Best 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.
What a GST invoice legally has to carry
Rule 46 of the CGST Rules sets out what a tax invoice must show, and it is a longer list than most invoice templates carry. Getting one field wrong does not usually cost you anything the day you raise it — it costs your customer their input credit months later, which is a harder conversation.
The fields are:
- Your name, address and GSTIN
- A consecutive invoice number, unique within the financial year
- The date of issue
- The customer's name, address and GSTIN where they are registered
- Place of supply, and the state code, for inter-state supplies
- HSN or SAC against every line
- Description, quantity, unit, rate and taxable value per line
- Rate and amount of CGST, SGST/UTGST, IGST and cess, shown separately
- Whether tax is payable on reverse charge
- Signature or digital signature of the supplier or an authorised person
Billixo fills these in from the customer and product records rather than asking you to remember them, which is the only reliable way a busy counter gets them all right every time.
CGST, SGST and IGST — worked out, not chosen
Whether a sale attracts CGST and SGST or IGST is not a preference. It follows from the place of supply: same state as your registration means the tax splits into central and state halves, a different state means one integrated tax at the combined rate.
That sounds simple and goes wrong constantly, because it is a dropdown in most billing software and a dropdown is something a tired person clicks past. In Billixo the split is derived from the state on the customer record against the state on your registration, and it changes the moment either does.
The consequence of getting it wrong is real: an IGST invoice raised as CGST/SGST has to be credited and reissued, and if the return has already gone in, amended.
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.
What "free" means here, exactly
The Free plan costs nothing, needs no card, and has no expiry date. It is not a trial that turns into a bill; it is a plan you can run a small business on indefinitely.
What it gives you:
- Real GST invoices with the full Rule 46 field set
- Customers and products, with HSN/SAC held against each
- A daily and monthly invoice allowance, generous enough for a small operation
- One login
- Export of your own data, whenever you want it
What it does not give you:
- A watermark-free PDF
- GSTR-1 and GSTR-3B export
- The AI features — bill scanning, HSN lookup, the assistant
- Extra team logins, bulk import, recurring invoices and reminders
Every new account also gets the full paid feature set for its first 14 days, so you can see what the ceiling looks like before deciding whether you need it. When that ends nothing is charged and nothing is deleted — the account simply settles onto Free.
Start free now — it takes an email address and about a minute.
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
Can I get the data in a format I can use?
CSV, Excel and JSON, covering customers, products, invoices and payments, plus the GST return summaries. Export works on every plan including the free one.
Can I set the client up myself?
Yes, and it is usually faster. Twenty minutes on business details, party and item masters and HSN codes removes most of the recurring monthly work.
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.
Will my accountant be able to work with it?
That is what the GSTR-1 and GSTR-3B summaries are for. They export in formats a practitioner can open and reconcile without repairing the file first — which, in practice, is most of what a CA wants from a client’s billing software.
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.
Try it — the demo is the product
There is no sales call and no scheduled demo, because a recorded walkthrough of somebody else’s data tells you nothing about your own. Open an account instead and raise a real invoice for a real customer; it takes about a minute and costs nothing.
Open the software demo → — sign in, or create a free account from the same screen.
See full details on the home page → — features, the AI, pricing and the answers to the usual questions.
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