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GST INVOICE SOFTWARE

GST Invoice Software to Create Accurate Bills in Seconds

Create professional, GST-compliant tax invoices with automatic tax calculation, GSTIN auto-fill and a UPI QR code. Print or share in a click, all inside Billing Saathi.

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CGST + SGST / IGST
GSTIN auto-filled
UPI QR added
billingsaathi.com / sale-invoice
Billing Saathi GST invoice creation screen
Paste image link hereHero image · about 1600 × 900 px (16:9)
GST calculated automatically GSTIN auto-fill HSN/SAC ready 12 invoice templates UPI QR code WhatsApp & email sharing Sale return & credit note E-invoice & e-way bill ready
TRY IT YOURSELF

See How GST Is Calculated on an Invoice

Enter an amount and a GST rate to see how the tax splits. Billing Saathi does this for you on every invoice, based on the place of supply.

  • Sale within the same state: CGST + SGST, half each
  • Sale to another state: IGST, the full rate

For illustration only. Use the GST rate that applies to your goods or services.

GST invoice calculator
Taxable amount₹10,000.00
CGST (9%)₹900.00
SGST (9%)₹900.00
Total GST₹1,800.00
Invoice total₹11,800.00

Illustration only. Rates and rules can change, so confirm them for your case.

1234
SAMPLE
TAX INVOICEYour Business Name
GSTIN: 24ABCDE1234F1Z5
Invoice No.INV-2026/0001Date: 15 Oct 2026
Bill toCustomer Name
GSTIN: 27AAAAA0000A1Z5
Place of supplyGujarat (24)
ItemHSNQtyRateTaxable
Sample item A610510500.005,000.00
Sample item B62034750.003,000.00
Taxable value₹8,000.00
CGST @ 9%₹720.00
SGST @ 9%₹720.00
Total₹9,440.00
ANATOMY OF AN INVOICE

What a GST Invoice Includes

A GST invoice, also called a tax invoice, is the document a GST-registered business issues when it sells goods or services. Your customer uses it to claim input tax credit, so every detail matters.

  • 1
    Invoice detailsA unique invoice number (up to 16 characters) and the invoice date.
  • 2
    Party detailsSeller and buyer names, addresses and GSTIN, plus the place of supply.
  • 3
    Goods or servicesDescription, HSN/SAC code, quantity and taxable value.
  • 4
    Tax detailsCGST + SGST within a state, IGST between states.

Billing Saathi fills these in from your records. GST rules can change, so always check the latest official notifications.

GST INVOICE FEATURES

Everything You Need to Create GST Invoices Faster

Simple enough for a small shop, complete enough for a growing business.

Create in Seconds

Generate a GST-ready sale invoice in a few clicks, with no spreadsheets and no manual math.

Automatic Tax Calculation

GST is worked out for you, with CGST/SGST or IGST applied based on the place of supply.

GSTIN Auto-Fill

Enter a GSTIN and the customer's details are filled in for you.

Products, HSN/SAC & Units

Save items with HSN/SAC codes and units, then add them in one click.

Flexible Options

Discounts in ₹ or %, reverse charge and a separate ship-to address.

12 Invoice Templates

Pick a template, then set paper size, logo, bank details and signature.

WhatsApp & Email

Send invoices as PDFs using ready-made message templates.

UPI QR Code

Add a UPI QR code so customers can pay by scanning.

HOW IT WORKS

Create a GST Invoice in 4 Simple Steps

  1. 1

    Choose your customer

    Pick an existing customer or add a new one with GSTIN auto-fill.

  2. 2

    Add your products

    Select items, then set quantity, price and any discount.

  3. 3

    Check tax and totals

    GST is calculated automatically based on the place of supply.

  4. 4

    Print, share and get paid

    Send the invoice by WhatsApp or email, with a UPI QR code for payment.

Sale invoice form with products and GST totals in Billing Saathi
Paste image link hereHow it works image · about 1200 × 900 px
BEYOND THE INVOICE

From First Quote to Final Payment

Handle your whole sales cycle in one place, without switching tools.

Quotation

Send a professional quote to your customer.

Sale Order

Confirm the order and track it.

GST Invoice

Turn it into a GST-ready invoice.

Payment

Record payments and track what is pending.

Return & Credit Note

Handle returns and adjustments.

WHO IT'S FOR

Built for Every GST-Registered Business

If you sell goods or services and charge GST, Billing Saathi makes invoicing quick and accurate.

Retailers & Small Shops Wholesalers & Distributors Manufacturers Service Providers Freelancers & Consultants Pharma & FMCG Growing MSMEs Traders
GST INVOICE FAQ

Questions? We Have Answers

The basics of GST invoicing, and how Billing Saathi helps.

Still have questions?

Talk to our team and we will help you get started.

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What is a GST invoice?
A GST invoice, also called a tax invoice, is the document a GST-registered business issues when it sells goods or services. It shows the taxable value, the GST charged and the details of both parties, and helps your customer claim input tax credit.
What details must a GST invoice include?
Generally the supplier's name, address and GSTIN, a unique invoice number and date, the recipient's details, a description of the goods or services with HSN/SAC code, quantity, taxable value, the tax rate and amount, and the place of supply. Check the latest GST rules for your case.
When do I charge CGST, SGST or IGST?
Generally, for sales within the same state you charge CGST and SGST, and for sales to another state you charge IGST. The place of supply decides which one applies.
What is the difference between a tax invoice and a bill of supply?
A tax invoice is issued by registered businesses that charge GST. A bill of supply is issued instead by composition taxpayers, or for exempt supplies, where GST is not charged.
Does Billing Saathi create GST-compliant invoices?
Yes. Billing Saathi generates GST-ready invoices with automatic tax calculation, GSTIN auto-fill, and HSN/SAC details taken from your records.
Can I add a UPI QR code and share invoices on WhatsApp?
Yes. You can add a UPI QR code to your invoice and share it as a PDF through WhatsApp or email.

Create your first GST invoice in minutes

Start with a free trial and see how easy GST billing can be.

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Billing Saathi is software and does not provide tax or legal advice. GST rules and invoice requirements can change, so please confirm the latest requirements on the official GST portal or with your tax professional.