Karnataka GST Number Guide: Everything You Need to Know

Introduction

Picture this: You’re a Bengaluru-based chai stall owner who just landed a ₹50 lakh contract with a tech park. But wait—can you issue a GST invoice? Without a Karnataka GST number, you’re stuck brewing chai and tax troubles.

Welcome to your ultimate guide to the Karnataka GST number—a 15-digit code that unlocks legal credibility, Input Tax Credit (ITC), and seamless pan-India operations. Whether you’re a Mysuru silk trader or a Mangaluru IT freelancer, this guide brews clarity into Karnataka’s GST rules, compliance, and 2025 updates.

In this guide, we break down everything from GST registration to tax slabs, compliance rules gst state codes, and even how to verify your GST number online. Let’s simplify the tax jargon and make GST easy for you!

What Is a Karnataka GST Number?

A Karnataka GST Number is a 15-digit unique identification number assigned to businesses registered under the Goods and Services Tax (GST) Act in Karnataka. It follows the GST state code system, where Karnataka’s GST state code is 29.

Breaking Down a Karnataka GST Number:

• First Two Digits (29) – Karnataka’s GST state code.
• Next Ten Digits – The PAN number of the business.
• Thirteenth Digit – Unique registration number within a PAN.
• Fourteenth Digit – Usually ‘Z’ (default for all GSTINs).
• Fifteenth Digit – A checksum digit for validation.

Example:

• GSTIN: 29ABCDE1234F1Z5
  • 29: Karnataka state code
  • ABCDE1234F: PAN of business
  • 1: Entity number
  • Z: Default character
  • 5: Checksum digit

Every business registered in Karnataka needs a GST number to legally collect tax, issue tax invoices, and claim input tax credits.

Who Needs a GST Number in Karnataka?

You must register for a Karnataka GST Number if: 

1. Your annual turnover exceeds ₹40 lakh (₹20 lakh for service providers).
2. You sell goods or services interstate (outside Karnataka).
3. You are an e-commerce seller (Amazon, Flipkart, etc.). Even ₹1 sales on Amazon/Flipkart require GSTIN.
4. You are a casual taxable person (temporary business setup).
5. You are a freelancer earning above ₹20 lakh annually.
6. You supply goods on which a reverse charge applies.

Even if your turnover is below the threshold, voluntary GST registration allows you to claim input tax credits and build credibility with buyers.

Did you know? 

Karnataka’s GST registrations surged by 18% YoY (CBIC, 2023), driven by MSMEs and startups.

How to Register for GST in Karnataka?

Step-by-Step GST Registration Process:

Step 1: Gather Documents

• PAN card
• Proof of business address (rent agreement/electricity bill)
• Bank account details
• Digital Signature (DSC) for companies/LLPs

Step 2: Visit the GST Portal
Go to www.gst.gov.in → Click ‘Register Now’ under ‘Taxpayers’.

Step 3: Fill Part-A (Temporary Reference Number)

• Select ‘New Registration’ → Choose ‘Taxpayer’ → State (Karnataka).
• Enter PAN, email, and mobile number → Verify via OTP.

Step 4: Submit Part-B Application

• Business details (trade name, HSN codes).
• Promoter/partner information.
• Submit via DSC (companies) or EVC (others).

Step 5: Receive GSTIN
Track Application Reference Number (ARN) status. Approval takes 3–7 days.

Pro Tip: Use RegisterKaro’s GST registration service to avoid errors.

Once registered, you can start filing GST returns and comply with Karnataka GST compliance requirements.

Compliance and Tax Filing Requirements in Karnataka

After obtaining a Karnataka GST Number, you must adhere to compliance rules: 

• Monthly/Quarterly Returns – File GSTR-1 (sales), GSTR-3B (summary returns).

GSTR-1: Sales details (due by the 11th of the next month).

GSTR-3B: Summary return (due by the 20th/22nd/24th based on turnover).

• Annual Return (GSTR-9) – Mandatory for businesses with over ₹2 crore turnover. Due December 31.
• E-Way Bill Compliance – Required for transporting goods worth ₹50,000+.
• GST Audit – Required if turnover exceeds ₹5 crore annually.

Penalties for non-compliance:

• Late fee: ₹50/day (₹20 for nil returns).
• Non-filing penalty: 10% of unpaid tax (min. ₹10,000).

GST Rates Applicable in Karnataka

The GST tax slabs applicable in Karnataka are:

• 0% GST: Essential items such as fresh milk, fruits, vegetables, and unprocessed grains.
• 5% GST: Items like edible oils, natural graphite, and certain food items.
• 12% GST: Products including condensed milk, dried nuts, and bicycles.
• 18% GST: Goods such as mobile phones, washing machines, and non-alcoholic beverages.
• 28% GST: Luxury items and services like online gaming, carbonated beverages, and air-conditioning machines.

Make sure to check the correct GST tax slab for your business!

How to Verify a Karnataka GST Number Online?

To verify any GST number in Karnataka:

1. Go to the GST Portal India
2. Click on ‘Search Taxpayer’.
3. Enter the GSTIN (Karnataka GST Number).
4. Click ‘Search’ to view the business details and compliance status.

Always verify the GST number before making high-value transactions to prevent fraud.

Red Flags:

• Mismatched business name/address.
• Status marked as ‘Inactive’ or ‘Cancelled’.

Why Choose RegisterKaro for Karnataka GST Registration?

Registering for GST doesn’t have to be complicated. RegisterKaro simplifies the process by:

• Filing your application within 24 hours.
• Providing expert tax consultation.
• Ensuring 100% compliance with Karnataka GST laws.
• Helping you claim maximum tax benefits.

Get your Karnataka GST Number hassle-free with RegisterKaro today!

Conclusion

Navigating Karnataka’s GST rules doesn’t have to feel like decoding the Konkan Railway timetable. From Bengaluru’s tech parks to Coorg’s coffee estates, a GST number is your ticket to compliance, credibility, and growth.

Whether you’re a first-time business owner or an established enterprise, understanding and complying with Karnataka GST compliance rules is essential. From registration to tax filing and compliance, this guide has covered it all.

Need expert assistance? RegisterKaro is here to make your GST registration seamless. Contact us today and get your Karnataka GST Number effortlessly!

Frequently Asked Questions (FAQs)

1. What is Karnataka’s GST state code?
A: The GST state code for Karnataka is 29. It appears as the first two digits in every Karnataka GST number.

2. How long does it take to get a Karnataka GST Number?
A: It usually takes 7 working days after applying. If additional verification is needed, it may take up to 14 days.

3. Can I apply for a Karnataka GST Number without a business?
A: No, a GST number is issued only to businesses or individuals involved in taxable supplies.

4. What if I don’t register for GST in Karnataka?
A: Failing to register when required can lead to a penalty of 10% of the tax due or ₹10,000, whichever is higher.

5. How do I cancel my Karnataka GST Number?
A: Log in to the GST portal India, go to ‘Services’ → ‘Registration’ → ‘Application for Cancellation,’ and follow the instructions.