GST Invoice Generator (India, 2026)
A GST tax invoice in India must show the supplier's name, address and GSTIN, a serial number of up to 16 characters, the date, the buyer's details and GSTIN if registered, HSN or SAC codes, taxable value, the rate and amount of CGST + SGST (same state) or IGST (different state), the place of supply, and whether reverse charge applies (CGST Rule 46). This generator works out the tax split for you.
For businesses and freelancers billing their own real sales. An invoice or receipt for a supply or payment that did not happen is a false document. Figures are entered by you and are not checked by AiStaffo.
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What a GST tax invoice must show (Rule 46, CGST Rules 2017)
| Supplier | Name, address and GSTIN |
|---|---|
| Invoice number | Consecutive serial number, up to 16 characters (letters, numbers, "-" and "/"), unique for the financial year |
| Date | Date of issue |
| Recipient | Name, address and GSTIN or UIN if registered. Unregistered buyer and value ₹50,000 or more: name, address, delivery address and state with its code |
| HSN / SAC | HSN code for goods or SAC for services: 4 digits if aggregate turnover is up to ₹5 crore, 6 digits above that |
| Goods or services | Description, quantity and unit (UQC) |
| Values | Total value and taxable value after any discount |
| Tax | Rate and amount of CGST and SGST/UTGST for a supply within the same state, or IGST between states; cess if any |
| Place of supply | State name and code, needed for inter-state supplies |
| Delivery address | If different from the place of supply |
| Reverse charge | Whether tax is payable on reverse charge |
| Signature | Signature or digital signature of the supplier or authorised person (not needed on an IRP e-invoice) |
| GST rates | Since 22 September 2025: 5% and 18% for most goods and services, 40% for luxury and sin goods, and special rates such as 0.25% and 3% |
| E-invoicing | If aggregate turnover crossed ₹5 crore in any year since 2017-18, B2B invoices must be reported on the IRP for an IRN and QR code. This tool cannot do that |
CGST + SGST or IGST?
Compare the supplier's state with the place of supply. Same state: half the rate as CGST and half as SGST (UTGST in Chandigarh, Ladakh, Lakshadweep, Andaman and Nicobar, and Dadra and Nagar Haveli and Daman and Diu). Different states: the full rate as IGST. Choose both states in the form and the generator applies the right split on every line.
The first two digits of a GSTIN are the state code, so the tool also fills the state from a GSTIN and checks its check digit.
Worked example
A Pune (Maharashtra) agency bills web design ₹40,000 (SAC 998314) with a 10% discount, plus one year of hosting ₹6,000 (SAC 998315), both at 18% GST. Taxable value: ₹36,000 + ₹6,000 = ₹42,000.
Client in Mumbai (same state): CGST 9% ₹3,780 + SGST 9% ₹3,780. Client in Bengaluru (Karnataka): IGST 18% ₹7,560. Either way the invoice total is ₹49,560, "Forty-Nine Thousand Five Hundred Sixty Rupees Only".
Time limits and other documents
For services, the tax invoice must be issued within 30 days of supply (Rule 47); for goods, before or at the time of removal or delivery. A business under the composition scheme, or one supplying only exempt goods or services, issues a bill of supply instead, without GST. A proforma invoice is only a quotation and is not a tax invoice.
For businesses: let the invoicing run itself
GST invoicing is followed by GSTR-1 filing, reconciliation with GSTR-2B and payment follow-ups every month. Raising invoices, matching payments and chasing overdue clients is routine work an AI worker can run end to end, with your team only checking exceptions. Book a free automation audit and we will show you what it would take off your desk.
Please note: this generator follows CGST Rule 46 and the GST rates as checked on 21 October 2026. It does not produce an IRP e-invoice (IRN and QR code) or an e-way bill. Confirm the HSN/SAC and rate for each item with your tax adviser.
Sources
Questions people ask
What is the format of a GST tax invoice?
When do I charge CGST and SGST instead of IGST?
How many digits of HSN do I need on an invoice?
Is amount in words mandatory on a GST invoice?
How long can a GST invoice number be?
Can I use this for e-invoicing?
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