Most Indian businesses do not start by looking for “accounting software” — they look for billing software. They need to raise a correct GST invoice quickly, print or share it, and get paid. The accounting matters, but the daily reality is the counter and the invoice. So the right question is: which billing tool is fast, gets GST right every time, and does not leave your books a mess at month-end?
This guide covers the criteria that genuinely separate good GST billing software from a pretty invoice maker, so you can judge any option — including LekhaPro — on how it actually fits your business.
Correct GST on every invoice — non-negotiable
The first job of GST billing software is to compute tax correctly without you thinking about it. Intra-state supplies split into CGST and SGST; inter-state supplies become IGST — and the place-of-supply rules, not just your registration state, decide which applies. Cheap billing apps quietly get this wrong, and a wrong invoice means a wrong GSTR-1.
Check that the tool handles HSN/SAC-driven rates, tax-inclusive and tax-exclusive pricing, GST-law rounding, reverse charge, and cess where relevant. Ask to see a sample inter-state invoice before you buy.
Speed at the point of billing
For a shop or counter, billing speed is the whole game. Look for barcode scan-to-add, 80mm thermal receipt printing, and multi-series numbering so each book has a clean sequence. For a service or B2B business, look for quotation, proforma and sales-order documents that convert into a tax invoice without re-keying.
Sharing matters too: a UPI pay-by-QR printed on the invoice and one-tap WhatsApp or email sharing shorten the gap between billing and getting paid.
E-invoice (IRN) and e-way bill
If your turnover crosses the e-invoicing threshold, the software must generate IRNs; if you move goods, it must produce e-way bills. Be clear on how this happens: some tools file directly through a GST Suvidha Provider (GSP), others export JSON you upload yourself. Both are legitimate — just know which you are buying, and whether your own GSP credentials are required.
Billing that connects to real books
This is where most billing apps fall short. An invoice maker gives you a sales list; it does not give you a trial balance, a profit and loss statement, or a GSTR-3B you can trust. The better pattern is billing that posts every invoice straight into a real double-entry general ledger, so your billing and your accounts are the same data — not two systems you reconcile by hand later.
If you ever plan to hand clean books to a CA or file income tax from the same records, insist on this connection rather than a flat list of bills.
Offline vs cloud, and owning your data
A billing tool that stops when the internet drops is a liability at a busy counter. Offline-first software keeps billing working regardless of connectivity and keeps your data on your own machine; the trade-off is that you own your backups. Cloud tools are convenient for distributed teams but assume reliable connectivity and store your books on someone else’s servers. Decide deliberately based on where and how you bill.
A practical billing-software checklist
- Correct CGST/SGST vs IGST from place of supply, with HSN/SAC rates and rounding.
- Barcode + 80mm thermal POS for counters; quote→order→invoice for B2B and services.
- Multi-series numbering, UPI pay-by-QR, and WhatsApp/email sharing.
- E-invoice (IRN) and e-way bill — know whether it is direct (GSP) or export-and-upload.
- Billing that posts to a real double-entry ledger, not just a sales report.
- Offline capability and easy data export so you are never locked in.
- Flat, predictable pricing rather than per-seat or per-feature surcharges.
Where LekhaPro fits
LekhaPro is offline-first GST billing software where every invoice posts to a posted double-entry ledger. It bills on 80mm thermal with barcode, supports multi-series numbering, UPI pay-by-QR and WhatsApp/email sharing, and handles e-invoice (IRN) and e-way bill through your own GSP (or as offline JSON without one). GST returns — GSTR-1, GSTR-3B and 2B reconciliation — build on the same books. Plans are flat: Basic ₹249, Pro ₹449 and Enterprise ₹2,499 per month, with the full offline core in every plan.
Whether or not LekhaPro is your pick, use the checklist above: the best GST billing software is the one that bills fast, gets the tax right, and leaves your books correct by construction.