GST Software for Professional from a practice point of view — what to insist on in a client’s billing system, and what genuinely reduces the hours you spend per client per month.
Practice software and client billing are different purchases
Practice software handles many GSTINs, bulk filing, client management and deadlines. It is bought by the practice, and it is not what this page is about.
Client billing software produces the data you file from. It is bought by the business, and it decides how much of your month is spent repairing rather than reviewing.
Buying more practice software does not fix a client whose invoices never carried an HSN. Only the client’s billing system can fix that, which is why what they use is your problem too.
What Billixo gives you as the client’s accountant
- Mandatory fields captured at source — GSTIN, place of supply, HSN on every line, correct tax split.
- A consecutive invoice series issued centrally and restarting each financial year, so gaps and duplicates do not happen.
- GSTR-1 and GSTR-3B summaries that reconcile to what was billed.
- Exports in CSV, Excel and JSON that open without repair.
- Credit and debit notes that reference the original invoice properly.
- A purchase register that keeps the supplier’s own invoice number and date, which is what 2B matching depends on.
- A free plan for the client at ₹0 — so recommending it costs them nothing and removes your objection about client budget.
Putting a client on it
- Have them open a free account — ₹0, no card, so there is nothing to approve.
- Set up the business details yourself if it is quicker: GSTIN, state, registration type.
- Import their party and item lists from whatever they have in Excel.
- Set the HSN codes properly once. This is the twenty minutes that saves you an hour every month afterwards.
- Agree a cut-off date and let them bill from it.
- Take the GSTR-1 export at month end and compare it to what you would have assembled by hand. That comparison is the whole business case.
The handover, and why a file beats a login
Some products offer accountants a login into the client’s account. That is occasionally useful and usually not what you want — you work in your own tools, across many clients, and a login per client is a burden rather than a service.
A clean export is better: GSTR-1 and GSTR-3B summaries, a purchase register, and CSV or Excel of the underlying documents. It fits your workflow instead of asking you to adopt theirs.
What to insist on, whatever they choose
If a client will not move, these are worth insisting on in whatever they already use: GSTIN mandatory on B2B parties; place of supply set on the party rather than the voucher; HSN on every item master; one person responsible for the invoice series; purchases entered with the supplier’s exact invoice number and date.
Those five habits remove most of the month-end repair regardless of the software. The advantage of a system that enforces them is only that it does not depend on anyone remembering.
HSN and SAC codes, and how many digits you need
Every line on a tax invoice needs an HSN code for goods or a SAC for services. How many digits depends on your aggregate turnover in the preceding financial year — smaller businesses report fewer digits than larger ones, and B2B and B2C invoices are treated differently.
Because the requirement is tied to turnover and has been tightened in stages, the practical answer is to store the fullest code you can against each product once, and let the software report at the level required. A six-digit code can always be truncated; a two-digit one cannot be expanded.
Billixo keeps the code on the product record and carries it onto every line automatically, and its AI HSN lookup will suggest one from a plain description when you genuinely do not know.
Invoice numbering: one unbroken series per year
The invoice number has to be consecutive, unique within the financial year, and no more than sixteen characters of letters, numbers, slashes and hyphens. Gaps invite questions. Duplicates cause them.
This is the single most common reason a spreadsheet-based billing setup fails an audit: two people billing on two machines, both starting from the last number they remember. A system that issues the number centrally cannot make that mistake.
The series restarts on 1 April, and Billixo restarts it for you rather than waiting to be told.
Who this actually suits
It fits a business that raises between a handful and a few hundred invoices a month and would rather not think about GST between the 10th and the 20th: traders, distributors, retail counters, workshops, agencies, consultants, contractors and manufacturers who sell on invoice.
It fits less well if you need deep manufacturing costing, multi-currency consolidation, or payroll — those are different products, and pretending otherwise wastes your evaluation time.
If you are not sure which side of that line you fall on, the free plan answers it in an afternoon at no cost. Start free now.
Free, and what it costs you instead
Free software usually costs you something that is not money: your data held hostage, an export that does not work, ads inside your invoice, or a "free" tier so narrow it is a demo with a login screen.
The line here is drawn differently. Export works on the free plan — CSV, Excel and JSON — because data you cannot get out is not data you own. The invoice is a real compliant invoice, not a sample. The limits are on volume and on the conveniences, not on whether the thing works.
Start free now. If it does not suit you, take your data with you.
Where your data lives
On the server this platform is installed on. Every record carries a company identifier and every query is scoped to the signed-in account at the framework level, so one business cannot read another’s data by any route, including a crafted one.
Sign-in is rate limited, sessions can be restricted to one device per user, and passwords are stored hashed. Exports are available on every plan, free included: if you ever want to leave, your data leaves with you.
Frequently asked questions
What if the client already uses something else?
Then the useful conversation is about five habits rather than a migration: mandatory GSTIN on B2B parties, place of supply on the party master, HSN on every item, one owner of the invoice series, and purchases entered with the supplier’s exact invoice number and date.
Is this software for my practice or for my clients?
For your clients. It is billing software, not practice management or bulk filing software. What it does for you is produce data that does not need reconstructing.
Does it file returns?
No. It prepares GSTR-1 and GSTR-3B summaries and exports them. Filing stays with you or the client, which is where the responsibility sits.
What happens to my data if I stop paying?
Nothing is deleted. The account settles back onto the Free plan: the paid conveniences switch off, the volume limits return, and every invoice, customer and product you created stays exactly where it is — including the export.
Does it work on a phone?
Yes. It is a browser application that adapts to the screen, so the same account works from a desktop at the counter and a phone in the market. There is no separate app to keep in step.
Start free, decide later
You do not have to choose a plan to begin. Start on Free, use it for as long as it suits you, and upgrade only when a limit actually gets in your way — never automatically, and never because a countdown ran out.
Open the software demo → — or create the free account from the same page.
Read the full details → on the home page, including pricing and the AI features.
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