Fortnox SIE4 export — how it works with BrandGate

The file follows the SIE format version 4E and contains journal entries, chart of accounts, and balance reports. Importable into all major Swedish bookkeeping systems including Fortnox, Visma, and e-conomic. The file follows the SIE format version 4E and contains journal entries, chart of accounts, and balance reports. Importable into all major Swedish bookkeeping systems including Fortnox, Visma, and e-conomic. Use case: Accountants and bookkeepers wanting a monthly bookkeeping dump. No Zapier middleware, no manual export, no separate licensing — the Fortnox integration is included in BrandGate Starter from 990 SEK/month. You pay your normal Fortnox license separately to Fortnox. Sync time per operation is under 2 seconds. During Fortnox maintenance (typically Friday evenings) operations queue locally and replay when service is back.

**Step 1** — Authorise Fortnox via OAuth (no API keys to handle manually). **Step 2** — Configure the export button in the reports module. BrandGate auto-suggests sensible defaults based on your Fortnox chart of accounts. **Step 3** — Test with a sandbox invoice. BrandGate creates a test distributor and generates a test invoice so you can verify the format before flipping live. **Step 4** — Activate live sync. From now on SIE4 export is handled automatically for every order. Total setup time: 30 minutes in the normal case.

**Duplicate customers on org changes.** If a distributor changes org. number (common at company splits) BrandGate may create a new customer instead of matching. Fix: use Fortnox's customer-match flag manually once. **Wrong VAT rate on export orders.** On B2B exports to the EU, reverse charge must apply. BrandGate auto-detects this but requires the distributor to have a valid VAT number registered — missing it means the invoice goes out as Swedish 25% by mistake. **Sync pause during Fortnox maintenance.** Fortnox has scheduled maintenance windows. BrandGate queues and syncs when the service is back — no manual action needed but worth knowing the invoice can land with a few minutes' delay.

The BrandGate-Fortnox integration is designed to meet Swedish accounting standards and Skatteverket's requirements. Specifically for SIE4 export: - **Bokföringslagen Chapter 4** — all business events register in real time (under 2 seconds), with audit trail showing who placed the order and when the invoice was generated. - **Skatteverket VAT rules** — automatic classification against the right VAT account, OSS reporting for B2C within the EU. - **SIE4 export still available** — for accountants who want monthly dumps in addition to the live sync. For accountants familiar with Fortnox: BrandGate's integration doesn't change how Fortnox works — invoices look exactly like they were entered manually.