Works offline
KhataOS is an app on your computer or phone, not a website. Your daily work needs no internet connection.
Accounting at the speed of your keyboard.
KhataOS is free, open source accounting software that works offline. Your books stay on your device, and many shortcuts Tally users know work the same way.
For Windows, macOS, Linux and Android. KhataOS is in alpha, so try it on a test company first.
Familiar shortcuts
- F4 Contra
- F5 Payment
- F6 Receipt
- F7 Journal
- F8 Sales
- F9 Purchase
- Alt+G Go To
- Ctrl+A Save
The same letters on the home menu, too. See every key
01/Why KhataOSFor small businesses and their accountants
Accounting that stays yours.
No subscription, no server you have to trust, no new keys to learn. Open the app and enter your first voucher.
Your books stay on your device
Each company is one file on your own disk. Nothing leaves it unless you choose to share it.
Free and open source
Licensed under the AGPL. Read every line on GitHub, build it yourself, or help make it better.
Familiar shortcuts for Tally users
Voucher keys, Go To, the home menu letters. Every action has a key, and the mouse and touch work too.
A history that shows tampering
Every change is a linked entry in a chain of hashes. The trail can't be switched off, and KhataOS checks it each time a company opens.
Share without pen drives
Work over the office network, through a relay that only you and your accountant can read, or with a sealed file.
02/Built for your countryCountry packs
Tax rules for where you work.
Each country's rules live in their own pack, and each pack says plainly how far it has been tested.
Tested live
Run from start to finish against the authority's official test service.
Test server only
The connection is built, and so far tried only against our own server that imitates the published API.
Needs official validation
The app makes the file or return, but it hasn't been checked with the official validator yet.
India
GST with CGST, SGST and IGST from the place of supply. GSTR-1, GSTR-3B and GSTR-2B reconciliation, TDS and TCS, Schedule III, and e-invoice and e-way bill JSON.
- e-Invoice through an IRPTest server only
- GSTR-1, e-invoice, e-way bill and TDS filesNeeds official validation
United Arab Emirates
TRN checks, 5% VAT, the VAT 201 return and PINT AE e-invoices.
- Peppol Access PointTest server only
- PINT AE XMLNeeds official validation
Saudi Arabia
15% VAT, the VAT return, invoices in English and Arabic, and ZATCA Phase 2 e-invoices with the hash chain, QR code and stamp.
- ZATCA onboarding, clearance and reportingTested live On the sandbox in ZATCA's developer portal. Simulation and production need a real taxpayer's OTP.
United Kingdom
VAT at 20%, 5% and 0%, reverse charge, VAT schemes and the 9 box VAT return.
- Making Tax Digital submissionTest server only A live test needs a registered HMRC developer application.
Singapore
GST with its rate history, the GST F5 return and PINT SG e-invoices for InvoiceNow.
- InvoiceNow Access PointTest server only
- PINT SG XMLNeeds official validation
Germany, France, Netherlands, Spain
Tax ID checks, rates and reverse charge. UStVA, CA3, the aangifte and modelo 303, with XRechnung, Factur-X and VeriFactu records. Nothing is sent to the tax office.
- Returns and e-invoice filesNeeds official validation
United States
Sales tax from the jurisdictions you set up, a nexus warning, use tax, exemption certificates and the Form 1099 list.
- Sales tax figuresNeeds official validation
Mexico
IVA and withholdings, CFDI 4.0 with the CSD seal, payment receipts and a monthly IVA summary.
- PAC stampingTest server only
- CFDI XMLNeeds official validation
Your country next
India, the UAE, Saudi Arabia, Singapore and the UK are the launch markets. The other packs are less mature. Every tax rule cites an official source, and you can help check them.
Report a wrong tax ruleAll figures are a preparation aid. Check them with your accountant before you file.
03/ThemesSeven themes, light and dark
A look for every desk.
Pick a theme in the app with Ctrl+K, then Theme. Every one comes in light and dark, and every one meets WCAG 2.2 AA contrast.
- LedgerFor everyone
- CharteredFor accountants and auditors
- ExecutiveFor owners and directors
- TerminalFor finance and tech enthusiasts
- FreshFor first businesses
- ComfortFor long days and low vision
- RegionalIndia, Gulf, UK, East Asia
Ledger
For everyone
Indigo and marigold on warm paper: the brand palette, and the theme KhataOS starts with.
04/EverywhereRust inside, small on disk
One small app on every device.
KhataOS is written in Rust and uses the web view your system already has, so it ships no browser of its own. That keeps it small and quick to start. The same books and the same keys work on your computer and your phone; on a phone you get a touch layout with a drawer of function keys.
- WindowsWindows 10 or 11 · 9 MB installer
- macOSApple silicon and Intel · 22 MB, one file for both
- LinuxAppImage, .deb or .rpm · 12 MB package
- AndroidAndroid 7 or later · 12 MB for most phones
- iPhone and iPadDevelopers can build it from source todayComing later
- 9 MB
- Windows installer
- 12 MB
- Android app for most phones
- 0.5 s
- to open a company with 50,000 vouchers
- Rust
- engine, with Tauri for the window
Sizes are for v0.1.0 alpha.2. Speed measured on an Apple silicon Mac.
05/PrinciplesWhat we hold to
Plain rules, kept in the open.
Your data is yours
Your books live in a file on your device. Nothing is sent anywhere unless you choose to share your books or send a report.
Honest about status
We say what is tested live, what isn't, and what's missing. The roadmap lists all of it.
Rules from the source
Each country's rules live in their own pack, and every tax rule cites an official source.
Built in a clean room
KhataOS reproduces the behaviour accountants rely on, like the keys and the workflow. It copies no code, text, graphics or branding; the screens are our own design, arranged around the keys Tally users know.
Readable by everyone
Every theme meets WCAG 2.2 AA contrast in light and dark, and a script checks every colour pair.
Free for good
The AGPL lets you use, study, change and share KhataOS. Anyone who runs a changed version as a service must share the changes.
Coming from Tally?
Your habits come with you. Most everyday keys work as you expect. Import your masters and vouchers from Tally's XML export, and read what works differently, and what isn't there yet, before your first week.
F8Sales
F9Purchase
Ctrl+HChange mode
Alt+GGo To
Alt+XCancel voucher
Alt+F2Period
Try it on a test company.
KhataOS is in alpha. Enter a few days of vouchers, compare the reports, and tell us what breaks.