Connecting Payhawk to KSeF

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The integration between Payhawk and Poland’s National eInvoice System (KSeF) will be available starting February 9, 2026.

You can receive structured electronic invoices directly in Payhawk via Poland’s National eInvoice System (KSeF), using the FA_VAT (XML) format.

The integration between Payhawk and KSeF helps you reduce manual invoice handling and keeps invoice data consistent from receiving to export.

To connect Payhawk to KSeF:

  1. Log in to the Payhawk web portal.

  2. Go to Settings > Integrations > eInvoicing tab.

  3. In the KSeF dialog, click on Connect.

    Payhawk integrations page showing active and available integrations for various systems.

  4. On the Overview page, click on Continue.

    Instructions for registering with KSeF, including uploading certificates and linking VAT number.

  5. On the next page:

    1. Under Upload certificate, upload the certificate you’ve generated from the KSeF 2.0 application.

    2. Under Private key, upload the private key you’ve generated from the KSeF 2.0 application.

    3. Under Password, enter the password you’ve generated from the KSeF 2.0 application.

  6. Click on Continue.

  7. On the next page, click on Back to integrations.

    Confirmation message indicating certificate verification and next steps for user notification.

After the verification is completed, you can start issuing invoices via KSeF, receiving eInvoices from suppliers connected to KSeF, and exporting eInvoices from Payhawk.

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