Blocked Credit and Reverse explained: this guide covers what it means, who it applies to, the step-by-step process, documents required, fees, due dates and penalties in India — so you can stay compliant with confidence and avoid costly mistakes.
Reverse charge is usually revenue-neutral — you pay the tax and take the credit. Where the underlying supply is blocked under s.17(5), it is not neutral at all. It is a cash cost with no offset.
Section 17(5) opens with a non-obstante clause over s.16(1) and blocks credit in respect of the supply, not by reference to who paid the tax. So where a supply is blocked, RCM tax on it is paid in cash and is not creditable. The liability is real; the credit is not. Several notified RCM services fall into blocked categories, and the exposure accumulates quietly because the payment and the non-credit sit in different parts of the return.
Why the two provisions produce this result
Reverse charge decides who pays. Sections 9(3) and 9(4) shift the liability from supplier to recipient. Nothing in either section says anything about credit.
Section 17(5) decides whether credit is available for a supply. Its language is "input tax credit shall not be available in respect of the following" — a description of supplies, not of payers.
So the two operate independently, and where they meet, the recipient:
- pays the tax in cash, because s.49(4) does not permit RCM liability to be discharged from the credit ledger;
- takes no credit, because s.17(5) blocks it.
ITC on reverse charge supplies →
Where it actually happens
Renting of motor vehicles. The notified RCM entry covers renting of a motor vehicle designed to carry passengers, where the cost of fuel is included, supplied by a person other than a body corporate to a body corporate, and the supplier does not charge at the rate that permits credit. The recipient pays under RCM — and clause (b)(i) blocks credit on leasing, renting or hiring of motor vehicles referred to in clause (a) unless used for a permitted purpose.
A company hiring cars for its employees therefore pays RCM in cash and gets nothing back. This is the single largest instance in practice. Leasing, renting and hiring →
Sponsorship services. Notified under RCM where supplied by any person to a body corporate or partnership firm. Sponsorship of a sporting or cultural event is usually a marketing spend and creditable — but where it is in substance a CSR activity, clause (fa) blocks it.
Legal services from an advocate. Notified under RCM. Creditable in the ordinary case — but where the legal service relates to a construction project, the underlying blocked-ness of the project does not extend to legal advice; the advice is not a good or service received for construction in the clause (d) sense unless it is design or supervision.
Security services. Notified under RCM where supplied by a person other than a body corporate to a registered person. Ordinarily creditable. Blocked only where the security is for a blocked purpose — a personal residence, for example.
Services from a director. Notified under RCM. Creditable, unless the service is personal to the director in a way that engages clause (g).
Goods transport agency services. Notified under RCM in the specified cases. Creditable in the ordinary course of business.
Where it does not happen
Two common misconceptions:
"RCM overrides the block." It does not. Paying the tax yourself does not create an entitlement that s.17(5) has removed.
"The block means no RCM is payable." It does not. The liability arises from s.9(3) or s.9(4), which are indifferent to the credit position. Not paying because the credit is unavailable produces interest under s.50(1) on top of the tax.
Both errors are made regularly, and they are opposite in direction — one over-claims, the other under-pays.
Practical handling
- Map the notified RCM list against s.17(5) once, and flag the intersections in the accounts payable system.
- Budget for the cash cost. RCM on blocked supplies is a permanent expense line, not a working capital timing item.
- Report it correctly. The liability goes in GSTR-3B Table 3.1(d); the non-credit is disclosed in Table 4(D)(1) as ineligible under s.17(5) — not in Table 4(A) and then reversed.
- Check the vehicle first. The RCM entry for renting of motor vehicles and clause (a) both turn on the vehicle. A coach with 14 or more approved seats is outside clause (a), so RCM on its hire — where applicable — is creditable. Section 17(5)(a) →
- Check the obligatory proviso. Where the transport is legally mandated, clause (b)'s proviso restores the credit even though the tax was paid under RCM. The obligatory-under-law proviso →
Key takeaways
- s.17(5) blocks credit by reference to the supply, not to who paid the tax.
- RCM on a blocked supply is paid in cash with no credit — a pure cost.
- Renting of motor vehicles is the largest practical instance.
- The block does not remove the RCM liability — non-payment attracts interest.
- Report the liability in Table 3.1(d) and the non-credit in Table 4(D)(1).
- The 14-seat exit and the obligatory-under-law proviso both restore credit where they apply.
Read next
- ITC on Reverse Charge: Timing, Documents and the Cash Rule
- Leasing, Renting and Hiring of Motor Vehicles
- The "Obligatory Under Any Law" Proviso
- Reverse Charge Mechanism Under GST: Complete Guide
Disclaimer: Positions stated as on 5 September 2026, based on the CGST Act as amended to 31 March 2026 (ICAI Bare Law, 12th edition) and the ICAI Handbook on Blocked Credit under GST (November 2025). Verify the current RCM notification entries before applying them.