GST Registration 2026: Thresholds, Exemptions & Special Rules

GST registration triggers vary by state and business activity. ₹20 lakh threshold applies selectively, while 12 business categories face zero limits.

State-wise Threshold Matrix

Zero Threshold Categories (12 Types)

1. Interstate Traders

Even ₹5,000 supply to another state

Registration Day 1 mandatory

No advance threshold calculation

2. E-commerce Vendors

Flipkart/Amazon listing is compulsory

TCS deduction starts immediately

No minimum sales required

3. RCM Recipients

Businesses taking advocate services

GTA freight payments

Foreign cloud subscriptions

4. Non-Resident Suppliers

Foreign entities supplying services

No PAN requirement

Security deposit mandatory

5. Casual Taxable Persons

Temporary market participation

Trade fair exhibitors

Outstation catering contracts

Aggregate Turnover Calculation

What Counts:

Taxable supplies + Exempt supplies

Interstate + Intrastate

All GSTINs under the same PAN

Exports (zero-rated) excluded

What Doesn't Count:

RCM inward supplies

Pure labour contracts

Agricultural services

Special Business Rules

Works Contractors:

No threshold limit

Registration before contract award

Works contract composition available

Ice Cream Parlours:

Mandatory GSTIN irrespective of turnover

Separate HSN classification

18% GST applicable

Rent-a-Cab Operators:

Registration from Day 1

No threshold benefit

Forward charge only

Composition Scheme Eligibility

Who Can Opt:

Traders: Turnover <₹1.5 Cr → 1% rate

Restaurants: Turnover <₹1.5 Cr → 5% rate

Services: Turnover <₹50 lakh → 6% rate

Mandatory First: Regular registration before opting for composition.

Exempted Businesses (No Registration)

Pure labour contractors

Agriculturalists (own produce)

Artists (pure skill services)

Religious services

Educational institutions (non-commercial)

Multi-state Operations

PAN-level Calculation:

Delhi turnover: ₹12 lakh

Mumbai turnover: ₹10 lakh

Total: ₹22 lakh → Register both locations

Registration Timeline Compliance

Threshold crossed → 30 days to register

Interstate starts → Immediate registration

E-commerce listing → Before first sale

RCM liability → Register same month

Penalty Exposure Matrix

Quick Decision Framework

Ask 5 Questions:

1. Interstate supply? → REGISTER

2. E-commerce seller? → REGISTER  

3. RCM services received? → REGISTER

4. Casual taxable? → REGISTER

5. Turnover > threshold? → REGISTER

4+ Yes = Immediate Registration Required

Technology Integration Rules

GST software must calculate:

Real-time aggregate turnover

Interstate supply tracking

RCM liability monitoring

State-wise threshold compliance

2026 Special Updates

PAN 2.0 linkage mandatory

Biometric verification for new registrations

Aadhaar authentication compulsory

Real-time turnover monitoring via APIs

GST registration compliance prevents 95% of automated notices. Businesses monitor turnover monthly and register proactively when approaching thresholds.