Eligibility requirements for ITC

Eligibility Requirements for ITC Under GST: Complete FY 2026-27 Guide

To claim Input Tax Credit (ITC) in FY 2026-27, you must simultaneously satisfy five conditions under Section 16(2) of the CGST Act 2017: hold a valid tax invoice, have actually received the goods or services, see the tax reflected in your auto-populated GSTR-2B, have filed your GSTR-3B for that period, and pay the supplier within 180 days of the invoice date. Miss any one condition and the credit is disallowed — or reversed with interest. This guide walks through every condition, the exact rules that enforce them, and the workflows that protect your margin.

Why ITC Tightened So Sharply in Recent Years

ITC fraud through fake invoices and missing-supplier chains cost the exchequer thousands of crores annually. CBIC's legislative response has been systematic: Section 16(2)(aa) (Finance Act 2021, effective 1 January 2022) made GSTR-2B matching a statutory precondition. Rule 36(4) eliminated the earlier 5% provisional credit buffer, capping ITC strictly at what appears in GSTR-2B. Rule 88C introduced system-generated mismatch intimations that convert excess claims into automatic demand proceedings. The net effect in FY 2026-27: ITC is no longer an entitlement that flows from possessing an invoice — it is a privilege earned through clean documentation, timely vendor compliance, and disciplined reconciliation.

For a finance head managing a Rs. 5 crore monthly purchase bill at 18% GST, Rs. 90 lakh of ITC is at stake every month. A 5% slippage — from unreconciled invoices, blocked categories, or missed deadlines — translates to Rs. 4.5 lakh of real cash lost per month. The controls are worth the effort.

The Five Statutory Preconditions Under Section 16(2) CGST

Condition 1: Possess a Valid Tax Document

You must hold a tax invoice, debit note, bill of entry (for imports), or another document prescribed under Rule 36 of the CGST Rules 2017. The invoice must comply with the mandatory fields under Rule 46: GSTIN of supplier and recipient, HSN/SAC code, taxable value, tax rate, and tax amount broken into CGST, SGST/UTGST or IGST.

A proforma invoice, a purchase order, or an internal voucher does not qualify. Where a supplier issues a consolidated bill or a bill of supply (under the composition scheme or for exempt supplies), no ITC arises regardless of what you have paid. If your supplier is unregistered and the supply is liable to Reverse Charge Mechanism (RCM), you must self-invoice under Rule 47A and pay tax on a self-assessed basis — that self-assessed payment then qualifies as your ITC document.

Condition 2: Actual Receipt of Goods or Services

Section 16(2)(b) requires that you have actually received the goods or services. For goods, this means physical delivery — mere paper entries or book-to-book transfers fail this test. For services, it means the service has been rendered, not merely contracted. Under the deemed-receipt rule in the proviso to Section 16(2), goods delivered to a third party on your direction also qualify, provided the delivery is documented.

This condition is the primary target in GST audit scrutiny. If stock-in-transit records, lorry receipts, or service-completion certificates do not support the invoice date, the department can deny ITC even when the invoice and GSTR-2B entry exist. Always ensure your goods receipt note (GRN) date aligns with the invoice period.

Condition 3: Tax Reflected in GSTR-2B — Section 16(2)(aa)

Added by the Finance Act 2021, this condition makes GSTR-2B the statutory gate for ITC. Your supplier must have furnished the invoice details in their outward supply return (GSTR-1 or IFF), and those details must appear in your auto-populated GSTR-2B for the relevant tax period.

GSTR-2B is generated on the 14th of each month based on your suppliers' GSTR-1 filed up to the 13th. If your supplier files GSTR-1 late — or files it with an error in your GSTIN — the invoice will not appear in your GSTR-2B, and you cannot claim ITC for that month regardless of how perfect your own records are. This single condition transfers substantial compliance risk to your vendor ecosystem.

Condition 4: File Your GSTR-3B for the Relevant Period

Section 16(2)(c) requires that the return for the period in which ITC is claimed must have been filed. This is an ongoing precondition: if you suspend GSTR-3B filing (due to a bank account linking issue, for example), ITC claimed in unfiled returns becomes ineligible. Courts have generally been strict — the statutory language requires filing, not merely preparation.

Condition 5: Pay the Supplier Within 180 Days of Invoice Date

The proviso to Section 16(2) reads plainly: if you fail to pay the supplier — whether the invoice value or any portion of it — within 180 days from the invoice date, the ITC attributable to the unpaid amount must be reversed along with interest.

The 180-day clock runs from the invoice date, not the payment due date in the purchase contract. Interest accrues under Section 50(1) at 18% per annum from the date the ITC was originally availed.

Once you make the payment (even after 180 days), you can re-avail the reversed ITC in the GSTR-3B of the period in which payment is made. The re-availing right does not lapse — but the interest cost does not get refunded.

Rule 36(4): Why GSTR-2B is Your Absolute ITC Ceiling

Rule 36(4) states that ITC on invoices not reflecting in GSTR-2B cannot be claimed at all. The earlier notification-based regime allowed 5% provisional credit over GSTR-2B — that buffer was withdrawn effective 1 January 2022 and has not been reinstated for FY 2026-27.

In practical terms: if GSTR-2B shows eligible ITC of Rs. 8,00,000 for April 2026 but your purchase register shows Rs. 9,20,000 in eligible invoices, you may claim only Rs. 8,00,000 in your April 2026 GSTR-3B. The remaining Rs. 1,20,000 can be claimed only when — and if — the missing invoices surface in a subsequent GSTR-2B.

This rule places real pressure on procurement and accounts payable teams. Vendor scorecards should track GSTR-1 filing punctuality alongside commercial metrics like delivery lead time and pricing.

Section 17(5): Blocked Credits You Cannot Claim

Section 17(5) is an absolute bar — the credits listed here are ineligible regardless of how well you satisfy Section 16(2). The categories as they stand in FY 2026-27:

• Motor vehicles for passenger transportation — cars, SUVs, buses with seating capacity below 13 persons. Exception: when used for the same taxable activity (e.g., a driving school, a rent-a-car business, or transportation of employees where such transportation is a legal obligation).
• Vessels and aircraft — same logic, with exceptions for the same line of business.
• Insurance, servicing, repair and maintenance of the above vehicles/vessels/aircraft — blocked if the underlying asset is blocked.
• Food and beverages, outdoor catering, beauty treatment, health services, cosmetic and plastic surgery, club memberships, fitness centres, and life and health insurance — blocked unless the same category is your outward supply, or the benefit is a statutory obligation (e.g., a canteen mandated under the Factories Act 1948).
• Travel benefits to employees on leave — LTC, vacation packages.
• Works contract services for construction of immovable property on own account — blocked, unless the property is plant and machinery.
• Goods or services for construction of immovable property on own account — capitalised civil construction. The Supreme Court in Safari Retreats examined the plant-and-machinery exception, but the basic block on immovable property remains.
• Goods or services used for personal consumption — CCTV in a director's residence, housekeeping at a personal property.
• Goods lost, stolen, destroyed, written off, or given away as gifts or free samples — the ITC must be reversed when these events occur.
• Tax paid under Sections 74 (fraud/suppression), 129 (detention and seizure), and 130 (confiscation) — no ITC on penalty taxes.

A common audit flashpoint: company-leased cars for executives. The department routinely disallows ITC on these unless the company can demonstrate the vehicle falls within an exception. If you are claiming ITC on a company car, prepare a detailed justification with reference to the specific exception.

The ITC Deadline You Cannot Miss: Section 16(4)

Section 16(4) fixes a hard outer limit for claiming ITC on any invoice or debit note of a financial year: the earlier of (a) 30 November of the following financial year, or (b) the date of filing the annual return (GSTR-9) for that year.

There is no condonation provision under the CGST Act for a missed Section 16(4) deadline. Courts have consistently held this is a mandatory, not directory, condition. If you file GSTR-9 for FY 2025-26 in October 2026 and there is an unclaimed ITC invoice from January 2026, the deadline collapses to October 2026 — not November 2026.

Implication for mid-year acquisitions or demergers: if your entity took over a business in August 2026 and inherited purchase invoices dated April 2025, those April 2025 invoices are already outside the FY 2025-26 deadline window unless they were captured in a timely GSTR-3B by the transferor.

Worked Example: ITC Eligibility, Reversal and Re-Availing

Facts: Techform Pvt. Ltd. receives a services invoice from a vendor dated 1 May 2026, invoice value Rs. 5,00,000, GST @ 18% = Rs. 90,000. Techform avails ITC of Rs. 90,000 in its May 2026 GSTR-3B filed on 20 June 2026.

Scenario A — Payment made within 180 days. Techform pays the vendor on 10 October 2026. The 180-day window from 1 May 2026 closes on 28 October 2026. Payment is made before that date. ITC of Rs. 90,000 is fully protected. No reversal required.

Scenario B — Payment not made within 180 days. Techform has a cash-flow crunch and pays only on 15 December 2026 — 228 days after the invoice date. The 180-day window expired on 28 October 2026.

• Reversal required: Rs. 90,000 ITC must be reversed in the October 2026 GSTR-3B (the period in which the deadline lapses).
• Interest at 18% p.a.: From the date of original availing (June 2026) to the date of reversal (say, 20 November 2026 GSTR-3B filing for October) = approximately 153 days.
• Interest = Rs. 90,000 × 18% × 153/365 = Rs. 6,807 approximately.
• Re-availing on payment: When Techform pays on 15 December 2026, it can re-avail Rs. 90,000 in its December 2026 GSTR-3B. The interest of Rs. 6,807 is a sunk cost — it does not get refunded.

Net cost of the delay: Rs. 6,807 in interest — plus the working-capital cost of the reversed ITC sitting blocked for six weeks.

Proportionate Reversal Under Rules 42 and 43

If your business makes both taxable and exempt supplies — for example, a company that supplies taxable manufactured goods and also earns exempt interest income from inter-company loans — you cannot claim 100% of ITC on common inputs.

Rule 42 governs inputs and input services. The formula:

Reversal = (Common ITC) × (Exempt + Non-business Turnover) ÷ Total Turnover

Example: A trading company has total ITC for April 2026 of Rs. 12,00,000. Of this, Rs. 8,00,000 is attributable to common inputs used for both its taxable trading business and its exempt dividend income activity. Taxable turnover = Rs. 48,00,000; exempt turnover = Rs. 12,00,000; total = Rs. 60,00,000.

• Exempt ratio = 12/60 = 20%
• Reversal on common credit = Rs. 8,00,000 × 20% = Rs. 1,60,000
• Net ITC available = Rs. 12,00,000 − Rs. 1,60,000 = Rs. 10,40,000

This monthly reversal is provisional; a final annual reconciliation under Rule 42 is done based on actual annual turnover figures, with any adjustment reflected in the GSTR-3B for September of the following year.

Rule 43 applies the same logic to capital goods over the useful life of five years (60 months), reversing 1/60th of the blocked portion each month.

Rule 88C Mismatch Notices: How the System Catches You

Rule 88C (introduced by Notification No. 26/2022-CT) empowers the GST system to issue a DRC-01C intimation automatically when GSTR-3B ITC claimed exceeds GSTR-2B eligible ITC by more than the prescribed threshold for a tax period.

On receiving a DRC-01C notice, you must:

1. Log in to the GST portal within 7 days of the intimation.
2. File a reply in Form DRC-01C Part B — either (a) accepting the excess and paying it with interest, or (b) providing a reason for the difference.
3. Acceptable reasons include: ITC relating to RCM (which you pay yourself and appears in GSTR-2B as a credit), ITC on imports reflected in the Bill of Entry but not in vendor GSTR-2B, or a documented reconciling item you are pursuing with the vendor.

If you do not respond within 7 days, the GST portal blocks your ability to file the next GSTR-3B, effectively creating a hard stop on your compliance cycle. Non-response also signals to the department that the excess claim was without basis, increasing audit exposure.

Key practical point: run your GSTR-2B reconciliation before filing GSTR-3B, not after. DRC-01C notices are generated because taxpayers file GSTR-3B with unchecked ITC figures. A 30-minute monthly reconciliation eliminates almost all DRC-01C exposure.

Common Mistakes That Cause ITC Denials

1. Claiming ITC on a supplier who has filed under the composition scheme. Composition dealers issue a Bill of Supply, not a Tax Invoice. No ITC flows to you from a composition supplier — ever.

2. Accepting an invoice with a wrong GSTIN. If your supplier keys in your GSTIN incorrectly on their GSTR-1, the invoice will not appear in your GSTR-2B. You cannot claim the ITC until the supplier amends the return. Always validate GST invoices at the moment of receipt.

3. Capitalising goods but not separating the ITC claim. When goods are used partly for capital formation and partly as inputs, many businesses either claim full ITC or none. The correct approach is to apportion and claim under Rule 43 for capital goods and Rule 42 for inputs.

4. Missing the 16(4) deadline on amended or supplementary invoices. A vendor issues a credit note in March 2027 for an original invoice from April 2025. The debit note or revised invoice falls in FY 2026-27; the original invoice is outside the Section 16(4) window. Understand which year an amendment relates to before booking ITC.

5. Treating RCM tax as a cost without re-availing ITC. Where RCM applies — imports of services, legal fees, freight under GTA — you pay IGST/CGST+SGST from your cash ledger. That tax is immediately eligible as ITC in the same month's GSTR-3B (subject to Section 17(5)). Many smaller businesses pay RCM and forget to re-avail, permanently inflating their input cost.

6. Not reversing ITC on goods written off. When you write off damaged stock or destroy expired goods, Section 17(5)(h) requires reversal of the ITC attributable to those goods. This is frequently missed in stock-taking adjustments.

Monthly AP Workflow to Protect Every Rupee of ITC

Follow this sequence every month before the GSTR-3B due date (20th for monthly filers, or the applicable quarterly date):

1. By 14th of the month: Download GSTR-2B from the GST portal.
2. By 16th: Export your purchase register (invoices dated in the preceding month) from your accounting software. Run a three-way match: GSTIN ✓, invoice number ✓, tax amount ✓.
3. Categorise mismatches:
4. In GSTR-2B, not in your books: Verify with vendor; post the invoice if legitimate; query if unexpected.
5. In your books, not in GSTR-2B: Do not claim ITC. Send a GSTR-1 amendment request to the vendor immediately. Track on your vendor compliance dashboard.
6. Check Section 17(5) blocked categories: Flag any invoices for food, health services, vehicles or construction before posting ITC.
7. Apply Rule 42 provisional reversal if your entity has exempt income.
8. Review 180-day payment tracker: Identify invoices dated more than 150 days ago with outstanding balances. Escalate to treasury before the window closes.
9. File GSTR-3B by 20th with reconciled, not estimated, ITC figures.

Vendors who repeatedly fail to file GSTR-1 on time are costing you real money. Build a quarterly vendor review into your procurement calendar — three consecutive late filings should trigger a commercial conversation about payment terms or vendor replacement.

Key Takeaways

• All five Section 16(2) conditions must be satisfied simultaneously — a valid invoice plus actual receipt plus GSTR-2B match plus GSTR-3B filing plus 180-day supplier payment. Failing any one disallows the credit.
• GSTR-2B is your ITC ceiling, not your purchase register. Rule 36(4) allows no provisional claim above what GSTR-2B shows. Vendor GSTR-1 compliance is your compliance.
• Section 17(5) is an absolute block — motor vehicles for passengers, food and catering, construction of immovable property on own account, and personal consumption items cannot generate ITC under any circumstances (outside narrow exceptions).
• The Section 16(4) deadline is unforgiving: for FY 2025-26 invoices, the outer limit is 30 November 2026 or the date of GSTR-9 filing, whichever is earlier. Miss it and the credit is permanently lost.
• 180-day non-payment triggers reversal plus 18% interest from the date of original availing. Re-availing is permitted on belated payment, but the interest is a permanent cost.
• Rule 88C DRC-01C notices must be responded to within 7 days on the GST portal; non-response blocks your next GSTR-3B filing and increases audit risk.
• A monthly pre-filing reconciliation — GSTR-2B vs purchase register, 180-day tracker, blocked-credit flag — is not optional overhead; it is the single most effective control to convert your GST compliance function into a working-capital asset rather than a source of leakage.