What is reverse charge mechanism under GST?

Reverse charge mechanism (RCM) under GST means the recipient of goods or services pays the tax to the government, instead of the supplier. In the usual forward-charge case, the supplier collects GST on the invoice and remits it. Under reverse charge, the buyer (recipient) is treated as the person liable to pay that GST for notified or specified supplies.

This article explains RCM in plain language for Indian MSMEs. It is an explainer, not tax advice. Always check the latest notifications on the GST portal and confirm edge cases with a chartered accountant.

Forward charge vs reverse charge

• Forward charge: Supplier charges GST on the tax invoice and pays it through returns.
• Reverse charge: Recipient pays GST on the supply. The supplier does not collect that GST from the buyer in the same way.

RCM exists so tax is collected where the law finds it more practical — for example on certain notified supplies, or on imports of services where the overseas supplier is outside the GST net.

Where RCM comes from in law

Indian GST law provides reverse charge mainly through:

• Section 9(3) of the CGST Act (and the matching IGST provision) — the government may notify categories of goods or services where the recipient must pay tax on reverse charge.
• Section 9(4) of the CGST Act (and the matching IGST provision) — covers certain supplies from an unregistered supplier to a registered person, only when the current law and notifications make that liability apply.

Notified lists and exemptions change over time. Do not rely on an old flyer or blog list alone — use gst.gov.in, cbic-gst.gov.in, and current rate notifications.

Everyday situations MSMEs often meet

These are common notification families many businesses discuss with their CA. Whether RCM applies to *your* bill depends on the exact supply, the parties, and the current notification:

• Certain goods transport (GTA) services when the recipient is a notified class of business
• Legal services by an advocate or firm of advocates to a business entity
• Sponsorship services to a body corporate or partnership firm
• Services by a director to the company or body corporate
• Import of services from a supplier outside India (recipient in India often pays under reverse charge)
• Other notified goods or services (for example some supplies involving agriculturists or government bodies, where notified)

If you are unsure whether a purchase is reverse-charge, stop and check before booking it as a normal taxable purchase with forward-charge ITC.

Who pays, and can you use ITC?

Under reverse charge:

1. The recipient calculates and pays the GST liability.
2. Payment is made through the electronic cash ledger (you cannot discharge reverse-charge liability by using input tax credit).
3. After you pay, you may be able to claim ITC of that GST, if you are otherwise eligible under ITC rules.

So RCM often means: pay in cash first, then claim credit if allowed — not “skip tax.”

A person who becomes liable to pay tax only under reverse charge may also have registration consequences. Threshold rules that apply to normal outward supplies do not simply wipe away reverse-charge obligations. Confirm registration needs with your CA when RCM applies regularly.

What the invoice and books must show

GST invoice rules require the document to state whether tax is payable on reverse charge. Buyers and sellers both need a clear trail:

• Mark the supply as reverse charge where applicable
• Keep the supplier’s invoice or equivalent document
• Record taxable value, tax rate, and tax amount in your books
• Report reverse-charge supplies in the correct GST return tables for your filing pattern

Wrong marking leads to wrong GSTR reporting and ITC mismatches.

Simple example

A registered manufacturer in Maharashtra receives a notified service that attracts reverse charge. The supplier’s bill may show the service value without collecting GST from the manufacturer. The manufacturer pays GST to the government on that value under RCM (CGST+SGST or IGST as place of supply requires), through cash, then claims ITC if eligible.

Exact rates and notification coverage must match the service and the latest law — this example only shows the cash-flow idea.

Time of supply (high level)

For reverse charge, time of supply follows recipient-side rules that differ from ordinary forward-charge sales. In broad terms, liability timing can turn on receipt of goods or services, payment dates, and invoice dates as the Act sets out for RCM. Use the statute/rules (or your accountant’s checklist) for the due period — do not invent due dates from memory.

How organised billing helps

Reverse charge is easy to miss when purchase bills sit in WhatsApp chats and paper folders. Clear purchase records, party GSTIN, place of supply, and a reverse-charge flag on the document help you:

• Spot RCM purchases before return filing
• Keep cash-ledger payments and ITC claims aligned
• Hand your CA a consistent trail for GSTR-1 / GSTR-3B review

Billoxy is GST billing and invoicing software for Indian MSMEs. Sales and purchase documents can capture tax choices including reverse charge where the product supports it, so your books stay structured for compliance work — without replacing your CA.

Related Billoxy guides

• What is a GST invoice?
• How to claim input tax credit under GST
• Difference between CGST, SGST, and IGST
• Mandatory fields in a GST invoice

Official sources

• GST portal
• CBIC GST
• GST Council educational flyer on reverse charge (concept overview; verify against current notifications): Reverse Charge Mechanism (PDF)

FAQs

Is reverse charge the same as TDS under GST?

No. Reverse charge is a way of paying GST on a supply. GST TDS is a separate withholding mechanism that applies only in cases the law names. Do not treat them as the same entry in your books.

Can composition dealers use reverse charge the same way?

Composition scheme dealers follow special rules for tax payment and documents (often a bill of supply). Reverse-charge liability and credit eligibility can differ. Confirm with your CA before assuming normal RCM ITC behaviour.

Does every purchase from an unregistered person attract RCM?

Not automatically. Section 9(4) and related notifications have been amended and limited over time. Check the current notification position for your category of supply — do not apply an old blanket rule.

What to do next

Need one GST invoice now? Use the GST invoice generator. For ongoing GST billing, invoicing, and purchase records for Indian MSMEs, start with Billoxy (10-day trial).