Free GST Invoice Generator

A GST invoice generator lets a registered business produce a tax-compliant bill in the time it takes to type the customer's name. Whether you bill intra-state or inter-state, the structure of a GST invoice is the same: identify the supplier and recipient by GSTIN, list the goods or services with HSN or SAC codes, show the taxable value and the tax split as CGST, SGST and IGST, and total it up clearly. This free GST invoice generator handles the layout for you. Fill in the form, watch the live preview update, and download a clean PDF you can email or print. No signup, no watermark, nothing to install. The tax panel breaks CGST and SGST out separately, and the payment section accepts UPI QR codes so your customer can pay in two taps.

What is a GST invoice?

A GST invoice is a tax invoice issued under the Goods and Services Tax regime. It records a supply of goods or services, shows the tax charged on that supply, and lets the recipient claim input tax credit when eligible. Every registered person with a turnover above the threshold must issue a GST invoice for every taxable supply. The document needs specific fields — supplier GSTIN, recipient GSTIN when registered, invoice number, issue date, place of supply, HSN or SAC code, taxable value, and the tax split. The structure sounds heavy, but the GST invoice generator above formats all of it for you; you just enter the values.

CGST, SGST and IGST explained

GST is split into three components depending on whether the supply is intra-state (within one state) or inter-state (across state borders). For an intra-state supply, the tax is divided equally into Central GST (CGST, collected by the centre) and State GST (SGST, collected by the state). For an inter-state supply, the entire tax is collected as Integrated GST (IGST) by the centre and later apportioned to the consuming state. The total tax amount is identical for the same rate — only the split changes. For example, a 1,000 rupee service billed at 18% within Karnataka carries 90 as CGST and 90 as SGST. The same service billed from Karnataka to Maharashtra carries 180 as IGST.

GSTIN, HSN and SAC codes

• GSTIN: The 15-character Goods and Services Tax Identification Number issued to every registered taxpayer. Show it for both the supplier and the recipient when the recipient is registered.
• HSN code: The Harmonised System of Nomenclature code that classifies goods. Businesses with turnover above a threshold must declare HSN codes on invoices for goods.
• SAC code: The Services Accounting Code, the equivalent of HSN for services. Required on invoices for services above the relevant threshold.
• Place of supply: The state or union territory where the supply is consumed. This determines whether CGST/SGST or IGST applies.
• Reverse charge: A flag indicating that the recipient, not the supplier, pays the tax. Most B2B supplies are forward charge; a few, like certain specified services, are reverse charge.

How to create a GST invoice

1. Open the GST invoice generator above and pick a template that matches your brand.
2. Enter your legal business name, address, and GSTIN in the Your Business section.
3. Add the customer's name, address, and GSTIN in the Bill To section if they are registered.
4. Fill in the invoice number, issue date, and due date. Use a unique sequential number — never reuse one.
5. Add a row for each supply with description, HSN or SAC, quantity, and unit price.
6. Set the tax rate in the totals panel — the live preview splits it into CGST and SGST for intra-state, or shows it as IGST when you mark the supply as inter-state.
7. Add UPI payment details and a QR code if you accept mobile wallet payments.
8. Preview the document, verify every required field is present, download the PDF, and email it to the customer.

Related GST tools and guides

Once you have the invoice format right, the next step is making sure the math is correct and you understand the rules. Pair this GST invoice generator with our GST calculator for quick tax math, and read the full GST guide for slabs, registration thresholds, and input tax credit rules.

Frequently asked questions