Who must register for GST regardless of turnover?
Which persons must register for GST irrespective of the turnover threshold under section 24 of the CGST Act, including inter-state suppliers, casual and non-resident taxable persons, reverse-charge payers, and e-commerce operators.
In this guide
Section 24 of the CGST Act requires certain persons to register for GST regardless of the turnover threshold in section 22. These include persons making inter-state taxable supply, casual taxable persons, persons liable to pay tax under reverse charge, non-resident taxable persons, persons required to deduct TDS or collect TCS, e-commerce operators, and persons supplying through an e-commerce operator. For them the ₹20 lakh or ₹40 lakh threshold does not apply, so registration is mandatory from the first supply.
What does section 24 require?
Section 24 of the CGST Act overrides the turnover threshold for certain categories of person. Section 24 opens with a non-obstante clause, so notwithstanding the threshold in section 22, the listed persons must register whatever their turnover.
The idea is that some activities carry a compliance risk that does not depend on size. An inter-state supplier of goods or a person collecting tax at source is brought into the net from the first supply, not once a turnover line is crossed.
Who must register regardless of turnover?
Section 24 sets out the categories. Each one must register even if turnover is below the threshold that would otherwise apply.
| Category | Note |
|---|---|
| Inter-state taxable supply | Goods; notified relief for services up to threshold |
| Casual taxable person | Occasional supply with no fixed place |
| Reverse-charge payer | Recipient liable to pay the tax |
| Non-resident taxable person | Limited-period registration |
| TDS or TCS deductor | Under section 51 or 52 |
| E-commerce operator and its sellers | Where TCS under section 52 applies |
How does this differ from the threshold rule?
Section 22 sets the ordinary rule: a supplier registers once aggregate turnover crosses ₹20 lakh, or ₹40 lakh for a supplier of goods only in the notified states. Section 24 sits above that, listing persons who register regardless of turnover.
So the two are read together. If a person falls in a section 24 category, the threshold is irrelevant and registration is mandatory. If not, the section 22 threshold decides. For the threshold itself, read our GST registration threshold guide.
What about casual and non-resident persons?
A casual taxable person supplies occasionally in a territory where they have no fixed place of business, such as at a trade fair. A non-resident taxable person supplies in India without a fixed place here. Both register under section 24 regardless of turnover.
For both, registration is granted for a limited period and requires an advance deposit of the estimated tax liability. The registration can be extended, but it is not the open-ended registration an ordinary resident supplier holds.
Do e-commerce sellers have to register?
An e-commerce operator required to collect tax at source under section 52 must register, and so must a person supplying through such an operator where TCS applies. So both the platform and the seller on it can be pulled into compulsory registration.
There is a notified relief for small suppliers of goods through e-commerce operators, subject to conditions, so the position turns on whether the supply is of goods or services and whether the relief conditions are met. The default without the relief is that the seller registers.
How do I confirm I must register?
- Check whether any activity falls in a section 24 category.
- If it does, register regardless of the section 22 threshold.
- For inter-state services or e-commerce goods, check the notified relief before assuming registration is forced.
- For casual or non-resident status, plan for limited-period registration and advance tax deposit.
- Register before the first supply that triggers the obligation.
Where do businesses go wrong?
- Relying on the turnover threshold while making inter-state supply of goods.
- Assuming a reverse-charge recipient below the threshold need not register.
- Treating a casual event supply as outside GST.
- Missing the e-commerce seller registration where TCS applies.
- Not planning the advance tax deposit for casual or non-resident registration.
Where are registration rules published?
Compulsory registration sits in section 24 of the CGST Act, the threshold in section 22, and the notified reliefs in CBIC notifications. For the registration process itself, read our GST registration process guide, and for ending a registration, our GST registration cancellation guide. Complied AI keeps CBIC / GST updates in one feed so you can open the notification behind a relief and read section 24 next to it.
Practical checks
Common questions
Who must register for GST regardless of turnover?
Section 24 lists them: persons making inter-state taxable supply, casual taxable persons, persons liable under reverse charge, non-resident taxable persons, persons required to deduct TDS under section 51 or collect TCS under section 52, input service distributors, e-commerce operators, persons supplying through an e-commerce operator required to collect TCS, and persons supplying online information database access or retrieval services from outside India to an unregistered person in India.
Does the GST turnover threshold apply to an inter-state supplier?
No, for goods. A person making an inter-state taxable supply of goods must register under section 24 regardless of turnover, so the ₹20 lakh or ₹40 lakh threshold does not help them. There is a notified exemption for inter-state supply of services up to the threshold, so a small service provider supplying inter-state is not automatically forced to register.
What is a casual taxable person under GST?
A casual taxable person is one who occasionally supplies goods or services in a territory where they have no fixed place of business, such as at an exhibition or a seasonal event. They must register under section 24 regardless of turnover, and the registration is valid for a limited period with advance deposit of estimated tax.
Do I need GST registration if I only pay tax under reverse charge?
Yes. A person liable to pay tax under reverse charge must register under section 24 regardless of turnover. Being a recipient who pays the tax rather than a supplier who collects it does not remove the obligation, so a business that receives reverse-charge supplies must register even below the threshold.
Must a seller on an e-commerce platform register for GST?
A person supplying through an e-commerce operator who is required to collect TCS under section 52 must register under section 24. There is a notified relief for small suppliers of goods through e-commerce operators subject to conditions, so the exact position depends on whether the supply is goods or services and whether the conditions are met.
Does a non-resident taxable person register like others?
A non-resident taxable person must register under section 24 regardless of turnover, but through a distinct process. Registration is for a limited period, requires advance deposit of estimated tax, and does not need a PAN in the ordinary way, reflecting that the person has no fixed place of business in India.
Is an e-commerce operator itself required to register?
Yes. An e-commerce operator required to collect tax at source under section 52 must register under section 24 regardless of turnover. The operator's TCS obligation on the supplies made through its platform is a separate ground for compulsory registration from any supplies it makes on its own account.
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How this guide was prepared
This guide is published by the Complied AI research desk. Its source list and stated position were checked against the official records shown below on 16 September 2026.
Automation, including AI, may assist research, drafting and structure. It does not replace the official record or amount to an independent professional review. Read our editorial standards and corrections policy.
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