ITC: Conditions, Blocked Credits & Reversal

TL;DR

Input Tax Credit (ITC) under Section 16 is available on goods and services used in the course or furtherance of business — subject to four conditions (possession, use, supplier return, payment within 180 days) and the Section 17(5) blocked-credit list.

Input Tax Credit (ITC) is the cornerstone of GST for businesses. Under Section 16 of the CGST Act, a registered person can claim credit for the GST paid on inward supplies (goods and services) used in the course or furtherance of business. The credit reduces the GST payable on outward supplies. Eligibility is conditional — four specific conditions must be met, and a defined list of supplies is blocked. This post walks through every condition, every blocked credit, and the reversals you must handle when conditions change.

The Four Conditions for ITC

Section 16(2) lays down the eligibility conditions. All four must be satisfied at the time of claiming ITC.

1. Possession of the tax invoice or debit note

You must hold the original tax invoice (or a duplicate issued under Section 31), or the debit note, issued by the supplier. For invoices above ₹50,000, the invoice number and GSTIN of the supplier must be reflected in GSTR-1 filed by the supplier. For invoices above ₹5,000, the recipient’s details must be uploaded in the supplier’s GSTR-1.

For goods received from an unregistered supplier, you hold a bill of supply under Section 31(3)(e) for reverse-charge supplies. For goods imported, the ITC is based on the bill of entry and the customs duty payment challan.

2. Receipt of the goods or services

You must have actually received the goods or services. For goods, “receipt” is interpreted as physical possession or constructive delivery to your premises (or your agent’s premises). For services, the test is whether the service has been performed.

3. Tax actually paid by the supplier

The supplier must have paid the tax to the government. This is reflected in the auto-generated GSTR-2B of the recipient — a line item that does not appear in GSTR-2B cannot be claimed as ITC. The check is enforced via Section 16(2)(aa) and the second proviso to Section 16(2) — ITC is only available if the supplier’s GSTR-1 matches the buyer’s claim within the matching window.

4. Payment to the supplier within 180 days

You must have paid the supplier (along with the GST) within 180 days of the invoice. If payment is delayed, the ITC you claimed must be reversed in your GSTR-3B (Table 4(B)(2)) with interest under Section 50 at 18% per annum. When you subsequently pay the supplier, the ITC can be reclaimed.

The 180-day clock runs from the invoice date. A partial payment does not extend the clock for the unpaid balance — the full invoice must be paid within 180 days of the original invoice date, otherwise the entire claimed ITC (not just the unpaid portion’s proportional share) is reversed. Interest under Section 50 applies for the period the reversal stood in your books.

The Section 17(5) Blocked Credit List

Section 17(5) blocks ITC on specific categories of inward supplies, regardless of whether they are used in business. The list is closed and cannot be expanded by interpretation.

Blocked Supply	Notes
Motor vehicles and other conveyances (except those used for transportation of goods, public transport, driving schools, or further sale)	The narrow exceptions matter: a passenger car for an employee is blocked; a goods carrier is not.
Food and beverages, outdoor catering, beauty treatment, health services, cosmetic and plastic surgery	The exception is where these are part of a composite inward supply.
Membership of clubs, health and fitness centres	No exception.
Rent-a-cab, health insurance, life insurance	Except where the insurance is mandatory for an employee under any law, or the supply is part of a composite supply.
Travel benefits to employees on leave (LTA, vacation)	Except for travel in connection with business.
Goods and services used for personal consumption	Strictly blocked.
Goods lost, stolen, destroyed, written off, or disposed of by way of gift or free samples	Strictly blocked. The exception is goods destroyed in a fire or natural calamity, if covered by insurance.
Tax paid on inward supplies used in the construction of an immovable property (other than plant and machinery)	Exception: when the immovable property is intended for further sale.
Tax paid on plant and machinery used in the construction of immovable property where the plant and machinery is not embedded in the property	Limited scope.

The “motor vehicle” exception is the most contested. A delivery van is not blocked; a sales executive’s car is blocked. A driving school’s car is not blocked; a car given to a director as a perk is blocked.

The “construction of immovable property” rule blocks ITC on cement, steel, paint, tiles, fittings, and most materials used in construction. If you are constructing a building for own use, the GST paid on those inputs is a cost. If you are constructing a building for sale, ITC is allowed.

The Reversal Rules

When the conditions for ITC are no longer met, you must reverse the credit. The reversals are:

1. Section 16(2)(d) reversal — non-payment within 180 days

Reverse in GSTR-3B Table 4(B)(2) with interest under Section 50. Reclaim when payment is made.

2. Section 17(4) reversal — inputs used in exempt supplies

If your business has both taxable and exempt supplies, the ITC on inputs that are commonly used must be reversed proportionately. The proportion is calculated using the formula in Rule 42 of the CGST Rules:

Reversal = Common ITC × (Exempt turnover / Total turnover)

The reversal applies on a monthly basis. The credit utilisation for exempt supplies is debited to the electronic credit ledger.

3. Section 18(4) reversal — stock on transition to composition

If you switch from regular to composition scheme, the ITC on stock-in-hand (raw materials, semi-finished, finished) and on capital goods must be reversed in the return for the last regular-taxpayer month. The reversal is computed under Rule 44 of the CGST Rules.

4. Section 29 reversal — cancellation of registration

If your registration is cancelled, the ITC on stock and capital goods must be reversed. The output tax on the closing stock is computed and paid. The reversal is reported in the final return.

5. Voluntary payment reversal

You can voluntarily reverse ITC if you realise a mistake (claiming a higher amount than eligible, claiming on a blocked credit, claiming a credit that should not have been claimed). The reversal is in GSTR-3B Table 4(D). If you reverse voluntarily, the interest under Section 50 is also computed and paid.

Practical Examples

Example 1 — A consultancy claiming rent and stationery

A consultancy pays ₹1,00,000 per month rent to a registered landlord and ₹5,000 per month in stationery. Both attract 18% GST. The consultancy claims the ITC every month in GSTR-3B. This is fully eligible — rent and stationery are used in the course of business and not on the Section 17(5) blocked list.

Example 2 — A manufacturing company purchasing cars for directors

A manufacturing company buys two cars for the directors’ use. The cars are passenger vehicles. The 28% GST paid on the cars is blocked under Section 17(5) — motor vehicles for personal use. The ITC cannot be claimed.

If the same company buys a delivery van for moving finished goods, the ITC is fully eligible. The distinction is the use, not the type of vehicle.

Example 3 — A trader building a warehouse

A trader builds a warehouse for own use. The cement, steel, and labour cost ₹30 lakh, attracting ₹5.4 lakh GST. The ITC on the construction inputs is blocked under Section 17(5)(d) — construction of immovable property other than plant and machinery. The ₹5.4 lakh is a cost.

If the trader builds a commercial property for further sale (a developer), the same ITC is fully eligible because the immovable property is for further sale.

Example 4 — Mixed business — partly exempt

A financial services company provides both taxable services (financial advisory) and exempt services (securities transactions are exempt under Schedule III of the CGST Act). The common inputs (rent, electricity, stationery) attract ITC that must be reversed proportionately. The reversal is calculated monthly under Rule 42.

Common Mistakes

1. Claiming ITC on blocked credits. Section 17(5) is closed. The “we use it for business” defence does not work for blocked supplies. Reverse voluntarily to avoid Section 74 proceedings.
2. Not reversing the 180-day ITC. The supplier is paid late, the 180-day clock has run out, the ITC is still in the books. The mismatch is flagged in GSTR-2B. Reverse immediately, pay interest, reclaim when payment is made.
3. Claiming ITC on a cancelled registration. A supplier whose GSTIN is cancelled cannot be the source of ITC — the supply is no longer a valid taxable supply.
4. Claiming ITC on a non-business expense. A lunch at a restaurant with a client is a business expense but still blocked under Section 17(5). A meal at the office cafeteria is blocked.
5. Mismatching the ITC head. The ITC for CGST must be used for CGST output. The cross-utilisation rules (Section 49) allow IGST to be used for both CGST and SGST, but not vice versa.

When to Get a Professional Review

If your GSTR-2B has any line items where the supplier filed GSTR-1 differently from the invoice you hold, you have an ITC issue. If your supplier’s GSTIN has been cancelled, you have an ITC issue. If you have any supply on the Section 17(5) list that you claimed ITC on, you have an ITC issue.

We routinely clean up ITC reversals, file voluntary reversals, and reconcile GSTR-2B to the books. Our GST return filing and bookkeeping services cover both. Share your GSTR-2B and your purchase register on WhatsApp for a free reconciliation.

For the related topic of GSTR-1 vs GSTR-3B reconciliation, see our GSTR-1 vs GSTR-3B guide. For the reverse-charge interaction with ITC, see our reverse charge guide.

Sources

• GST Portal — GSTR-2B
• CBIC — CGST Act Section 16, 17, 18; CGST Rules 42, 44