Casual Taxable Person (CTP) vs Non-Resident Taxable Person (NRTP) under GST

The standard GST framework assumes a business operates from a fixed, permanent location within a specific Indian state. But what if your business model involves traveling across the country for seasonal events? Or what if a foreign consultant briefly arrives in India to deliver a specialized workshop?

To accommodate temporary and cross-border businesses, the GST law created two unique categories: the Casual Taxable Person (CTP) and the Non-Resident Taxable Person (NRTP).

If you fall into either category, the standard GST registration threshold limits do not apply to you. Registration is mandatory from day one. This guide explores the differences between these two categories, their compliance requirements, and common pitfalls for the 2026 Assessment Year.

What is a Casual Taxable Person (CTP)?

A Casual Taxable Person is an individual or business that occasionally undertakes transactions involving the supply of goods or services in a State or Union Territory where they have no fixed place of business.

Example: A famous handicraft seller based permanently in Jaipur (Rajasthan) decides to set up a temporary booth at a two-week trade fair at the Pragati Maidan in Delhi.

Because the seller has no fixed shop or office in Delhi, they cannot apply for a standard GST registration there. Instead, they must apply as a CTP in Delhi specifically for the duration of the trade fair.

Legal Reference

Relevant Law: Section 2(20) of the CGST Act defines Casual Taxable Person. Section 2(77) defines Non-Resident Taxable Person. Special registration provisions are governed by Section 27.

What is a Non-Resident Taxable Person (NRTP)?

A Non-Resident Taxable Person is any person (or entity) who resides outside India and occasionally supplies goods or services within India, but has no fixed place of business or residence in India.

Example: A specialized software engineer based in London travels to Bengaluru for three weeks to custom-configure an IT system for an Indian client and then returns.

The engineer operates within Indian territory but has no PAN, no local address, and no permanent Indian entity. They must register as an NRTP.

Key Differences: CTP vs NRTP

While both categories deal with temporary operations and face mandatory registration, their compliance rules differ significantly:

Similarities: The Advance Tax Burden

The most striking feature of both the CTP and NRTP categories is the requirement to pay tax in advance. Because the business has no permanent roots in the state, the government demands financial security before allowing operations to commence.

Registration and Advance Tax Rules

1. Apply Before You Start: You must apply for registration at least 5 days before commencing your business in the temporary state.
2. Estimate and Pay: When applying, you must estimate the total tax liability you expect to incur during your temporary stint.
3. Cash Deposit: You must deposit this entire estimated tax amount directly into the Electronic Cash Ledger before the registration certificate is granted.
4. Validity: The registration is usually valid for a maximum of 90 days. It can be extended by another 90 days, provided you deposit additional estimated tax for the extended period.

When the temporary operation concludes, you file your final returns. If your actual tax liability was lower than your estimated advance deposit, you claim a refund of the excess balance.

Return Filing Compliance

Temporary registration does not absolve you from regular return filing.

• CTP Returns: A Casual Taxable Person must file the standard GSTR-1 and GSTR-3B using their temporary GSTIN, exactly like a normal taxpayer.
• NRTP Returns: A Non-Resident Taxable Person files a specialized return called Form GSTR-5. This must be filed monthly within 13 days after the end of the month, or within 7 days after the last day of the registration validity period (whichever is earlier).

Neither a CTP nor an NRTP is required to file the GSTR-9 annual return.

Common Mistakes Beginners Make

1. Forgetting ITC Reversal on Closing: When a CTP wraps up an exhibition and unregisters the temporary GSTIN, they often forget to reverse the ITC on unsold stock they carry back to their home state. They must issue an inter-state invoice (via IGST) from their temporary Delhi GSTIN to their permanent Rajasthan GSTIN.
2. NRTPs Claiming Hotel ITC: It is a common misstep for foreign entities (NRTPs) to try and claim Input Tax Credit on the expensive hotel stays and local transport they consume while executing their Indian contract. The law specifically denies this; NRTPs can only claim ITC on imported goods.
3. Missing the 5-Day Window: Deciding to attend a trade fair at the last minute and applying for CTP registration on the opening day. The portal requires a 5-day advance application, and without the generated TRN and advance tax payment, stall organizers often deny entry.

Conclusion

The Casual Taxable Person and Non-Resident Taxable Person designations ensure that temporary business operations do not create compliance black holes within the GST network. While the requirement to deposit estimated taxes in advance poses a cash-flow working capital challenge, understanding the precise differences—especially regarding Input Tax Credit eligibility—allows traveling businesses to accurately quote prices and wrap up short-term contracts without leaving messy tax liabilities behind.