-availment of credit that was reversed earlier. For instance, in the example given below, the credit should have been validly availed first and then reversed due to non-payment. Re-availment is different from claiming fresh missed ITC.

Example

Section 16(5) and 16(6) Relief

Sections 16(5) and 16(6) were inserted by Finance (No. 2) Act, 2024 with retrospective effect from 01.07.2017. Section 16(5) gives relief for invoices or debit notes pertaining to FY 2017-18, FY 2018-19, FY 2019-20 and FY 2020-21 if ITC was taken in a Section 39 return filed up to 30 November 2021. Section 16(6) gives relief in certain cases where GST registration was cancelled and later revoked, subject to the conditions mentioned in the provision.

For central GST, Notification No. 22/2024-Central Tax is dated 8 October 2024 and allows rectification applications within 6 months from the notification date. Circular 237/31/2024-GST also confirms this process.

When Does the Rectification Process Apply?

• An order under Section 73, 74, 107 or 108 confirmed a demand for wrong ITC due to Section 16(4)
• The ITC is now available under Section 16(5) or 16(6)
• No appeal against that order has been filed
• Application is filed within the prescribed time under Notification 22/2024-Central Tax

Circular 237 also clarifies that where proceedings are pending, or a demand notice has been issued but no order has been passed, the authority should take cognizance of Section 16(5) or 16(6). Relief is not limited only to cases where a final demand order already exists.

No Refund for Already Paid Amounts

Section 150 of Finance (No. 2) Act, 2024 provides that no refund will be given for tax already paid or ITC already reversed because of the retrospective insertion of Section 16(5) and 16(6). CBIC Circular 237 repeats this position.

Consequences of Missing the ITC Deadline

If ITC is not claimed within the Section 16(4) time limit, the business may lose the credit and may also face cash flow pressure, demand proceedings, interest and penalty exposure.

For FY 2024-25 onward, Section 74A applies to determination of tax not paid, short paid, erroneously refunded or ITC wrongly availed or utilised. Earlier periods may fall under Sections 73 or 74, depending on the facts of the case.

Practical Compliance Checklist