What is the difference between CGST, SGST, and IGST?

CGST (Central GST) and SGST (State GST) are levied together on intra-state transactions, with revenue shared equally between the Central and State governments. IGST (Integrated GST) applies to inter-state transactions and imports, collected by the Central government and later apportioned to the destination state.

When is IGST charged instead of CGST and SGST?

IGST is charged when the supplier and the recipient are in different states (inter-state supply), or when goods are imported into India or exported. For example, a seller in Tamil Nadu selling to a buyer in Maharashtra will charge IGST. If both parties are in the same state, CGST and SGST apply instead.

Can IGST input tax credit be used to offset CGST or SGST liability?

Yes, IGST credit can be used to offset IGST liability first, then any remaining credit can be applied against CGST and SGST liabilities in that order. However, CGST credit cannot be used against SGST liability and vice versa — they can only offset their own type or IGST.

How does GST work for ecommerce and online sales across states?

Ecommerce sales delivered to customers in other states attract IGST since they qualify as inter-state supplies. The ecommerce operator may also be required to collect TCS under Section 52 of the CGST Act. Sellers must ensure correct determination of place of supply to apply the right GST type on each transaction.

What happens if a business incorrectly charges CGST/SGST instead of IGST?

Charging the wrong type of GST is a compliance error that can lead to demand notices, interest charges, and penalties. The business would need to reverse the incorrectly charged tax, pay the correct IGST, and may face scrutiny from tax authorities. Buyers would also be unable to claim proper input tax credit on incorrectly issued invoices.

CGST vs SGST vs IGST Explained: Must Know Key Differences

TL;DR Summary

India’s GST is a dual-structure tax split between the Centre (CGST) and State (SGST) for intra-state transactions, while IGST applies to inter-state and import transactions—understanding which determines your invoice format, ITC utilization order, and compliance obligations. This guide explains all three with practical examples.

CGST and SGST apply together on intra-state transactions — CGST collected by the Central Government and SGST by the State Government, each at half the applicable GST rate — while IGST applies on inter-state transactions and imports, collected entirely by the Centre and later shared with the destination state; UTGST replaces SGST in Union Territories without their own legislature. The Place of Supply (POS) is the single deciding factor — if the supplier’s location and POS are in the same state, charge CGST+SGST; if different states, charge IGST — and ITC must be utilized in strict priority order: IGST ITC first (most flexible), CGST ITC only against CGST and IGST, and SGST ITC only against SGST and IGST, with cross-utilization between CGST and SGST strictly prohibited.

As a business, understanding the difference between CGST, SGST, and IGST is a must.

Here’s a simple guide, that will break them down with simple examples so understand clearly what each of these mean.

CGST vs SGST vs IGST: Key Differences Every Business Must Know in 2026

If you run a business in India and deal with Goods and Services Tax (GST), you have almost certainly come across the terms CGST, SGST, and IGST. These are not just abbreviations on an invoice. They decide which government — Centre or State — receives the tax money from your transaction, and they determine how you claim Input Tax Credit (ITC).

Get this wrong, and you end up filing incorrect returns, paying the wrong type of GST, or losing ITC that your business is entitled to.

This updated 2026 guide by PKC India breaks down CGST vs SGST vs IGST in simple language. We also cover UTGST (the fourth type that most articles miss), the Place of Supply concept, ITC set-off rules, real worked examples, common mistakes, and what the GST 2.0 reforms mean for your business.

What Is GST and Why Does It Have Multiple Components?

India introduced GST on 1 July 2017 to replace a complicated web of central and state taxes — including central excise, service tax, VAT, and entry taxes. The idea was simple: one tax, one market, one nation.

But India is a federal country. Both the Centre and the States have the constitutional right to levy taxes. To respect this, GST was designed as a dual-tax structure. Depending on where a transaction takes place — within a state or across states — either both the Centre and State collect tax separately, or only the Centre collects a combined tax and later shares it with the relevant state.

This is where CGST, SGST, IGST, and UTGST come in.

What Is CGST (Central Goods and Services Tax)?

CGST is the portion of GST collected by the Central Government on sales made within a single state (called intra-state transactions). It is governed by the CGST Act, 2017.

When a seller in Chennai sells goods to a buyer also in Chennai, the transaction attracts both CGST and SGST. The CGST portion goes directly to the Central Government.

Key features of CGST:

Applies to intra-state (within the same state) supply of goods and services
Collected by the Central Government
Always levied alongside SGST (or UTGST in Union Territories)
Rate is always equal to the SGST rate — both together make up the full GST rate
Maximum CGST rate cannot exceed 14%

What Is SGST (State Goods and Services Tax)?

SGST is the portion of GST collected by the State Government on intra-state sales. Each state has its own SGST Act, 2017. The revenue stays entirely with that state.

SGST replaced earlier state-level taxes such as VAT, entertainment tax, luxury tax, and purchase tax — bringing them all under one umbrella.

Key features of SGST:

Applies to intra-state supply of goods and services
Collected by the respective State Government
Revenue stays with the state where the sale happens
Always levied alongside CGST
Rate equals the CGST rate — both together add up to the applicable GST slab

What Is IGST (Integrated Goods and Services Tax)?

IGST is levied on transactions that cross state borders, as well as on imports. It is governed by the IGST Act, 2017 and is collected entirely by the Central Government, which then apportions the state’s share to the destination state.

For example, if a business in Delhi sells goods to a client in Mumbai, IGST applies. The central government collects the full IGST and transfers Karnataka’s share based on a prescribed formula.

Key features of IGST:

Applies to inter-state supply of goods and services (between two different states or Union Territories)
Also applies to imports into India
Exports are treated as inter-state but are zero-rated — no IGST is payable
Collected by the Central Government and later shared with the destination state
The IGST rate is roughly equal to the sum of the CGST and SGST rates (e.g., 18% IGST = 9% CGST equivalent + 9% SGST equivalent)

Example:

A business in Maharashtra sells goods to a buyer in Karnataka. If the GST rate is 18%, IGST of 18% is levied (not split into CGST and SGST). The central government later allocates the appropriate share to Karnataka.

For service providers specifically, read GST applicability on professional services.

UTGST — The Fourth Type Most Articles Miss

Most GST articles only discuss three components. But there is a fourth: UTGST (Union Territory Goods and Services Tax).

India has several Union Territories — such as Chandigarh, Dadra and Nagar Haveli and Daman and Diu, Lakshadweep, Andaman and Nicobar Islands, and Ladakh — that do not have their own state legislature. These territories cannot levy SGST.

Instead, UTGST is levied in place of SGST on intra-UT transactions. It is governed by the UTGST Act, 2017 and works exactly like SGST in all practical respects.

Important note: Delhi and Puducherry have their own legislatures and are treated like states for GST purposes — so they use SGST, not UTGST.

Key features of UTGST:

Applies only within Union Territories that do not have a legislature
Levied alongside CGST (just like SGST in states)
Revenue goes to the Union Territory Administration
ITC rules for UTGST mirror those for SGST
Delhi and Puducherry use SGST — not UTGST

Comparison Table: CGST vs SGST vs IGST vs UTGST

Here is a side-by-side comparison to make the differences clear:

Feature	CGST	SGST	IGST	UTGST
Full Form	Central GST	State GST	Integrated GST	Union Territory GST
Governing Act	CGST Act, 2017	SGST Act, 2017 (each state)	IGST Act, 2017	UTGST Act, 2017
Applies To	Intra-state transactions	Intra-state transactions	Inter-state & imports	Intra-UT transactions (no legislature)
Who Collects	Central Government	State Government	Central Government	UT Administration
Revenue Goes To	Centre	Respective State	Shared between Centre & destination state	Union Territory
Levied Alongside	SGST or UTGST	CGST	Neither CGST nor SGST	CGST
Max Rate Each	Up to 14%	Up to 14%	Up to 28%	Up to 14%
ITC Offset Order	CGST first, then IGST	SGST first, then IGST	IGST first, then CGST/SGST	UTGST first, then IGST
Applicable on Imports?	No	No	Yes	No
Applicable on Exports?	No (zero-rated)	No (zero-rated)	Yes (zero-rated)	No (zero-rated)

Place of Supply — The Key to Deciding Which Tax Applies

The most important concept that determines whether CGST+SGST or IGST applies to a transaction is the Place of Supply (POS). If you do not understand Place of Supply, you will almost certainly apply the wrong type of GST.

The Place of Supply is the location where a supply of goods or services is deemed to have been consumed or received under GST law. It is defined under Sections 10 to 13 of the IGST Act, 2017.

How Place of Supply Works for Goods

For goods, the Place of Supply is generally the location where the goods are delivered.

If goods are supplied and delivered within the same state — POS is that state. CGST + SGST apply.
If goods are delivered to a different state — POS is the destination state. IGST applies.
For imports — POS is the location of the importer. IGST applies.

How Place of Supply Works for Services

For services, Place of Supply rules are more complex and depend on the nature of the service:

For most B2B services — POS is the location of the registered recipient.
For most B2C services — POS is the location of the service provider.
For immovable property services (e.g., construction, renting) — POS is where the property is located.
For services related to events (e.g., conferences, exhibitions) — POS is where the event is held.
For restaurant services — POS is where the restaurant is located.

The takeaway: Always determine the Place of Supply first. The POS tells you whether it is an intra-state or inter-state transaction, which then tells you whether to charge CGST+SGST or IGST.

Worked Example: Same Product, Two Scenarios

Let us take a real example to make this completely clear. A business in Chennai, Tamil Nadu, sells steel pipes worth ₹1,00,000. The applicable GST rate is 18%.

Scenario 1 — Buyer is also in Tamil Nadu (Intra-state): CGST + SGST apply.

Scenario 2 — Buyer is in Bengaluru, Karnataka (Inter-state): IGST applies.

Details	Intra-State Sale (within Tamil Nadu)	Inter-State Sale (Tamil Nadu to Karnataka)
Product	Steel Pipes	Steel Pipes
Invoice Value	₹1,00,000	₹1,00,000
GST Rate	18%	18%
Tax Type	CGST + SGST	IGST only
CGST	₹9,000 (9%)	Nil
SGST	₹9,000 (9%)	Nil
IGST	Nil	₹18,000 (18%)
Total Tax	₹18,000	₹18,000
Who Gets Revenue?	₹9,000 to Centre; ₹9,000 to Tamil Nadu	₹18,000 to Centre; later apportioned to Karnataka
Buyer’s ITC	Can claim CGST & SGST ITC separately	Claims IGST ITC — most flexible for offset

Key takeaway: The total tax outgo (₹18,000) is the same in both cases. But the type of tax and the recipient of the revenue changes depending on where the buyer is located.

When Does CGST vs IGST vs SGST Apply? (Decision Flowchart)

Here is a simple step-by-step decision process to figure out which GST type applies to your transaction:

Step 1: Is the transaction a supply of goods or services? (If yes, GST applies. If it is an exempt supply or nil-rated, stop here.)

Step 2: Determine the Place of Supply (POS)

Use the delivery location for goods.
Use the applicable rule under Sections 12 or 13 of the IGST Act for services.

Step 3: Compare the Location of the Supplier with the Place of Supply

Same State → Intra-state transaction → Charge CGST + SGST
Different States → Inter-state transaction → Charge IGST
Supplier is in a Union Territory (no legislature) and POS is the same UT → Charge CGST + UTGST

Step 4: Check if it is an import or export

Import → IGST applies (in addition to customs duty)
Export → IGST applies but at a zero rate (you can claim refund of ITC)

Step 5: Apply the correct GST rate from the applicable slab and raise the invoice accordingly.

Common shortcut: If the supplier’s state and the buyer’s state on the invoice are the same, charge CGST + SGST. If they are different, charge IGST. When in doubt, verify the POS rules under the IGST Act.

ITC Set-Off Rules Across CGST, SGST, and IGST

Input Tax Credit (ITC) is the credit a business can claim for GST it has already paid on its purchases. This credit is then used to reduce the GST it has to pay on its sales. Understanding how ITC can be set off is crucial — using the wrong ITC type against the wrong liability can lead to cash flow problems or compliance errors.

The Priority Order for ITC Utilization

The ITC set-off rules are prescribed under Section 49 of the CGST Act, as amended. The key rules as they stand are:

Input Tax Credit (ITC) Type	First Applied To	Then Applied To
IGST ITC	IGST liability first	CGST liability, then SGST/UTGST (in any order)
CGST ITC	CGST liability first	IGST liability (only after IGST ITC is exhausted)
SGST / UTGST ITC	SGST/UTGST liability first	IGST liability (only after CGST ITC is fully used). Cannot offset CGST.

In plain language:

Your IGST ITC is the most flexible — use it to pay IGST first, then CGST or SGST in any proportion.
Your CGST ITC can only offset CGST and (if CGST ITC is not enough) IGST — never SGST.
Your SGST/UTGST ITC can only offset SGST/UTGST and (only after CGST ITC is fully used up) IGST — never CGST.
You cannot cross-use CGST ITC to pay SGST liability, or vice versa.
If none of these ITC balances cover your full liability, the remaining amount must be paid in cash.

A Practical Example of ITC Set-Off

Suppose a business has the following ITC balances and tax liabilities:

IGST ITC: ₹10,000 | CGST ITC: ₹5,000 | SGST ITC: ₹5,000
IGST Liability: ₹12,000 | CGST Liability: ₹6,000 | SGST Liability: ₹6,000

Step 1: Use IGST ITC (₹10,000) against IGST liability (₹12,000). IGST ITC is now fully used. Remaining IGST liability = ₹2,000.

Step 2: Use CGST ITC (₹5,000) to pay remaining IGST liability (₹2,000). CGST ITC remaining = ₹3,000.

Step 3: Use remaining CGST ITC (₹3,000) to pay CGST liability. CGST paid via ITC = ₹3,000. Remaining CGST liability = ₹3,000 (to be paid in cash).

Step 4: Use SGST ITC (₹5,000) to pay SGST liability (₹6,000). Remaining SGST liability = ₹1,000 (to be paid in cash).

Note: CGST ITC cannot be used for SGST liability. SGST ITC cannot be used for CGST liability.

Common Mistakes Businesses Make in CGST vs IGST Classification

Even experienced businesses get this wrong. Here are the most frequent errors PKC’s GST team encounters:

1. Treating the Billing Address as the Place of Supply

Many businesses assume that if a customer gives a billing address in another state, IGST applies. This is not always correct. The Place of Supply depends on where the goods are actually delivered or where the service is consumed — not just the billing address. Always check the POS rules under the IGST Act before raising an invoice.

2. Applying IGST on Transactions Between Two Branches in Different States

Supplies between branches or business units of the same company that are registered in different states are treated as inter-state supplies — even though no money changes hands. IGST must be levied on such internal transfers. Many businesses miss this and face ITC mismatches.

3. Confusing Place of Supply for Services

For services, the Place of Supply rules are not as straightforward as for goods. For example, if an event management company in Mumbai organizes a conference in Hyderabad, the POS is Hyderabad — even though the supplier is based in Mumbai. IGST must be charged. Using CGST + Maharashtra SGST here would be wrong.

4. Not Correcting the Wrong Tax on Time

If CGST+SGST was charged when IGST should have been (or vice versa), it must be corrected promptly. The buyer may not be able to claim ITC on the wrongly-taxed invoice. This creates a mismatch in GSTR-2B and can trigger notices from the tax department.

5. Ignoring UTGST in Transactions Involving Union Territories

Businesses often apply SGST for transactions in Union Territories like Ladakh or Lakshadweep. These territories do not have state legislatures, so UTGST applies — not SGST. Filing SGST where UTGST is applicable creates compliance errors.

6. Using CGST ITC to Offset SGST Liability

This is a common cash flow mistake. CGST ITC cannot be used to pay SGST liability, and SGST ITC cannot offset CGST liability. Businesses that do this end up with short payments on one head and excess credits on another — resulting in interest and penalties.

7. Treating All E-commerce Sales as Intra-State

E-commerce businesses often sell to customers across India. Each order must be checked individually for Place of Supply. If the customer is in a different state, IGST applies — not CGST+SGST of the seller’s state.

GST 2.0 Reforms in 2026 — What Has Changed?

India’s GST regime has gone through a significant overhaul, often referred to as GST 2.0, following the decisions of the 56th GST Council meeting. The reforms took effect from 22 September 2025. Here is what businesses need to know:

Simplified Tax Slabs

The original four-tier GST structure (0%, 5%, 12%, 18%, and 28%) has been rationalized. The primary slabs under GST 2.0 are now 5% and 18% for most goods and services. A higher slab of 40% applies to select luxury and sin goods.

Gold GST Rate Retained at 3%

Despite the broader simplification, gold continues to attract a special 3% GST rate (1.5% CGST + 1.5% SGST for intra-state, or 3% IGST for inter-state). This was a deliberate decision. Gold holds deep cultural significance in India and is a mainstream savings instrument for millions of households. Raising the rate would have stoked inflation and hurt small jewellers. Making charges on gold jewellery are separately taxed at 5%.

Zero GST on Health and Life Insurance

GST on health insurance and life insurance premiums has been brought down to 0% under GST 2.0, making these policies considerably more affordable for Indian families.

Expanded E-Invoicing Mandate

From 1 April 2026, e-invoicing is mandatory for all registered businesses with an Aggregate Annual Turnover (AATO) of ₹5 crore or more. Businesses with a turnover above ₹10 crore must report their B2B invoices to the Invoice Registration Portal (IRP) within 30 days of the invoice date.

Faster ITC Refunds

The GST 2.0 framework introduces a new automated, risk-based refund system that is expected to speed up ITC refund processing for exporters and businesses with excess credit.

Post-Sale Discounts Without Written Agreements

Businesses can now claim GST adjustments on post-sale discounts without needing a pre-existing written agreement — a practical relief for the retail and distribution sector.

The structural framework of CGST, SGST, and IGST remains unchanged under GST 2.0. What has changed is the rate structure and compliance mechanisms — not the fundamental rules for determining which type of GST applies to a transaction.

Conclusion

Understanding the difference between CGST, SGST, and IGST is not just a regulatory requirement — it is a core business skill. Getting the classification right protects your ITC claims, ensures accurate GST returns, and avoids costly compliance errors.

The three most important things to remember:

Always determine the Place of Supply before raising an invoice — it tells you whether to charge CGST+SGST or IGST.
Follow the ITC utilization priority order — use IGST ITC first, and never cross-use CGST and SGST ITC.
Do not forget UTGST — if your transaction involves a Union Territory without a legislature, UTGST applies in place of SGST.

With GST 2.0 reforms now in effect and e-invoicing expanding, maintaining accuracy in GST classification has never been more important.

At PKC India, we have been advising businesses on GST compliance, tax planning, and ITC optimization since the inception of GST in 2017. If you need help reviewing your GST classification, correcting past errors, or optimising your ITC utilization, our team of experienced Chartered Accountants is here to help.

Contact PKC India: www.pkcindia.com

Disclaimer: This article is intended for general information purposes only and does not constitute professional tax or legal advice. GST laws and rates are subject to change. Please consult a qualified Chartered Accountant for advice specific to your business situation.

FAQs on Difference between CGST, SGST, and IGST

What is the main difference between CGST and SGST?

CGST and SGST are applied together when a sale occurs within the same state. CGST goes to the Central Government, and SGST goes to the State Government, each at half the applicable GST rate. IGST applies when a sale crosses state borders or involves an import, and it is collected entirely by the Central Government, which then shares the state’s portion with the destination state.

Can CGST ITC be used to pay SGST liability?

No. Under GST law, CGST ITC cannot be used to offset SGST liability, and SGST ITC cannot offset CGST liability. IGST ITC is the only one flexible enough to be applied against any type of output tax liability — IGST, CGST, or SGST — in the prescribed order.

When does IGST apply instead of CGST and SGST?

IGST applies whenever the Place of Supply is in a different state or Union Territory from where the supplier is located. It also applies to all imports into India. If you are unsure, check the Place of Supply rules under Sections 10 to 13 of the IGST Act, 2017.

What is UTGST and when does it apply?

UTGST (Union Territory Goods and Services Tax) is levied on intra-UT transactions in Union Territories that do not have their own legislature — such as Chandigarh, Lakshadweep, Ladakh, and Andaman and Nicobar Islands. It works exactly like SGST and is always levied alongside CGST. Delhi and Puducherry, which have legislatures, use SGST instead.

Is the total tax amount different for intra-state and inter-state sales?

No, the total tax outgo is the same. For example, if the GST rate is 18%, an intra-state sale attracts 9% CGST + 9% SGST, while an inter-state sale attracts 18% IGST. The amount paid by the buyer is identical — only the type of tax and the revenue recipient differ.

What happens if I charge CGST+SGST instead of IGST by mistake?

This is a compliance error. The buyer may not be able to claim valid ITC on the incorrectly-issued invoice, and you may receive a notice from the GST department due to a mismatch in returns. The invoice must be corrected through a credit note, and the correct tax type must be re-invoiced. Doing this promptly avoids penalties and interest.

Has GST 2.0 changed how CGST vs SGST vs IGST works?

No. GST 2.0 (effective September 2025) changed the rate structure — primarily simplifying slabs to 5% and 18% for most goods — but the fundamental framework of CGST, SGST, IGST, and UTGST remains unchanged. The rules for determining Place of Supply and deciding which tax type applies are exactly the same as before.