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Reverse Charge Mechanism (RCM) under GST Explained

Written by: GSTBillFree Compliance Team

Fact-checked & Updated for FY 2025-26. The Reverse Charge Mechanism flips traditional taxation upside down. Our experts explain exactly when RCM applies to your business, and how to invoice correctly to stay legally compliant.

Under the normal taxation system in India, the person supplying the goods or services (the Seller) collects the tax from the buyer and deposits it with the government. This is called the Forward Charge Mechanism.

However, the Goods and Services Tax (GST) law introduced a concept called the Reverse Charge Mechanism (RCM). Under RCM, the entire process is reversed: the Buyer of the goods or services becomes directly responsible for paying the GST to the government. Let’s explore how this works and when it applies.

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Why was RCM Introduced?

The primary reason for introducing the Reverse Charge Mechanism was to bring unorganized sectors into the tax net and to increase tax compliance. For example, it is very difficult for the government to collect tax from thousands of individual truck drivers or small farmers. Instead, they make the registered companies who hire these trucks or buy from these farmers responsible for paying the tax.

When is RCM Applicable?

According to the CBIC guidelines, RCM is applicable in three main scenarios:

1. Supply of Specific Goods or Services

The government has notified a specific list of goods and services where the buyer must pay the tax.

2. Purchases from an Unregistered Dealer (URD)

If a GST-registered business buys goods or services from an unregistered supplier, the registered business must pay the GST on behalf of the unregistered seller under RCM. (Note: The government occasionally suspends or modifies this rule for specific financial years, so it is crucial to consult your CA regarding current URD rules).

3. Services through an E-Commerce Operator

If services like plumbing, carpentry, or passenger transport (e.g., Uber, Ola) are provided through an e-commerce operator, the e-commerce platform is liable to pay the GST, not the actual plumber or driver.

How to Issue an Invoice under RCM?

If you are the supplier providing goods/services that fall under RCM, you must still issue a tax invoice. However, you do not charge GST on the invoice amount.

Most importantly, as per Rule 46 of the CGST Rules, your invoice must clearly state: "Whether tax is payable on reverse charge basis - YES".

Important: If you are the registered buyer purchasing from an unregistered seller, you are required to issue a Self-Invoice and a Payment Voucher for the transaction to legally pay the RCM liability.

Can You Claim ITC on RCM?

Yes. A business that pays GST under the Reverse Charge Mechanism can claim the entire amount back as Input Tax Credit (ITC), provided that the goods or services are used for business purposes.

However, there is a catch: You cannot use your existing ITC balance to pay your RCM liability. RCM tax must be paid in cash (via electronic cash ledger). Once paid, you can claim it as ITC in the same month's GSTR-3B return.

Conclusion

The Reverse Charge Mechanism is a strict compliance area. Failing to pay RCM taxes can result in heavy penalties and interest. Whether you are generating a normal forward-charge invoice or an RCM invoice, ensuring the formatting is legally correct is paramount.

You can use GSTBillFree to generate standard PDF invoices. In the 'Notes' section of our tool, you can clearly declare "Reverse Charge Applicable" to keep your compliance perfectly aligned with government rules.

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Frequently Asked Questions (FAQs)

What is RCM in GST?
RCM stands for Reverse Charge Mechanism. Under normal circumstances, the seller collects GST and pays it to the government. Under RCM, the buyer is legally responsible for paying the GST directly to the government.
Does the buyer need to issue a self-invoice for RCM?
Yes, if the buyer is purchasing from an unregistered supplier and the transaction falls under RCM, the registered buyer must issue a self-invoice and a payment voucher.
Can I pay RCM liability using Input Tax Credit (ITC)?
No. The GST liability under the Reverse Charge Mechanism must be paid entirely in cash. However, once paid, you can claim it as ITC in the same month.