Input tax credit (ITC) is central to GST compliance and working capital efficiency. Registered persons may claim ITC on inward supplies used or intended to be used in the course of business, subject to conditions in Section 16 and restrictions in Section 17(5).
Mismatches between books, supplier GSTR-1, and recipient GSTR-2B are among the most common reasons for ITC denial in scrutiny and audit. Robust monthly reconciliation reduces interest and penalty exposure.
This article explains eligibility conditions, reconciliation practices, and reversal triggers.
Conditions for claiming ITC — Section 16
- Possession of valid tax invoice or debit note issued by a registered supplier.
- Receipt of goods or services (including where received by job worker on direction).
- Tax charged has been paid to the government — increasingly verified through GSTR-2B.
- Filing of return under Section 39 — recipient must file GSTR-3B.
- Payment to supplier within 180 days where applicable, or reverse ITC with interest.
Blocked credit — Section 17(5)
Specified items are ineligible even if used in business, including motor vehicles for certain purposes, food and beverages, outdoor catering, beauty treatment, club membership, travel benefits to employees, works contract for immovable property (except plant and machinery), and goods lost or destroyed. Document business nexus and exceptions carefully.
GSTR-2B reconciliation
Monthly process
- Download GSTR-2B on or after 14th of the month.
- Match with purchase register on GSTIN, invoice number, date, and tax amounts.
- Follow up with vendors for non-filing or amendments in GSTR-1.
- Claim ITC in GSTR-3B per policy — many taxpayers restrict to 2B-matched credits.
- Maintain reconciliation statements for audit and Form 3CD.
Common mismatch reasons
- Invoice uploaded in wrong period or wrong GSTIN.
- B2C vs B2B classification errors by supplier.
- Credit notes not reflected or duplicate invoices.
- ISD credits and imports reported in separate tables.
Reversals and Rule 42/43
| Trigger | Action |
|---|---|
| Non-payment to supplier within 180 days | Reverse ITC + interest; reclaim on payment |
| Exempt / non-business use | Proportionate reversal per rules |
| Credit note after ITC availed | Adjust in return or reverse |
| Supplier defaults (Section 16(4) time limit) | ITC lapse if not availed within prescribed period |
Departmental verification and best practices
Rule 86B restricts use of ITC in electronic credit ledger where taxable supplies are below threshold — cash payment of tax required for the differential percentage. Monitor ITC balance vs turnover monthly.
- Vendor onboarding with GSTIN validation and return filing track record.
- Segregate capital goods ITC and reversal of common credits.
- Align ITC with income-tax expense recognition where MSME 43B(h) applies.
General professional information only. GST law and rules change frequently; verify notifications for your period.