What is GSTIN? How to Get One and Why Every Business Needs It

If you have ever received a GST invoice, you must have noticed a long 15-digit number on it. That number is called a GSTIN. And if you run a business in India, there is a good chance you need one too.

But what exactly is a GSTIN? How do you get it? And what happens if you don't have one?

This guide answers all of that in plain, simple language. No complicated tax terms, no confusing government jargon — just everything you need to know about GSTIN as a small business owner or freelancer.

What is GSTIN?

GSTIN stands for Goods and Services Tax Identification Number. It is a unique 15-digit number that the government assigns to every business that registers under GST.

Think of it like a PAN card, but specifically for GST purposes. Just like your PAN identifies you for income tax, your GSTIN identifies your business for GST.

Every registered business in India has one. When you sell something and charge GST, your GSTIN goes on the invoice. When your customer files their returns, they use your GSTIN to claim their input tax credit. It is the number that connects everything in the GST system.

What Does a GSTIN Look Like?

A GSTIN is always 15 characters long. Here is what each part means:

• First 2 digits — Your state code. For example, Delhi is 07, Maharashtra is 27, Karnataka is 29.
• Next 10 digits — Your PAN number.
• 13th digit — The number of registrations you have in that state (usually 1 for most businesses).
• 14th digit — Always the letter Z by default.
• 15th digit — A checksum digit used for verification.

So if you see a GSTIN like 07ABCDE1234F1Z5, you can tell that this business is registered in Delhi (07) and their PAN is ABCDE1234F.

This structure also makes it easy to verify if a GSTIN is genuine. You can check any GSTIN on the official GST portal at gst.gov.in.

Who Needs a GSTIN?

Not everyone needs to register for GST. Here is a quick breakdown:

You must register if: - Your annual turnover from selling goods crosses ₹40 lakhs (₹20 lakhs in some special category states) - Your annual turnover from providing services crosses ₹20 lakhs (₹10 lakhs in special category states) - You sell products on e-commerce platforms like Amazon, Flipkart, or Meesho — regardless of turnover - You supply goods or services across state borders (inter-state supply) - You are an agent or aggregator

You may want to register voluntarily if: - Your clients are registered businesses and need your GSTIN to claim input tax credit - You want to appear more professional and credible - You plan to grow your business and expect to cross the threshold soon

Voluntary registration is allowed even if you are below the turnover limit. Many freelancers and small business owners do this specifically because their B2B clients prefer working with GST-registered vendors.

How to Get a GSTIN — Step by Step

Getting a GSTIN is done entirely online through the GST portal. Here is how the process works.

Step 1: Go to the GST Portal

Visit gst.gov.in and click on "New Registration" under the Services menu.

Step 2: Fill in Part A of the Application

Enter your PAN, mobile number, and email address. You will receive OTPs on both your mobile and email to verify them. Once verified, you get a Temporary Reference Number (TRN) for your application.

Step 3: Fill in Part B Using Your TRN

Log in again using your TRN and complete the full application. This includes: - Your business name and type (proprietorship, partnership, company, etc.) - Your principal place of business — address, state, PIN code - Details of the business owner or partners (Aadhaar, PAN, photo) - Bank account details - Nature of your business — what goods or services you deal in - HSN or SAC codes for your main products or services

Step 4: Upload Documents

You will need to upload: - PAN card of the business or proprietor - Aadhaar card - Proof of business address (electricity bill, rent agreement, or property document) - Bank account proof (cancelled cheque or bank statement) - Photograph of the proprietor or authorized signatory

Step 5: Submit and Wait for Verification

Once you submit the application, a GST officer reviews it. If everything is in order, your GSTIN is issued within 3 to 7 working days. You will receive it by email and on the GST portal.

In some cases, you may be asked to visit the GST office for physical verification, especially if the address proof needs clarification.

What Can You Do With Your GSTIN?

Once you have your GSTIN, a few things become possible:

Create proper GST invoices — Your GSTIN goes on every invoice you raise. Without it, you cannot legally charge GST to your customers.

Collect GST from customers — You charge GST on your sales and deposit that amount with the government when you file your returns.

Claim Input Tax Credit (ITC) — Any GST you pay on your business purchases — like buying equipment, software subscriptions, office supplies — can be claimed back against the GST you owe. This reduces your overall tax burden significantly.

File GST returns — With a GSTIN, you file GSTR-1 (outward sales) and GSTR-3B (tax payment) every month or quarter, depending on your turnover.

How GST Maker Helps Once You Have a GSTIN

Getting your GSTIN is just the first step. After that, you need to use it correctly on every invoice, file returns on time, and keep your records clean.

This is where GST Maker makes your life easier. You enter your GSTIN once during setup, and it automatically appears on every invoice you generate from that point on. The system handles CGST, SGST, and IGST calculations based on your customer's location. And when it is time to file returns, your data is already organized and ready to export.

No manual calculations. No formatting invoices from scratch. Just clean, compliant billing every time.

One Last Thing — Keep Your GSTIN Active

Once registered, you need to keep filing your returns regularly — even in months when you have no sales. Failing to file returns can lead to your GSTIN getting suspended or cancelled. And reinstating a cancelled GSTIN is a long and painful process.

Set a reminder for your filing due dates. Stay consistent. And use a tool that makes the whole process as simple as possible.

If you are ready to start billing with your GSTIN, head over to gstmaker.com and set up your account for free. Your first invoice will be ready in minutes.