RCM (Reverse Charge Mechanism) under GST — Complete Compliance Guide for FY 2025-26

1. What is Reverse Charge Mechanism (RCM) under GST?

In the normal GST framework, the supplier collects tax from the buyer and deposits it with the government. Simple enough. But in certain situations — particularly where the supplier is unregistered, operating in an informal sector, or providing a service that the government wants to closely monitor — this chain breaks down.

To plug this gap, the GST law introduced the Reverse Charge Mechanism: a provision where the recipient (buyer) becomes responsible for paying the GST directly to the government, bypassing the supplier entirely.

So when you — a registered GST taxpayer — receive a GTA service, hire an advocate, or import a digital service from abroad, you must calculate the applicable GST, issue a self-invoice, pay the tax from your cash ledger, and declare it in your GSTR-3B. The supplier has zero involvement in the tax payment.

2. Legal Basis — Section 9(3) and Section 9(4) of CGST Act

The RCM mandate under GST derives from two separate provisions of the CGST Act, 2017, and corresponding IGST Act provisions:

Section 9(3) — Notified Goods and Services

Under Section 9(3), the government notifies specific categories of goods and services where RCM always applies, regardless of whether the supplier is registered or not. The CBIC issues these notifications from time to time. As of FY 2025-26, the primary notification governing this is Notification No. 13/2017 – Central Tax (Rate) for services and Notification No. 04/2017 – Central Tax (Rate) for goods.

Section 9(4) — Purchases from Unregistered Suppliers

Section 9(4) originally applied to all purchases from unregistered persons. However, following industry-wide difficulty, it was limited by Notification No. 38/2017 – Central Tax (Rate) and has since been applicable only to specific notified goods (like raw cotton, tobacco leaves, silk yarn, and certain other agricultural produce) when purchased by a registered taxpayer from an unregistered dealer.

3. Complete List of Supplies Under RCM (FY 2025-26)

The following are the most commonly applicable RCM supplies for SMEs under Notification No. 13/2017 – CT(R) as amended:

4. Time of Supply under RCM

Knowing when your RCM liability arises is critical — it determines which month’s GSTR-3B you must declare and pay the tax in. The time of supply rules for RCM differ from normal forward charge and are governed by Section 12(3) for goods and Section 13(3) for services of the CGST Act.

5. Self-Invoice — When and How to Issue

When you receive a supply from an unregistered supplier under RCM, the supplier cannot issue a proper tax invoice (since they’re unregistered). In this case, you as the registered recipient must issue a self-invoice on the date of receipt of goods/services.

This is mandated by Rule 47A of the CGST Rules, 2017. A self-invoice essentially means you create the invoice yourself, acting as both buyer and document issuer.

What must a Self-Invoice contain?

• The words “Tax Invoice” (or “Self Invoice under RCM”) prominently displayed
• Your own GSTIN as the supplier’s GSTIN (since you are generating it)
• Name, address, and GSTIN of the recipient (your own details)
• Supplier’s name and address (even though they are unregistered)
• Date of self-invoice (date of receipt of supply)
• Description of goods/services, HSN/SAC code, quantity, value
• Applicable GST rate and amount (CGST + SGST or IGST)
• Unique sequential invoice number (you maintain this series)

6. How to Report RCM in GSTR-1 and GSTR-3B

Reporting in GSTR-3B

GSTR-3B is where your RCM payment obligation gets declared and the tax gets paid. Here is the exact table-wise flow:

Reporting in GSTR-1

If you issued self-invoices for unregistered supplier purchases (Section 9(4) RCM), those self-invoices need to be reported in GSTR-1 Table 4B (B2B – supplies made to unregistered persons — but here you report your own self-invoice). For Section 9(3) supplies (GTA, advocate, etc.), the reporting is primarily through GSTR-3B Table 3.1(d) only — GSTR-1 reporting is not always required for these, but self-invoices must be maintained in records.

7. ITC on RCM — Eligibility and Restrictions

Here’s the good news: for most registered businesses, RCM is tax-neutral. You pay the GST in cash, then claim it right back as ITC. But there are several conditions and restrictions that determine whether ITC is actually available to you.

Conditions for ITC Eligibility on RCM (Section 16)

• You must be a regular registered taxpayer (not composition dealer)
• The supply must be used for business purposes (not personal use)
• The supply should not be in the blocked credit list under Section 17(5) — for example, RCM paid on motor vehicle hire for personal use of directors is blocked
• The RCM tax must have been actually paid in cash — unpaid RCM tax cannot be claimed as ITC
• You must have the self-invoice or supplier’s invoice as supporting document

When Can ITC Be Claimed?

ITC on RCM can be claimed in the same return period in which the RCM tax is paid, or in any subsequent period before the annual return filing deadline. Many taxpayers unnecessarily delay ITC claims — there is no rule requiring you to wait until the next period. Pay in February GSTR-3B, claim ITC in February GSTR-3B itself.

8. GTA (Goods Transport Agency) — Detailed RCM Rules

GTA is probably the single most common RCM scenario for Indian SMEs. Nearly every manufacturing or trading company hires transporters. Here’s how the rules actually work:

When Does GTA Attract RCM?

A Goods Transport Agency (GTA) that issues a consignment note for road transportation of goods attracts RCM when:

• The GTA charges GST at 5% without ITC (the default rate for most GTAs)
• The recipient is a factory, registered person, body corporate, partnership firm, AOP, or society

The Forward Charge Option for GTAs

From FY 2023-24 onwards, GTAs can opt to pay GST under forward charge — meaning they collect and deposit GST themselves. If a GTA exercises this option (by filing an annual declaration on the GST portal by 15 March of the preceding year), then RCM does not apply for that year and the GTA charges you GST directly on their invoice.

Always ask your transporter at the beginning of each financial year whether they have opted for forward charge. If they have, you do not need to pay RCM — their invoice will include GST. If they haven’t, you pay RCM at 5% on freight value.

9. Penalties for Non-Compliance

RCM is one area where GST officers specifically look during scrutiny and audits, because non-compliance is widespread among SMEs who simply don’t know the rules. Here are the consequences if you miss RCM payments:

• Interest under Section 50: 18% per annum on unpaid RCM tax, calculated from the day it was due until actual payment. On ₹6,000 of GTA RCM unpaid for 12 months, that’s ₹1,080 in interest alone — plus you still owe the principal.
• Penalty under Section 122(1)(b): Failure to pay tax as a recipient under RCM attracts a penalty of ₹10,000 or 100% of tax due, whichever is higher, per default.
• ITC Denial: Under Section 16(2), ITC cannot be claimed if the underlying tax has not been paid. So if you skipped RCM payment for a year, all the ITC you might have claimed is also invalid — this compounds the financial damage significantly.
• GSTR-3B Mismatch: GSTN’s AI flags gaps between e-invoice data, e-way bills, and GSTR-3B declarations. If you received GTA services but Table 3.1(d) shows zero, it triggers automated scrutiny notices under Section 61.

10. Common Errors and How to Avoid Them

Monthly RCM Compliance Checklist

• Listed all GTA payments made during the month and verified forward charge status
• Listed all advocate/legal fees, director fees, security services payments
• Identified all purchases from unregistered vendors (if applicable under Sec 9(4))
• Checked all foreign invoices (SaaS, software, consulting) for IGST RCM applicability
• Issued self-invoices for all unregistered supplier purchases
• Deposited RCM tax amount in Electronic Cash Ledger via PMT-06 before GSTR-3B due date
• Declared correct amount in GSTR-3B Table 3.1(d)
• Claimed eligible ITC in GSTR-3B Table 4(A)(3) — same period
• Verified no blocked credit (Section 17(5)) in ITC claim
• Stored all self-invoices and GTA bills as records for 6 years

11. Frequently Asked Questions