GST input tax credit: the rules that actually block your claim
Four conditions, and all four must hold
Input tax credit lets a registered business set the GST it paid on purchases against the GST it collects on sales, so tax is borne only on the value the business adds. That is the design. In practice a claim survives only if four separate conditions are met at once, and a failure in any one of them denies the credit regardless of the other three.
- You hold a valid tax invoice and have actually received the goods or services.
- The supplier filed and paid. Their outward return has to appear in your GSTR-2B.
- The purchase is not on the blocked list in Section 17(5).
- You claimed in time and paid the supplier within 180 days.
The order matters when you are diagnosing a denied claim. The most common cause by a wide margin is the second, and it is the one entirely outside your control.
Condition one: it has to be in your GSTR-2B
GSTR-2B is a static, auto-drafted statement generated for each tax period from what your suppliers filed. Credit is available on what appears there. If a supplier files late, files wrong, or does not file at all, the invoice is missing and the credit is not available to you in that period, even though you hold the invoice and have paid the tax to them.
This is the practical reason to reconcile monthly rather than annually. A supplier who missed one month can usually be chased in the next; a supplier who has stopped filing entirely is a bad debt plus a lost credit, and you want to know that in month two rather than in month eleven.
The working habit that prevents most of this: download GSTR-2B on the 15th of every month, match it against your purchase register, and email every supplier whose invoice is missing before you file GSTR-3B. It takes an hour and it is the single highest-return hour in the GST compliance month.
Condition two: the blocked list under Section 17(5)
Some credits are denied by law no matter how correctly everything else was done. These are the ones businesses most often claim in error, because the expense is genuinely incurred for the business and it feels claimable.
| Category | Position |
| Motor vehicles for passenger transport, seating up to 13 including the driver | Blocked, unless you are in the business of supplying vehicles, transporting passengers, or driving instruction |
| Food and beverages, outdoor catering, health services, beauty treatment, cosmetic surgery | Blocked, unless you make an outward supply of the same category or are obliged by law to provide it to employees |
| Membership of a club, health or fitness centre | Blocked outright |
| Rent-a-cab, life insurance and health insurance | Blocked, unless obliged by law to provide it to employees, or you supply the same category |
| Works contract services for construction of immovable property | Blocked, unless it is an input service for a further works contract |
| Goods or services used for construction of immovable property on your own account | Blocked, even when used in the course of business, when capitalised to the property |
| Goods lost, stolen, destroyed, written off, or given away as free samples or gifts | Blocked |
| Tax paid under the composition scheme | Blocked |
The construction entries catch out more growing businesses than any other. Fitting out an office you own, where the cost is capitalised to the building, generally produces no recoverable credit on those inputs. Budget the GST as part of the capital cost rather than assuming it comes back.
Condition three: the November deadline
Section 16(4) sets the outer limit. Credit for an invoice cannot be taken after the due date of the return for November of the following financial year, or the date you file the annual return for that year, whichever is earlier. For invoices dated in FY 2025-26, that generally means the GSTR-3B due at the end of November 2026.
Two consequences follow that are worth planning around. First, an invoice you find during a year-end audit in January is already out of time. Second, filing the annual return early closes the window early, because the deadline is whichever event comes first. If you have unreconciled credits outstanding, that is a reason to complete the reconciliation before filing the annual return rather than after.
Condition four: pay the supplier within 180 days
Where you claim credit on an invoice and then do not pay the supplier the full value plus tax within 180 days of the invoice date, the credit has to be reversed, with interest. It can be reclaimed once payment is actually made, without the Section 16(4) time bar applying again to that re-availment.
This interacts badly with a long payables cycle. A business stretching suppliers to 120 or 150 days as a cash management tactic is one delayed cheque away from an interest-bearing reversal, and the reversal lands in a month it did not budget for. If your payable days are drifting past 150, the working capital position needs attention before the GST position does.
Reverse charge purchases work differently: there the credit generally becomes available only after the tax has actually been paid in cash, since you are both the payer and the claimant.
Diagnosing a denied claim, in order
- Is it in GSTR-2B? If not, the supplier is the problem. Chase them; nothing else you do will produce the credit.
- Is it on the blocked list? If yes, stop. It was never claimable and reversing it voluntarily with interest is cheaper than having it found.
- Is the invoice older than the November cut-off? If yes, the credit is gone. Record it as a cost and fix the reconciliation cadence that let it age.
- Is the supplier unpaid past 180 days? If yes, reverse now with interest and reclaim when you pay, rather than waiting to be assessed.
Most disputes that reach a notice are one of these four, identified late. A monthly reconciliation habit resolves the first and fourth before they become anything; reading the blocked list once resolves the second permanently.
Frequently asked questions
Can I claim ITC if I have the invoice but it is not in GSTR-2B?
Not in that period. The law ties availability to what appears in the auto-drafted statement, so holding a valid invoice is necessary but not sufficient. The remedy is with the supplier: once they file, the invoice appears in a later GSTR-2B and the credit becomes available then, provided you are still inside the Section 16(4) window.
Is GST on employee health insurance claimable?
Generally no. Health insurance sits in the blocked list under Section 17(5). The exception is where you are obliged under a law in force to provide it to employees, or where you make an outward supply of the same category. Voluntary group cover provided as a benefit does not usually qualify.
What happens if I claim blocked credit by mistake?
It has to be reversed with interest. Doing it voluntarily in a subsequent return is materially cheaper than having it raised in a notice, where penalty exposure is added. If a pattern of the same error runs across several months, fix the expense coding in your accounting system as well, or it will simply repeat.
Does the composition scheme allow input tax credit?
No. A composition dealer pays a flat rate on turnover and claims no input credit, and a buyer cannot claim credit on a purchase from one either, since no GST is charged on the invoice. That trade-off is the whole design of the scheme and is why it suits businesses selling to end consumers rather than to other registered businesses.
Where to go next on this site
- GST Invoice Calculator — Taxable value, CGST, SGST and IGST on a single invoice line.
- GST Calculator — Add tax to, or extract it from, any amount at any slab.
- GST Composition vs Regular — A lower rate with no input credit, against the full scheme.
- How to File a GST Return — The filing workflow this reconciliation feeds into.
- Tax Glossary — 106 tax terms defined, including every term used above.
- Profitable but No Cash in the Bank — Where a stretched payables cycle shows up in the accounts.
Sources
- GST Portal — GSTR-2B, GSTR-3B and annual return filing
- CBIC GST — the CGST Act, including Sections 16 and 17
- Section 16(4) time limit — the November cut-off explained with examples