A business can become a casual taxable person under GST even when it operates in a State only for a few days. A common example is a temporary exhibition stall, trade fair counter or short project from which taxable supplies are made in a State or Union territory where the supplier has no fixed place of business.
The important point is that this is not simply a short version of ordinary GST registration. The CGST Act gives casual taxable persons a special registration framework: the application has to be planned before business starts, an advance tax deposit is built into the process, the registration has a limited validity period, and an extension requires a fresh estimate and further deposit.
First check whether the activity actually makes you a casual taxable person
Section 2(20) of the Central Goods and Services Tax Act, 2017 defines a casual taxable person as someone who occasionally undertakes transactions involving the supply of goods or services, or both, in the course or furtherance of business in a State or Union territory where that person has no fixed place of business.
That definition has two practical parts. The activity is occasional, and the supplier does not have a fixed place of business in that State or Union territory. A company with an established office or other fixed business location there may need to analyse ordinary registration instead of treating every short assignment as casual.
For the wider distinction between threshold-based, compulsory and voluntary registration, it is useful to first understand when GST registration becomes necessary. The casual-taxpayer rules are a special layer on top of that general framework.
Registration is generally compulsory, but there is a narrow notified exception
Section 24(ii) of the CGST Act lists a casual taxable person making taxable supplies among the categories that are required to register. This means the normal turnover-threshold discussion is not, by itself, enough for an ordinary casual taxable person.
There is, however, an important exception. Notification No. 56/2018-Central Tax exempts specified casual taxable persons making inter-State taxable supplies of defined handicraft goods and certain listed products, subject to the notification's conditions. Among other things, the all-India value of the covered supplies must remain within the applicable section 22 registration threshold, and the notification requires PAN and e-way bill compliance.
So a business should not use a blanket rule such as “every casual taxable person must register regardless of turnover” without checking whether a specific exemption applies to its goods and facts. The handicraft notification is targeted, not a general exemption for temporary sellers.
Apply before the temporary activity begins
The proviso to section 25 requires a casual taxable person to apply for registration at least five days before commencing business. This is one of the biggest differences from the usual 30-day registration timeline that applies in many other cases.
The GST Portal's current registration manual uses the normal registration application route for a casual taxable person. In the application, the taxpayer identifies itself as a casual taxable person and provides estimated supplies and estimated net tax liability for the temporary registration period.
Planning matters because section 27 also says a casual taxable person can make taxable supplies only after the registration certificate has been issued. Filing an application on the morning an exhibition opens does not solve the timing problem if registration has not yet been granted.
The advance payment is estimated tax, not a registration fee
Section 27(2) requires an advance deposit equal to the estimated tax liability for the period for which registration is sought. The GST Portal registration workflow uses a challan so that this amount can be deposited through the electronic cash ledger as part of the casual-taxpayer process.
This is better understood as pre-funding the expected GST liability for the temporary activity. It is not an extra tax merely because the registration is temporary, and it is not calculated simply as a percentage of expected turnover without considering the actual taxable supplies and applicable tax treatment.
Before entering the estimate, the finance team should map the expected transactions: taxable value, applicable GST rate, place of supply and any exempt or non-taxable items. The working should support the net tax liability entered on the portal instead of applying one assumed rate to the entire expected turnover. If the business model changes materially during the event, the return and cash-ledger position should be monitored rather than relying blindly on the original estimate.
The registration normally ends within 90 days unless it is extended
Under section 27(1), the registration certificate is valid for the period stated in the application or 90 days from the effective date of registration, whichever is earlier. The law also allows the proper officer, on sufficient cause being shown, to extend that period by a further period not exceeding 90 days.
An extension is not automatic. The taxpayer must act before the existing registration expires and must make an additional advance deposit equal to the estimated tax liability for the extension period. The GST Portal's official list of available GST forms identifies FORM GST REG-11 as the application for extending the registration period of a casual or non-resident taxable person.
That makes the practical sequence straightforward: estimate the required period at the start, monitor whether the temporary activity will overrun, and begin the extension process early enough to avoid a gap in registration.
A short registration still creates normal return-compliance work
Temporary status does not mean the taxpayer can ignore return filing. The GST Portal's GSTR-1 guidance expressly includes casual registered taxpayers making outward supplies. It also notes a useful exception for casual taxpayers: after the business closes, they can file GSTR-1 before the end of the current tax period instead of waiting for the period to finish.
The exact return calendar depends on the taxpayer's filing profile and portal eligibility. The important control is to complete the temporary business with the sales register, invoices, tax payment and return filings aligned. The distinction between GSTR-1 and GSTR-3B remains relevant because reporting outward supplies and discharging the resulting tax liability are separate compliance steps.
A casual taxable person also cannot use the composition levy simply to make the temporary compliance lighter. The CGST composition rules specifically require a person opting for composition to be neither a casual taxable person nor a non-resident taxable person.
Example: a temporary exhibition in another State
Assume a Delhi business plans to sell taxable products from a 12-day exhibition stall in Bengaluru and has no fixed place of business in Karnataka. On those assumptions, the temporary selling activity can fall within the casual taxable person definition for Karnataka.
The business should not wait for the stall to open. It should analyse registration in advance, apply at least five days before commencing the taxable activity, estimate the tax liability for the period and complete the required advance deposit. If the certificate is granted for the 12-day period, the business may make the taxable supplies during that validity period.
If the exhibition is unexpectedly extended, the business should not assume that the original registration simply continues. It should evaluate an extension before expiry, file the prescribed extension application and make the additional estimated-tax deposit for the extended period. If, instead, the business establishes a fixed place of business in Karnataka, the original casual-registration analysis may no longer fit the facts and ordinary registration may need to be considered.
What to prepare before filing
- Confirm the State or Union territory from which the temporary taxable supplies will be made.
- Document why there is no fixed place of business there and why the activity is occasional.
- Check whether any specific exemption, including the notified handicraft exception, applies before assuming compulsory registration.
- Fix the intended start and end dates and leave enough time for the five-day advance-application rule.
- Prepare a realistic estimate of taxable supplies and net tax liability for the requested period.
- Keep the cash needed for the advance tax deposit available before the business starts.
- Track the registration expiry date and start REG-11 extension work before expiry if the activity will continue.
- Reconcile invoices, outward-supply reporting and tax payment before closing the temporary GST compliance file.
The safest way to handle a casual registration is to treat it as a short compliance project with a defined beginning and end. First establish that the legal definition fits. Then plan registration and the advance deposit before the event, keep the 90-day statutory cap in view, and close the return cycle cleanly when the temporary activity finishes.
