Free tool · no sign-up
Free GST invoice generator
Click and type straight on the invoice — add items row by row, and the tax, round-off and amount in words are worked out as you go. Print or save as PDF, or share on WhatsApp. Free, no sign-up, and the invoice stays in your browser.
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How it works
- 1Click and type on the pageYour details, the party, items and terms go straight onto the A4 document.
- 2GST works itself outCGST + SGST or IGST from the two states, totals, round-off and the amount in words.
- 3Download, print or WhatsAppSave a one-page A4 PDF, print it, or send a summary on WhatsApp.
Runs in your browser. Nothing you type or upload is sent to Cashflow OS.
Making an invoice in five steps
- Your details: business name, address, GSTIN and state. Add a logo if you like; it is kept only in this browser.
- Buyer's details: name, billing address, GSTIN (for a registered buyer) and state. Typing the GSTIN picks the state from its first two digits.
- Invoice number and dates: the invoice date and, if you give credit, a due date.
- Items: description, HSN or SAC, quantity, unit, rate, discount % and GST %. Tax is split into CGST and SGST when both states match, or charged as IGST when they differ.
- Finish: add notes, bank details or a UPI ID for a payment QR, then print, save as PDF or share a summary on WhatsApp.
What the numbers look like
Say you bill 10 units at ₹1,250 with no discount, at 18%, to a buyer in your own state. The taxable value is ₹12,500, CGST is ₹1,125, SGST is ₹1,125 and the total is ₹14,750, written as "Rupees Fourteen Thousand Seven Hundred Fifty Only". If one line has paise in it, the round-off line takes the total to the nearest rupee and shows the difference, so the buyer sees exactly how the final figure was reached.
Fields a GST tax invoice needs
A tax invoice from a registered business should carry, among other things: your name, address and GSTIN; a serial number unique for the financial year; the date; the buyer's name, address and GSTIN if registered; HSN or SAC; description, quantity and unit; taxable value after discount; the rate and amount of each tax; the place of supply with the state for inter-state sales; and a signature. The full list and a sample are on the GST invoice format page and in GST invoice mandatory fields.
If you are under the composition scheme, or you sell only exempt goods, you issue a bill of supply instead, without tax lines.
Numbering and good habits
- Keep one running series per financial year, for example INV/26-27/001. Do not reuse or skip numbers; a cancelled invoice keeps its number, marked cancelled. See invoice numbering rules.
- Write the due date and payment terms on the bill itself. It makes the later reminder easier.
- Check the buyer's GSTIN before you bill. A wrong GSTIN means the buyer cannot take credit, and you will have to amend it in your return.
- Keep a copy. The draft here is saved in this browser only; save the PDF to your own folder or drive.
When the bill is not paid on time
Once the due date passes, use the payment reminder generator to send a polite note on WhatsApp, or the overdue interest calculator to work out interest at the rate you agreed.
If your books are in TallyPrime, Cashflow OS lets your team create sales and other vouchers from the phone, which the connector writes into Tally, and share bills and party statements on WhatsApp.
Questions people ask
Is this invoice valid for GST?
It has the fields a tax invoice needs, but whether a given invoice is correct depends on what you fill in: GSTIN, HSN, rate and place of supply. Check them before you issue it.
Do I need e-invoicing?
E-invoicing (IRN and QR from the invoice registration portal) applies to businesses above the turnover limit notified by the government. This tool does not generate an IRN; if you are covered, report the invoice on the portal.
Where is my invoice saved?
Only in this browser, as a draft. Nothing is sent to our server. Print or save it as a PDF to keep a copy.
Can I add my UPI QR to the invoice?
Yes. Enter your UPI ID and the invoice shows a QR for the total amount that the buyer can scan with any UPI app.
How do I bill a buyer in another state?
Choose the buyer's state (or type their GSTIN). The tool sees the two states differ and charges IGST instead of CGST and SGST.
General information for Indian businesses, not tax or legal advice. GST rates and rules change by notification — check cbic-gst.gov.in or ask your CA before you rely on a figure.
