What is UIN Under GST and Who Needs it? Complete Explanation

Have you ever wondered why certain foreign embassies or international organisations in India do not pay GST on their purchases, while every regular business does? The answer lies in something called the UIN number.

In this post we will discuss what UIN is, its full form, format, difference between UIN & GSTIN and how to get UIN. 

UIN Full Form in GST Explained 

The UIN full form in GST stands for Unique Identification Number. This is defined under Section 25(9) of the CGST Act, 2017. The GSTIN UIN full form, when expanded fully, would be Goods and Services Tax Identification Number for Unique Identification Number holders. But most people simply refer to it as the UIN number or just UIN.

Now here is where it gets a little technical. Under the GST law, most registered businesses get a GSTIN (Goods and Services Tax Identification Number). The GSTIN is a 15-digit number used for all filing, invoicing, and compliance purposes.

The UIN is different. It is also a 15-digit code, but it is issued only to a restricted group of entities. Regular businesses cannot apply for a UIN. They get a GSTIN. The UIN is exclusively for certain exempt or diplomatic bodies.

What Does a UIN Number Mean for India? 

The concept of a unique identity number for non-taxable bodies in India is actually quite thoughtful. India is home to a large number of foreign missions, multilateral organisations, and consular offices. Cities like New Delhi, Mumbai, Chennai, and Kolkata host hundreds of such establishments.

Without a system like the UIN, there would be no organised way to process their GST refund claims. And that would create diplomatic and legal complications.

UIN meaning in practical terms translates to three things:

1. Identity — It gives these special organisations an official identity within the GST system.
2. Tracking — Every purchase made using the UIN gets tagged. The government knows exactly what was bought, when, and for how much.
3. Refund eligibility — The UIN is the basis on which refund claims are processed. No UIN means no refund.

Who Are UIN Holders in GST? 

This is one of the most commonly asked questions. Who exactly qualifies to be a UIN holder in GST?

The government has defined this clearly. According to the CGST Act and related notifications, the following entities are eligible to apply for a UIN:

• Specialised agencies of the United Nations Organisation (UNO)
• Multilateral financial institutions and organisations notified under the United Nations (Privileges and Immunities) Act, 1947
• Consulate or Embassy of foreign countries
• Any other person or class of persons notified by the Commissioner

So a UIN holder is not a business. It is an entity with a special diplomatic or international status in India. These UIN holders are entitled to claim a refund of the taxes they pay on inward supplies (goods or services purchased in India).

UIN vs GSTIN: What Is the Difference? 

Many people confuse the two. Let us put them side by side.

How to Get UIN Number: Step by Step Process

Now to the most practical question. How to get a UIN number under GST?

The process is entirely online through the GST portal. Here is a step-by-step walkthrough.

Step 1: Visit the UIN Number Portal

Go to the official GST portal at www.gst.gov.in. This is the central UIN number portal for all GST-related registrations, filings, and applications in India.

Step 2: Navigate to GST New Registration Login

On the homepage, click on "Services" and then select "Registration." From the dropdown, click on "New Registration." This is the GST new registration login pathway that applies both for regular taxpayers and UIN applicants.

Step 3: Select the Correct Taxpayer Type

In the registration form, there is a field called "I am a." From the dropdown menu, select "Tax Deductor" or the specific category applicable to your organisation. For UIN registration, the relevant option is typically "UN Body / Embassies / Others" depending on which category the applying organisation falls under.

Step 4: Fill in the Application

The application form will ask for:

• Legal name of the organisation
• PAN (if applicable)
• Address in India
• Contact details
• Authorised signatory details

Step 5: Upload Documents

Upload the necessary documents (covered in the next section). Make sure all scanned copies are clear and within the file size limits specified on the portal.

Step 6: Submit with DSC or EVC

Submit the form using a Digital Signature Certificate (DSC) or Electronic Verification Code (EVC). For embassies and UN bodies, DSC is typically the preferred method.

Step 7: Track Application Status

After submission, an Application Reference Number (ARN) is generated. The application is reviewed by the jurisdictional GST officer. Once approved, the UIN registration is complete and the number is issued.

The entire process, if documents are in order, can be completed within 3 to 5 working days.

Documents Required For UIN Registration 

UIN registration requires a specific set of documents. The exact list can vary depending on the type of organisation applying. Here is a general list:

For Embassies and Consulates:

• Proof of diplomatic status (issued by Ministry of External Affairs, Government of India)
• Address proof of the office in India
• Copy of the authorisation letter from the Head of Mission
• Passport copy of the authorised signatory
• Photograph of the authorised signatory

For UN Bodies and Multilateral Organisations:

• Copy of the notification/recognition under the UN (Privileges and Immunities) Act, 1947
• Address proof of the registered office in India
• Details of the authorised signatory
• Relevant Ministry of Finance or Ministry of External Affairs certificate

General Documents (Applicable to All):

• Proof of constitution of the entity
• Bank account details (cancelled cheque or bank statement)

Make sure all documents are self-attested and translated into English if they are in a foreign language. The GST portal only accepts English documents for processing.

UIN Code Format Decoded 

The UIN code follows a standard 15-character format under the Indian GST system. Here is how to read it:

So for example:

• First 2 Digits: State Code (indicates the state where the entity is registered).
• Next 10 Digits: Permanent Account Number (PAN) or a unique code assigned to the entity.
• 13th Digit: Entity Number (represents the registration sequence for the same PAN in that state).
• 14th Digit: Default character, typically the alphabet "Z".
• 15th Digit: Checksum digit

This makes the UIN number structured and verifiable. Each digit or set of digits carries meaning, making it easy for the GST system to validate and process refund claims.

Closing Thoughts

The UIN number might seem like a niche topic at first glance. But for the organisations that need it, and for the suppliers who deal with those organisations, understanding it properly can save a lot of time, money, and confusion.

From knowing the UIN full form to understanding who qualifies as a UIN holder in GST, from learning how to get a UIN number to navigating the UIN number portal, this guide has tried to cover it all in plain, honest language.

If you are a business that regularly supplies goods or services to foreign embassies or UN bodies in India, make sure your invoicing system is set up to handle UIN-tagged transactions properly. Munim Accounting and Billing Software supports GST-compliant invoicing for all categories of buyers, including UIN holders, making it easier to stay accurate and audit-ready.

Frequently Asked Questions on UIN Number

1. What is UIN in GST?

UIN in GST stands for Unique Identification Number. It is a 15-digit identification number issued to foreign diplomatic missions, UN bodies, and other notified organisations in India that are not liable to pay GST but are entitled to a refund of the GST paid on their purchases.

2. What is the UIN full form in GST?

The UIN full form in GST is Unique Identification Number.

3. Who are UIN holders in GST?

UIN holders in GST include foreign embassies, consulates, UN bodies and specialised agencies, multilateral financial institutions notified under the UN (Privileges and Immunities) Act, 1947, and any other person or class of persons as notified by the GST Commissioner.

4. How to get a UIN number?

To get a UIN number, the organisation needs to apply through the GST portal at www.gst.gov.in using the New Registration option and selecting the appropriate category. Supporting documents need to be uploaded, and the application is processed by the jurisdictional GST officer.

5. Is UIN registration the same as GST registration?

No. UIN registration is a separate process meant specifically for non-taxable entities like embassies and UN bodies. Regular GST registration results in a GSTIN, while UIN registration results in a unique identification number.

6. What does a unique identification number mean in simple terms?

Unique identification number means a special code assigned to a specific organisation or entity so it can be identified uniquely within a system. In the GST context, it refers to the 15-digit code given to non-taxable bodies to help them claim refunds on GST paid.

About the author

Mehul Jagwani

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Mehul is a seasoned content writer with a passion for simplifying complex accounting and GST topics. With a keen interest in entrepreneurship and business management, he specializes in creating informative and engaging content for themunim.com. His goal is to help businesses understand and implement accounting and GST software solutions effectively. When he's not crafting content, Mehul enjoys exploring new places and spending time with his Golden Retriever.