GST Basics in India: Registration, Slabs & Input Tax Credit

When Priya started working as an independent UI/UX design consultant in Bengaluru, she billed her corporate clients a straightforward retainer of ₹1,20,000 per month. In her eleventh month of freelancing, her cumulative annual revenue crossed ₹20 lakh.

A week later, an enterprise client refused to clear her invoice, stating:

“Your annual turnover has exceeded the statutory threshold of ₹20 lakh. Under Section 22 of the CGST Act, you are legally mandated to register for Goods and Services Tax (GST) and issue a tax invoice with an 18% GST charge. We cannot process non-compliant invoices without exposing ourselves to tax penalties.”

Priya panicked. She had never dealt with indirect taxes. Did she need to pay 18% GST out of her own pocket? How would she claim credit for the laptop and software subscriptions she bought for work? What were CGST, SGST, and IGST?

Implemented in July 2017, the Goods and Services Tax (GST) replaced a fragmented maze of legacy indirect taxes (VAT, Service Tax, Excise Duty, Octroi) with a unified, destination-based tax system across India. For every freelancer, consultant, and business owner, understanding GST mechanics—especially Input Tax Credit (ITC)—is the difference between running a compliant, profitable venture and facing severe tax notices.

1. The 3 Types of GST: CGST, SGST, and IGST

GST is a destination-based consumption tax. Taxes are collected where goods or services are consumed, rather than where they are produced:

[ INTRA-STATE SUPPLY (Within Same State) ]
  Example: Graphic designer in Mumbai sells services to a client in Pune.
  Tax Split:
  ├── 50% CGST (Central Goods and Services Tax) -> Goes to Central Government
  └── 50% SGST (State Goods and Services Tax) -> Goes to Maharashtra Government
  Total Tax = 18% (9% CGST + 9% SGST)

[ INTER-STATE SUPPLY (Between Two Different States) ]
  Example: Graphic designer in Mumbai sells services to a client in Bengaluru.
  Tax Split:
  └── 100% IGST (Integrated Goods and Services Tax) -> Collected by Centre, apportioned to destination State
  Total Tax = 18% IGST

Whether you bill intra-state or inter-state, the total tax rate paid by the buyer remains identical. Only the routing of tax revenue between Central and State governments changes.

2. Mandatory Registration Thresholds in India

You are not required to obtain a GST number the moment you register a business or begin freelancing. Statutory registration is triggered by annual turnover:

3. Input Tax Credit (ITC): The Core Anti-Cascading Engine

The greatest innovation of GST is the elimination of the “tax-on-tax” cascading effect through Input Tax Credit (ITC).

ITC allows you to deduct the GST you paid on business purchases (Input GST) from the GST you collect from clients on sales (Output GST):

Formula: Net GST Payable to Government = Output GST (On Sales) - Input Tax Credit (On Business Purchases)

A Real Freelance Example of ITC in Action

Consider Rajesh, a freelance video editor in Delhi:

• Output GST (Sales): Rajesh bills an advertising agency ₹2,00,000 for editing services + 18% GST (₹36,000 Output GST collected). Total invoice = ₹2,36,000.
• Input GST (Purchases): In the same month, Rajesh purchases a professional editing computer for ₹1,00,000 + 18% GST (₹18,000 Input GST paid to the electronics dealer). He also pays ₹10,000 + 18% GST (₹1,800 Input GST) for cloud storage and software subscriptions. Total Input GST = ₹19,800.

Because Rajesh had a valid GSTIN and obtained GST invoices from his laptop vendor and software provider, he reduced his cash tax liability by ₹19,800!

4. Current GST Rate Slabs in India

The GST Council classifies goods and services into four primary rate tiers, alongside exempt categories:

5. Export of Services: Zero-Rated Tax via LUT

If you freelance for overseas clients (US, Europe, Singapore, etc.) and receive payment in convertible foreign exchange (USD, EUR, GBP):

• Your services are legally classified as an Export of Services.
• Under Section 16 of the IGST Act, export of services is Zero-Rated (0% GST)!
• The Letter of Undertaking (LUT): By filing a simple, free LUT (Form GST RFD-11) online at the start of each financial year, you can export your services without paying any upfront IGST, while retaining 100% eligibility to claim Input Tax Credit on domestic business purchases!

6. Monthly & Quarterly Compliance Checklist for Beginners

To avoid late fees (₹50 per day under Section 47) and interest penalties:

1. GSTR-1: Details of all outward supplies and sales invoices filed by the 11th of each month (or quarterly under QRMP scheme).
2. GSTR-2B: The auto-generated purchase statement showing eligible Input Tax Credit uploaded by your suppliers. Always verify your vendor uploaded your invoice before claiming ITC!
3. GSTR-3B: The monthly summary return where you offset ITC and pay net tax by the 20th of each month.