🧾 100% free · no login · works on mobile

Free GST Billing Software: Unlimited GST Invoices with UPI QR

Make GST tax invoices with HSN codes, auto CGST + SGST or IGST by place of supply, round-off and amount in words. Customers and items are remembered for next time, every invoice is saved with its payment status, and each one carries a UPI QR for the exact balance.

QUICK ANSWERA GST tax invoice must show the supplier’s name, address and GSTIN, a unique serial number for the financial year, invoice date, the buyer’s name (and GSTIN if registered), place of supply, HSN/SAC, quantity, taxable value, the GST rate and amount (CGST + SGST for same-state, IGST for inter-state) and a signature. This free tool fills all of that, numbers invoices as INV/25-26/001, and saves them so you can track what is still unpaid.

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Want this synced, automatic and collecting payments?

Same workflow in a free FastFee account, on every device and for your whole team
Automatic WhatsApp reminders before and after due dates
Payment links, UPI and AutoPay with auto receipts and live “paid” status

Start free with OTP signup →Mobile OTP verification. No card required.

What you get free in the Free GST Billing Software

✅ Unlimited GST invoices, no watermark
✅ Auto CGST/SGST vs IGST from place of supply
✅ HSN/SAC, discount %, multiple GST rates
✅ Saved customers and products auto-fill
✅ Amount received and balance due
✅ UPI QR for the exact amount on the invoice
✅ Invoice register CSV for your CA
✅ Print / Save as PDF, WhatsApp share

Free alternative to paid GST billing apps

Tool	What it costs	What you get free here
FastFee Free GST Billing Software	₹0, no limits	Unlimited GST invoices, no watermark · Auto CGST/SGST vs IGST from place of supply · HSN/SAC, discount %, multiple GST rates
Vyapar	Mobile plans around ₹699+/yr; desktop higher	Unlimited GST invoices + QR payment, free
myBillBook	Paid plans around ₹3,490/yr	GST billing + saved items, free
GoGSTBill	Around ₹1,949/yr	GST invoice generator, free
Kernel GST / CaptainBiz / Saral Billing	₹2,999–₹7,500 per year or lifetime	Simple GST billing + customer ledger, free
Zoho Invoice	Free with limits	No document limits in this tool

Prices are approximate starting prices seen on public pricing pages and app listings in 2026 and change often; check each provider for current plans. Product names belong to their owners. FastFee is not affiliated with them. Paid tools often include features this free tool does not, such as accounting, GST filing or multi-user sync.

How to use the Free GST Billing Software

STEP 1
Add business details
Name, address, GSTIN, state and UPI ID are saved once and printed on every document.
STEP 2
Fill the tax invoice
Pick a saved customer or type a new one, add items (saved items auto-fill rate and tax).
STEP 3
Preview and save
Check the preview, save it to your register and print or save as PDF.
STEP 4
Share and get paid
Send it on WhatsApp; the UPI QR lets the customer pay the exact amount.

Frequently asked questions

Is this GST billing software really free?

Yes. Unlimited invoices, no watermark and no login. Data stays in your browser. FastFee earns when businesses choose to collect payments online through a FastFee account, not from billing fees.

When is IGST charged instead of CGST and SGST?

If the place of supply (buyer’s state) is different from your state, the supply is inter-state and IGST applies. If both are in the same state, the GST is split equally into CGST and SGST. Set your state in business details and the buyer’s state on the invoice; the tool picks the right one.

Can I generate an e-invoice (IRN) here?

No. E-invoicing with IRN is mandatory only above the turnover threshold notified by GSTN and must be generated on the IRP portal. For businesses below the threshold, a regular tax invoice like this is what you issue.

How do I convert a quotation into an invoice?

Open the free quotation maker, create or open the quote and click “Convert to invoice”. It opens here with the same customer and items and a new invoice number.

Can I back up my invoices?

Use Saved → Export register CSV for a monthly backup and for GSTR-1 preparation. A free FastFee account keeps invoices synced and lets customers pay online.

Is this tool free? Do I need to sign up?

Yes, it is completely free with no login and no limit on entries. Signing up for a free FastFee account is optional and adds sync across devices, team access, automatic reminders and online payment collection.

Where is my data stored?

Only in your browser on this device (local storage). Nothing is uploaded to FastFee. Clearing browser data deletes it, so export a CSV or PDF backup regularly.

More free billing & invoicing tools

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