Blocked input tax credit is GST paid on purchases that Section 17(5) of the CGST Act bars you from claiming even for business use. It covers most passenger vehicles, food and beverages, club memberships, works contracts and goods for constructing immovable property, personal consumption, goods lost or given as gifts or free samples, CSR spending and certain other items, with specific exceptions.
Some GST you pay on business purchases can never come back as credit, however clearly the purchase is for business. Section 17(5) of the CGST Act lists these "blocked credits". Getting this list wrong is one of the most common reasons for ITC demands, because the credit often appears in your GSTR-2B and flows into GSTR-3B by default.
This article walks through every item on the list as it currently stands, the exceptions written into the law, and how to reverse blocked credit correctly. For the general conditions that apply to all ITC, see input tax credit rules.
What does Section 17(5) block?
Section 17(5) starts with "notwithstanding anything contained in" Section 16(1) and 18(1), which means these items are blocked even if all the normal ITC conditions are met.
| Clause | What is blocked | Main exceptions |
|---|---|---|
| (a) | Motor vehicles for transporting persons, seating up to 13 including driver | Further supply of such vehicles; transport of passengers; driving training |
| (aa) | Vessels and aircraft | Further supply; passenger transport; navigation/flying training; transport of goods |
| (ab) | General insurance, servicing, repair and maintenance of the vehicles, vessels and aircraft above | Where the vehicle itself is used for an exempted purpose; manufacturers of such vehicles; insurers of them |
| (b)(i) | Food and beverages, outdoor catering, beauty treatment, health services, cosmetic and plastic surgery, leasing/renting/hiring of the above vehicles, life and health insurance | Used to make an outward taxable supply of the same category, or as part of a taxable composite/mixed supply |
| (b)(ii) | Membership of a club, health and fitness centre | None |
| (b)(iii) | Travel benefits to employees on vacation (leave or home travel concession) | — |
| (b) proviso | — | Items in (b) are allowed where an employer is obliged by law to provide them to employees |
| (c) | Works contract services for construction of immovable property (other than plant and machinery) | Where it is an input service for further supply of works contract service |
| (d) | Goods or services for construction of immovable property on own account (other than plant and machinery), even if used for business | — |
| (e) | Goods or services on which tax was paid under the composition scheme (Section 10) | — |
| (f) | Goods or services received by a non-resident taxable person | Goods imported by them |
| (fa) | Goods or services used for CSR obligations under Section 135 of the Companies Act | — |
| (g) | Goods or services for personal consumption | — |
| (h) | Goods lost, stolen, destroyed, written off, or disposed of as gifts or free samples | — |
| (i) | Tax paid under Section 74 (fraud/suppression cases) for periods up to FY 2023-24 | — |
How do the construction blocks work?
Clauses (c) and (d) catch many businesses out.
- "Construction" includes re-construction, renovation, additions, alterations or repairs to the extent of capitalisation.
- "Plant and machinery" means apparatus, equipment and machinery fixed to earth by foundation or structural support used for making outward supplies, including those foundations and supports. It excludes land, buildings and other civil structures, telecommunication towers, and pipelines laid outside the factory premises.
- An Explanation added to the Act clarifies that "plant or machinery" in clause (d) must be read as "plant and machinery", overriding any court judgment to the contrary.
So GST on cement and steel for a factory shed is blocked, but GST on the foundation for a machine bolted to that floor is generally not.
Which common business expenses are usually blocked?
- Staff lunches, team dinners and festival sweets for employees (food and beverages), unless a law makes the employer provide them.
- Hotel room service and restaurant bills on business trips — the accommodation may be eligible, but food is generally blocked.
- Company cars used by directors or sales staff (up to 13 seats).
- Car insurance and car servicing for those blocked vehicles.
- Gym or club memberships for staff.
- Diwali gifts to customers or dealers, and free samples handed out at trade fairs.
- Health insurance for employees, unless required by law.
- Building a new office, showroom or warehouse, including capitalised renovations.
- Stock destroyed in a fire or flood, or written off as expired.
- Anything bought for the owner's personal use.
Worked example: a Pune engineering firm's monthly reversal
A Pune engineering firm's GSTR-2B for September 2026 shows total ITC of ₹1,52,000. Its accountant reviews each line:
| Item | GST in GSTR-2B | Blocked? | Clause |
|---|---|---|---|
| Steel and components for production | ₹96,000 | No | — |
| Freight on finished goods | ₹6,000 | No | — |
| New sedan for the managing director | ₹28,000 | Yes | (a) |
| Insurance on that sedan | ₹1,800 | Yes | (ab) |
| Staff Diwali lunch | ₹2,700 | Yes | (b)(i) |
| Gift hampers for dealers | ₹4,500 | Yes | (h) |
| Civil work on a new office floor (capitalised) | ₹13,000 | Yes | (d) |
Blocked total: ₹28,000 + ₹1,800 + ₹2,700 + ₹4,500 + ₹13,000 = ₹50,000.
Eligible ITC: ₹1,52,000 − ₹50,000 = ₹1,02,000 (₹96,000 + ₹6,000).
In GSTR-3B, the firm lets Table 4(A) show ₹1,52,000 from GSTR-2B and reverses ₹50,000 in Table 4(B)(1) (reversal under Rules 38, 42, 43 and Section 17(5)). Net ITC available: ₹1,02,000.
If the firm had instead claimed the full ₹1,52,000 and used it to pay tax, the ₹50,000 would be ITC wrongly availed and utilised, with interest under Section 50(3) at the notified rate (the Act caps it at 24%) from the date of utilisation.
How do I reverse blocked ITC in GSTR-3B?
- Download GSTR-2B and tag each line as eligible, blocked or partly eligible.
- Total blocked credit by tax head (IGST, CGST, SGST, cess).
- In GSTR-3B Table 4, let Table 4(A) reflect GSTR-2B.
- Enter the blocked amount in Table 4(B)(1).
- Enter other reversals (for example common credit attributable to exempt supplies) in the relevant part of 4(B).
- Check that Table 4(C), net ITC available, equals your eligible total.
- Keep a working file with invoice numbers and clauses for each reversal.
If you prefer, you can also reject an invoice in IMS so it never enters GSTR-2B — but only reject records that are actually wrong. A valid supplier invoice for a blocked item is not wrong; it is simply ineligible for credit, so accepting it and reversing in Table 4(B) keeps your records honest.
What is the difference between blocked and ineligible ITC?
The two terms are often used loosely, but they come from different rules:
| Type | Source in law | Example | Can it ever become eligible? |
|---|---|---|---|
| Blocked credit | Section 17(5) | Passenger car, staff meals, office construction | Only if an exception in the clause applies |
| Apportioned (partly ineligible) | Section 17(1) and 17(2), Rules 42 and 43 | Common credit used partly for exempt supplies or personal use | The business/taxable share is eligible |
| Time-barred | Section 16(4) | Invoice not claimed by 30 November after the year | No |
| Conditions not met | Section 16(2) | Invoice not in GSTR-2B, goods not received, supplier did not pay | Yes, once the condition is met (within the time limit) |
| 180-day non-payment | Section 16(2) second proviso | Supplier not paid within 180 days | Yes, when payment is made |
In GSTR-3B, Section 17(5) blocked credit and Rules 38/42/43 reversals go into Table 4(B)(1); other reversals that may be reclaimed later go into Table 4(B)(2). Keeping these categories separate in your working papers helps when you prepare the annual return, where ITC has to be broken down again. See GSTR-9 annual return.
How do specific businesses run into blocked credit?
- Traders of cars. A car dealer buying cars for resale can claim ITC, because the exception for "further supply of such motor vehicles" applies.
- Driving schools. Vehicles used to impart driving training fall within the exception.
- Caterers and restaurants. Food bought to make an outward supply of food is within the "same category" exception, subject to the rate notification under which they pay tax.
- Builders. A builder supplying works contract services can claim ITC on works contract services received, because they are inputs for further supply of works contract service.
- Manufacturers with plant. Machinery fixed to foundations is "plant and machinery" and outside the construction block, but the factory building itself is not.
How do you decide quickly whether a purchase is blocked?
Run every doubtful purchase bill through the same short test before booking the credit:
- Is it used for business at all? Goods or services used for personal consumption are blocked under Section 17(5)(g), whatever they are.
- Does it appear on the Section 17(5) list? Motor vehicles, food and beverages, club memberships, works contracts and construction of immovable property, goods lost, stolen, destroyed, written off or given as free samples or gifts, and tax paid under composition are the usual suspects.
- Does an exception apply? Many entries carry carve-outs — for example, the credit is not blocked where the same category of goods or services is supplied onward as part of a taxable supply, or where provision of the item is obligatory for an employer under a law in force.
- Record the reason. Write the clause number against the bill in your purchase register, so the reversal in Table 4(B)(1) of GSTR-3B can be traced at year-end.
A short numeric illustration
A Thane interior-design firm buys in one month: office chairs with ₹9,000 GST, a staff Diwali dinner with ₹4,500 GST, and furniture fitting materials for a client project (resold as part of its taxable works supply) with ₹27,000 GST. The chairs are business assets and eligible. The dinner is food and beverages with no exception, so ₹4,500 is blocked. The fitting materials are supplied onward as part of the firm's own taxable supply, so they fall within the exception and the ₹27,000 is eligible. Net credit for the month is ₹36,000, with ₹4,500 reported as reversed.
Common mistakes
- Treating "used for business" as enough. Section 17(5) overrides the business-use test.
- Claiming ITC on capitalised repairs to buildings.
- Forgetting the knock-on blocks — insurance and servicing of a blocked car are blocked too.
- Missing gifts and free samples given months after purchase; reverse when given.
- Claiming on stock written off. Expired or destroyed goods require reversal of credit taken on them.
- Not documenting exceptions. If you rely on an exception (for example a vehicle used for driver training), keep proof.
- Rejecting valid invoices in IMS to avoid reversal entries.
Key takeaways
- Section 17(5) blocks ITC regardless of business use.
- The biggest traps: passenger cars, food, gifts and samples, and building construction.
- Exceptions exist — read the clause, not just the heading.
- Reverse blocked credit in Table 4(B) of GSTR-3B; do not quietly drop it.
- Blocked credit wrongly used attracts interest under Section 50(3).
When you invoice, tagging expense categories consistently makes this monthly review much faster. For the monthly matching process, see GSTR-2B reconciliation; for where reversals are filed, the GSTR-3B filing guide.
This guide is general information, not tax advice. Rules last checked on 20 October 2026; confirm with your tax professional for your situation.