GST ITC Time Limit Under Section 16(4), 16(5) & 16(6): Retrospective Relief, Cancelled Registration & Old Demands

GST • Input Tax Credit • Section 16 CGST Act • ITC Limitation • Retrospective Relief • Registration Cancellation

Input tax credit disputes under Section 16(4) of the Central Goods and Services Tax Act, 2017 have generated years of litigation because otherwise genuine credit was denied merely on the ground that it was claimed after the statutory cut-off date. Parliament substantially altered the position through the Finance (No. 2) Act, 2024 by inserting Sections 16(5) and 16(6) retrospectively from 1 July 2017.

The amendments do not abolish Section 16(4). Instead, they create targeted relief for two categories:

specified old financial years—2017-18, 2018-19, 2019-20 and 2020-21—where the relevant return was filed up to 30 November 2021; and
cases where GST registration was cancelled and later revoked, subject to the conditions in Section 16(6).

For businesses facing old demands, pending appeals or registration-cancellation disputes, it is essential to identify which subsection applies, what stage the proceedings have reached, whether the ITC was denied solely because of Section 16(4), and whether a statutory or procedural remedy remains available in 2026.

Quick legal answer

Section 16(4) ordinarily bars ITC after 30 November following the end of the relevant financial year or furnishing of the relevant annual return, whichever is earlier.
Section 16(5) retrospectively protects ITC for FY 2017-18, 2018-19, 2019-20 and 2020-21 if claimed in a Section 39 return filed up to 30 November 2021.
Section 16(6) gives additional time in specified cases where registration was cancelled and later revoked.
Sections 16(5) and 16(6) were inserted retrospectively with effect from 1 July 2017.
The relief does not automatically validate credit that fails other conditions under Section 16, such as absence of invoice, non-receipt of supply or other independent statutory defects.
CBIC Circular No. 237/31/2024-GST directs officers and appellate authorities to take the retrospective amendments into account at different stages of proceedings.
Notification No. 22/2024-Central Tax created a special rectification route for certain concluded orders, but that route was expressly limited to six months from 8 October 2024.
Section 150 of the Finance (No. 2) Act, 2024 provides that no refund is available merely because tax was already paid or ITC reversed before the retrospective amendment.
A demand based only on Section 16(4) may therefore stand on a very different footing from a demand also alleging fake invoices, non-receipt of goods, supplier non-compliance or fraud.

Section 16(4): the ordinary ITC time limit

Section 16(4) is the general limitation provision for taking input tax credit. In its current form, a registered person cannot take ITC in respect of an invoice or debit note after:

30 November following the end of the financial year to which the invoice or debit note pertains; or
the date of furnishing the relevant annual return,

whichever is earlier.

Example: if an invoice pertains to FY 2025-26, the ordinary Section 16(4) cut-off is 30 November 2026, unless the relevant annual return is furnished earlier.

The official text of Section 16 is available on India Code.

Why Section 16(4) created major legacy disputes

In the early GST years, many taxpayers filed returns late because of migration problems, portal difficulties, cancellation of registration, business closure, accounting failures or disputes with suppliers. Where ITC was otherwise supported by invoices and actual business purchases, tax authorities nevertheless raised demands solely because the credit was reflected after the statutory cut-off.

This produced a recurring legal issue: can genuine ITC be denied merely because it was claimed late?

Parliament ultimately addressed a substantial part of the old-year problem through Section 16(5), but only for the four specified financial years and subject to a fixed historical filing date.

Section 16(5): retrospective relief for FY 2017-18 to 2020-21

Section 16(5) overrides Section 16(4) for invoices and debit notes relating to:

FY 2017-18;
FY 2018-19;
FY 2019-20; and
FY 2020-21.

For these years, a registered person is entitled to take ITC in any return under Section 39 that was filed up to 30 November 2021.

This means a credit that was earlier denied solely because the taxpayer crossed the old Section 16(4) cut-off may now be legally protected if the relevant return was filed within the Section 16(5) historical window.

Section 16(5) does not mean every old ITC claim is automatically valid

Section 16(5) cures the time-bar problem under Section 16(4) for the specified years. It does not dispense with the other substantive conditions for ITC.

For example, the department may still examine whether:

the taxpayer possessed a valid tax invoice or prescribed tax-paying document;
goods or services were actually received;
the supply was used or intended for business;
the supplier details were furnished as required by the applicable law;
the transaction was genuine rather than circular or fictitious;
the credit was blocked under Section 17(5);
the taxpayer complied with payment-to-supplier requirements where applicable;
the same credit had already been availed elsewhere.

Therefore, when reviewing an old demand, the first question is: was ITC denied only because of Section 16(4), or were there independent grounds?

Example: pure Section 16(4) demand

Assume a taxpayer claimed otherwise admissible FY 2019-20 ITC in a GSTR-3B filed on 15 October 2021. If the department denied that credit only because the earlier Section 16(4) time limit had expired, Section 16(5) may directly protect the claim because the return was filed before 30 November 2021.

Example: Section 16(4) plus fake-invoice allegation

Assume the same FY 2019-20 credit was denied both because it was allegedly late and because the department alleges that no goods were received.

Section 16(5) can answer the limitation ground, but it does not automatically defeat the separate allegation concerning receipt or genuineness of supply. The taxpayer still needs documentary and factual evidence on the merits.

For supplier-default and buyer-side ITC disputes, see ITC Denied Due to Supplier Default: GST Buyer Rights & Legal Remedies.

Section 16(6): relief where registration was cancelled and later revoked

Section 16(6) deals with a different problem. It applies where:

the registered person’s GST registration was cancelled under Section 29;
the cancellation was subsequently revoked by an order under Section 30 or pursuant to an order of the Appellate Authority, Appellate Tribunal or court; and
the ITC in question was not already restricted by Section 16(4) on the date of the cancellation order.

Where these conditions are satisfied, the person may take the credit in a Section 39 return within the statutory period described in Section 16(6).

What additional time does Section 16(6) provide?

Section 16(6) broadly allows the ITC to be taken within the later of the two statutory windows specified in the provision:

the normal Section 16(4)-type deadline—30 November following the relevant financial year or furnishing of the relevant annual return, whichever is earlier; or
for the period between cancellation/effective cancellation and revocation, a return filed within 30 days from the date of the revocation order.

This is significant because cancellation can prevent filing of returns. Parliament has now expressly recognised that a taxpayer whose cancellation is later undone should not necessarily lose otherwise timely ITC merely because the registration remained disabled during that period.

Important condition: credit must not already have been time-barred when registration was cancelled

Section 16(6) is not a revival mechanism for every ancient credit. The provision requires that the ITC was not already restricted under Section 16(4) on the date of the cancellation order.

Therefore, the chronology must be reconstructed carefully:

date of invoice/debit note;
financial year;
normal Section 16(4) cut-off;
date of registration cancellation;
effective date of cancellation, if different;
date of revocation order;
date on which pending returns were filed.

Retrospective effect from 1 July 2017

Sections 16(5) and 16(6) were inserted by the Finance (No. 2) Act, 2024 with retrospective effect from 1 July 2017.

This retrospective drafting matters because tax authorities, appellate authorities and revisional authorities must apply the amended legal position to proceedings that remain pending, subject to the statutory and procedural framework.

CBIC Circular No. 237/31/2024-GST: how old proceedings are to be handled

CBIC issued Circular No. 237/31/2024-GST dated 15 October 2024 to explain implementation of Sections 16(5) and 16(6).

The Circular distinguishes cases according to procedural stage.

1. Investigation or DRC-01A, but no demand notice yet

Where proceedings have begun and ITC was proposed to be denied under Section 16(4), but no demand notice under Section 73 or 74 has yet been issued, the proper officer is required to take Sections 16(5)/(6) into account before proceeding further.

2. SCN issued, but no adjudication order yet

Where a demand notice has been issued but the adjudicating authority has not yet passed the final order, the authority should apply the retrospective amendments while deciding the case.

3. Adjudication order passed and Section 107 appeal pending

Where the taxpayer has already appealed and the appellate authority has not yet decided the matter, the appellate authority should take Sections 16(5)/(6) into account in the appellate order.

For first-appeal procedure, limitation and pre-deposit, see GST Appeal Under Section 107.

4. Revision under Section 108 pending

If revisional proceedings have been initiated but no revisional order has been passed, the revisional authority should similarly apply the retrospective provisions.

5. Order already passed and no appeal filed

For certain concluded orders under Sections 73, 74, 107 or 108 where no further appeal had been filed, Notification No. 22/2024-Central Tax created a special rectification mechanism under Section 148.

However, this route was not indefinite.

Notification 22/2024: the special rectification window was time-limited

Notification No. 22/2024-Central Tax dated 8 October 2024 prescribed a special procedure for rectification of certain orders where ITC had been denied because of Section 16(4) but became available under Section 16(5) or 16(6).

CBIC Circular 237 specifically states that an eligible rectification application under that special procedure could be filed within six months from the date of the notification.

That means the special Notification 22/2024 filing window was a historical, time-bound remedy. In 2026, a taxpayer should not assume that the special rectification portal/procedure remains available merely because Sections 16(5)/(6) continue to exist.

Where that special window was missed, the availability of any other remedy—appeal, tribunal proceeding, ordinary rectification, writ jurisdiction or other statutory process—depends on the precise order, date, stage and limitation position.

No refund merely because the law was retrospectively relaxed

Section 150 of the Finance (No. 2) Act, 2024 contains an important restriction: no refund is to be made of tax already paid or ITC already reversed merely because Sections 16(5)/(6) were retrospectively inserted.

This creates a distinction between:

a live demand that can still be reduced or eliminated by applying the amended law; and
a payment/reversal already made, where the special no-refund clause may prevent recovery merely on the basis of the retrospective amendment.

A taxpayer considering recovery of an amount already paid should therefore obtain case-specific advice rather than assuming the amendment automatically generates a refund claim.

How to review an old Section 16(4) demand in 2026

A structured review should proceed in the following order.

Step 1: identify the financial year

If the invoices are from FY 2017-18 to FY 2020-21, Section 16(5) may be relevant. Later years remain governed by the normal Section 16(4) rule unless another provision applies.

Step 2: identify the actual return filing date

For Section 16(5), the critical historical date is whether the relevant Section 39 return was filed up to 30 November 2021.

Step 3: read the demand ground precisely

Check whether the department relied:

only on Section 16(4);
on Section 16(4) plus Section 16(2);
on supplier non-filing;
on fake invoices;
on blocked credit under Section 17(5);
on mismatch or duplication;
on cancellation of registration.

Step 4: identify the procedural stage

Is the matter at:

investigation;
DRC-01A;
SCN stage;
adjudication;
Section 107 appeal;
revision;
tribunal stage;
recovery stage;
writ proceedings?

Step 5: identify whether the special rectification window was used

If an eligible final order existed in 2024-25, check whether a Notification 22/2024 rectification application was filed within the prescribed six-month period.

Step 6: reconstruct registration history

Where registration was cancelled and later restored, test the case separately under Section 16(6).

Documents required for a Section 16(5)/(6) defence

invoice-wise ITC ledger;
GSTR-3B filing acknowledgements;
GSTR-2A/GSTR-2B, as applicable;
supplier invoices;
e-way bills, GR/LR and transport records where goods are involved;
purchase orders and contracts;
bank-payment records;
stock register or inward register;
Section 73/74 SCN and annexures;
DRC-01A, if any;
adjudication order;
Section 107 appeal papers, if pending;
registration cancellation order;
revocation order or appellate/court restoration order;
returns filed after revocation;
any rectification application filed under Notification 22/2024.

Do Sections 16(5)/(6) help in a Section 74A proceeding?

Section 74A governs demand determination for FY 2024-25 onward. Section 16(5), by contrast, specifically concerns FY 2017-18 to FY 2020-21. Therefore, the two provisions generally operate in different time periods.

Section 16(6), however, remains relevant to the general ITC framework where registration cancellation and revocation affect timely filing.

For the new demand regime, see Section 74A GST Show Cause Notice: FY 2024-25 Onward.

Section 16(4) versus Rule 86A blocking

These are legally different issues.

Section 16(4) concerns whether ITC was taken within the statutory time limit.
Rule 86A concerns temporary restriction on use of credit where the Commissioner or authorised officer has reasons to believe that credit is fraudulently availed or ineligible on specified grounds.

A taxpayer can therefore have valid, timely ITC that is nevertheless blocked under Rule 86A; conversely, a credit may be unblocked but still fail the Section 16(4) time limit.

See Rule 86A ITC Blocking: GST Legal Remedies.

What should be pleaded in a reply or appeal?

A strong Section 16(5)/(6) argument should be documentary and arithmetic, not rhetorical.

It should ordinarily:

identify invoice-wise credit denied under Section 16(4);
state the relevant financial year;
state the Section 39 return in which credit was taken;
give the actual filing date;
show why Section 16(5) or Section 16(6) applies;
separate credit denied solely for limitation from credit disputed on other grounds;
recompute the tax, interest and penalty after applying the retrospective amendment;
cite Circular 237/31/2024-GST where the proceeding is at a covered stage;
address Section 150 if any amount was already paid or reversed;
seek a speaking order dealing with the retrospective amendment.

Can the department ignore Section 16(5) because the SCN was issued before the amendment?

Where the matter remains pending, that position is difficult to sustain merely because the SCN predates the amendment. Sections 16(5)/(6) were inserted retrospectively, and Circular 237 expressly directs adjudicating and appellate authorities to take them into account in pending proceedings.

The result still depends on whether the taxpayer actually satisfies the amended statutory conditions.

What if the appellate authority already rejected the appeal before the 2024 amendment?

That situation is more complex. Circular 237 and Notification 22/2024 created a special rectification route for specified concluded orders, but the notification imposed a six-month filing period. If that special remedy was not used within time, the taxpayer must examine what other remedy, if any, remains available based on the order date, limitation, tribunal status and constitutional grounds.

There is no safe basis to state that every old appellate order can still be reopened in 2026 simply because Section 16(5) is retrospective.

What if tax was paid under protest?

Section 150’s no-refund language must be considered carefully. The legal consequence may depend on the nature of the payment, whether proceedings remain alive, whether an appeal was filed, and the precise relief sought.

A taxpayer should therefore distinguish between:

seeking deletion of a live demand;
seeking adjustment in a pending appeal;
seeking refund of an amount already finally paid;
seeking restoration of electronic credit.

Common mistakes in Section 16(4) litigation

assuming Section 16(5) applies to every financial year;
ignoring the 30 November 2021 historical filing cut-off;
failing to separate limitation-only denial from substantive ITC defects;
assuming Section 16(6) revives credit that was already time-barred before cancellation;
treating mutation of GST registration status as irrelevant to return-filing chronology;
filing a generic reply without invoice-wise reconciliation;
assuming Notification 22/2024 created a permanent rectification route;
claiming automatic refund despite Section 150 of the Finance (No. 2) Act, 2024;
ignoring a pending Section 107 appeal where the appellate authority can apply the retrospective amendment;
confusing Rule 86A blocking with Section 16(4) eligibility.

Frequently asked questions

What is the current Section 16(4) deadline for ITC?

Ordinarily, ITC cannot be taken after 30 November following the end of the relevant financial year or furnishing of the relevant annual return, whichever is earlier.

Which years get special relief under Section 16(5)?

FY 2017-18, 2018-19, 2019-20 and 2020-21.

What is the filing cut-off under Section 16(5)?

The relevant Section 39 return must have been filed up to 30 November 2021.

Is Section 16(5) retrospective?

Yes. It was inserted with effect from 1 July 2017.

What does Section 16(6) cover?

It provides additional protection in specified cases where registration was cancelled and later revoked, provided the credit was not already restricted by Section 16(4) on the cancellation date.

Can I still file the special Notification 22/2024 rectification application in 2026?

The special procedure was expressly limited to six months from 8 October 2024. It should not be treated as an open-ended 2026 remedy unless a later valid notification or order specifically changes that position.

Can I get refund of ITC already reversed because of Section 16(4)?

Section 150 of the Finance (No. 2) Act, 2024 restricts refunds merely on account of the retrospective Sections 16(5)/(6) amendment. The precise position depends on the procedural posture and nature of relief claimed.

Does Section 16(5) cure fake-invoice allegations?

No. It cures the specified time-limit issue. Independent allegations concerning genuineness, receipt of supply or other statutory conditions still have to be answered.

What if my Section 107 appeal is still pending?

CBIC Circular 237 directs the appellate authority to take the retrospective Sections 16(5)/(6) amendments into account while deciding a pending appeal.

Key takeaways

Section 16(4) remains the general ITC limitation rule.
Section 16(5) gives targeted retrospective relief for FY 2017-18 to 2020-21.
The Section 16(5) return must have been filed up to 30 November 2021.
Section 16(6) protects specified credits affected by cancellation followed by revocation of registration.
The amendments operate retrospectively from 1 July 2017.
Pending authorities must apply the amended law where the statutory conditions are met.
The special Notification 22/2024 rectification mechanism was time-bound.
No-refund restrictions under Section 150 must be checked before seeking recovery of amounts already paid or reversed.
Relief from Section 16(4) does not cure independent defects in ITC eligibility.
Old demands should be reviewed invoice-by-invoice and stage-by-stage before deciding the remedy.

Authoritative legal sources

This article is for general legal and tax information only. It does not constitute solicitation, advertisement, tax advice or an opinion on any specific ITC claim. GST entitlement depends on the exact financial year, invoice, return-filing date, registration status, demand grounds and procedural stage. Current notifications and portal functionality should be checked before filing any remedy.

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