Reverse Charge Mechanism (RCM) in GST: Rules and Compliance Guide

Usually, in the world of indirect taxes, the supplier of goods or services is the one responsible for collecting tax from the buyer and depositing it with the government. However, the Goods and Services Tax (GST) law contains a significant exception called the Reverse Charge Mechanism (RCM).

Under RCM, the statutory liability to pay the tax is flipped: the recipient (buyer) of the goods or services must pay the GST directly to the government, rather than paying it to the supplier.

For businesses, RCM is a high-risk compliance area. Because the tax isn't listed on the supplier's invoice, it is often missed during manual accounting, leading to massive interest penalties during departmental audits.

This guide explains the mechanics of RCM, the specific services covered under Section 9, and the mandatory payment rules for the 2026 Assessment Year.

What is Reverse Charge Mechanism?

Reverse Charge is defined under Section 2(98) of the CGST Act. It shifts the tax burden from the seller to the buyer.

There are two primary scenarios where RCM triggers:

1. Section 9(3): Specific goods and services notified by the government (e.g., Legal services, GTAs).
2. Section 9(4): Purchases made by a registered person from an unregistered dealer (currently restricted to specific sectors like Real Estate).

The "Cash Only" Rule

The most critical rule of RCM is that you cannot use your Input Tax Credit (ITC) balance to pay your RCM liability. RCM must always be paid in 100% Cash using the Electronic Cash Ledger. You can then claim that cash payment back as ITC in the same or subsequent month.

Key Services Covered Under RCM (Section 9(3))

The government has notified a specific list of services where the buyer must always pay the GST. The most common ones for businesses include:

1. Legal Services by Advocates

If a business entity (with turnover exceeding the registration limit) hires a lawyer or a law firm for legal advice or litigation, the business must pay the GST under RCM. The lawyer will not charge GST on their bill.

2. Goods Transport Agency (GTA)

When a business hires a truck for transport:

• If the GTA chooses to pay 5% GST, the business (recipient) must pay it under RCM.
• If the GTA chooses the 12% Forward Charge, the GTA collects the tax on the invoice, and RCM does not apply.

3. Sponsorship Services

If your company sponsors an event (like a cricket match or a local festival) and receives brand visibility, the company must pay GST on the sponsorship fee under RCM.

4. Services by Government or Local Authority

Most services provided by the government to a business (like renting of premises or spectrum usage fees) fall under RCM, unless they are specifically exempted or related to the postal department/transport of goods.

RCM on Import of Services

Whenever an Indian business buys a service from a foreign provider (like a software subscription, a consultant in London, or a designer on Fiverr), it is legally treated as an "Import of Service."

Under the IGST Act, the Indian recipient is the "deemed importer" and must pay Integrated GST (IGST) under RCM. This applies even if the foreign provider has no office in India.

Mandatory Self-Invoicing

Because your supplier (the lawyer or the unregistered dealer) is not issuing a Tax Invoice, you must create one yourself.

Under Section 31(3)(f), a registered person liable to pay tax under RCM must:

1. Issue an Invoice in respect of the goods or services received from the supplier on the date of receipt.
2. Issue a Payment Voucher at the time of making payment to the supplier.

Tip: Most modern ERPs and accounting software like Tally or Zoho have a "Self-Invoice" feature that automates this requirement.

Legal Reference

Relevant Law: Section 9(3) and 9(4) of the CGST Act, 2017 govern RCM for domestic supplies. Section 5(3) of the IGST Act, 2017 governs RCM for inter-state and import supplies.

Claiming ITC on RCM Payments

Can you get your RCM money back? Yes.

Once you pay the RCM liability in cash through your GSTR-3B return, you can claim the full amount as Input Tax Credit (ITC).

Conditions for RCM ITC:

• The services must be used for the furtherance of business.
• You must have the Self-Invoice and Payment Voucher in your records.
• The credit must be reported in Table 4(A)(3) of Form GSTR-3B.

Common Mistakes with RCM

1. Paying RCM using ITC Balance: This is a fatal error. If you offset ₹10,000 of RCM liability using your ITC ledger in GSTR-3B, the GST department will consider the tax "unpaid." They will force you to pay the ₹10,000 again in cash along with 18% interest.
2. Missing RCM on Director's Remuneration: Many companies assume that because a director is "part of the company," their remuneration is a salary. However, the GST Council has clarified that certain payments to directors (other than pure salary) are subject to RCM by the company.
3. Ignoring Foreign SaaS Subscriptions: Small startups often pay for Zoom, Slack, or AWS using a corporate credit card. These are "Imports of Service" and require the startup to pay 18% IGST under RCM every month.

Conclusion

The Reverse Charge Mechanism is a trap for the unwary. It requires the accounts department to proactively identify "No-GST" invoices from lawyers, transporters, and foreign vendors and manually calculate the tax liability. To ensure compliance in 2026, businesses should conduct a monthly "RCM Audit" of their Profit & Loss account to catch any missing entries before the GSTR-3B deadline.