Input Tax Credit (ITC)

By 2026, Input Tax Credit is the most-litigated single concept in Indian indirect tax. The arithmetic looks simple — tax paid on inputs is creditable against tax payable on outputs. The reality is that Section 16 of the CGST Act, 2017 makes ITC contingent on five cumulative conditions, the GSTN portal continuously matches supplier and recipient data, and Rule 86A empowers the officer to block ITC unilaterally for up to a year on the basis of mere suspicion. A taxpayer who is good at booking ITC but weak on substantiating ITC eligibility is now routinely facing reversal demands of crores, often years after the credit was originally taken.

The five conditions under Section 16(2): (a) possession of tax invoice or debit note, (b) actual receipt of goods or services, (c) tax has been actually paid by the supplier (read with Rule 37A), (d) recipient has filed the relevant return, and (e) ITC has not been claimed beyond the Section 16(4) limitation (earlier of 30 November of the following FY or filing of the annual return). Section 17(5) overlays this with a list of blocked credits — motor vehicles (with exceptions), food and beverages, club memberships, life insurance, works contract for immovable property, goods lost / stolen / destroyed, gifts and free samples — that are simply ineligible regardless of the Section 16 conditions.

We design and operate ITC frameworks that survive scrutiny — from monthly GSTR-2B reconciliation to Rule 86A unblocking, ISD architecture, capital goods optimisation, and Section 16(2)(c) supplier-default defence using current case-law.

The ITC Conditions That Get Tested

Section 16(2)(c) + Rule 37A — supplier non-payment: ITC is allowed only if the supplier has paid tax to the government. Rule 37A operationalises this: where the supplier has not filed GSTR-3B for the relevant tax period, the recipient's ITC must be reversed in the second tax period after the lapse, with reclaim possible when the supplier later pays. The 110% / 105% Rule 36(4) restriction has been replaced by direct GSTR-2B-based matching.

Section 16(4) limitation: ITC for any FY can only be availed up to the earlier of (i) the 30th November of the following FY (extended from October by Finance Act 2022) or (ii) the date of filing the annual return. ITC availed after this date is permanently lost.

Section 17(5) blocked credits: Specified categories are simply ineligible — motor vehicles for personal use, food / beverage / outdoor catering, beauty / health / cosmetic surgery, membership of clubs, life / health insurance (except where statutorily mandated for employees), travel benefits to employees on leave, works contract for immovable property (except plant and machinery), construction of immovable property on own account.

Rule 86A — credit blocking: Where the officer has reasons to believe credit was fraudulently availed, ITC in the electronic credit ledger can be blocked for up to one year. Blocking is administrative; unblocking through writ or representation is the standard remedy.

Architectural Choices That Matter

Capital Goods ITC: Full ITC available in the year of receipt (no five-year amortisation under GST as there was under VAT) — provided depreciation is not claimed on the GST component under Section 16(3). The election between depreciating the GST component (and forgoing ITC) vs claiming ITC (and not depreciating) is made invoice-wise.

Input Service Distributor (ISD): Where common input services (audit fees, software, advertising, professional fees) are received at a head office serving multiple State GSTINs, an ISD registration distributes ITC across the receiving GSTINs in the ratio of turnover. Without ISD, the credit either sits stranded at HO or gets cross-charged through invoices — both with friction.

Reversal under Rule 42 / 43: Where inputs / capital goods are used partly for taxable and partly for exempt supplies, proportionate reversal applies — formula-based monthly reversal under Rule 42 (inputs / input services) and Rule 43 (capital goods, over 60 months). Many taxpayers either skip this entirely or apply it incorrectly; it surfaces in audit.