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Kustom Shipping Assistant

A smooth shipping experience – right in the checkout

Kustom Shipping Assistant is an extension for Kustom Checkout and Kustom’s shipping integrations. It allows you to display shipping options directly within the KCO iframe, fetched from your TMS (Transport Management System) – making the delivery experience a natural part of your checkout flow.

  • Let customers choose how they want their delivery

  • Display the right shipping options in the right order – including add-ons, delivery times, and pickup locations

  • No custom integration required – works through partnerships with leading logistics providers

Kustom

The delivery experience – still a challenge?

In e-commerce, delivery is one of the last major friction points.
How can we allow customers to select their preferred shipping method directly at checkout?
How can we ensure a smooth experience all the way – from shipping choice to tracking and returns?

Shipping has a big impact on purchase decisions. With Kustom Shipping Assistant (formerly Klarna Shipping Assistant), delivery becomes a seamless part of the buying process – not a source of friction.

Embedded directly in the KCO iframe

Kustom Shipping Assistant fetches shipping options from your TMS and displays them directly within the Kustom Checkout iframe, giving customers a smooth and uninterrupted checkout experience.

Make the simple things even easier

Simplify your order management in WooCommerce with Krokedil Shipping Connector

If you’re using Kustom Shipping Assistant and have nShift as your logistics partner, you can simplify your daily workflow even further with the Krokedil Shipping Connector.

Directly from your WooCommerce store, you can:

  • Book shipments in the nShift system
  • Print shipping labels
  • View tracking links and delivery status

Learn more and purchase Krokedil Shipping Connector here.

From Klarna to Kustom – what does it mean?

Klarna Shipping Assistant and Klarna Checkout have been acquired by Kustom and are now renamed Kustom Shipping Assistant and Kustom Checkout.
You don’t lose any functionality – quite the opposite. Kustom builds on the strengths of Klarna’s solution, offering a more modern interface, clearer business terms, and merchant-focused support.

Reliability in a new era

For over a decade, Klarna Checkout – and by extension Klarna Shipping Assistant – has been a core part of the customer journey for thousands of online merchants. Now we move forward with Kustom Shipping Assistant – a solution built on the same technical foundation, robust infrastructure, and WooCommerce expertise.

With a new name comes new opportunities – enabling a more modern and streamlined shipping experience, directly in the checkout.

Register your interest in Kustom Checkout today – and lay the foundation for a future-proof checkout with flexible shipping options.

Kustom interest

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Optimize your shipping flow – and increase conversions

Full control of your shipping presentation

Decide exactly which shipping options should be shown, in what order, and which add-ons (such as delivery times or pickup points) are available – all controlled via your TMS.

No custom integration needed

Thanks to partnerships with leading shipping platforms, Kustom Shipping Assistant works out-of-the-box – no manual setup or API integration required.

A better experience for your customers

Shipping is often the deciding factor in whether a customer completes their order. By letting shoppers choose their shipping method directly in the checkout, providing clear information, and offering flexible options like pickup points – you can boost trust, satisfaction, and conversion.

Documentation

In our documentation for Kustom Shipping Assistant you will find answers on how to configure and get started with the plugin. There you will also find info how to adjust the plugin and how you can troubleshoot.

Contact support

If you need help or have questions regarding Kustom Shipping Assistant plugin, please click the support button below or read our documentation.

Articles

Technical information

Related plugins

These are other plugins from us at Krokedil that work well with Kustom Shipping Assistant.

Krokedil Shipping Connector

Krokedil Shipping Connector

Book deliveries with nShift directly from WooCommerce with Krokedil Shipping Connector when you let your customers choose how and where the delivery is made with nShift Checkout or Kustom Shipping Assistant.

Read More »
Kustom Checkout for WooCommerce

Kustom Checkout for WooCommerce

With Kustom Checkout, you get the next-generation payment experience for WooCommerce – built on the foundation of Klarna Checkout and over a decade of experience from Krokedil. New name, same trusted core.

Read More »

Version history

1.3.3
  • Fix - Fixed an issue where an overridden shipping cost was not added to the Kustom Checkout order, causing the order total to differ from WooCommerce.
1.3.2
  • Fix - Fixed an issue where shipping costs were miscalculated for stores treating shipping prices as tax-inclusive.
  • Fix - Fixed an issue with price calculation for free trial subscriptions with shipping, preventing the subscription from being completed.
1.3.1
  • Fix - Resolved PHP 8 deprecation warnings.
1.3.0
  • Feature - Updated visual rebranding to align with the Kustom brand identity.
1.2.3
  • Feature - Added "Tax status" as setting for nShift Checkout shipping method.
1.2.2
  • Fix - Fixed undefined index notice.
1.2.1
  • Enhancement - Add a filter 'klarna_kss_shipping_method_add_rate' for the calculated shipping rate.
1.2.0
  • Feature - The plugin now supports WooCommerce's "High-Performance Order Storage" ("HPOS") feature.
1.1.5
  • Fix - We have resolved an issue where, if WPML's automatic currency switcher was enabled and the currency differed from the store's default currency, the shipping cost would be converted twice. As a result, there was a mismatch between WooCommerce and Klarna.
  • Enhancement - Additional translatable labels.
1.1.4
  • Tweak - The shipping package will no longer be created if the cart does not need shipping (contains only digital products). Fixes the "merchant-aggregator" shipping method.
  • Tweak - When creating the shipping package, the currency will now be passed along to prevent double-conversion that is caused by some currency switchers.
  • Fix - Fixed undefined index notice.
1.1.3
  • Fix - Fixed an issue where shipping method changes were detected incorrectly.
1.1.2
  • Enhancement - The merchant will be notified about detected discrepancies in the total amount in reference to Klarna Checkout.
  • Enhancement - Modified how we calculate shipping cost and tax to prevent rounding issues.
1.1.1
  • Fix - Fixed an issue that could cause the wrong tax class name to be displayed to the customer.
1.1.0
  • Enhancement - General improvements to the plugin to support the new version of KCO.
1.0.1
  • Fix - Fixed a bug caused by removing the shipping line from the Klarna order object when having a fee.
1.0.0
  • Changed the name of the plugin to Klarna Shipping Assistant.
  • Feature - Added a feature that adds a tag to the Klarna order when a free shipping coupon is used. This tag is called "ksa_free_shipping" and can be read by the TMS to enable free shipping alternatives.
  • Feature - Added product shipping classes as tags to the Klarna order items. These tags can be read by the TMS system to change what shipping methods should be available.
  • Feature - Replace the shipping calculation on the cart page with a standard display for Klarna Shipping Assistant. It will either show the KSA shipping information if it exists, or it will tell the customer that shipping is calculated on the checkout page.
  • Enhancement - Improved the speed and reliability of the checkout process when using Klarna Shipping Assistant. These changes requires you to use this plugin along with Klarna Checkout for WooCommerce version 2.4.1 or newer. Older versions will no longer work.
0.2.1
  • Fix - Save Klarna data in Woo order and reply to JS validation event even for 0 value orders.
0.2.0
  • Enhancement - Display KCO checkout even if order total is 0. This is needed to save tms data correctly in Woo order.
0.1.6
  • Enhancement - Added support for special signs (åäö) get formatted correctly to the order.
  • Enhancement - Allow plugins to add setting to KSS shipping method.
0.1.5
  • Enhancement - Added support for Klarna Checkout For WooCommerce 2.x.
0.1.4
  • Fix - Wrapped our functions in method exists to prevent error if WooCommerce is disabled.
  • Enhancement - Added tax amount to the shipping method for KSS orders.
0.1.3
  • Fix - Reverted the way shipping tax is added to order.
0.1.2
  • Fix - Correctly add shipping tax to order.
  • Fix - Default to 0 for missing product dimensions.
0.1.1
  • Tweak - Updated readme.
0.1
  • Initial release