You've Been Paying GST Wrong This Whole Time — Here's What CGST, SGST, IGST & UTGST Actually Mean

Every month, lakhs of Indian business owners file GST returns without fully understanding what they're actually paying — or why their tax gets split between two governments. If you've ever stared at a GST invoice wondering why there are two separate tax lines, this guide finally breaks it down in plain language.

“No jargon. No law-speak. Just clarity.”

The Big Picture: Why Does India Have 4 Types of GST?

Before GST arrived in July 2017, India had a tax nightmare — VAT, Central Excise, Service Tax, Entry Tax, and a dozen other levies, all stacked on top of each other. The Goods and Services Tax replaced all of them with one unified system.

But here's the catch: India is a federal country. Both the Central Government and State Governments have a constitutional right to collect tax. So instead of creating one single GST, the government designed a dual-structure model — where tax revenue is shared between the Centre and the State depending on where the transaction happens.

That's the core reason you see different GST types on your invoices.

The 4 Types of GST — At a Glance
 

 

CGST – Central Goods and Services Tax

CGST is levied by the Central Government on transactions that happen within a single state. It runs alongside SGST — you never pay one without the other on a local sale.

If you're a Delhi retailer selling to a Delhi customer at 18% GST, your invoice will show 9% CGST + 9% SGST. The central portion goes to New Delhi, the state portion stays with the Delhi government.

Key points about CGST:

1. Governed by the CGST Act, 2017
2. Rate is always equal to SGST on the same transaction
3. Input Tax Credit (ITC) of CGST can only be used to offset CGST or IGST — not SGST
4. Collected by Central Government but administered jointly with states through GST Council decisions

SGST – State Goods and Services Tax

SGST is the state government's share of tax on local transactions. Every state has its own SGST Act, but the rates are mirror-matched with CGST under GST Council guidelines.

The revenue from SGST goes entirely to the state where the sale happens — which is why states were initially resistant to GST and had to be convinced with revenue compensation guarantees.

Key points about SGST:

1. Each state (except UTs with legislature) has its own SGST Act
2. Rate always equals CGST for the same goods/services
3. ITC of SGST offsets only SGST or IGST — not CGST
4. States like Maharashtra, Karnataka, Tamil Nadu collect significant revenue through SGST

IGST – Integrated Goods and Services Tax

This is where it gets interesting — and where most GST confusion actually lives.

IGST applies when goods or services move across state borders. It's collected entirely by the Central Government, which then distributes the state's share to the destination state (where the buyer is located).

So if a Pune-based manufacturer sells to a Hyderabad buyer, IGST is charged. The Centre collects it, keeps its portion, and transfers the rest to Telangana's treasury.

When exactly does IGST apply?

Inter-state supply of goods or services

1. Imports into India (IGST replaces customs CVD + SAD in most cases)
2. Export-related transactions (technically zero-rated, but IGST framework applies)
3. E-commerce transactions where seller and buyer are in different states
4. Supply to/from Special Economic Zones (SEZs)

Key points about IGST:

1. Rate = CGST rate + SGST rate (e.g., 18% IGST = 9% CGST + 9% SGST)
2. ITC of IGST can be used to offset IGST, CGST, or SGST — making it the most flexible credit
3. Governed by the IGST Act, 2017
4. The destination-based nature ensures consuming states get their fair revenue share

UTGST – Union Territory GST

UTGST is the least talked-about but equally important type. It functions exactly like SGST — but applies in Union Territories that don't have their own legislature.

Delhi and Puducherry have elected assemblies, so they use SGST. Other UTs without legislatures use UTGST, collected by the UT administration itself.

How GST Type Is Determined — A Simple Decision Tree

Before raising any invoice, ask yourself one question: Are the supplier and recipient in the same state or different states?

Same state → CGST + SGST (split equally)

Different states → IGST (charged at combined rate)

Supplier in UT (no legislature) + buyer in same UT → CGST + UTGST

Supplier in UT + buyer in different state → IGST

This one rule covers 95% of real-world GST situations.

ITC Utilisation Order — Critical for Cash Flow

One of the most financially important aspects of the GST type system is how Input Tax Credit (ITC) can be used. The government updated the ITC offset rules to make them more business-friendly.

The critical restriction: CGST credit cannot directly offset SGST liability, and vice versa. This catches many small businesses off-guard during return filing — they end up paying cash despite having credit sitting in their ledger, simply because it's in the wrong head.

Common Mistakes Businesses Make With GST Types

Most penalty notices and ITC mismatches at gstfilling.co originate from a handful of recurring errors:

Treating intra-state transactions as inter-state (or vice versa) because the billing address and shipping address are in different states — the supply state and the place of supply determine the GST type, not just the address on the purchase order.

Using CGST credit to offset SGST liability — this is explicitly not allowed and causes cash outflow that shouldn't exist.

Not updating place of supply when supplying services remotely — for services, place of supply rules are different from goods, and getting this wrong means charging the wrong GST type entirely.

Conclusion

CGST, SGST, IGST, and UTGST aren't four different taxes — they're four different slices of the same GST pie, designed to fairly distribute revenue between Central and State governments in a federal democracy.

Once you understand that the type of GST is determined entirely by where the supply happens relative to state/UT boundaries, everything else follows logically. The rates, the ITC rules, the return filing — it all ties back to that one foundational principle.

If you're unsure about which GST type applies to your specific transactions, or need help with correct ITC utilisation and return filing, the team at gstfilling.co is here to make it seamless.

Frequently Asked Questions

Q.1: Can I charge IGST on an intra-state sale by mistake?

Yes — and it's a costly mistake. If you charge IGST on a local sale, the recipient can't claim it as CGST/SGST credit in their state. You'll need to issue a credit note, cancel the wrong invoice, and raise a fresh one with CGST + SGST. Prevention is far easier than correction here.

Q.2: What happens to IGST collected on imports?

IGST is levied at the port of entry on the assessable value of imported goods. The Centre collects it, retains its share equivalent to CGST, and transfers the rest to the destination state where the importer is registered.

Q.3: If I'm registered in multiple states, which GST type applies?

Your GSTIN state determines the "supplier state." Even if your head office is in Mumbai but you're supplying from your Chennai warehouse, and the buyer is in Hyderabad — it's an inter-state supply (Tamil Nadu → Telangana), so IGST applies.

Q.4: Is UTGST the same rate as SGST?

Yes. For any given goods or services category, CGST + UTGST = CGST + SGST = 50% of the total GST rate. The rates are identical; only the administering authority changes.

Q.5: Can exports attract GST?

Exports are zero-rated supplies under GST. You can either export under Bond/LUT without paying IGST, or pay IGST and claim a refund. Most exporters use the LUT route to preserve working capital.

Q.6: Which GST type applies on online sales through Amazon or Flipkart?

E-commerce operators deduct TCS (Tax Collected at Source) under GST. If seller and buyer are in different states, IGST applies. The e-commerce platform is required to collect and deposit TCS on your behalf.

Author Bio

Harshita Saini is an SEO Executive at LegalDev, where she manages SEO and content strategy for gstfilling.co. She specializes in creating search-focused content and closely tracking the latest GST updates, compliance changes, and tax developments across India.
Harshita focuses on simplifying complex GST regulations and transforming technical tax topics into clear, practical insights that help business owners and taxpayers make informed decisions.