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Guide · GST

GST Input Tax Credit Rules — Claim It, Don't Lose It

The Section 16 conditions to claim ITC, blocked credits under Section 17(5), the 30 November time limit, GSTR-2B matching and the 180-day reversal rule — in plain English.

Written by
TaxClue Editorial Desk
Updated
18 August 2026
Reading time
6 min
Questions
16 answered
  • Updated August 2026
  • GST Expert Reviewed
  • Section 16 & 17(5)
Quick Answer

You can claim Input Tax Credit (ITC) on GST paid on inputs, input services and capital goods used for business — but only if all Section 16 conditions are met: a valid tax invoice, goods/services actually received, the invoice reflected in your GSTR-2B, and your own GSTR-3B filed. ITC must be claimed by the earlier of 30 November of the next financial year or the date of filing the annual return (GSTR-9). Certain expenses are blocked under Section 17(5), and unpaid supplier invoices must be reversed after 180 days.

Section 16

ITC Eligibility Conditions

ITC is available only when every condition in Section 16 of the CGST Act is satisfied. Fail any one and the credit is not admissible — even if GST was genuinely paid.

ConditionRequirementSection / Rule
Valid tax documentHold a tax invoice or debit note from a registered supplierSec 16(2)(a)
Reflected in GSTR-2BInvoice must appear in your auto-drafted GSTR-2BSec 16(2)(aa) · Rule 36(4)
Goods / services receivedYou must actually have received the supply (last lot, for staggered goods)Sec 16(2)(b)
Tax paid to governmentSupplier must have paid the GST to the exchequerSec 16(2)(c)
Own return filedYou must have filed your GSTR-3B for the periodSec 16(2)(d)
Business useInput must be used or intended for business, not personal useSec 16(1)
Within time limitClaimed by 30 Nov of next FY or GSTR-9 date, whichever is earlierSec 16(4)

Do not claim ITC from physical invoices alone — GSTR-2B is the controlling document under Rule 36(4).

No GSTR-2B entry, no ITC

If your supplier has not filed GSTR-1/IFF, the invoice will not appear in your GSTR-2B and the credit is blocked under Section 16(2)(aa) — regardless of whether you hold the invoice and have paid the supplier. Chase non-filing vendors before your 30 November deadline.

The document trail

How ITC Flows — GSTR-1 → GSTR-2B → GSTR-3B

ITC in GST follows a document trail. Your supplier files GSTR-1, the data auto-populates your GSTR-2B (a static statement generated monthly), and you then claim the eligible amount in Table 4 of your GSTR-3B.

  1. 1Supplier files GSTR-1Outward invoices uploaded
  2. 2Your GSTR-2BAuto-drafted, static ITC statement
  3. 3You claim in GSTR-3BTable 4 — eligible ITC
  4. 4Credit ledgerITC credited, set off against output tax

GSTR-2B is static (frozen after generation), while GSTR-2A is dynamic and keeps updating. For claiming ITC, GSTR-2B is the controlling document as per Rule 36(4). Reverse any blocked or ineligible portion in Table 4(B) before the net credit hits your Electronic Credit Ledger.

GSTR-2B not matching your books? Get your ITC reconciled before the deadline.

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Section 17(5)

Blocked Credits — What You Cannot Claim

Section 17(5) lists categories where ITC is blocked even though GST was paid. This tax becomes a permanent cost to the business. Some categories have narrow exceptions.

CategoryBlocked UnderITC Allowed If
Motor vehicles (cars, two-wheelers, aircraft, vessels)17(5)(a)Further supply of vehicles, passenger transport, driving training, or goods transport
Food, beverages, outdoor catering17(5)(b)(i)You make an outward taxable supply of the same category
Beauty treatment, health services, cosmetic surgery17(5)(b)(i)Same outward taxable supply
Club, health & fitness centre membership17(5)(b)(ii)Always blocked
Rent-a-cab, life & health insurance17(5)(b)(i)Obligatory under law for employees, or same outward supply
Works contract for immovable property17(5)(c)It is plant & machinery
Goods/services for own construction of immovable property17(5)(d)It is plant & machinery
Goods lost, stolen, destroyed, written off, free samples17(5)(h)Always blocked
Gifts to a person exceeding value threshold17(5)(h)Blocked
Tax paid under Sec 74 (fraud), 129, 13017(5)(i)Always blocked

Sec 17(5)(b) exceptions apply where the inward supply is used to make an outward taxable supply of the same category, or where providing it to employees is obligatory under any law in force.

Company car and staff-canteen trap

A car used for MD/HR/general corporate travel is blocked under 17(5)(a); a delivery truck or a taxi-fleet vehicle is allowed. Similarly, employee canteen food is blocked unless providing it is obligatory under a law such as the Factories Act. When in doubt, treat it as blocked and confirm with a practitioner.

Section 16(4)

ITC Time Limit — The 30 November Deadline

ITC for a financial year must be claimed by the earlier of: 30 November of the following financial year (the due date of the October GSTR-3B), or the date you actually file the annual return (GSTR-9) for that year. Miss it and the credit lapses permanently.

Deadline for FY 2025-26 ITC

Financial yearFY 2025-26
Statutory last date30 Nov 2026
Or GSTR-9 filed on(if earlier)
Claim ITC by30 Nov 2026

180-day payment reversal

Invoice + GST₹1,18,000
ITC claimed₹18,000
Not paid in 180 daysReverse ₹18,000
Re-claim after payment₹18,000

Section 16(5)/16(6) (inserted by the Finance (No. 2) Act 2024, effective 27 September 2024) gave a one-time retrospective relaxation for FYs 2017-18 to 2020-21 and for revoked registrations — but for current years the ordinary 30 November limit under Section 16(4) applies.

Rules 37, 42 & 43

ITC Reversals You Must Track

Even validly claimed ITC may need to be reversed later. Track these and adjust in GSTR-3B.

  • 180-day rule (Rule 37) — reverse ITC if supplier invoice unpaid within 180 days; re-claim once paid
  • Rule 42 — proportionate reversal of common input/input-service ITC used for exempt supplies
  • Rule 43 — proportionate reversal of common capital-goods ITC used for exempt supplies
  • Blocked-credit reversal — any Section 17(5) portion claimed in error
  • GSTR-2B mismatch — reverse ITC not appearing in GSTR-2B
  • Annual reconciliation — reconcile ITC availed vs GSTR-2B and report in GSTR-9
TaxClue Insight

GST 2.0 (effective 22 September 2025) rationalised output rates into a two-slab 5%/18% structure plus a 40% demerit rate, but did not change the ITC framework — Section 16 conditions, GSTR-2B matching and Section 17(5) blocks all continue exactly as before.

Want a clean ITC reconciliation before you file GSTR-9?

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Sources
  1. Act & notifications: gst.gov.in
  2. CBIC: cbic-gst.gov.in
  3. ITC conditions & time limit: Section 16, CGST Act 2017
  4. Blocked credits: Section 17(5), CGST Act 2017
  5. 180-day rule: Rule 37; proportionate reversal: Rules 42 & 43, CGST Rules
  6. Sec 16(5)/16(6) relief: Finance (No. 2) Act 2024 (eff. 27 Sep 2024)

Disclaimer: This guide is general information based on the law and notifications in force when it was last updated. It is not professional advice for your case — rates, thresholds and due dates change, so check the current position with the official source before you act on it.

People also ask

Questions, answered

Short, direct answers to the 16 questions readers ask most on this topic.

Under Section 16 of the CGST Act you can claim ITC only if: you hold a valid tax invoice or debit note; the invoice appears in your GSTR-2B (Section 16(2)(aa) / Rule 36(4)); you have actually received the goods or services; the supplier has paid the tax to the government; you have filed your own GSTR-3B; and the input is used for business. All conditions must be met together, and the credit must be claimed within the Section 16(4) time limit.

No. Since 1 January 2022, Section 16(2)(aa) read with Rule 36(4) requires the invoice to be reflected in your GSTR-2B before you can claim ITC. If your supplier has not filed GSTR-1/IFF, the invoice will not appear and the credit is blocked — even if you hold the physical invoice and have paid the supplier. GSTR-2B is the controlling document for ITC.

GSTR-2A is a dynamic statement that keeps updating in real time as suppliers file. GSTR-2B is static — it is generated once a month and does not change afterwards. For claiming ITC, GSTR-2B is the controlling document under Rule 36(4); GSTR-2A is used mainly for reference and reconciliation.

Verify the ITC available in your GSTR-2B, then in GSTR-3B Table 4(A)(5) — "All other ITC" — enter the eligible amount. Reverse any ineligible portion (blocked under Section 17(5) or Rule 42/43) in Table 4(B). The net ITC (4A minus 4B) is auto-calculated and credited to your Electronic Credit Ledger to set off against output tax.

Blocked credit refers to categories of inputs and input services on which ITC cannot be claimed even though GST was paid. Key blocked items include motor vehicles for personal/corporate use, food and beverages, club and fitness membership, beauty and health services, works contract and goods/services for construction of immovable property, and goods lost, stolen, destroyed, written off or given as free samples. These are treated as personal or non-business in nature.

Generally no. ITC on motor vehicles is blocked under Section 17(5)(a) when the vehicle is used for personal transport, employee commuting or general corporate use. ITC is allowed only if the vehicle is used for further supply of vehicles (dealer), transport of passengers (cab/taxi business), driving training, or transport of goods (trucks, delivery vans). So an MD or HR car is blocked; a delivery truck or fleet cab is allowed.

Generally no. ITC on food, beverages and outdoor catering is blocked under Section 17(5)(b). Canteen meals, office snacks and team lunches are not claimable. Exceptions: ITC is allowed if you make an outward taxable supply of the same category (a restaurant or caterer), or if providing food is obligatory under a law in force (for example, certain factory/mine obligations).

No, for immovable property built on your own account. ITC on works contract services and on goods or services used for construction of an immovable property is blocked under Section 17(5)(c) and (d). The exception is where the construction is of plant and machinery, for which ITC remains available.

Under Section 16(4), ITC for a financial year must be claimed by the earlier of: 30 November of the following financial year (the due date of the October GSTR-3B), or the date of filing the annual return (GSTR-9) for that year. For FY 2025-26 the last date is 30 November 2026. Missing this deadline means the ITC lapses permanently.

The credit lapses permanently — you cannot carry it forward or adjust it in a later period, and it becomes an added cost. The only recent exception was the one-time relief under Sections 16(5)/16(6) (Finance (No. 2) Act 2024) for FYs 2017-18 to 2020-21 and revoked registrations; for current years no such relaxation applies.

Under the second proviso to Section 16(2) and Rule 37, if you do not pay your supplier (invoice value plus GST) within 180 days of the invoice date, the ITC already claimed must be reversed, along with interest. Once you make the payment, you can re-claim the same ITC without any time bar for the re-claim.

When common inputs or capital goods are used partly for taxable supplies and partly for exempt supplies (or non-business use), only the taxable-supply portion of ITC is admissible. Rule 42 governs proportionate reversal for inputs and input services, and Rule 43 for capital goods. The reversal is computed monthly and finalised annually.

Yes. ITC availed in your monthly GSTR-3B must be reconciled with your GSTR-2B and reported in the annual return GSTR-9 (mandatory where turnover exceeds ₹2 crore). Where turnover exceeds ₹5 crore, a reconciliation statement in GSTR-9C is also required. Any excess or short claim should be corrected before finalising the annual return.

No. The GST 2.0 rationalisation effective 22 September 2025 restructured output tax rates into a two-slab 5%/18% system plus a 40% demerit rate, but it did not alter the ITC framework. The Section 16 conditions, GSTR-2B matching under Rule 36(4), and the Section 17(5) blocked-credit list all continue unchanged.

Yes, subject to the same Section 16 conditions. ITC on capital goods used for business is available in full in the period of receipt (not spread over time), provided they are not blocked under Section 17(5) and you have not claimed depreciation on the GST component under the Income Tax Act. If used partly for exempt supplies, Rule 43 proportionate reversal applies.

No. A taxpayer registered under the composition scheme cannot claim Input Tax Credit and cannot charge GST on the invoice — they pay a flat rate on turnover instead. ITC is available only to regular (normal) GST-registered taxpayers. See our guide on the composition scheme for details.