Generate GST-ready tax invoices for your business in minutes. Add your GSTIN, HSN/SAC codes and customer state, and this free GST invoice generator automatically calculates CGST, SGST or IGST based on deterministic JavaScript maths — never estimated or AI-generated.
A GST invoice (or tax invoice) is a document issued by a GST-registered business that shows the taxable value of goods or services, the applicable GST rate, and the tax amount charged, in addition to standard invoice details like item description and total payable.
GST is calculated as a percentage of the taxable value of goods or services. For GST-exclusive pricing, GST = taxable value × GST rate / 100, added on top of the price. For GST-inclusive pricing, the taxable value is derived by dividing the total price by (1 + GST rate/100).
For sales within the same state, tax is split equally between Central GST (CGST) and State GST (SGST). For sales between different states, Integrated GST (IGST) is charged as a single combined rate instead. This tool applies the correct split automatically based on the business and customer state you enter.
Yes, GST, CGST, SGST and IGST are all calculated automatically and deterministically as you enter your items and states.
Yes, there is a dedicated HSN/SAC field for every item.
No. This is an independent, free invoicing tool. It is not affiliated with or endorsed by the Government of India or the GST Network.