GST billing software built for Indian businesses
Create GST-compliant invoices in under a minute. Finvosmart calculates CGST, SGST or IGST on every line, prints HSN/SAC codes, puts a UPI pay link on every invoice, and turns your sales into GSTR-1 and GSTR-3B files ready to upload — so month-end stops being a scramble.
7-day free trial · No credit card · Updated
GST Billing Software at a glance
Tax worked out for you
Set the GST rate on an item once. Every invoice then splits tax into CGST + SGST for sales within your state, or IGST for sales to another state.
HSN/SAC on every line
Each line carries its HSN or SAC code, quantity, unit, taxable value and tax — the details GST law expects on a tax invoice.
Get paid from the invoice
Every invoice carries a UPI QR code and a private view-and-pay link. Record part payments and the TDS your customer deducted; reminders go out by email and WhatsApp.
GSTR-1 and GSTR-3B, ready to upload
GSTR-1 section by section as the portal's JSON file or as Excel, and GSTR-3B with your input tax credit checked against GSTR-2B — built straight from your books.
Invoices on WhatsApp
Connect your WhatsApp Business account to send invoices to customers on WhatsApp, or download the PDF and share it yourself.
Your colours and notes
Start from a preset template and set its colour, a note under the heading, footer terms, and whether bank and UPI details and a signature line print — for invoices, quotations, proformas, delivery challans and credit notes.
From quotation to invoice, stock included
Your customer accepts the quotation from its link and you are told. It then becomes the tax invoice in one step, linked both ways and never twice, and issuing the invoice takes the items out of stock — the stock in hand shows as you pick each item.
What a GST invoice must include
Under Rule 46 of the CGST Rules, a tax invoice needs more than a total and a signature. Finvosmart builds these fields into every invoice so you never have to remember them:
- Your name, address and GSTIN
- A unique invoice number of up to 16 characters, in a consecutive series for the financial year
- Invoice date
- Customer name, address and GSTIN (if registered)
- Place of supply, with the state name and code for sales to another state
- HSN code for goods or SAC code for services, with description, quantity and unit
- Taxable value, GST rate and the CGST, SGST or IGST amount
- Signature or digital signature of the supplier
CGST + SGST or IGST — which applies?
It depends on where the sale happens. When you and your customer are in the same state, GST is split equally into CGST (central) and SGST (state) — 18% becomes 9% + 9%. When the place of supply is in another state, the full rate is charged as IGST.
In Finvosmart the invoice compares the place of supply with your state: the same state gets CGST + SGST, another state gets IGST — and the right amounts flow into your GSTR-1. Want to check a figure quickly? Use our free GST calculator.
Ready for GST 2.0 rates
Since 22 September 2025, most goods and services fall into three slabs — 5%, 18% and 40% — with 0% for exempt items, and special rates such as 3% on gold and jewellery. Because rates live on each item, moving an item to its new slab is a one-time change, and every new invoice picks it up automatically.
How it works
Set up your business
Add your GSTIN, address and invoice series, and pick a template for your invoices.
Add customers and items
Save customers with their GSTIN and items with HSN/SAC codes and GST rates.
Raise the invoice
Pick a customer and items — tax, totals and the CGST/SGST or IGST split are calculated for you.
Send, get paid, file
Send it by email or WhatsApp with a pay link, record the payment when it arrives, and upload GSTR-1 and GSTR-3B at month end.
Frequently asked questions
Are Finvosmart invoices GST-compliant?
Yes. Every invoice includes the details required by Rule 46 of the CGST Rules — your GSTIN, a consecutive invoice number, the customer's details, place of supply, HSN/SAC codes, taxable value and the CGST, SGST or IGST amounts.
Does Finvosmart support the new GST 2.0 rates?
Yes. GST rates are set on each item, so you can use the 0%, 5%, 18% and 40% slabs introduced on 22 September 2025, as well as special rates like 3% on gold. Update an item once and every new invoice uses the new rate.
Can I generate e-invoices and e-way bills?
Not from Finvosmart yet — direct IRN and e-way bill generation is being built. Today, generate them on the government portals and record the e-way bill number on the invoice, where it prints. Every Finvosmart invoice already carries the details the IRP needs.
Can I send invoices on WhatsApp?
Yes, once a WhatsApp Business account (Meta Cloud API) is connected with approved message templates. Finvosmart then sends each invoice’s number, amount and due date to your customer, and payment reminders with a pay link. You can always download the PDF and share it yourself.
Can I customise my invoice format?
Yes. Start from one of six preset templates and set its colour, a note under the heading, footer terms, and whether your bank and UPI details and a signature line print. Invoices, quotations, proforma invoices, delivery challans and credit notes can each have their own default template.
How much does it cost?
Plans start at ₹3,999 per month billed annually (₹4,999 billed monthly), with a 7-day free trial and no credit card required.
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