GST Bill Generator & Calculator India 2026 | Invoice with GST, Tax Rate & ITC
Free GST invoice calculator for Indian businesses. Calculate GST at 5%, 12%, 18%, 28% rates. Generate invoices with HSN codes, ITC (Input Tax Credit), SGST, CGST, IGST. Perfect for small businesses, e-tailers, and service providers.
Updated for 2026
Invoice Details
Seller & Buyer Details
✓ Last updated: March 2026 | Built with CRA-official rates, Bank of Canada data, and OSFI guidelines
How to Use This Calculator
Add product name, quantity, rate, and HSN/SAC code.
Choose 5%, 12%, 18%, or 28% based on the product category.
Intra-state (within same state) uses SGST+CGST. Inter-state uses IGST.
Enter seller and buyer GSTIN for ITC-compliant invoice.
Review the invoice and download the PDF.
Understanding Your Results
- Taxable ValueThe value of goods/services before GST is applied.
- SGST + CGSTIntra-state sales: GST is split equally between state (SGST) and central (CGST) governments.
- IGSTInter-state sales: Full GST goes to the central government (IGST).
- ITC (Input Tax Credit)Tax paid on inputs that can be credited against output tax liability.
Key Tips
- ✓Use correct HSN/SAC codes – wrong codes lead to incorrect GST rates and invalid invoices.
- ✓Always include GSTIN for B2B sales – buyers need it to claim ITC.
- ✓For intra-state sales, use SGST+CGST. For inter-state, use IGST.
- ✓ITC can reduce your tax liability – claim all eligible input tax credits.
- ✓Keep digital copies of all GST invoices for 6 years (audit requirement).
Related Calculators
Understanding GST in India
What is GST?
GST (Goods and Services Tax) is a unified tax that replaced 17 different central and state taxes. It is a consumption tax – ultimately paid by the end consumer, while businesses get ITC (Input Tax Credit) on inputs.
GST Rates in India 2026
0% (Exempt): Life-saving medicines, basic food. 5% (Low): Packaged food, clothing. 12% (Standard): Mobile phones, computers. 18% (High): Branded clothes, cosmetics, furniture. 28% (Highest): Luxury cars, aircraft.
SGST, CGST, and IGST
Intra-state: GST split 50-50 between state (SGST) and central (CGST). Inter-state: Full GST goes to the central government (IGST).
Input Tax Credit (ITC)
ITC is tax paid on inputs that can be credited against output tax. Claiming ITC reduces your net GST payment to the government.
GST Invoice Example: Laptop Sale
2 laptops at ₹50,000 each, 18% GST, inter-state sale.
- Item
- Laptop
- Quantity
- 2
- Rate
- ₹50,000
- GST Rate
- 18%
- Sale Type
- Inter-State
- Taxable Value
- ₹1,00,000
- IGST (18%)
- ₹18,000
- Total Invoice
- ₹1,18,000
Frequently Asked Questions
Clear answers to common questions to help you use this calculator confidently.
How do I determine the correct HSN code for my product?
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How do I determine the correct HSN code for my product?
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HSN code can be found on the GST portal (search by product name). Common codes: Computers (8471) → 18%, Food (2106) → 5%, Mobile (8517) → 18%. Use official HSN finder to avoid penalties.
What's the difference between SGST/CGST and IGST in this calculator?
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What's the difference between SGST/CGST and IGST in this calculator?
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If buyer and seller are in same state (intra-state): SGST + CGST (split 50-50). If different states (inter-state): IGST (full amount). Use toggle to select.
Can my customer claim ITC on my invoice?
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Can my customer claim ITC on my invoice?
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Only if: (1) You're GST registered (valid GSTIN), (2) Invoice has correct HSN code, (3) Customer is also GST registered. Without these, ITC cannot be claimed.
What if I invoice the wrong HSN code?
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What if I invoice the wrong HSN code?
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Invoice becomes invalid for ITC purposes. Customer cannot claim credit. Relationship broken. Fix: Issue credit note, re-invoice with correct code.
Do I need to register for GST?
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Do I need to register for GST?
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If turnover >₹20 lakh (₹10 lakh for services), registration is mandatory. Below threshold, optional but recommended for ITC eligibility.
Can I manually override the GST rate in the calculator?
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Can I manually override the GST rate in the calculator?
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Yes, but be careful. Manual rates should only be used for specific exemptions (documented). Default rates are government-mandated.
How do I file GSTR using this invoice?
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How do I file GSTR using this invoice?
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Export invoice as PDF. Report all line items in GSTR-1 with matching HSN codes and amounts. Filing must happen within 11 days of invoice date.
What's the penalty for wrong GST invoicing?
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What's the penalty for wrong GST invoicing?
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₹10,000-₹1 lakh per wrong invoice + 10% of invoice value + prosecution risk. Especially severe for false ITC claims.
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