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

CGST (Central GST) and SGST (State GST) are each charged at half the total GST rate for intra-state transactions — both go to central and state government respectively. IGST (Integrated GST) is charged on inter-state transactions at the full GST rate and goes to the central government, which then distributes the state share.

Who needs to register for GST?

GST registration is mandatory if your annual turnover exceeds ₹40 lakhs (goods) or ₹20 lakhs (services). If you supply goods or services across states, registration is compulsory regardless of turnover. Voluntary registration is also possible even below the threshold.

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Finance Calculator

GST Calculator

Calculate GST inclusive or exclusive amounts.

Amount (₹)

₹

GST Rate (%)

Enter values and click Calculate to see results

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What is GST Calculator?

GST (Goods and Services Tax) is a comprehensive indirect tax that replaced multiple taxes like VAT, service tax, and excise duty in India. It was implemented on 1 July 2017. GST has 5 slabs: 0%, 5%, 12%, 18%, and 28%. Most services fall under 18% GST. CGST and SGST apply to intra-state transactions; IGST applies to inter-state transactions. Understanding GST is important for business owners, freelancers, and consumers.

Formulas

Add GST to a Price (Exclusive → Inclusive)

GST Amount = Original Price × (GST Rate / 100) | Total = Original Price + GST Amount

Where:

Original PricePrice before GST (exclusive of GST)

GST RateApplicable GST rate (5%, 12%, 18%, 28%)

Remove GST from a Price (Inclusive → Exclusive)

Original Price = GST Inclusive Price × 100 / (100 + GST Rate)

Where:

GST Inclusive PricePrice that already includes GST

Worked Example

A software service invoice of ₹50,000 excluding GST at 18%:

Base Price (exclusive of GST)₹50,000

GST Rate18% (CGST 9% + SGST 9% for intra-state)

GST Amount₹50,000 × 18/100 = ₹9,000

Total Invoice Amount₹50,000 + ₹9,000 = ₹59,000

CGST (9%)₹4,500

SGST (9%)₹4,500

✅ Your total invoice amount is ₹59,000. The GST of ₹9,000 is split equally as CGST and SGST for intra-state transactions.

Tips & Important Notes

💡Register for GST if your annual turnover exceeds ₹40 lakhs (₹20 lakhs for service providers, ₹10 lakhs for special category states).
💡Input Tax Credit (ITC) allows GST-registered businesses to claim back GST paid on purchases.
💡0% GST: basic food items, education, health services. 5%: transport, economy hotels. 12%: processed food, business class hotels. 18%: most services, electronics. 28%: luxury goods, automobiles.

Frequently Asked Questions (FAQs)

India has five GST slabs: 0% (essential items like grains, milk), 5% (economy class travel, basic packaged food), 12% (processed food, business hotels), 18% (most services, electronics, restaurant food), and 28% (luxury goods, tobacco, automobiles). Some items like petroleum products are not under GST.