A customer in another state ordered, do I charge IGST or CGST + SGST?
The short answer
GST is a destination-based tax, so what matters is the 'place of supply', where the goods are delivered. Ship inside your own state and you charge CGST + SGST; ship to any other state and you charge IGST at the same total rate, so the customer pays the same tax either way. Your billing tool splits this automatically from the buyer's shipping pincode, so you rarely calculate it by hand.
A quick summary to orient you. The real value is below: the resources worth your time, from people who've actually done it, not us.
Here are the resources
Hand-picked from around the web, each with a note on why it earns your time. India-specific ones carry a badge.
4 resources4 India-specific4 link-checked
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📄 Article
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Why we picked it
Place of supply is the concept that decides IGST vs CGST+SGST on every order, this explains the delivery-location rule with worked examples so it finally clicks.
Why we picked it
The clearest breakdown of the four GST components and how input credit flows between them, foundational reading before you look at a single invoice.
Why we picked it
A tight side-by-side of interstate vs intrastate supply with rate examples, the fastest way to sanity-check whether an order should carry IGST or CGST+SGST.
Why we picked it
Written from an accounting-software lens, it shows how place of supply is configured on real invoices, handy if you'll run books in Zoho and want the tax auto-split correctly.
