Billing & Accounting
Onyx Bills
GST billing and accounting software (SaaS).
Online GST and VAT billing, double-entry accounting, inventory and e-Way Bills for small and growing businesses. From ₹600 a month, with a 14-day free trial.
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What it covers
Everything Onyx Bills takes care of
- GST and VAT sales and purchase invoices
- Quotations, proforma invoices, credit and debit notes
- e-Way Bills (India) and e-Invoicing ready
- Recurring and bulk invoice generation
- Payments, expenses and contra entries
- Built-in inventory with FIFO lots, barcodes and expiry tracking
- Double-entry accounts, ledgers and journal entries
- GSTR-1 and GSTR-3B summaries with HSN/SAC
- Profit & Loss, Balance Sheet, Trial Balance and ageing
- Bank reconciliation
- Roles, audit trail and login history
- Up to 3 companies on one subscription
- English, Thai and Vietnamese
- PDF and Excel export of every report
- Up to 3 companieson one subscription, one renewal date
- 14-day free trialno installation, works in any browser
- GST & VATIndia, Thailand and Vietnam
- PDF & Excelevery list and report exports
SaaS · Billing & accounting software
GST billing and accounting software that keeps your books balanced
Onyx Bills is online billing and accounting software (SaaS) for small and growing businesses. Create GST and VAT invoices, quotations, proforma invoices, credit and debit notes; record purchases, payments and expenses; track stock with FIFO lots and barcodes; and get double-entry books, GST reports, Profit & Loss and Balance Sheet without extra work. It runs in the browser at app.onyxbills.com, in English, Thai and Vietnamese.
All features
Everything from first quote to final balance sheet
Sell
Quote, invoice and collect, with the right tax chosen for you.
Sales invoices
Line discounts, tax-inclusive pricing, other charges, transport details and round-off, with status tracking from Draft to Paid.
Automatic GST type
CGST + SGST or IGST is picked from your state and the shipping state, so there is no manual switching.
Quotations to invoices
Send a quotation (estimate) with a validity date, track acceptance, then convert it to an invoice in one step.
Proforma invoices
Bill before goods ship, then convert the proforma to a tax invoice once payment is confirmed.
Credit notes
Issue against a posted invoice to reduce the balance and return tracked stock.
Bulk invoice generation
Bill one product or service to many customers at once, each with its own voucher number.
Recurring invoices
Schedule repeat invoices for rent, retainers, AMC and subscriptions.
e-Way Bills and e-Invoicing
Generate e-Way Bills in the billing flow for movement of goods; e-Invoicing ready.
Buy & pay
Record what you buy, what you owe and what you have paid.
Purchase invoices
Every received line creates a new FIFO stock lot, so costs follow the stock.
Debit notes
Return goods to a vendor, reduce what you owe and deduct stock in one entry.
Payments received and made
Cash, bank, cheque, UPI, card or online transfer, applied against outstanding bills.
Expenses
Office costs, utilities and other outgoings that are not tied to a purchase.
Contra entries
Move money between cash and bank accounts and between banks.
Customers and vendors
One contact list with groups, opening balances, credit limits and a running ledger.
Stock
Know what you have, what it cost and when it expires.
Products and services
Nested categories, product types, units of measure and unit conversions such as 1 Box = 10 Pcs.
Lot and batch tracking
FIFO lots draw down the oldest stock first, with a source trail for every lot.
Barcodes
Generate Code128, QR or EAN-13 barcodes and print them on sticker templates.
Near-expiry reports
See expired stock and what expires in 30, 60 or 90 days, so you sell the oldest first.
Valuation and reorder alerts
Stock value at cost and retail, plus low-stock and out-of-stock alerts against reorder levels.
Bulk CSV import
Bring in customers, vendors and products from a spreadsheet, with an import history.
Books & reports
Double-entry accounting that stays in step with every invoice and payment.
Chart of accounts
Seventeen ready-made account groups across assets, liabilities, income, expenses and equity.
Journal entries
Manual vouchers that only post when debit equals credit.
Profit & Loss and Day Book
A P&L that keeps tax out of revenue and cost, and every voucher in one chronological list.
Balance sheet and ageing
Trial balance, balance sheet, and receivables and payables ageing as of any date.
GST reports
GSTR-1 and GSTR-3B summaries with HSN/SAC and tax-slab breakdowns.
Bank reconciliation
Books against passbook balances, uncleared cheques and deposits, with detailed statements.
Control & setup
Decide who sees what, keep a record of every change, and make the paperwork yours.
Up to 3 companies
Create and switch between up to three companies (or branches kept on separate books) under one subscription.
Roles and menu access
Administrator, User and Accounts roles, with each menu shown or hidden per role.
Audit trail
Who created, changed, cancelled or deleted which voucher, with time, IP address and severity.
Login history
A log of every sign-in attempt against your company, successful or not.
Print layouts
A4, A5, A6 and 80 mm thermal paper, named copies such as Original for Recipient, with your logo and terms.
Numbering and financial years
Voucher prefixes and suffixes, numbering that resets yearly, and years you can close once final.
Three languages
Switch the interface between English, Thai (ไทย) and Vietnamese (Tiếng Việt).
GST & VAT
The right tax on every invoice
- INIndia · GST
In India, Onyx Bills picks CGST + SGST or IGST from your state and the shipping state, generates e-Way Bills, and gives GSTR-1 and GSTR-3B summaries with HSN/SAC and tax-slab breakdowns.
- TH · VNThailand & Vietnam · VAT
In Thailand and Vietnam it applies flat-rate VAT on invoices and purchases and keeps tax out of revenue and cost in the Profit & Loss.
Reports
The reports your accountant will ask for
Every list and report exports to PDF and Excel.
- Day Book
- Profit & Loss
- Balance Sheet
- Trial Balance
- Receivables & Payables Ageing
- GST Report (GSTR-1, GSTR-3B)
- Bank Reconciliation
- Itemized Sales
- Itemized Purchases
- Sales Performance
- Stock Valuation
- Near-Expiry Stock
- Stock Movement
- Audit Trail
Pricing
Simple plans in your own currency
Prices before applicable taxes. Annual billing is ten times the monthly price (2 months free). Every plan includes up to 3 companies and a 14-day free trial.
Onyx Bills
GST and VAT billing with double-entry accounting and an inventory module.
₹6,000/ year
About ₹500 a month
Start 14-day free trial of Onyx Bills (opens in a new tab)- Invoices, quotations, proforma, credit and debit notes
- GST & VAT sales and purchase invoicing
- e-Way Bills (India), e-Invoicing ready and built-in inventory
- Double-entry accounts and ledgers
- Customer and vendor management
- Recurring schedule
- Bulk invoice generation
- Financial reports and P&L statements
- Up to 3 companies under one subscription
- Reports management
Onyx Stock
Stock and manufacturing for plants that buy, assemble and sell.
₹7,000/ year
About ₹583 a month
Start 14-day free trial of Onyx Stock (opens in a new tab)- Standalone inventory and manufacturing control
- Stock in, stock out, opening stock
- Bill of materials (BOM) and manufacturing assembly
- Reorder level and stock alerts
- Direct master data management
- Approval workflow for masters and entries
- Reports management
- Best for manufacturing plants
Onyx Combo
Billing and manufacturing inventory together, with Combo Sync.
₹10,000/ year
About ₹833 a month
Saves ₹3,000 a year vs. buying both separately
Start 14-day free trial of Onyx Combo (opens in a new tab)- Everything in Onyx Bills and Onyx Stock
- Automated master data sync (Onyx Bills → Stock)
- Real-time manufacturing stock reverse sync
- Up to 3 companies under one subscription
- One team, one set of numbers
- Reports management
Prices as listed on onyxbills.com/pricing; that page always shows the latest prices.
What can I do with Onyx Bills?
Create sales and purchase invoices, quotations, proforma invoices, credit and debit notes, record payments and expenses, track stock, and run double-entry accounting reports such as Profit & Loss, Balance Sheet, Trial Balance and ageing.
How much does Onyx Bills cost?
In India, Onyx Bills costs ₹600 a month or ₹6,000 a year (about ₹500 a month), before applicable taxes. Annual billing is ten times the monthly price. There is a 14-day free trial.
Is there a free trial?
Yes. Every plan starts with a 14-day free trial, and you can sign up online at onyxbills.com.
Does Onyx Bills support GST?
Yes. For India it chooses CGST + SGST or IGST from the states on the invoice, generates e-Way Bills and gives GSTR-1 and GSTR-3B summaries with HSN/SAC and tax-slab breakdowns.
Does Onyx Bills handle VAT as well as GST?
Yes. Onyx Bills applies flat-rate VAT on invoices and purchases for Thailand and Vietnam, and the interface can be switched to Thai or Vietnamese.
Can I create more than one company?
Yes. You can create up to three companies under one Onyx Bills subscription, for example a second business or a branch kept on separate books.
Does Onyx Bills include inventory?
Yes. It has a built-in inventory module with FIFO lots, barcodes, unit conversions, near-expiry reports and reorder alerts. For manufacturing with a bill of materials, choose Onyx Stock or Onyx Combo.
Can I control what my team can see?
Yes. Administrator, User and Accounts roles let you show or hide each menu, and an audit trail records who created, changed, cancelled or deleted a voucher.
Do I need to install anything?
No. Onyx Bills is cloud billing software that runs in the browser at app.onyxbills.com on a computer, tablet or phone.
Can I print on a thermal printer?
Yes. Print layouts cover A4, A5, A6 and 80 mm thermal paper, with your logo and terms.
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