GST Input Tax Credit (ITC) — Complete Guide 2026, Eligibility, Blocked Credits

Input Tax Credit (ITC) is the mechanism that prevents cascading of taxes under GST. It allows you to reduce your GST liability by the GST already paid on your purchases. But ITC comes with strict conditions — claiming ineligible ITC is one of the most common reasons for GST notices.

What is Input Tax Credit?

When you purchase goods or services for your business, you pay GST to your supplier. This GST paid on purchases is called Input Tax Credit. You can use this ITC to reduce the GST you owe on your sales.

Example:

• GST collected on sales (output tax): ₹1,00,000
• GST paid on purchases (input tax): ₹60,000
• Net GST payable: ₹40,000

Without ITC, you would pay ₹1,00,000. With ITC, you pay only ₹40,000.

Conditions for Claiming ITC

Under Section 16(2) of the CGST Act, ITC can be claimed only if ALL of the following conditions are met:

1. You have a valid tax invoice from a GST-registered supplier
2. The goods/services have been received by you
3. The supplier has filed GSTR-1 and the invoice appears in your GSTR-2B
4. You have filed your GSTR-3B for the period
5. The tax has been paid by the supplier to the government

Condition 3 is critical: If your supplier has not filed GSTR-1, the invoice will not appear in your GSTR-2B, and you cannot claim ITC — even if you have a valid invoice and have paid the supplier.

Section 16(4) — Time Limit for Claiming ITC

ITC for a financial year must be claimed by the earlier of:

• The due date of filing GSTR-3B for September of the following year
• The date of filing the annual return (GSTR-9)

For FY 2025-26: ITC must be claimed by November 30, 2026 (in the GSTR-3B for October 2026).

After this date, you permanently lose the ITC for FY 2025-26 purchases.

Blocked Credits — Section 17(5)

Section 17(5) lists specific goods and services on which ITC is NOT available, regardless of whether they appear in GSTR-2B:

Motor Vehicles

ITC is blocked on motor vehicles used for personal purposes. ITC is available if the vehicle is used for:

• Transportation of goods
• Passenger transportation (taxis, buses)
• Driving school
• Further supply of vehicles

Food and Beverages

ITC is blocked on food, beverages, outdoor catering, and club memberships — unless you are in the business of providing these services.

Health Insurance

ITC is blocked on health insurance premiums — unless it is mandatory under any law for your employees.

Works Contract Services

ITC is blocked on works contract services for construction of immovable property — unless the property is used for further supply of works contract services.

Construction of Immovable Property

ITC is blocked on goods and services used for construction of immovable property (building, civil structure) — unless it is a plant or machinery.

Personal Consumption

ITC is blocked on goods and services used for personal consumption by employees.

ITC Reversal Rules

Even if you have claimed ITC, you may need to reverse it in certain situations:

Rule 42 — ITC on Inputs Used for Exempt Supplies

If you use inputs for both taxable and exempt supplies, you must reverse ITC proportionate to exempt supplies.

Formula: ITC to reverse = Total ITC × (Exempt turnover / Total turnover)

Rule 43 — ITC on Capital Goods

Similar to Rule 42, but for capital goods. ITC on capital goods used for exempt supplies must be reversed over 60 months.

Section 16(2) Reversal

If you have claimed ITC but:

• The supplier has not paid the tax to the government
• You have not paid the supplier within 180 days

You must reverse the ITC and pay it back with 18% interest.

ITC on Capital Goods

ITC on capital goods (machinery, equipment) is available in full in the year of purchase — unlike the old CENVAT credit rules where it was spread over 2 years.

Exception: If the capital good is used for both taxable and exempt supplies, ITC must be reversed proportionately under Rule 43.

ITC Utilisation Order

ITC must be utilised in a specific order:

1. IGST ITC can be used against IGST, CGST, and SGST (in that order)
2. CGST ITC can be used against CGST and IGST (not SGST)
3. SGST ITC can be used against SGST and IGST (not CGST)

You cannot use CGST ITC to pay SGST or vice versa.

How to Maximise ITC

1. Reconcile GSTR-2B monthly — Identify missing invoices and follow up with suppliers
2. Verify supplier compliance — Before onboarding a supplier, check their GSTIN status and filing history
3. Claim ITC before the deadline — Do not wait until year-end; claim ITC in the month it appears in GSTR-2B
4. Maintain proper documentation — Keep all purchase invoices, delivery challans, and payment proofs
5. Track blocked credits — Do not claim ITC on Section 17(5) items; it will be reversed with interest

Common ITC Mistakes

1. Claiming ITC not in GSTR-2B — Leads to demand notice with 18% interest
2. Claiming blocked credits — Section 17(5) items are never eligible
3. Missing the Section 16(4) deadline — ITC is permanently lost after November 30
4. Not reversing ITC on exempt supplies — Rule 42/43 reversal is mandatory
5. Not paying suppliers within 180 days — ITC must be reversed if payment is delayed

Frequently Asked Questions

Can I claim ITC on purchases made before GST registration?

Yes, for stock held on the date of registration. File Form GST ITC-01 within 30 days of registration to claim ITC on opening stock.

What if my supplier cancels their GST registration?

If your supplier's registration is cancelled, you cannot claim ITC on purchases made after the cancellation date. For purchases before cancellation, ITC is available if the invoice appears in GSTR-2B.

Can I claim ITC on purchases from composition dealers?

No. Composition dealers cannot issue tax invoices, so no ITC is available on purchases from them.

---

Need help with ITC reconciliation and GSTR-3B filing? I handle monthly GST compliance starting ₹999/month. Message me on WhatsApp.