GST billing & accounting · India
Bill the customer in front of you with KVN Billing
No signal in the shop. No signal in the godown. It does not matter — KVN Billing writes the invoice to your phone, not to somebody’s server. GST splits itself, stock moves, the ledger posts. When the network comes back, it all syncs. Your customer never waited.
And after the customer leaves, ask the phone — "BSV outstanding?" The AI assistant answers from your own books, in English or Tamil, and drafts the WhatsApp reminder for your yes.
Rs. 499 / Yearly * GST applicable
Built for the Indian counter
The bill cannot wait for the network
Most billing apps are cloud-only. One bar of signal and the save button spins while your customer stands there with cash in hand. We put the database on the phone instead. Everything — the invoice, the GST split, the stock, the ledger — happens on the device in the time it takes to press Save. The cloud is where the copy goes afterwards, not where the work happens.
Features
Built from watching people bill
Every one of these came from a real problem at a real counter — not from a competitor’s feature list.
Offline GST invoicing
Put the phone in aeroplane mode and raise a full tax invoice. The number comes from your own series, kept on the device, so it never skips and never repeats. Sync pushes it up whenever signal returns.
Nine document formats
A credit note is not an invoice with the heading swapped, and we do not print it that way. Tax invoice, credit and debit notes under Section 34, purchase bill, quotation, proforma, challan, purchase order and receipt — nine documents, nine correct layouts.
Double-entry accounting
Not a summary that looks like accounts. Every invoice, payment and expense posts a real double-entry. Trial balance, P&L and balance sheet come out on demand, and they tally — hand them to your CA without an apology.
OCR scan to bill
Photograph the supplier’s bill. The app reads the name, GSTIN, bill number, date and amounts, then offers to match them to suppliers and items you already have. Nothing saves until you have checked it — it reads the bill, you approve it.
Barcode generator & scanner
Loose items with no barcode? Generate one and print it as a sticker in any of five label sizes. The scanner holds a read for a full second before accepting it, so a half-caught number never lands in a bill.
GSTR-1 & GSTR-3B
The workbook is built from bills you already raised — B2B and B2C split the way the return wants them, HSN totalled, input credit worked out. Upload it yourself or send it to your accountant. No re-typing anything into a spreadsheet.
Stock & inventory
Stock moves when the bill saves, not when you remember to update it. Closing quantity and value per item, and a warning when something drops below the level you set — before the customer asks for it and you have none.
WhatsApp & email
Most customers want the bill on WhatsApp. Send the PDF from the document screen in two taps, or email it, or print it — same file, whichever they ask for. Overdue? Chase it from the invoice itself with a one-tap payment reminder.
Ask your books
An AI assistant that answers in plain words — "BSV outstanding?", "last month sales?", "make last month GST Excel" — in English or Tamil. It sends invoices and payment reminders on WhatsApp, but only ever after you reply yes. Nothing leaves the phone without your word.
Parallel voucher series
GST invoices, estimates and counter slips, each with its own unbroken run of numbers — the way Busy shops already work. Switching books is one tap on the invoice, and a Busy import continues every series where it left off.
Non-GST books
Mark a series non-GST and its bills carry no tax and never touch GSTR-1, the GST summaries or any GST file. Estimates and exempt trade stay exactly where they belong: in the accounts, out of the returns.
Automatic e-way bill filing
One tap on the invoice files the bill — transporter, vehicle and distance carried across, the issued number saved back on the document. A portal-shaped print follows from the live record. Prefer the portal yourself? The validated JSON is still one tap away.
Automatic e-invoice (IRN)
One tap files the e-invoice from a tax invoice, prints the signed QR on the bill, and cancels within the 24-hour window — with the e-way bill filed in the same tap when vehicle details ride along.
One parties list
Customers and suppliers share a single screen, and every picker searches the whole book — a trader who both buys and sells shows up on sales, purchases, receipts and payments alike, badged by what each entry is.
Invoice lines that collapse
Each added item rests as one readable row — name, quantity × rate, amount — so a ten-item bill reads as a list. Tap any row to open its editor; the header counts what is on the bill.
GSTIN verify & auto-fill
Type the GSTIN once. Registered trade name, address and state come back and fill themselves in. The check digit is verified before we even ask, so a mistyped number is caught at the counter — not by your customer’s accountant three weeks later.
Google & mobile OTP sign-in
One tap with the Google account already on the phone, or an OTP to your mobile number. Username and password still work if you prefer them. Nobody should need a new password to open their own books.
Encrypted backups
The file is encrypted on your phone before it goes anywhere, so what sits on our server is something we cannot open. Logo and signature travel inside it — restore on a new phone and your invoices look exactly as they did.
Financial year switching
Switch to last year and every report follows. Balance-sheet accounts carry forward, income accounts start fresh — the way the year is actually supposed to close, without a migration or a second file.
Multi-company & users
Two firms on one phone, with nothing shared between them — separate books, separate numbering, separate letterhead. Give staff a login that bills but cannot open the accounts or raise a credit note.
A4, A5 & 4-inch thermal
A4 for the file and the email, A5 for a compact GST invoice, 4-inch thermal for the counter roll. Each is drawn for its own paper, not shrunk to fit. You are asked before every preview, with your usual size already picked — and your first sales invoice asks for the bank account, so the payment block is never blank on a customer’s copy.
AI assistant
Ask the phone, not the accountant
A chat window inside the app that reads your own books and answers in plain words — English or Tamil. No account to create, no website to open, no data leaving the phone to think with.
A real exchange, from your own books
Roadmap
Not built yet. Saying so.
Three things people ask for that we do not have. They are on this page because you should know what is missing before you pay, not after. Everything above this line is in the app today.
Scheduled payment chasing
One-tap reminders are already in the app — from the invoice, or by asking the assistant. What is left is the schedule: overdue bills chasing themselves on WhatsApp and SMS while you sleep, stopping the moment a payment lands.
Web access with real-time sync
The same books on a shop laptop, a home desktop and the counter phone at once. Raise a bill downstairs and it is on the office screen before you have put the phone down.
One-click payment links
Send a link with the bill. The customer pays by UPI, card or net banking, and the receipt posts itself against that invoice when the money lands — no matching payments by hand at the end of the week.
No dates, deliberately. A dated roadmap is a promise and a missed date is a broken one. Ring us and ask where any of these stands — you will get a straight answer, including “we have not started” if that is the truth.
At the counter
Start to paid without leaving the screen
Getting started
Billing on the same day you call us
Tell us about your business
Your trade, how you bill today, and how many people need access.
We set your company up
Company details, GSTIN, invoice numbering series and financial year, configured before you start.
Add your items
Import or add products, generate barcodes for the ones without, and print the labels.
Raise your first bill
Correct from the very first invoice, because the setup was done first.
Who uses it
One billing app across trades
Data security
Your books stay yours
Pricing
One number. No asterisk.
No starter tier missing the GST returns. No jump in price the month you get busy. No per-invoice fee that quietly punishes a good quarter. One figure, every feature, for as long as you keep it.
Full plan
Rs. 499/ Yearly
* GST applicable
Covers one company, with every feature and as many staff logins as you need. Nothing is charged per invoice.
* GST applicable at the rate on the date of invoice, currently 18%.
A proper GST invoice is issued, so a registered business claims it
back as input credit.
Running a second firm? That is a separate set of books and a
separate Rs. 499 a year.
No document limit and no per-bill fee, ever.
Tax invoice, credit and debit notes, purchase bill, quotation, proforma, challan, purchase order and receipt.
Each drawn for its own paper, chosen per invoice.
Trial balance, profit and loss and balance sheet, on demand.
Built from the bills you have already raised.
File in one tap from the invoice, cancel inside the 24-hour window, extend validity when the lorry is still on the road — or export the validated JSON for the portal.
Filed from the tax invoice, cancellable within 24 hours.
Customer name and address fetched from the number.
AES-256, with the files in your own Downloads folder.
Five sticker designs, printed from the app.
Photograph a supplier bill instead of typing it.
Send the PDF straight from the document screen.
Decide who may raise a credit note or open the accounts.
Company, GSTIN and numbering configured before you start; updates for the life of the subscription.
FAQ
Common questions
Which is the best GST billing software for small business in India?
Can I create a GST invoice without an internet connection?
How much does KVN Billing cost?
Is KVN Billing free?
Does the billing app work on Android?
Can I file GSTR-1 and GSTR-3B from the app?
Does the app generate e-way bills?
Does the app file e-invoices (IRN)?
Can the app fill in a customer from their GSTIN?
What invoice sizes can it print?
What is still being built?
Can I ask the app about my business in plain words?
Can I scan a purchase bill instead of typing it?
What is mobile billing software?
Which accounting software is best for a small shop in India?
Start billing today
Get KVN Billing
We set up your company, GSTIN and invoice numbering before you start, so your very first GST invoice is correct.