GST registration becomes mandatory once your aggregate annual turnover exceeds ₹40 lakh for businesses supplying goods, or ₹20 lakh for services, in most Indian states. In special category states (northeastern and hill states), these limits drop to ₹20 lakh for goods and ₹10 lakh for services. Regardless of turnover, certain categories must register from day one — including e-commerce sellers, inter-state suppliers, and businesses liable under reverse charge. Below the threshold, registration remains optional and can be beneficial for claiming Input Tax Credit.
In This Guide:
- 1. The Threshold, by Category
- 2. Categories That Must Register Regardless of Turnover
- 3. How ‘Aggregate Turnover’ Is Actually Calculated
- 4. The Composition Scheme — A Lighter-Compliance Alternative
- 5. Two Worked Examples
- 6. Frequently Asked Questions
1. The Threshold, by Category
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| Category | Normal States | Special Category States |
|---|---|---|
| Supply of goods | ₹40 lakh | ₹20 lakh |
| Supply of services | ₹20 lakh | ₹10 lakh |
| Both goods and services combined | ₹20 lakh (if any service component exists) | ₹10 lakh |
2. Categories That Must Register Regardless of Turnover
This is the part that catches new business owners off guard — turnover isn’t the only trigger for mandatory registration. The following categories must register for GST from the moment they start operating, even with zero revenue:
- E-commerce sellers — anyone selling through platforms like Amazon, Flipkart, or a similar marketplace, regardless of turnover
- Inter-state suppliers of goods — if you’re shipping goods across state lines, registration is mandatory from day one
- Businesses liable under reverse charge mechanism — where the recipient, not the supplier, is liable to pay GST
- Casual taxable persons and non-resident taxable persons — those supplying goods/services occasionally in a state where they have no fixed place of business
- Input Service Distributors and agents making taxable supplies on behalf of other taxable persons
We see this most often with D2C brands starting to sell online — they assume ₹20 lakh gives them breathing room, without realizing that listing on an e-commerce marketplace triggers mandatory registration regardless of how much (or little) they’ve actually sold.
3. How ‘Aggregate Turnover’ Is Actually Calculated
Aggregate turnover isn’t just your taxable sales — it includes all supplies made by you under the same PAN across India: taxable supplies, exempt supplies, exports, and inter-state supplies, calculated on an all-India basis, not state by state. This trips up businesses with multiple branches who sometimes assume each branch’s turnover is assessed independently — it isn’t; GST registration is required once your combined turnover across all locations under the same PAN crosses the threshold.
4. The Composition Scheme — A Lighter-Compliance Alternative
If your turnover is above the registration threshold but still relatively modest, the Composition Scheme is worth knowing about — it’s available to businesses with turnover up to ₹1.5 crore (₹75 lakh in some special category states), and offers a flat, lower tax rate with significantly simpler quarterly filing, in exchange for giving up the ability to claim Input Tax Credit and charge GST separately on invoices.
This suits small retailers and restaurants more than service businesses or anyone selling to GST-registered clients who expect to claim ITC on their purchases — worth a conversation with your advisor before opting in, since switching back and forth has its own compliance steps.
5. Two Worked Examples
Example 1: A freelance graphic designer in Delhi billing ₹18 lakh a year, working only with domestic clients, no e-commerce sales. Registration is optional — below the ₹20 lakh services threshold, and no mandatory category applies. Voluntary registration would still be worth considering if most clients are GST-registered businesses wanting to claim ITC on the designer’s invoices.
Example 2: The same freelance designer, but now also selling design templates through an online marketplace. Even if marketplace sales are just ₹50,000 a year, GST registration becomes mandatory immediately — the e-commerce category rule overrides the turnover threshold entirely.
Not Sure If You Need to Register for GST?
DKP Global reviews your specific business model — turnover, sales channels, and client mix — to confirm whether registration is mandatory or worth doing voluntarily.
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6. Frequently Asked Questions
Q1: What is the GST registration threshold in India?
A: ₹40 lakh for goods and ₹20 lakh for services in most states, dropping to ₹20 lakh and ₹10 lakh respectively in special category states. Certain categories, like e-commerce sellers, must register regardless of turnover.
Q2: Do I need GST registration if my turnover is below the threshold?
A: Not mandatorily, unless you fall into a category required to register regardless of turnover (e-commerce sellers, inter-state suppliers, reverse-charge-liable businesses). Voluntary registration is still an option and can be worthwhile for claiming Input Tax Credit.
Q3: Is GST mandatory for online sellers regardless of turnover?
A: Yes. Anyone selling through an e-commerce marketplace must register for GST from the start, regardless of how small their turnover is.
Q4: What is the composition scheme threshold?
A: Businesses with turnover up to ₹1.5 crore (₹75 lakh in some special category states) can opt for the Composition Scheme, trading Input Tax Credit eligibility for a flat, lower tax rate and simpler filing.
Q5: How is aggregate turnover calculated for GST threshold purposes?
A: It’s calculated on an all-India basis under a single PAN, including taxable, exempt, and export supplies across all branches or locations — not assessed separately per state or branch.
Q6: What happens if I cross the threshold but don’t register?
A: You become liable for a penalty of 10% of the tax due (minimum ₹10,000), or 100% in cases of deliberate evasion, along with interest on the unpaid tax from the date the threshold was crossed.
Ready to Confirm Your GST Registration Requirement?
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