If you are comparing mark gst software, start with the four questions that actually predict whether you will still be using it in a year. They are below — along with a free plan to test them against.
What mark gst software is expected to cover
The phrase covers more ground than it looks. Some people searching it want counter billing. Some want return filing. Some want reconciliation of purchases against GSTR-2B. Some want the whole ledger.
Those are genuinely different products, and buying the wrong shape is the most common expensive mistake. A filing tool will not help you bill faster. A billing tool will not file your return for you — but it will produce the numbers that filing needs, correctly, which is where most of the work actually is.
Billixo sits on the billing side of that line and covers everything downstream of it: invoices, inventory, payments, receivables, and the GST summaries your return is prepared from.
What you get with Billixo
- GST invoicing with the full Rule 46 field set and the tax split derived from place of supply.
- Inventory that moves as you bill, with low-stock warnings.
- Customers and suppliers with GSTIN, state and defaults held once and reused.
- Payments and receivables — part payments, ageing, and written reminders.
- GSTR-1 and GSTR-3B summaries exported in formats a practitioner can open.
- AI bill scanning — a photograph of a supplier bill becomes a draft purchase record.
- AI HSN/SAC lookup from a plain-language description.
- Recurring invoices for anything billed on the same day each month.
- Proforma invoices and quotations in the same numbering discipline.
- WhatsApp and email delivery of the invoice from the screen you raised it on.
- Bulk import and export — CSV and Excel in; CSV, Excel and JSON out.
- Team logins on the paid plans, each with their own credentials.
How to evaluate mark gst software in one afternoon
- Open a free account and enter your own business details — the real GSTIN and state, not sample data.
- Add two customers: one in your state, one in another. This is the test that catches bad tax logic.
- Add three products with their real HSN codes and rates.
- Raise an invoice to each customer and look at the tax split. One should be CGST + SGST, the other IGST, without you selecting anything.
- Download the PDF and read it as your customer would. Is every mandatory field there?
- Export the GST summary and open it. If it needs repair before an accountant could use it, stop there.
- Export your customers and products. If that is awkward, you have learned the most important thing about the software.
Total cost, not sticker price
Software costs money in four places, and only one of them is on the pricing page: the licence, the time to set it up, the time it takes per invoice forever after, and the cost of the errors it lets through.
The fourth is the one that dominates and the one nobody estimates. An invoice with the wrong tax split costs a credit note, a reissue, possibly an amended return, and a phone call with a customer about their missing input credit.
Judged that way, software that derives the tax rather than asking for it is cheaper at any sticker price — and the sticker price here starts at zero.
Data ownership and the exit test
Ask, before you commit: how do I get everything out, and in what format? The answer tells you more about a vendor than any feature list.
Here it is CSV, Excel and JSON, covering customers, products, invoices and payments, available on every plan including the free one. Not because it wins comparisons, but because software you cannot leave is software with no incentive to keep being good.
Reverse charge, exports and the supplies that behave differently
Not every supply is a straightforward taxable sale. Some notified supplies put the tax liability on the recipient rather than the supplier. Exports and supplies to an SEZ can be made under a bond or LUT without payment of tax, or with tax and a refund claimed afterwards. Composition dealers cannot charge tax at all and must say so on the bill.
Each of these changes what the invoice has to say — the reverse charge marking, the LUT reference, the "composition taxable person" declaration. They are not exotic cases; most businesses hit at least one.
The fields are on the invoice in Billixo whether or not you use them, so the day you need one you are not looking for a workaround.
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.
Bill scanning, in practice
The single largest time cost in most small businesses is not raising invoices — it is entering purchases. A photograph of a supplier bill goes in and a structured draft comes out: supplier, GSTIN, line items, rates, tax split and total.
You check it. That is the workflow, and it is deliberate: an extraction you did not read is a liability, not a saving. But checking a filled form takes fifteen seconds and typing one takes three minutes, and that difference compounds over a month of purchases.
Who it is built for
Small and mid-sized Indian businesses that are registered under GST and bill regularly. One person doing everything, or a counter with three people billing at once and an accountant who needs the month to close cleanly.
The design assumption throughout is that whoever raises the invoice is busy and is not a tax specialist. So the tax is computed rather than asked for, the compliance fields are populated rather than presented as questions, and the report the accountant wants is a download rather than a request.
Try it free — the free plan needs no card and does not expire.
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.
Reliability, backups and getting your data out
Cloud billing software is only as good as its worst day. Two things matter more than any feature list: that your data is backed up somewhere you can reach, and that you can export it in a format something else can read.
Exports here are CSV, Excel and JSON, on every plan including the free one, covering customers, products, invoices and payments. That is the honest test of whether software respects you — not what it promises, but what it lets you take when you leave.
Frequently asked questions
Can several people use it at once?
On the paid plans, yes — separate logins per team member. The Free plan is one login.
What is the best mark gst software for a small business?
The one that derives the tax correctly, exports a return summary your accountant can use, and does not price you out as you grow. Rather than take a list’s word for it, test two or three against your own invoices for a week — the free plan here exists so that test costs nothing.
Is there genuinely free mark gst software?
Yes. Billixo has a Free plan at ₹0 with no card and no expiry, carrying volume limits and a watermark on the PDF. It produces real, compliant GST invoices — it is a plan, not a countdown.
Do I need to install anything?
No. It runs in a browser, on a laptop, desktop or phone, so there is nothing to install, nothing to update and nothing tied to one machine. If the office computer dies, you sign in from another one and everything is there.
Are the invoices valid for GST?
Yes. Every invoice carries the fields Rule 46 requires — GSTIN, HSN/SAC on each line, place of supply, the correct CGST/SGST or IGST split, and a consecutive invoice series that restarts each financial year.
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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