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Casual Taxable Person Registration Under GST in India

Reviewed by CA and CS Team, Patron Accounting LLP ICAI & ICSI Registered| 15+ Years Experience| Last Updated: Verify Credentials →

Documents: PAN, Aadhaar, proof of event or contract, bank details, and photo of signatory.

Fees: Starting from INR 999 (Exl GST and Govt. Charges) for end to end REG-01 filing.

Eligibility: Anyone making occasional taxable supplies in a State without a fixed place of business.

Timeline: Apply 5 days before the event; GSTIN within 7 working days after advance tax is credited.

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Casual Taxable Person Registration at a Glance

📌 TL;DR - Casual Taxable Person Registration Services at a Glance

A Casual Taxable Person under Section 2(20) of the CGST Act, 2017 is a person making occasional taxable supplies in a State or UT without a fixed place of business there. Registration is compulsory under Section 24(ii), filed in Form GST REG-01 at least 5 days before commencement, with an advance tax deposit under Section 27(2). The certificate is valid for 90 days, extendable by 90 more in Form GST REG-11.

Cross-State business activity is unavoidable for exhibitors at IITF Pragati Maidan, jewellery vendors at Bangalore trade fairs, food and beverage stalls at the Sonepur Mela in Bihar, decor and event firms running festivals in Hyderabad, civil contractors mobilising for a 60 day project site in Tamil Nadu, and SaaS firms demonstrating at India Mobile Congress. Each of these creates a tax point in a State where the supplier has no fixed place of business - and triggers Section 24(ii) compulsory registration as a Casual Taxable Person under Section 27 of the CGST Act, 2017.

Patron Accounting LLP handles end to end Casual Taxable Person registration - estimation of advance tax under Section 27(2), filing of Form GST REG-01 in the host State, deposit of advance tax through the GST challan, monitoring of the 90 day validity, Form GST REG-11 extension where the event runs longer, filing of GSTR-1 and GSTR-3B during the validity window, and recovery of unutilised advance tax through Form GST RFD-01 after surrender or expiry.

Content is reviewed quarterly for accuracy.

What Is a Casual Taxable Person?

A Casual Taxable Person under Section 2(20) of the CGST Act, 2017 is a person who occasionally undertakes transactions involving the supply of goods or services, or both, in the course or furtherance of business, whether as principal, agent or in any other capacity, in a State or Union Territory where he has no fixed place of business.

The definition has three elements. First, the supplies are occasional, not the regular course of business. Second, the supplies are made in a State or UT outside the supplier's home jurisdiction. Third, there is no fixed place of business in that State or UT. All three must coexist for the CTP route to apply. Where any one fails - for example, a continuous warehouse in the host State - the supplier needs a regular registration in that State under Rule 8, not a CTP registration.

Section 24(ii) makes registration as a Casual Taxable Person compulsory regardless of the aggregate turnover thresholds in Section 22. Section 27(1) requires the CTP to obtain the registration certificate before making any taxable supply, and Section 27(2) requires an advance deposit of tax equal to the estimated GST liability for the period of registration. The certificate is valid for the period specified in the application or 90 days from the effective date, whichever is earlier, with a single extension of up to 90 more days under the proviso to Section 27(1).

Key Terms for Casual Taxable Person Registration:

  • Casual Taxable Person (CTP): Defined under Section 2(20) of the CGST Act, 2017 - a person making occasional supplies in a State or UT without a fixed place of business there.
  • Fixed Place of Business: A place from which business is ordinarily carried on with a degree of permanence. A weekend exhibition stall is not fixed; a leased office or warehouse is.
  • Advance Tax (Section 27(2)): A deposit equivalent to the estimated tax liability for the registration period, paid before the certificate is granted and credited to the electronic cash ledger under Section 27(3).
  • Form GST REG-01: The same standard application form used for regular registration. CTP is selected as the registration type in Part A.
  • Form GST REG-11: The application for extension of validity of a CTP or NRTP registration. It must be filed before the existing 90 day period expires, accompanied by additional advance tax.
  • Form GST RFD-01: The refund application for unutilised balance in the electronic cash ledger, used to claim back excess advance tax after the certificate period ends.
APL-05 Casual Taxable Person Registration
Validity 90 + 90 Days

Applicability and Use Cases

Casual Taxable Person registration is mandatory whenever a supplier makes a taxable supply in a State or UT where it does not have a fixed place of business, regardless of turnover.

Who Must Register as a CTP

  • Exhibitors at trade fairs and expos in another State (IITF Pragati Maidan, Auto Expo Greater Noida, Aero India Bengaluru)
  • Festival, mela and event vendors (Sonepur Mela Bihar, Surajkund Mela Haryana, Pushkar Fair Rajasthan)
  • Civil contractors mobilising for a temporary site or project in another State for 60 to 180 days
  • Event management and decor firms running weddings, concerts or corporate events in another State
  • Food and beverage stalls travelling across State borders for limited-day operations
  • SaaS and IT firms demonstrating at India Mobile Congress, Convergence India, NASSCOM events
  • Pop-up retail and brand activations in another State for a specified campaign window
  • Consultants delivering on-site project work outside their home State

Section 24(ii) Compulsory Registration

Section 24(ii) mandates registration as a Casual Taxable Person regardless of the threshold limits in Section 22 (Rs 20 lakh for services in normal States; Rs 40 lakh for goods; Rs 10 lakh and Rs 20 lakh in special category States). Even a one day exhibition stall generating Rs 5,000 of taxable supply requires a CTP GSTIN if it is in a State where the supplier has no fixed place of business.

Key Pre-Conditions

  • Apply at least 5 days before commencement of business under the first proviso to Section 25(1)
  • Estimate tax liability for the period of registration and arrange the advance tax under Section 27(2)
  • Make taxable supplies only after receiving the registration certificate (Section 27(1))
  • Issue a tax invoice for each supply where the value exceeds Rs 200
  • Cannot opt for the composition scheme under Section 10 - CTPs are excluded by design

Special Exemption - Handicraft Suppliers

Notification 32/2017-Central Tax dated 15 September 2017 (read with subsequent notifications) exempts casual taxable persons making inter-State taxable supplies of specified handicraft goods from compulsory registration up to an aggregate turnover of Rs 20 lakh (Rs 10 lakh in special category States), provided they have a PAN and generate the e-way bill. This narrow exemption is regularly invoked by craft cluster artisans.

Patron Accounting CTP Services

ServiceWhat We Do
Advance Tax EstimationWe compute the estimated taxable outward supply for the registration period, apply the correct GST rate per HSN or SAC, factor in available Input Tax Credit, and arrive at the net advance tax under Section 27(2). Conservative estimation prevents shortfall; tight estimation conserves cash.
Form GST REG-01 Filing in Host StateEnd to end REG-01 filing on www.gst.gov.in in the State where the event or project is located, including Part A with PAN and OTP verification, Part B with business details and event proof, and DSC or EVC submission.
Advance Tax Challan and GSTIN ActivationGeneration of the GST challan for advance tax deposit, credit to the electronic cash ledger, and tracking of the provisional GSTIN until it activates on successful authentication.
GSTR-1 and GSTR-3B ComplianceMonthly or quarterly (QRMP) filing of GSTR-1 by the 11th and GSTR-3B by the 20th throughout the certificate validity. No GSTR-9 annual return is required for CTPs.
Extension Filing (Form GST REG-11)Where the event runs longer than 90 days - large infrastructure projects, multi-leg exhibitions, extended festivals - we file Form GST REG-11 before the original certificate expires, with additional advance tax for the extended period.
Refund of Excess Advance TaxAfter all GSTR-1 and GSTR-3B returns are filed, we lodge Form GST RFD-01 under "Refund of excess balance in electronic cash ledger" to recover unutilised advance tax. Typical refund cycle 60 days to bank account.
Surrender or Auto-ExpiryOn completion of business activity, the certificate either auto-expires after 180 days or is surrendered through Form GST REG-16. We coordinate the chosen exit to avoid orphan compliance obligations.
Our Process

Step by Step Procedure to Register as a Casual Taxable Person

The application uses Form GST REG-01, the same form used for regular registration; selecting Casual Taxable Person in Part A triggers the CTP workflow.

Step 1

Pre-Application Estimation (5 to 7 Days Before)

Estimate the taxable supply value for the proposed registration period in the host State, identify HSN or SAC codes, compute output GST at the applicable rate, factor in Input Tax Credit on local inputs, and arrive at the net advance tax payable under Section 27(2).

Estimate supply Net advance tax
Estimate 01
Step 2

File Part A of Form GST REG-01

On www.gst.gov.in, go to Services > Registration > New Registration and select Casual Taxable Person in the dropdown. Enter PAN, legal name, email and mobile, and complete OTP verification. The portal issues a TRN valid for 15 days and a provisional GSTIN for paying advance tax.

Select CTP TRN issued
TRN
Part A 02
Step 3

Pay Advance Tax Through GST Challan

Generate a GST PMT-06 challan for the estimated advance tax and pay through net banking, NEFT, RTGS, or over the counter. The amount credits to the electronic cash ledger under Section 27(3). Registration cannot proceed until this credit appears.

PMT-06 Cash ledger
PMT
Advance Tax 03
Step 4

Log In With TRN and Open Part B

Log back in using the TRN and open Form GST REG-01 Part B. Enter business details, constitution, the principal place of business in the host State (event venue, contractor site, stall reference), HSN or SAC codes, signatory details, and bank account details.

Host address HSN/SAC
Part B 04
Step 5

Upload Supporting Documents

Upload PAN, Aadhaar and photo of the signatory, proof of the event or project (organiser booking, work order, vendor allotment), proof of the temporary site address, bank account proof, and any letter of authorisation.

Event proof Site address
Upload Docs 05
Step 6

Verification and Submission

Complete the Verification tab and submit with DSC for companies and LLPs or EVC for proprietors and partnerships. The portal generates an Application Reference Number (ARN).

DSC / EVC ARN issued
Submit 06
Step 7

GSTIN and Certificate Issuance

The proper officer reviews the application and issues Form GST REG-06 electronically, stating the validity period. The provisional GSTIN status changes to Active. Taxable supplies can commence only after this point per Section 27(1).

REG-06 Active GSTIN
REG-06
Certificate 07
Step 8

File GSTR-1 and GSTR-3B During Validity

During the certificate validity, file Form GSTR-1 by the 11th (or quarterly under QRMP) and Form GSTR-3B by the 20th. Pay tax through the electronic cash ledger using the advance tax balance. No GSTR-9 annual return is required.

GSTR-1 11th GSTR-3B 20th
1/3B
Returns 08
Step 9

Extension Through Form GST REG-11 (If Required)

Before the existing certificate expires, file Form GST REG-11 citing sufficient cause and depositing additional advance tax for the extended period. The proper officer may extend by up to 90 more days - total validity capped at 180 days.

Before expiry Add advance tax
REG-11 09
Step 10

Refund of Excess Advance Tax

After all returns are filed, go to Services > Refunds > Refund of excess balance in electronic cash ledger and file Form GST RFD-01. The refund credits to the registered bank account, typically within 60 days. Surrender via REG-16 only after the refund hits the bank.

RFD-01 60 days
RFD
Refund 10

Document Checklist

Documents are uploaded on the GST common portal in PDF or JPEG, up to 1 MB each.

Identity and Constitution

  • PAN of the business (proprietor PAN for proprietorship; entity PAN for company, LLP, partnership)
  • Aadhaar of the authorised signatory (name must match PAN)
  • Photograph of the authorised signatory
  • Certificate of incorporation, partnership deed or LLP agreement (entity-based businesses)

Proof of Temporary Activity in Host State

  • Exhibition or trade fair booking confirmation, with stall number and date range
  • Work order or letter of intent from the project client for site-based projects
  • Vendor allotment letter from the festival or mela organiser
  • Lease or rent agreement for any temporary office or store in the host State

Bank and Authorisation

  • Cancelled cheque or bank statement first page of the business account
  • Letter of authorisation or board resolution appointing the authorised signatory
  • Address proof for the principal place of business in the host State (NOC plus electricity bill or allotment letter)

Advance Tax Working

  • Estimated taxable supply for the registration period (sales projection)
  • HSN or SAC mapping with GST rates
  • Expected Input Tax Credit on inputs and services to be procured locally
  • Net advance tax computation under Section 27(2) of the CGST Act, 2017

Common Challenges and Patron Solutions

ChallengeImpactHow Patron Accounting Solves It
Last Minute Application - 5 Day Rule MissedThe first proviso to Section 25(1) requires CTPs to apply at least 5 days before commencement, but exhibitors often realise this only on event day.Patron Accounting accepts urgent assignments and files REG-01 within 24 hours, lodging the advance tax challan the same day to compress the timeline.
Advance Tax Estimation ErrorsUnder-estimation creates a mid-event cash shortfall and Section 50 interest; over-estimation locks up working capital unlocked only via a 60 day RFD-01 cycle.We model both scenarios with a 10 percent buffer and recommend the optimal advance tax that protects compliance without choking cash.
Event Extension Beyond 90 DaysInfrastructure projects and large festivals frequently extend beyond the original 90 day certificate; after expiry, the GSTIN becomes inactive and a fresh REG-01 is needed.We track the 90 day clock from day one and file REG-11 with additional advance tax 7 days before expiry.
Refund Stuck in Electronic Cash LedgerRFD-01 refund of excess balance is often delayed because one of the GSTR-1 or GSTR-3B returns for the certificate period is missing or marked NIL incorrectly.We sequence all return filings first, reconcile the cash ledger, and then file RFD-01 with a clean trail.
Composition ConfusionSome clients ask for CTP plus composition scheme to reduce compliance, but Section 10 expressly excludes a CTP from composition.We clarify this at the engagement stage and structure the advance tax accordingly.
Multi-State Event TrailNational trade tours hit 4 to 6 States in a single quarter, and each State requires a separate CTP registration with its own advance tax.Our multi-State desk runs parallel REG-01 filings and consolidates compliance under a single engagement.

Patron Accounting Fees

Fee ComponentAmount
Patron Accounting Professional FeesStarting from INR 999 (Exl GST and Govt. Charges) - REG-01 end to end, single State
Advance Tax Estimation and ChallanIncluded in the standard package
Monthly GSTR-1 and GSTR-3B Filing During ValidityQuoted per month
Form GST REG-11 Extension FilingQuoted on assessment
Form GST RFD-01 Refund Application Post-CertificateQuoted on assessment
Multi-State CTP Package (4+ States)Bundled discount available
Government Fees on the GST PortalNIL on REG-01; the Section 27(2) advance tax is statutory and refundable to the extent unutilised

All fees and charges listed are indicative only and do not constitute a binding offer. Final amounts may vary depending on the volume of work and the complexity involved.

Professional service charges for drafting, filing, and representation are separate from the statutory fees. The exact fee depends on the complexity of the case, disputed amount, and number of hearings required. Contact us for a detailed quote.

Get a free Casual Taxable Person Registration consultation - Call +91 945 945 6700 or WhatsApp us. No-obligation assessment.

Time Taken

StageEstimated Timeline
Advance tax estimation and document collection1 to 2 working days
Form GST REG-01 Part A and TRNSame working day
Advance tax challan payment and cash ledger creditSame working day for NEFT or net banking; T+1 over the counter
Form GST REG-01 Part B filingSame working day after advance tax credit
Certificate of Registration in Form GST REG-063 to 7 working days from REG-01 submission
Apply before event (statutory)At least 5 days prior to commencement (first proviso to Section 25(1))
Validity of CTP registration90 days or period in application, whichever earlier
Extension under Form GST REG-11Filed before original expiry; up to 90 days more
Refund through Form GST RFD-01Approximately 60 days to bank credit after all returns are filed

Statutory deadlines: the 5 day prior application rule (Section 25(1) proviso); the 180 day maximum total validity (Section 27(1) plus proviso); and GSTR-1 by the 11th and GSTR-3B by the 20th of each month during validity.

Key Benefits

Benefits of Filing Through Patron Accounting

CA-Estimated Advance Tax

Balances compliance buffer with working capital protection.

5 Day Prior Rule Respected

Applications filed even when events are urgent.

Multi-State Coordination

National event tours handled under a single engagement.

Returns Filed On Time

GSTR-1 and GSTR-3B filed during validity to keep the refund pathway open.

REG-11 Extension Tracked

Tracked from day one to avoid a certificate lapse.

RFD-01 Refund Pursued

Refund of excess advance tax pursued to bank credit.

Documented Surrender

Surrender via Form GST REG-16 only after the refund credits.

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In FY 2025-26, Patron Accounting filed 78 Casual Taxable Person registrations across IITF Pragati Maidan, Aero India Bengaluru, India Mobile Congress, Surajkund Mela Haryana and multi-State festival circuits. 100 percent received the Form GST REG-06 certificate within 7 working days of REG-01 submission, with an average advance tax refund cycle of 54 days against the 60 day portal benchmark.

With offices in Pune, Mumbai, Delhi and Gurugram, Patron Accounting serves businesses across India both in-person and remotely. See our GST registration support in Delhi for local assistance.

Casual Taxable Person vs Regular GST Registration

ParameterCasual Taxable Person (Section 27)Regular Registration (Section 22 or 25)
TriggerOccasional supplies in a State or UT without a fixed place of businessAggregate turnover above threshold under Section 22, or compulsory under Section 24
Threshold ExemptionNone - compulsory under Section 24(ii) regardless of turnoverRs 20 lakh services or Rs 40 lakh goods (Rs 10 lakh / Rs 20 lakh special States)
Application FormForm GST REG-01 (same form; CTP selected in Part A)Form GST REG-01
Advance TaxMandatory under Section 27(2) before certificate issuanceNot applicable
ValidityPeriod in application or 90 days, whichever earlier; extendable by 90 moreIndefinite until cancelled or surrendered
Apply Before5 days before commencement under Section 25(1) provisoWithin 30 days of becoming liable to register
Composition SchemeCannot opt under Section 10Eligible if turnover below Rs 1.5 crore (Rs 75 lakh special States)
Annual Return GSTR-9Not requiredRequired if turnover above Rs 2 crore
RefundExcess advance tax via Form GST RFD-01Refund of inverted duty, exports etc per Section 54
Best ForExhibitions, trade fairs, festivals, project sites in another StateContinuous business with a fixed place of business

Partner Services

CTP registration often comes alongside other GST and registration work. Patron also handles:

  • GST Services - the complete GST services hub covering registration, returns, ITC, refunds, notices and audits.
  • GST Registration - the standard route for continuous business.
  • GST Returns - including GSTR-1, GSTR-3B and GSTR-9.
  • GST Refund - applications under Section 54 and Section 27(3).

We also handle GST Registration under Rule 14A for small B2B taxpayers, GST Registration Amendment via Form REG-14, and GST Registration Cancellation via Form REG-16 plus GSTR-10, as part of the same registration lifecycle.

Legal and Compliance Framework

Governing Act and Rules: Central Goods and Services Tax Act, 2017 read with the Central Goods and Services Tax Rules, 2017 and the corresponding State or Union Territory GST Acts and Rules.

ProvisionSubject
Section 2(20), CGST Act, 2017Definition of Casual Taxable Person
Section 24(ii), CGST Act, 2017Compulsory registration as a CTP regardless of threshold
Section 25(1) proviso, CGST Act, 2017Application at least 5 days before commencement of business
Section 27(1), CGST Act, 2017Certificate valid for period in application or 90 days, whichever earlier; supplies only after certificate
Section 27(1) proviso, CGST Act, 2017Officer may extend validity by a further 90 days on sufficient cause
Section 27(2), CGST Act, 2017Advance deposit of tax equal to estimated tax liability
Section 27(2) proviso, CGST Act, 2017Additional advance tax for any extended period
Section 27(3), CGST Act, 2017Advance tax credited to the electronic cash ledger; used per Section 49
Section 10, CGST Act, 2017Composition scheme - CTP expressly excluded
Section 49, CGST Act, 2017Payment of tax, interest, penalty and other amounts via electronic ledgers
Section 54, CGST Act, 2017Refund procedure including excess balance in the electronic cash ledger
Notification 32/2017-Central TaxExemption for inter-State suppliers of specified handicraft goods up to threshold

Penalty exposure: making taxable supplies as a Casual Taxable Person without registration in the host State violates Section 25(1) and exposes the supplier to a general penalty under Section 122 of up to Rs 10,000 or an amount equal to the tax evaded, whichever is higher. The customer in the host State may also face Input Tax Credit denial under Section 16(2) where the invoice does not carry a valid CTP GSTIN. Late filing of GSTR-1 and GSTR-3B during the certificate period attracts late fee under Section 47 at Rs 100 per day under CGST plus Rs 100 per day under SGST or UTGST.

Authoritative references: the GST common portal, Section 27 of the CGST Act, 2017 (CBIC Tax Information), and India Code (CGST Act and Rules).

Who is a casual taxable person under GST?

A Casual Taxable Person under Section 2(20) of the CGST Act, 2017 is a person 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 he has no fixed place of business. The three elements are occasional supply, supply outside home State, and absence of a fixed place of business in the host State. Registration is compulsory under Section 24(ii) regardless of turnover threshold.

What is the validity period of CTP registration?

Under Section 27(1) of the CGST Act, 2017, the certificate of registration issued to a Casual Taxable Person is valid for the period specified in the application or 90 days from the effective date of registration, whichever is earlier. The proper officer may extend this by a further period not exceeding 90 days on sufficient cause being shown, taking the maximum total validity to 180 days.

How is advance tax calculated for a casual taxable person?

Under Section 27(2) of the CGST Act, 2017, the advance deposit equals the estimated tax liability for the registration period. The calculation is estimated taxable supply value multiplied by applicable GST rate (5 percent, 12 percent, 18 percent or 28 percent based on HSN or SAC) less eligible Input Tax Credit on inputs and inward supplies. The amount is paid via Form GST PMT-06 challan and credited to the electronic cash ledger under Section 27(3).

How to extend CTP GST registration?

File Form GST REG-11 with the proper officer before the existing certificate expires, citing sufficient cause for extension. Deposit additional advance tax equivalent to the estimated tax liability for the extended period as required by the proviso to Section 27(2). The proper officer may extend by up to 90 more days under the proviso to Section 27(1), capping total validity at 180 days.

exhibition ke liye GST kaise le?

Apne home State ke bahar exhibition lagana hai toh CTP registration leni hogi. Event start hone se kam se kam 5 din pehle GST portal par REG-01 file kariye, advance tax estimate kariye aur challan se pay kariye, principal place of business mein event venue ka address daaliye, supporting documents upload kariye aur DSC ya EVC se submit kariye. 7 working din ke andar REG-06 certificate mil jaayega.

Can a casual taxable person claim Input Tax Credit?

Yes. A Casual Taxable Person can claim ITC on all inputs, capital goods and input services received in the course or furtherance of business in the host State, subject to the standard ITC conditions in Section 16 and Section 17 of the CGST Act, 2017. The ITC is utilised through the regular GSTR-3B mechanism during the certificate period. This is a key distinction from Non-Resident Taxable Persons, who can only claim ITC on goods imported into India.

How to claim refund of advance tax after CTP registration ends?

After all GSTR-1 and GSTR-3B returns for the certificate period are filed, navigate to Services then Refunds then Refund of excess balance in electronic cash ledger on the GST portal. File Form GST RFD-01 under that category. The portal auto-populates the unutilised balance. The refund typically credits to the registered bank account within 60 days under Section 54 read with Section 27(3) of the CGST Act, 2017.

Is GSTR-9 annual return mandatory for casual taxable persons?

No. A Casual Taxable Person is expressly exempt from filing Form GSTR-9 annual return. Only Form GSTR-1, outward supplies by 11th of the following month, and Form GSTR-3B, summary return by 20th, are required during the certificate's validity period. QRMP scheme can be opted for if eligibility conditions are met.

Can a casual taxable person opt for composition scheme?

No. Section 10 of the CGST Act, 2017 expressly excludes Casual Taxable Persons from opting for the composition scheme. A CTP must register and pay tax as a regular taxable person, with advance tax deposit under Section 27(2). The exclusion exists because composition is designed for steady small businesses, while CTP registration is a temporary mechanism for occasional supplies.

Quick Answers

  • Definition? Section 2(20) CGST Act - occasional supplies in a State without a fixed place of business.
  • Compulsory? Yes - Section 24(ii) - regardless of turnover.
  • Apply when? At least 5 days before commencement (Section 25(1) proviso).
  • Form? Form GST REG-01 with CTP selected in Part A.
  • Validity? 90 days or period in application, whichever earlier.
  • Extension? Form GST REG-11; up to 90 more days; 180 days maximum.
  • Advance tax? Section 27(2) - equal to estimated tax liability.
  • Composition? Not available - excluded by Section 10.
  • Annual return? GSTR-9 not required.
  • Refund? Excess balance through Form GST RFD-01 after all returns filed.

Why You Must Apply 5 Days Before

The first proviso to Section 25(1) of the CGST Act, 2017 mandates application at least 5 days before commencement of business. Making any taxable supply without the certificate exposes the supplier to a Section 122 penalty of up to Rs 10,000 or tax evaded, whichever is higher, and to ITC denial for the customer.

The 90 day clock starts from the effective date of registration; the Form GST REG-11 extension must be filed BEFORE the original expiry. Plan filing at least 7 working days before the event start date.

The Prescribed Route for Out-of-State Supplies

Casual Taxable Person Registration under Section 27 of the CGST Act, 2017 is the prescribed route for any business making occasional supplies in a State or Union Territory where it has no fixed place of business. The registration is compulsory under Section 24(ii) regardless of turnover, requires an advance tax deposit under Section 27(2), runs for a maximum of 180 days, and entitles the holder to a refund of unutilised advance tax through Form GST RFD-01 once compliance is closed.

Patron Accounting LLP, a CA and CS led firm with 15+ years of experience across Pune, Mumbai, Delhi and Gurugram, handles end to end CTP filings - advance tax estimation, REG-01 in the host State, monthly GSTR-1 and GSTR-3B, REG-11 extensions, RFD-01 refunds and surrender.

For continuous operations, move to standard GST Registration, keep your filings clean with our GST Returns service, and recover excess deposits through our GST Refund support.

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CTP Registration Support Across India

With offices in Pune, Mumbai, Delhi, and Gurugram, Patron Accounting serves exhibitors, contractors, and event firms across India - both in-person and remotely.

CTP Registration Support by City
Casual Taxable Person filing for events and projects, on-the-ground and remote
Partner Services
End-to-end support across the GST registration lifecycle

Content Created: 26 May 2026  |  Last Updated:  |  Next Review: 1 December 2026  |  Reviewed By: CA & CS Team, Patron Accounting LLP

This page is reviewed every six months (Tier 2 cadence) and on any CBIC notification touching Section 27, the advance tax mechanism, the handicraft exemption, or CTP-specific forms.