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Under India’s GST, input tax credit (ITC) lets a GST-registered business offset eligible GST paid on business purchases against its GST liability. It is not an automatic refund of GST on every business expense: the business must meet the statutory conditions, observe restrictions and claim the credit within the applicable time limit.
How input tax credit works
When a business pays GST on eligible inputs, the law may allow it to use that tax as a credit against GST it owes. The credit is conditional, transaction-specific and subject to the rules in the Central Goods and Services Tax Act, 2017. Whether a particular invoice qualifies depends on the supply, the business’s use of it, the supporting documents and the circumstances of the claim.
ITC reduces a tax liability; it does not, by itself, mean the business receives the amount as cash. A business should assess each purchase rather than assume that GST shown on an invoice is recoverable.
What must be true to claim ITC?
The general entitlement in Section 16 applies to a registered person using or intending to use a supply in the course or furtherance of business. The applicable conditions are cumulative: satisfying one does not replace the others.
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- The claimant is registered under GST.
- The supply has a prescribed supporting document, such as a tax invoice, debit note, bill of entry or another document permitted by the rules.
- The business has received the goods or services. Where goods arrive in lots or instalments, the Act addresses when credit may be taken by reference to receipt of the last lot.
- The related tax has been paid to the Government by the supplier, subject to the statutory mechanisms and exceptions that apply to the transaction.
- The claimant has furnished the required return and meets the other applicable statutory conditions.
- No restriction or time bar prevents the credit. The rules on business use, exempt supplies, blocked credit and the claim deadline still apply.
The detailed conditions and related rules are set out in the CGST Act and Rules and the CBIC Input Tax Credit Rules.
Keep evidence that supports the claim
Keep the prescribed tax document and records showing what was purchased, when it was received and how it relates to the business. Supplier and return reconciliations, records supporting business use, and payment evidence can also help establish the facts. This is a practical record-keeping list, not a claim that each item is a separate universal prescribed form.
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When can ITC be restricted or blocked?
Section 17 limits credit according to how an input or service is used. The following distinctions help identify what to check before claiming:
| Use or category | General treatment | What to check |
|---|---|---|
| Used wholly for business relating to taxable or zero-rated supplies | Potentially creditable, subject to the Section 16 conditions and any applicable restriction. | Confirm the supply’s use, documentation, receipt, tax-payment condition and deadline. |
| Used for non-business purposes | Credit attributable to non-business use is restricted. | Separate business use from non-business use where the supply serves both. |
| Shared between taxable and exempt supplies | Credit must be apportioned under the applicable rules. | Identify the exempt-use portion and apply the statutory apportionment method. |
| Within a category blocked by Section 17(5) | Credit is generally unavailable unless a statutory exception applies. | Check the exact clause and its exceptions; business use alone does not establish eligibility. |
Section 17 contains the restrictions and blocked-credit provisions; see the CGST Act, Chapter V. Because the clauses and exceptions matter, do not rely on a broad rule that all business expenses qualify.
What is the ITC deadline?
For the ordinary current rule under Section 16(4), claim ITC by 30 November following the end of the financial year to which the invoice or debit note relates, or before filing the relevant annual return, whichever is earlier. The date can therefore be earlier than 30 November if the relevant annual return is filed first.
Sections 16(5) and 16(6) provide retrospective relief for specified cases; they are not a general extension of the ordinary deadline. CBIC Circular 237/31/2024-GST, dated 15 October 2024, explains implementation of those provisions and their targeted application. A claim involving an older period requires checking the provision, period and facts against the circular and the applicable law. Older CBIC FAQ wording refers to a September deadline; do not treat that summary as the ordinary current rule. See the CBIC Sectoral FAQs alongside the later statutory rule.
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What if the business does not pay its supplier on time?
If the recipient has taken ITC but does not pay the supplier the value of the supply and the tax within 180 days of the invoice date, the statutory framework generally requires credit proportionate to the unpaid amount to be added to output tax liability, with interest. The recipient may become eligible to re-avail the credit after payment. This particular 180-day rule excludes supplies on which tax is payable under reverse charge. Check the applicable rule and amendments for the transaction; the CBIC ITC Rules and CGST Act set out the framework.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How is ITC handled in the return?
CBIC Circular 170/02/2022-GST explains how certain ineligible or unavailable credits are reported in GSTR-3B: ineligible credit under Section 17(5) or other provisions is reversed in Table 4(B), while Table 4(D)(2) is discussed for certain time-barred or otherwise unavailable ITC. The circular also refers to corresponding details in GSTR-2B. Consult the circular and current GST portal instructions for the return period and reporting treatment; do not rely on legacy references to GSTR-2 as the general recipient filing workflow.
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When to get transaction-specific advice
This is a general explanation, not a determination that a particular invoice qualifies. If a material claim depends on a Section 17(5) exception, mixed-use apportionment, an older financial year, a supplier-tax issue or a reversal, check the current consolidated law and records for that transaction. A GST practitioner can help assess a disputed or significant claim.
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