ITC & Tax Credit

Input Tax Credit (ITC) Under GST:
Complete Guide 2026

Input Tax Credit is the backbone of India's GST system — allowing businesses to offset tax paid on purchases against tax collected on sales. This guide covers everything about ITC eligibility, conditions, blocked credits, and reversal rules.

12 min read Updated June 2026 ITC & Compliance

In this article

What is Input Tax Credit (ITC)?

Input Tax Credit (ITC) is the credit a GST-registered business can claim for the GST paid on its purchases (inputs), which can be used to offset its GST liability on sales (output). It eliminates the cascading effect of taxes — the classic "tax on tax" problem that plagued India's pre-GST era.

For example: If you purchase goods and pay ₹18,000 GST (18% on ₹1,00,000), and sell those goods collecting ₹22,500 GST (18% on ₹1,25,000) — you only pay ₹4,500 net GST to the government. The ₹18,000 paid on purchase becomes your ITC.

ITC Formula

Net GST Payable = Output GST (on Sales) − Input Tax Credit (on Purchases)

ITC Eligibility Conditions (Section 16)

Under Section 16 of the CGST Act, ITC can be claimed only if ALL of the following conditions are met:

Mandatory Conditions for ITC Claim

  • Registered person: Only a GST-registered person can claim ITC
  • Tax invoice or debit note: You must possess a valid tax invoice or debit note from a registered supplier
  • Receipt of goods or services: The goods or services must have actually been received
  • Tax payment by supplier: The supplier must have actually paid the GST to the government (verified via GSTR-2B)
  • Return filed: The registered person must have filed their GST return (GSTR-3B)
  • Time limit: ITC must be claimed by November 30 of the following financial year, or the date of filing the annual return — whichever is earlier

Section 16(2)(aa) — GSTR-2B Linkage

Since January 2022, ITC is available only to the extent the invoice appears in the buyer's GSTR-2B (auto-drafted from supplier's GSTR-1). If a supplier doesn't file GSTR-1, the buyer loses ITC even if they paid GST — making supplier selection critical.

Blocked Credits — Section 17(5)

Section 17(5) of the CGST Act lists specific supplies on which ITC is NOT available regardless of business use:

CategoryExamplesITC Status
Motor vehicles (capacity ≤13 persons)Cars, SUVs (not for transportation business)❌ Blocked
Food, beverages, outdoor cateringRestaurant bills, office meals, corporate events❌ Blocked
Club memberships, fitness centreGym memberships, club fees❌ Blocked
Personal travel, vacationAirline tickets, hotel for personal travel❌ Blocked
Works contract servicesConstruction of immovable property (own use)❌ Blocked
Goods/services for personal useAny purchase for personal consumption❌ Blocked
Motor vehicles (business use)Trucks, buses for transportation✅ Allowed
Business travelHotel & flights for business trips✅ Allowed

ITC Reversal Rules

ITC already claimed must be reversed (added back to tax payable) in certain situations:

When Must ITC Be Reversed?

  • Non-payment to supplier within 180 days: If you don't pay your supplier within 180 days of invoice date, the ITC must be reversed (and can be re-claimed upon payment)
  • Capital goods partly used for exempt supplies: ITC proportionate to exempt use must be reversed
  • Goods used for personal purpose: Full ITC reversal required
  • Credit note from supplier: ITC reversal required for the amount in the credit note
  • Annual return reconciliation: Any excess ITC found during GSTR-9 reconciliation must be reversed

180-Day Rule — Most Common ITC Loss

Section 16(2)(b) requires you to pay your supplier within 180 days of the invoice date. Many businesses lose ITC permanently because they forget this rule for credit purchases. Set payment alerts or use ERP with built-in 180-day tracking.

How to Claim ITC via GSTR-2B

GSTR-2B is an auto-drafted statement of available ITC generated on the 14th of every month, based on your suppliers' GSTR-1 filings. Since FY 2021-22, ITC can only be claimed for invoices appearing in GSTR-2B.

Steps to Claim ITC Correctly

  1. Download GSTR-2B from the GST portal every month after the 14th
  2. Compare GSTR-2B with your Purchase Register — identify missing invoices
  3. Follow up with suppliers who haven't filed GSTR-1
  4. Claim only GSTR-2B-matched ITC in your GSTR-3B
  5. Excess ITC claimed over GSTR-2B attracts 100% interest and penalty

Use Milaan ERP for Auto-Reconciliation

Milaan ERP automatically reconciles your purchase register with GSTR-2B every month — highlighting mismatches, missing invoices, and eligible ITC in seconds. Eliminate manual reconciliation errors.

ITC in Special Situations

ITC on Import of Goods

IGST paid on imports (at customs) is available as ITC. The bill of entry serves as the tax invoice for this purpose. You must have a valid bill of entry and proof of IGST payment.

ITC on Reverse Charge Mechanism (RCM)

When GST is paid under Reverse Charge Mechanism (buyer pays instead of supplier), the buyer can claim ITC for the GST paid under RCM — but only in the same month after actual payment.

ITC for Job Work

Goods sent for job work (semi-processing) can retain ITC at the principal's level. The goods must return within 1 year (3 years for capital goods) or the ITC must be reversed.

ITC for Mixed Use (Partly Exempt Supplies)

When goods or services are used for both taxable and exempt supplies, ITC must be apportioned under Rule 42 and 43 of CGST Rules.

Tips to Maximise Legitimate ITC

  • Always verify supplier's GSTIN before purchase — invalid GSTIN = no ITC
  • Reconcile GSTR-2B with purchase register every month before GSTR-3B filing
  • Follow up with suppliers who haven't filed GSTR-1 by the 11th of each month
  • Pay all suppliers within 180 days — track due dates in your ERP
  • Ensure all purchase invoices are GST-compliant (GSTIN, HSN, tax breakup)
  • Claim ITC within the time limit (by November 30 of next FY)
  • Maintain an ITC register with invoice-wise details for audit purposes

Frequently Asked Questions on ITC

Can I claim ITC on goods purchased before GST registration?
Yes, under certain conditions. Section 18(1)(a) of the CGST Act allows ITC on closing stock held on the date of registration, subject to: goods being intended for taxable supply, having valid invoices not older than 12 months, and the supplier not being a composition dealer.
What if my supplier files GSTR-1 late? Do I lose ITC?
You don't permanently lose ITC if the supplier eventually files GSTR-1 before the cutoff date. The invoice will appear in a subsequent GSTR-2B, and you can claim ITC at that point. However, if the supplier never files or files after November 30 of the next FY, the ITC is permanently lost.
Is ITC available on GST paid under Reverse Charge Mechanism?
Yes. GST paid under RCM is available as ITC — but only after actual cash payment of the RCM liability. The ITC cannot be used to pay the RCM itself; it must be paid in cash first, and then the ITC can be claimed for the next period.
Can a composition dealer claim ITC?
No. Composition scheme dealers cannot claim ITC on their purchases. This is one of the trade-offs of the Composition Scheme — lower compliance burden and flat tax rate, but no ITC availability. This makes the scheme unsuitable for businesses with high input costs.

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