How to choose GST billing software for your shop

Most billing software comparisons list features. Features are not where people get hurt. What actually goes wrong is discovered months later — the shop can't bill because the broadband is down, or the price triples at renewal, or the data turns out to be very hard to get back out. This guide is about those things.

1. Does it work when the internet doesn't?

This is the first question, and for a shop counter it is close to decisive. Cloud-only billing software stops entirely when the connection drops — and connections drop during power cuts, during outages, and at exactly the wrong moment on a busy evening. If your billing lives in a browser tab, your ability to take money depends on your ISP.

Ask specifically: can I raise and print a bill with the internet unplugged? Some vendors answer "we have offline mode" when they mean the app opens but cannot complete a sale. Test it on the trial. Unplug the router and try to bill.

2. Whose data is it, really?

Your billing history is your business record — you need it for filing, for disputes, and for knowing what sells. Two questions matter: can you export all of it, in a format something else can read, without asking anyone's permission? And if you stop paying, do you still have it?

Some cloud vendors give you read-only access after cancellation, some give you a limited window to export, and some make it deliberately awkward. Software that stores data locally on your own machine sidesteps this entirely, but then backups become your responsibility — which is a fair trade only if you actually take them.

3. Is the invoice actually compliant?

A surprising amount of cheap billing software produces invoices that are not fully GST-compliant. Check that any software you're considering handles all of these correctly:

• Your GSTIN and the customer's, printed on the invoice.
• HSN or SAC codes per item — not one code applied to everything.
• The correct split: CGST and SGST within your state, IGST across state lines, chosen automatically from the customer's state rather than by you remembering.
• Sequential invoice numbering with no gaps, and a proper handling of cancellations rather than deleting a bill and reusing the number.
• Tax shown per rate slab where a bill has items at different rates.
• Reports you can hand to your accountant, or export for filing, without re-typing.

The practical test: raise a sample bill on the trial with two items at different GST rates, one customer in your state and one outside, and look hard at what prints. If it gets that right, it will probably get the rest right.

4. What does year two cost?

Introductory pricing is standard and there is nothing wrong with it — but you should know the real number before you migrate your whole shop onto something. Ask directly:

• What is the renewal price, not the first-year price?
• Is it per user or per counter, and what happens when I add a second terminal?
• Is support included, or is it a separate plan?
• Are updates included, or does a new version mean buying again?
• Is there a limit on bills or items per month, and what happens if I exceed it?

Features that matter more than they sound

• Barcode scanning. If you have more than a few dozen products, typing item names is the slowest part of your day.
• IMEI or serial tracking, for mobile and electronics shops. Being able to find which bill a handset went out on settles warranty disputes instantly.
• Fast reprints. Customers lose bills constantly. Finding one by phone number in seconds is worth more than most headline features.
• Keyboard-driven billing. At a busy counter, reaching for a mouse for every item costs real time. Good billing software can be driven entirely from the keyboard.
• One-click backup. Whatever the software, the shops that survive a hard-disk failure are the ones that took backups. Make sure it is one action, not a procedure.

Features that sound better than they are

Mobile apps for billing sound useful and are rarely used at a real counter — a phone screen is slower than a keyboard. Elaborate analytics dashboards look impressive in a demo; most shopkeepers need daily sales, GST collected, and what's selling, and nothing more. And AI features in billing software are, at the time of writing, largely decorative. Don't pay extra for them.

A sensible way to choose

1. 1Shortlist three, including at least one offline/installable option and one cloud one.
2. 2Take the trial and bill for one full day on each, with your real products and real customers.
3. 3During the trial, unplug the internet and try to complete a sale.
4. 4Export your data from each one and open the file. If you can't, that is your answer.
5. 5Ask each vendor the year-two price in writing.
6. 6Choose the one that was fastest at the counter and honest about the second question.

For transparency: we build BillPro, which is offline, installable, and keeps your data on your own PC. That design suits a shop counter, and it is genuinely not the right choice for everyone — a business with several branches that needs one shared view across all of them is better served by a cloud product. Use the tests above rather than taking anyone's word for it, ours included.