Under the normal GST framework, the supplier collects tax from the buyer and deposits it with the government. The reverse charge mechanism (RCM) under GST flips this: for specific categories of supply, the recipient of goods or services becomes liable to pay the tax directly, instead of the supplier.
RCM trips up a lot of businesses because the liability doesn't show up on a supplier's invoice - it is something the buyer has to identify, self-account for, and pay. This guide explains how RCM works, where it typically applies, and how to stay compliant.
What is reverse charge under GST
Ordinarily, the person supplying goods or services charges GST on the invoice and remits it. Under reverse charge, that responsibility shifts to the recipient. The recipient computes the tax at the applicable rate, pays it, and - where eligible - can claim it back as input tax credit in a later step.
The two broad categories of RCM
Notified categories of supply
The government notifies specific categories of goods or services on which reverse charge applies, regardless of who the supplier is. Commonly cited examples include services from a goods transport agency, legal services from an advocate or firm of advocates, services provided by a director to their company, sponsorship services, and import of services. This notified list is amended from time to time, so treat any list - including this one - as illustrative, and verify the current notified categories on the GST portal or the relevant CBIC notification before relying on it.
Supplies from unregistered persons
Separately, reverse charge can apply when a registered person receives specified supplies from an unregistered supplier. The scope of this provision has changed over time and, in practice, is now largely restricted to specific notified situations rather than applying broadly to all unregistered purchases. Because this is an area where the rules have shifted, do not assume a purchase from an unregistered vendor automatically triggers RCM - check current applicability before treating it that way.
How RCM works, step by step
- Identify whether the supply you are receiving falls under a notified RCM category.
- If the supplier is unregistered and the transaction is a covered RCM situation, prepare a self-invoice, since the supplier will not issue a normal GST invoice.
- Compute the tax at the rate applicable to that supply.
- Pay the RCM liability through the electronic cash ledger - importantly, you cannot use your existing input tax credit balance to settle an RCM liability; it must be paid in cash.
- Where the supply is used for taxable business purposes and normal ITC conditions are met, claim the tax paid under RCM as input tax credit.
- Report the RCM liability and the corresponding credit in the relevant tables of your GSTR-3B for the period.
RCM and input tax credit
Tax paid under reverse charge is generally available as input tax credit, provided the supply is used in the course of business and the usual eligibility conditions are met - the same conditions that apply to any other ITC claim. Because RCM credit is easy to under-claim, it is worth reviewing our guide on ITC reversal rules alongside your RCM workings each period.
Self-invoicing and payment vouchers
When you owe tax under RCM on a purchase from an unregistered supplier, you are expected to issue a self-invoice covering that receipt of goods or services, and a payment voucher when you make the payment to the supplier. These documents are part of your own compliance record - the supplier does not generate them for you. If you already prepare GST-compliant invoices for your outward supplies, treat self-invoicing with the same discipline; see our guide on creating a GST-compliant invoice for the fields a valid document needs.
Illustrative RCM scenarios
The table below is illustrative only - always confirm against the current notified list before applying it to a real transaction.
| Scenario | Who is typically liable | Note |
|---|---|---|
| Freight paid to a goods transport agency | Recipient (business paying the freight) | Common RCM category for businesses moving inventory |
| Legal services from an advocate or law firm | Recipient business | Applies to fees paid for legal services received |
| Import of services from outside India | Recipient in India | Recipient self-accounts for tax on the import |
| Sponsorship services received by a company | Recipient company | Common in event and marketing arrangements |
Common RCM compliance mistakes
- Trying to net off RCM liability against available ITC balance instead of paying it in cash
- Skipping self-invoicing for unregistered-supplier purchases that fall under a covered RCM category
- Missing the RCM entry in GSTR-3B, or reporting it in the wrong table
- Not tracking RCM purchases separately in the books, making the monthly reconciliation harder than it needs to be
- Assuming an old notified list is still current - RCM categories and rates are revised periodically
Keeping RCM manageable
Because RCM liability doesn't arrive as a line item on someone else's invoice, the businesses that handle it well are usually the ones that tag RCM-relevant purchases at the point of entry into their books, rather than trying to reconstruct them at return time. If you're building out your books using accounting software, flagging RCM-applicable purchase ledgers early makes the GSTR-3B computation far less error-prone.
When does the RCM liability actually arise
The point in time at which RCM liability arises - generally referred to as the time of supply - follows its own set of rules under GST, which can differ from the time of supply for a normal forward-charge transaction. In broad terms, it is typically linked to events like the date of payment or the date of receipt of goods or services, whichever set of triggers the relevant provision specifies, subject to a backstop timeline if none of those events occur promptly. Because getting this date wrong can mean paying RCM tax in the wrong return period, it's worth confirming the current time-of-supply rule for RCM rather than assuming it always matches your invoice or purchase date.
RCM for CA firms managing multiple clients
If you handle GST compliance for several clients, RCM is one of the areas most likely to be missed during month-end review, simply because it depends on the nature of a purchase rather than anything visible on a supplier's GSTIN status. Building a standard checklist - goods transport agency freight, professional fees from certain categories of service providers, sponsorship, and imports of services - into your client onboarding and monthly review process reduces the chance of an RCM entry slipping through unnoticed across a multi-client workload.
Frequently asked questions
Can I use input tax credit to pay RCM tax liability?
No. RCM liability must be paid through the electronic cash ledger; it cannot be settled by adjusting against your existing ITC balance.
Is self-invoicing mandatory under RCM?
Yes, when you receive a covered supply from an unregistered supplier under RCM, you are expected to issue a self-invoice, since the supplier will not provide a standard GST invoice.
Does RCM apply to all purchases from unregistered dealers?
No, this is a common misconception. RCM on supplies from unregistered persons is now largely limited to specific notified situations rather than applying broadly. Verify current applicability before assuming a purchase is covered.
Where do I report RCM liability in GSTR-3B?
RCM liability and the related eligible credit are reported in the specific tables of GSTR-3B meant for reverse charge supplies; check the current return format and instructions on the GST portal.
Can I claim input tax credit on tax paid under RCM?
Generally yes, provided the supply is used for eligible business purposes and the standard ITC conditions are satisfied, in the same way as credit on any other purchase.
Recording reverse-charge transactions in your books
RCM is as much a bookkeeping problem as a tax one. The liability sits with the recipient, the payment often shows up only as a bank debit, and the corresponding input tax credit may be claimed in a later period — so the same transaction has to stay traceable across the bank statement, the purchase record and the return.
This is where the bank side matters. OneBooks GST parses bank statement PDFs and Excel files into dated transaction rows carrying narration, debit, credit and balance, then applies ledger mapping so recurring narrations post to the right account. Freight, legal fees and other common reverse-charge payments are far easier to identify and treat correctly when they arrive as mapped ledger rows rather than as untyped lines in a spreadsheet. OneBooks GST also supports multi-GSTIN organisations, which matters when reverse charge applies under one registration but not another.
Automating the repetitive parts with OneBooks GST
OneBooks GST is a GST and accounting platform for Indian businesses. It imports sales data, prepares GSTR-1, parses bank statements, and exports to Tally XML, Miracle, Profit NX, Excel and CSV.
OneBooks GST keeps source data, reviewed output and exports as separate records, so a figure can be traced back rather than reconstructed.
