Kantax is a complete Norwegian accounting system — payroll, invoicing, VAT and payroll reporting. The difference is that you can connect Claude or ChatGPT straight to it, and do the bookkeeping by typing instead of clicking through forms.
30 days free · No lock-in · Cancel before the first charge
Accounting with AI
Kantax speaks MCP — the protocol AI tools use to connect to real systems. That means the AI is not guessing about your company; it reads the actual numbers and books for real.
Filing VAT and payroll reports with Altinn is still something you do yourself. That is deliberate — a filing cannot be undone.
See how to connectConnect Claude or ChatGPT to Kantax once. After that you can upload receipts, book expenses and draft invoices by typing what you want done.
Bookkeeping law, VAT, payroll reporting and SAF-T are built in from the start. The AI works inside the rules, not around them.
Choose whether the AI can only read, or also draft. Everything it does lands in the audit log, and you can revoke access whenever you like.
Flagship feature
Monthly pay runs that just work. Kantax fetches tax cards from Skatteetaten, calculates OTP and arbeidsgiveravgift, and gives you A-melding numbers ready to paste into Altinn.
Flagship feature
Payroll — April 2026Optimized for small-to-medium Norwegian AS-es and founder-led tech companies — but flexible enough to grow with you.
You have 1–10 employees and want your accounting to look like your product does. Kantax is the perfect fit.
Traditional AS-es with 2–20 employees tired of legacy accounting software. Everything from Altinn-ready reports to payslips.
Freelancers and consultants who want clean bookkeeping without the enterprise bloat. Start in minutes.
Manage multiple clients with full API access, SAF-T export, and multi-tenant architecture. Coming 2027.
Monthly pay runs with automatic tax, OTP and feriepenger. PDF payslips.
Gap-free sequential numbering per bokføringsforskriften. PDF invoices with VAT breakdown.
Log expenses with receipts attached. Automatic VAT tracking for MVA reporting.
VAT summary, A-melding, year-end bundle and SAF-T XML — all built in.
Automatic bank sync with transactions and reconciliation — in testing now, opening to more customers over time.
Upload receipts and bills. Kantax reads the amount, date and VAT, and suggests the entry.
Altinn-ready from day one
Accounting in Norway requires a dozen things in place before you can relax. Kantax has already done the work.
Chronological and systematic bookkeeping with receipt archive for 5 years.
Bi-monthly summary formatted for direct paste into Altinn.
Monthly wage report ready for Altinn — per employee, with employer contributions.
XML export on demand from the Tax Administration, per Skatteetaten's spec.
Fetched automatically from the Tax Administration once you've given Kantax access in Altinn.
Unbroken sequence per bokføringsforskriften §5-1.
Each employee's own rate, accrued and paid out in June of the following year.
One button exports the whole year as a ZIP for your accountant.
Pricing
30-day free trial. After that, kr 100/month for one user, and kr 50/month for each additional user. All prices excl. VAT. No tiers, no upgrades, no hidden fees. Cancel any time.
Can't find the answer? Email kantax@kantos.ai and a real person will reply.
No. Kantax is an ordinary accounting system that works exactly as you would expect — you can use it without connecting anything. The AI connection is an option for people who would rather type than click.
30-day free trial. You add a card when you start, and the first charge comes after 30 days. After that, kr 100/month for one user, and kr 50/month for each additional user. All prices excl. VAT (MVA). Everything is included — no tiers or add-ons. Cancel any time, also before the first charge.
Yes. Kantax follows bokføringsloven and bokføringsforskriften. Receipts archive for 5 years, invoice numbering is gap-free, and all data is exportable as SAF-T on demand from the Tax Administration.
Yes. You import customers and products from a CSV file when you set up Kantax. We help you personally with the rest of the switch — just email us.
Not for everyone yet. Automatic bank sync is being tested with us now and will open to more customers over time. Until then, you record incoming payments by marking invoices as paid.
The year-end bundle exports your full fiscal year as CSVs in a ZIP. SAF-T XML is producible on demand. Full API access for accounting firms ships in 2027.
Kantax is built by Kantos AS, a Norwegian-operated tech company. We use Kantax ourselves for our own books, and all data is exportable at any time.
Set your business up in under two minutes. Cancel any time. No surprises.
30 days free · No lock-in · Cancel before the first charge