For any business that sells goods or services across state lines, understanding interstate supply under GST is not optional. It decides which tax you charge, how you file returns, and whether you need GST registration in the first place. Confusion about interstate transactions with an interstate one is one of the most common compliance mistakes among growing businesses, and it can lead to notices, blocked input tax credit, and penalty interest. In this blog we are going to discuss all about interstate supply meaning, the rate of tax that applies, the rule a business must follow, and real-world examples so that you can classify all the transactions correctly.
Also read: GST: A game changer for small business growth
What is interstate supply in GST
Under section 7 of the IGST Act, 2017, a transaction is classified as interstate supply in GST when the location of the supplier and the place of supply fall in two different states or union territories. The moment goods and services cross a state boundary as a part of a taxable transaction, they stop being subject to CGST and SGST and instead attract IGST. The interstate supply meaning in GST is therefore tied entirely to geography when the supplier is registered versus where the supplier is legally deemed to be received.
Supply of goods and services from one state/UT to different states/UT
Goods and services imported into India.
Export of goods and services out of India
Supply to or by Special Economic Zone (SEZ) developer or unit, regardless of the physical location of the recipient
Supply of a good to a tourist under section 15 of the IGST Act.
Interstate supply vs. intrastate supply: what's the difference?
There are confusions related to what is interstate supply and intrastate supply, but put it simply, this is one of the simplest terms ever to understand. Section 8 of the IGST Act defines intrastate supply under GST. Getting this distinction right matters, because the interstate and intrastate difference directly changes which tax head, CGST/SGST or IGST, appears on your invoice.
Location: The only distinction between interstate and intrastate supply is whether the provider and the location of supply are located in the same state or in different states.
Tax charged: intrastate supply attracts CGST and SGST, and interstate supply attracts IGST.
Invoice: An intrastate invoice splits tax into two different lines, whereas an interstate invoice shows a single IGST line
Exception: Even if the supplier and the SEZ unit are located in the same state, SEZ transactions are always subject to interstate supply GST.
Intrastate supply, meaning purely local trade, narrows to interstate supply, which covers both cross-state and cross-border movement.
The subject of interstate versus intrastate supply essentially boils down to one factor: does the location of supply correspond with the state of the supplier or not? Every cross-border and cross-state transaction should be treated as interstate by default if you're still mapping out the interstate supply and intrastate supply difference for your own invoicing. Before filing, make sure it complies with Sections 7 and 8.
GST rate on interstate supply (IGST)
The idea that GST on interstate supplies is more expensive than intrastate sales is a prevalent myth. It doesn't. The interstate supply GST rate is intended to be revenue-neutral; it is assessed at a rate equivalent to the sum of the CGST and SGST rates that would have been applicable if the identical products or services had been sold inside a single state. Since the GST 2.0 rate rationalization went into effect on September 22, 2025, India's GST structure is mainly divided into two slabs: 5% and 18%, with a separate 40% rate set aside for certain luxury and sin goods. When a product crosses a state line, the same percentage is charged as interstate GST.
Standard goods and services taxed at 5% intrastate attract 5% IGST when supplied interstate.
Standard goods and services taxed at 18% intrastate attract 18% IGST when supplied interstate.
Luxury and sin goods in the 40% brackets attract 40% IGST when supplied across states.
Before invoicing interstate supply GST transactions, always verify the relevant HSN/SAC code because the GST Council regularly modifies rates and item classifications.
CGST, SGST, and IGST: how they compare
Understanding the relationships between the three tax components is crucial to understanding interstate supply mechanics. While IGST is collected as a single tax on interstate supplies and thereafter distributed between the destination state and the center, CGST and SGST are collected jointly on intrastate supplies and divided equally between the federal government and state governments.
CGST (central GST): the central government share on intrastate supplies
SGST/UTGST: the state or union territory government share on intrastate supplies
IGST (Integrated GST): a single tax on interstate supplies, imports, and SEZ transactions, collected by the center and shared with the destination state.
IGST vs. CGST and SGST is not a question of which costs more; the total tax rate is identical; only the collection mechanism and revenue sharing root differ
Rules governing interstate supply under GST
Beyond classification, registration, invoicing, and compliance requirements are governed by a series of interstate supply regulations. Since the destination state is where the goods or services are actually consumed, these GST regulations for interstate delivery are in place to ensure that tax is appropriately credited to that state.
Every interstate transaction under GST must be reported separately in GSTR-1 and GSTR-3B, with place of supply details for each invoice.
Tax invoices for interstate supply must show IGST as a single line item, not split into CGST and SGST.
Input tax credit of IGST can be used to pay IGST, CGST, or SGST liability in that order of preference.
A business cannot use CGST credit to pay SGST liability, or vice versa, even for interstate transactions.
Since they establish whether a supply is initially intrastate or interstate, the place-of-supply regulations under Sections 10–13 of the IGST Act must be examined for every transaction.
GST registration for interstate supplies:
Depending on whether you provide goods or services, GST registration for interstate supply operates differently. Regardless of yearly revenue, anyone making an interstate taxable supply of goods is required by Section 24 of the CGST Act to register for GST; there is no small-business exemption for moving products between states.
Interstate supply of goods: Mandatory GST registration from the very first transaction
Interstate supply of service: exempted from compulsory registration up to the standard threshold under the specific government notification.
Casual taxpayer persons and non-resident taxpayer persons making interstate supplies also make registration compulsory
Job workers sending jobs interstate on a principal's instructions may be exempt from registration in specific circumstances
E-way bill requirement for interstate supplies:
Movement of goods rarely happens without any paperwork, and the e-way bill for interstate supplies is one compliance step businesses frequently go wrong. An e-way bill is mandatory under Rule 138 of the CGST rules whenever goods more than Rs. 50,000 move from one state to another, regardless of the mode of transport.
Threshold: An e-way bill is required for consignment value above Rs. 50,000 for interstate movement.
validity: linked to distance; longer routes get a longer validity period
Applies even when goods move between two branches of the same business located in different states.
Non-compliances can lead to detention of goods and penalties during transit checks
Interstate supply to SEZ
Interstate supply to SEZ developers and units gets special treatment under GST law. Section 7(5) of the IGST Act deems any supply to or by an SEZ as an interstate supply, even if the supplier and the SEZ unit are physically located in the same state.
Supplies to SEZ units are related to zero-related supplies under section 16 of the IGST Act.
The supplier can export under a letter of undertaking without paying IGST or pay IGST and later claim a refund.
An endorsement on the invoice from the authorized SEZ officer is a mandatory compliance step for the zero-rating to apply.
Domestic tariff area (DTA) sales by an SEZ unit are treated differently and typically attract import duty in addition to GST.
FAQs
What is the difference between intrastate and intrastate supplies under GST?
Intrastate supply means when the supplier’s location and place of supply fall in the same state or in the same region. On the other hand, interstate supplies mean when the supplier location and place of supply fall in different states or regions.
Is GST registration mandatory for the interstate supply of services?
Not always, unlike interstate supply of goods, which requires compulsory registration from the first transaction; interstate supply of services is exempted from compulsory registration up to the standard turnover threshold under a specific government notification.
What GST rate applies to interstate supplies?
The CGST + SGST rate that would be applicable to the same products or services if they were sold inside a single state is identical to the IGST rate applied to an interstate supply. This means that interstate deliveries are taxed at 5%, 18%, or 40% under the existing GST 2.0 system, depending on the item's classification; there is no additional or higher rate simply because the supply crosses a state border.
Is an E-way bill required for interstate movement of goods?
Regardless of the mode of transportation, an e-way bill is required for interstate movement of goods anytime the consignment value exceeds ₹50,000. This holds true even if products are just being transported between two locations of the same company in different states.