Fast support – no AI
Support when it really matters
Reliable systems for everyday use
A modern platform built for growth
The best total price on the market
Fast support – no AI
Support when it really matters
Reliable systems for everyday use
A modern platform built for growth
The best total price on the market

POS and Fortnox

Direct integration between the register and Fortnox saves 30–60 minutes a day and eliminates type-related accounting errors. Here's how it actually works.

Av · Produktchef||

Manual booking of daily takings is one of the industry's biggest time sinks. When the register talks to Fortnox directly, the journal entry is created automatically, with correct VAT split and the right accounts.

What is direct integration?

Direct integration means the POS sends data to Fortnox via API without a manual intermediary. When you run the Z-report in the evening, the journal entry appears in Fortnox the same night, ready to review.

What you skip doing manually

  • Typing daily takings into Fortnox by hand.
  • Splitting VAT 12% and 25% — done automatically.
  • Mapping card acquiring, Swish and cash on different accounts.
  • Posting returns and corrections separately.
  • Calculating tip distribution and entertainment.

What's left for the accountant?

Quality control, oversight and advice. The consultant no longer spends time on data entry and can focus on analysis and strategy. Many firms repay hours via lower monthly fees.

How to set up the integration

Activate Fortnox integration in ViralConvert, approve the app in Fortnox with admin rights, map the accounts once and choose the payout day. The whole process takes 30–45 minutes.

If you don't use Fortnox

For other accounting systems (Visma, Bokio, Hogia) use SIE export instead — a standard file every Swedish accounting program reads.

How do you reconcile?

Direct integration creates a journal entry per day. Bank reconciliation runs once a month via Fortnox's automatic bank link. Differences alert in both the register and Fortnox.

Reviewed by Product Manager Emil Lindgren, May 2026.

Frequently asked questions

Do we need Fortnox Premium?+

No, the integration works with Fortnox Bookkeeping (the base plan).

How securely is data transferred?+

Encrypted TLS 1.3 connection and OAuth tokens, no plaintext passwords.

What happens if Fortnox is down?+

Entries are queued and sent as soon as Fortnox is back. Nothing is lost.

Can we switch from manual mid-month?+

Yes, but it's easiest to start the first day of a new month.

Does the integration cost extra?+

At ViralConvert it's included in the monthly fee. Check the vendor's price if you compare.

Want to see the Fortnox flow live?

Book a demo and we'll walk through the setup and show the entry being created in real time.