Fortnox integrationsFortnox integration explained:
what it is, what it needs and what it costs
A Fortnox integration connects Fortnox to another system so nobody has to enter the same detail twice. Here is what it needs, how to activate it and what it costs, with Nordsynk as one example.
The Fortnox details come from Fortnox's support pages, checked 12 October 2026.
Approve permissions
Sample integration · Acme AB
The integration asks for access to these parts of the books:
- CustomersRead
- ArticlesRead
- Customer invoicesRead and write
Fortnox shows the permissions before the connection takes effect. Fortnox's own dialog looks different.
What is a Fortnox integration?
An integration is a connection between Fortnox and another system. The two exchange invoices, customers, vouchers or payments automatically, so the double entry goes away. Fortnox describes integrations as bridges between systems (Fortnox business guide, updated 4 July 2025).
Bookkeeping
Fortnox
Invoices, customers, vouchers
Connection
The integration
Sign-in · bounded permissions
Other system
E.g. e-commerce
Orders become customer invoices
Permissions
Never more than the signed-in user already has in Fortnox.
Technically, all traffic goes through the Fortnox API. The integration signs in with your Fortnox account and gets only the permissions you approve. An e-commerce link usually asks for customer invoices and articles, a payroll link for entirely different parts. That is why two integrations in the same Fortnox company can see different parts of the books.
If you want to build your own connection, start with the Fortnox API. We have written about how the API works and how sign-in is done.
What can you connect Fortnox to?
According to Fortnox, the marketplace has over 500 external integrations (Fortnox support, checked 12 October 2026). Most fall into one of four groups.
E-commerce and sales
Orders from WooCommerce, Shopify or Magento become customer invoices in Fortnox. Check how returns and part payments are handled, because that is where the connections differ most.
Bank and payments
Bank transactions are matched to invoices so the ledger balances. Ask both the integrator and your bank what they charge, since those are separate agreements.
Payroll, time and projects
Time reports become the basis for invoicing or payroll. Check which pay items are supported before you activate.
AI assistants and reporting
A newer group: connections that let you read and change Fortnox from ChatGPT or Claude instead of through Fortnox's own menus.
What does it take to activate an integration?
Three things decide whether you can activate an integration: how it is sold, who activates it and what you approve.
Two ways to buy an integration
Sales route
How the two routes differ according to Fortnox
| Label | Bought from | Paid on | Integration licence |
|---|---|---|---|
| Köp hos Fortnox | Bought fromFortnox | Paid onThe Fortnox invoice | Integration licenceNot required |
| Regular integration | Bought fromActivated via Fortnox, may carry the vendor's own price | Paid onFortnox (the licence) and the vendor (any fee) | Integration licenceRequired |
Integration licence
A regular integration needs an active integration licence on the Fortnox subscription. The licence covers the whole subscription and is added once.
“Köp hos Fortnox”
Integrations with that label are bought through Fortnox and paid on the Fortnox invoice. According to Fortnox they need no separate integration licence.
System administrator
A system administrator activates integrations under Administrera integrationer. Other users reach the marketplace through Meny, then Köp & Aktivera.
Approved permissions
Fortnox shows which permissions the integration gets before the connection takes effect. You can disconnect it later under Administrera integrationer.
What permissions does an integration get?
An integration gets only the permissions you approved, and never more than the person signing in already has in Fortnox. If you can't approve supplier invoices, no integration can give you that right.
Tell reading and changing apart. A reporting link that only reads can at worst show a wrong figure. An integration that may change things can post, approve and send invoices, so check whether the vendor requires an approval before anything is saved.
How to activate an integration in Fortnox
The steps follow Fortnox's support page “Köp av integration”, checked 12 October 2026. Fortnox may rename menus.
- 01
Open Administrera integrationer
Click the company name at the top right and choose Administrera integrationer. You need to be a system administrator.
› Company name › Administrera integrationer
- 02
Open the marketplace
Click Beställ fler licenser. Search for the integration and open it to see details and how it is activated.
› Click: Beställ fler licenser
- 03
Buy or activate
If it is labelled “Köp hos Fortnox”, click Köp. Otherwise make sure you have an active integration licence and click Aktivera integrationen.
› Click: Köp or Aktivera integrationen
- 04
Finish with the vendor
Fortnox sends you to the integration's own page and then back to the Fortnox sign-in. Sign in to the Fortnox company you want to connect.
› Sign in with your Fortnox account
- 05
Approve the permissions
Fortnox shows which permissions the integration gets. Once you approve them, the connection is active.
› Click: Godkänn behörigheter
Take questions about the activation itself to the vendor. Fortnox says it cannot tell you what an activation costs.
What does a Fortnox integration cost?
It is usually two or three items, paid to different parties. Fortnox gives no amounts on its support pages, so check them in Fortnox's price list.
The integration licence
Paid to Fortnox for regular integrations. The monthly cost depends on whether you choose a 3 or 12 month contract period.
The integration's own price
Set and invoiced by the vendor. Does it count per company, per user or per transaction? The unit, not the monthly figure, decides what it costs as you grow.
Labelled “Köp hos Fortnox”
Paid on the Fortnox invoice. According to Fortnox, those integrations need no separate integration licence.
What does Nordsynk cost?
Nordsynk costs 199 SEK per Fortnox company and user per month, bought through Fortnox Marketplace. Each user needs their own seat in every Fortnox company where they work, so one seat never covers several companies.
Accounting firms use a direct agreement instead: 490 SEK/month base fee covering all consultants, plus 149 SEK per active client company per month for the first ten. With a direct agreement, each client company may need an active integration licence in Fortnox. That is separate from the Nordsynk agreement.
You see what your subscription requires in Fortnox when you activate.
Example · sample users and companies
Nordsynk via Fortnox Marketplace
199 SEK per Fortnox company and user per month
| User | Companies | Seats | Per month |
|---|---|---|---|
| Anna | CompaniesAcme AB, Berg & Söner AB | Seats2 | Per month398.00 SEK |
| Björn | CompaniesAcme AB | Seats1 | Per month199.00 SEK |
| Cecilia | CompaniesBerg & Söner AB | Seats1 | Per month199.00 SEK |
Nordsynk as a Fortnox integration
Nordsynk is a newer kind of integration. It doesn't move data between two systems. You ask questions about your books in ChatGPT or Claude, and the answers come straight from Fortnox.
Example · sample invoices
| No. | Due | Supplier | Amount |
|---|---|---|---|
| 1042 | 23 Jun | Norrlux | 1 249 |
| 1047 | 24 Jun | Fjordbo | 4 800 |
| 1051 | 26 Jun | Kvarnen | 12 500 |
Example · sample invoice
Preview · Fortnox
Approve supplier invoice 1042
Requested via Claude · Acme AB
| Invoice | In Fortnox now | After approval |
|---|---|---|
| 1042 · Norrlux · 1 249.00 kr | In Fortnox nowNot approved | After approvalApproved |
Fortnox permissions and access policies still apply to approved changes.
You type “Which supplier invoices fall due this week?” and get the list with amounts, due dates and suppliers. You type “Approve invoice 1042” and get a preview. Nothing changes in Fortnox until you have approved it.
Nordsynk doesn't replace an e-commerce link or the bank connection in Fortnox. It is for the work you otherwise do by hand in Fortnox: finding, reconciling, reporting and approving.
If you want supplier invoices read in automatically instead, there is Nordsynk Supplier Invoices, a separate Fortnox integration with its own activation.
Frequently asked questions about Fortnox integrations
What is a Fortnox integration?
A Fortnox integration is a connection between Fortnox and another system, such as a web shop, a bank or an AI assistant. The two exchange data automatically through the Fortnox API so nobody enters the same detail twice. The integration gets only the permissions you approve when you activate it.
Do I need an integration licence in Fortnox?
For a regular integration, yes: Fortnox requires an active integration licence on the subscription, added once for the whole subscription. Integrations labelled “Köp hos Fortnox” are bought through Fortnox and, according to Fortnox, need no separate licence. The details come from Fortnox support, checked 12 October 2026.
How do I activate an integration in Fortnox?
As a system administrator, click the company name, choose Administrera integrationer and then Beställ fler licenser to open the marketplace. Open the integration and click Köp or Aktivera integrationen, sign in to the Fortnox company you want to connect and approve the permissions.
What does a Fortnox integration cost?
It depends on the integration. You may pay Fortnox for the integration licence, the vendor for the integration, or everything on the Fortnox invoice if it is labelled “Köp hos Fortnox”. Fortnox gives no amounts on its support pages, so check Fortnox's price list and the vendor's price, and ask which unit the price counts in.
What permissions does an integration get?
Only the ones Fortnox shows when you approve the connection, and never more than the signed-in user already has in Fortnox. Under Administrera integrationer you can see who activated each integration and disconnect it.
Can an integration change my books without my approval?
It depends on the integration. A connection that may write can technically post straight away. Nordsynk holds every change for your approval by default and logs the decision. Fortnox permissions and access policy still apply to approved changes.
What does Nordsynk cost, and does it cover several Fortnox companies?
199 SEK per Fortnox company and user per month through Fortnox Marketplace. You connect each company separately and reach them from the same AI assistant, but a seat doesn't cover several companies: one user in ten companies is ten seats. Accounting firms use a direct agreement instead. Starts at 937 SEK/month excl. VAT, base fee included.
Can I connect ChatGPT or Claude to Fortnox?
Yes, with Nordsynk. You add Nordsynk as a connection in Claude or ChatGPT and sign in with your Fortnox account. Then you can ask questions about your books in Swedish and request changes, which you approve before they are made.
Try Nordsynk on your own books
Activate Nordsynk in Fortnox and connect Claude or ChatGPT. You sign in with your usual Fortnox account.