GST billing software that also files your returns
Busy is GST billing, inventory and accounting software built for Indian businesses: compliant invoices, e-invoicing and e-way bills, GSTR-1 and 3B from your own vouchers, and 2A/2B reconciliation so you never lose input credit. Supplied and supported by Mark Software, Pune.
Billing is the easy part. Compliance is where software earns its money
Almost any application can print a bill. The reason Indian businesses buy proper GST billing software is what happens in the twenty days after the bill: HSN summaries that must add up, tax rates that must match the item master, e-invoices that must carry a valid IRN, e-way bills for goods above the threshold, GSTR-1 that must reconcile with your books, and GSTR-2B that must be matched against purchases so credit is not silently lost.
Busy handles that entire chain from one voucher entry. Your operator bills as usual; the compliance artefacts are produced from the same data rather than re-keyed into a portal or an Excel template at month-end. That single design decision removes most of the errors that lead to notices.
What the GST module covers
B2B, B2C, export, SEZ, bill of supply, RCM and credit/debit notes with correct place of supply.
Generate IRN and QR directly from the sales voucher; cancel and regenerate without portal gymnastics.
Part-A and Part-B data pushed from the invoice, with transporter and vehicle details tracked.
Return-ready summaries built from vouchers, with pre-filing validation of GSTIN and HSN data.
Automatic reconciliation against your purchase register, with mismatch and missing-invoice lists.
Statutory deductions handled inside the voucher, not as a spreadsheet afterthought.
GST billing is worthless if the stock is wrong
A GST return is only as accurate as the inventory behind it. This is where cheap billing apps quietly fail: they print a compliant invoice while the stock ledger drifts, and by March nobody can explain the difference between the books and the godown.
Busy ties billing to real inventory — godown-wise stock, batch and expiry tracking, serial numbers, alternate units of measure, size and colour matrices, and re-order levels. Every invoice moves stock in the right godown at the right valuation, so stock statements, item-wise profitability and GST returns all derive from one consistent set of numbers.
For distributors, the discount and scheme engine matters just as much: party-wise price lists, quantity slabs, free-goods offers and credit-limit blocking at the moment of billing. These are the entries that otherwise get done on a calculator and then argued about later.
Who this GST software suits best
Traders and wholesalers billing dozens of invoices a day with party-specific rates. Distributors running schemes, free quantity and secondary sales. Retailers needing barcode POS at the counter and GST returns at the back. Pharma and food businessesthat legally must track batch and expiry. Manufacturers issuing job work and consuming raw material against a BOM. CA and tax firms managing dozens of client companies on one licence, because Busy licences by user rather than by company.
If you are a single-person service business raising four invoices a month, honestly, you do not need this — a simple invoice tool will do. Software this capable pays for itself when volume, stock or compliance complexity is real.
The month-end that stops being a crisis
Here is the practical change customers describe. Before: the accountant spends the first week of every month exporting sales to Excel, fixing HSN codes, chasing missing purchase bills, manually comparing GSTR-2B line by line, and filing at 11pm on the deadline.
After: the return summary is already there on the 2nd, the mismatch report names the four suppliers whose invoices are missing, WhatsApp reminders go out the same morning, and filing happens on the 8th during office hours. Nothing dramatic — the work simply moves from reconstruction to review.
Add Busy on Cloud and your CA does that review from their own office without a pen drive. Add Busy Magic and the AI copilot answers "why is 3B different from my sales register?" in plain language instead of sending someone hunting through vouchers.
Getting started with GST billing software in Pune
Mark Software (Elitemark Software Pvt Ltd) is an authorized Busy partner based in Pune. We do the whole journey: a free demo on your own invoices, an edition recommendation with written pricing, licence supply and activation, data migration from Tally, Marg or Excel, invoice format recreation, GST configuration for your business type, staff training, and support through your first return filing.
Pricing starts at ₹11,000 per user for Busy Basic, ₹16,500 for Standard (the edition most GST-registered traders should buy, because it includes e-invoicing, e-way bill and return generation) and ₹22,000 for Enterprise. Yearly subscription plans start at ₹5,000 per user. All prices exclude 18% GST, which registered businesses claim back.
The fastest way to know whether this fits is to watch your own worst invoice being billed in it. That demo is free, takes about 45 minutes, and comes with no obligation whatsoever.
Frequently asked questions
What is the best GST billing software for small business in India?+
For most Indian small businesses the practical shortlist is Busy Software, Tally and Marg. Busy Software is the strongest fit when you need GST invoicing plus real inventory — multi-godown stock, batches, schemes and item-wise profit — with GSTR-1, GSTR-3B and 2A/2B reconciliation generated inside the software. Mark Software in Pune supplies, installs and supports it from ₹11,000 per user.
Does Busy GST billing software generate e-invoices and e-way bills?+
Yes. From the Standard edition onwards Busy generates e-invoices (IRN and QR code) and e-way bills directly from the sales voucher, so your billing operator never opens the government portal separately.
Can I file GSTR-1 and GSTR-3B from the software?+
Yes. Busy prepares GSTR-1 and GSTR-3B from your vouchers, flags mismatched HSN or GSTIN data before filing, and reconciles GSTR-2A/2B against your purchase register so input credit is not lost.
Is GST billing software mandatory for my business?+
Software is not legally mandatory, but e-invoicing is compulsory above the notified turnover threshold, and correct HSN-wise reporting is required for most registered businesses. Doing that reliably by hand becomes impractical past a few invoices a day, which is why almost every registered trader now bills from software.
Can the invoice look exactly like my current bill format?+
Yes. Mark Software recreates your existing invoice format — logo, terms, HSN column layout, multiple copies, regional language fields — so customers and your team see no visual change on day one.
Does it work offline, or do I need internet?+
Desktop Busy works fully offline for billing and accounting; internet is only needed for e-invoice, e-way bill and GST portal actions. If you want anywhere access, Busy on Cloud hosts the same software online.
I searched for "Bsuy GST software" — is that this?+
Yes. "Bsuy" is a common misspelling of Busy, so Bsuy GST software refers to Busy GST billing and accounting software described on this page, supplied in Pune by Mark Software (Elitemark Software Pvt Ltd).
Get a free demo of GST Billing Software
Share a few details and our Busy Software specialists at Mark Software (Elitemark Software Pvt Ltd, Pune) will call you back the same working day with pricing, a demo slot on your own data, and answers specific to your business.
- Demo tailored to your billing, GST and inventory needs
- Genuine licences with GST invoice from an authorised partner
- Installation, migration from Tally and staff training included
- Local Pune & Maharashtra support with fast response
See your own GST invoice billed live
Free demo of Busy GST billing software — online across India or onsite anywhere in Pune and PCMC.