Klarna Shipping Service for WooCommerce

Klarna Shipping Service for WooCommerce is not compatible with Klarna External Payment Methods or Subscription based payments.


Klarna Shipping Service for WooCommerce is an add-on plugin to Klarna Checkout for WooCommerce. This add-on plugin makes it possible to display shipping options in the KCO iframe provided by your TMS.


  • Your Klarna account needs to be activated for Klarna Shipping Service with TMS before using this plugin.
  • Requires WooCommerce together with Klarna Checkout for WooCommerce to be used.
  • Klarna Shipping Service is used for handling the shipping methods in your store. However, it is still required to have at least one native WooCommerce shipping method active for each shipping zone you enabled KSS.
  • HTTPS is required on your site.


To install this plugin you first need to have Klarna Checkout for WooCommerce installed. You install this plugin just like any other WordPress plugin:

  1. Download and unzip the latest release zip file.
  2. If you use the WordPress plugin uploader to install this plugin skip to step 4.
  3. Upload the entire plugin directory to your /wp-content/plugins/ directory.
  4. Activate the plugin through the ‘Plugins’ menu in WordPress Administration.


  1. Navigate to --> WooCommerce --> Settings --> Payments and select Klarna Checkout.
  2. Make sure that the checkbox Shipping methods in iframe is ticked in the Shipping settings section.

  3. Save the payment gateway settings.
  4. Navigate to --> WooCommerce --> Settings --> Shipping.
  5. For every shipping zone you have created you need to add Klarna Shipping Service as a new shipping method.

If everything is working fine you should be able to see the shipping methods provided by your TMS in the KCO iframe now:

Each TMS system has its own configuration process to connect to Klarna.

Shipping data in WooCommerce order

When an order has been created in WooCommerce, the name and price of the selected shipping method in the KCO iframe is added to the order.

The entire shipment data sent from Klarna for the order is also stored in the WooCommerce order, as an order meta field with the name _kco_kss_data. This data is stored as a json object with the following structure:

	"id": "id-1000",
	"name": "Pickup Box",
	"price": 500,
	"tax_amount": 0,
	"tax_rate": 0,
	"preselected": false,
	"shipping_method": "BoxUnreg",
	"delivery_details": {
		"carrier": "instabox",
		"class": "economy",
		"product": {
			"name": "MyPack",
			"identifier": "10"
		"pickup_location": {
			"id": "loc-2",
			"name": "Coop Loet",
			"address": {
				"street_address": "Storgatan 59",
				"postal_code": "97232",
				"city": "Luleu00e5",
				"country": "se"
	"tms_reference": "100"

Subscription support

Subscriptions are not supported.

Tracking ID & Tracking URL reporting to Klarna

The Tracking information is sent to Klarna when the order is set as "Completed" in WooCommerce through the Klarna Order Management plugin. In order to send the Tracking data in this sequence to Klarna you will need to save the Tracking ID and the Tracking URL of the shipment to the order as a post meta before the order is set as "Completed" in WooCommerce. The post meta key we are expecting is _kss_tracking_id and _kss_tracking_url.

No booking of shipment

This plugin enables Klarna Shipping Service into Klarna Checkout and your WooCommerce order. However, the actual booking of the shipment in your transport administration system is not handled in this plugin. There are a lot of TMS services available and every system has their own API. That's why we don't to connect to a specific TMS in this plugin.

If you are a customer of Unifaun, Webbshipper or Consignor it can be good to know that we are actively working on creating plugins/integrations to these systems.

Feature roadmap

The Klarna Shipping Service plugin is in active development. New features are introduced on an ongoing basis. The following features are currently planned:
  • More detailed display of shipping meta data (pickup location etc) in WooCommerce order.
  • Creating endpoint for external services to update the WooCommerce order with the tracking ID for the shipment created in the TMS (for those TMS'es that doesn't report this directly to Klarna).
  • Develop plugin to Unifaun and other TMS platforms to offer a better and more complete integration experience.
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