Experienced E-commerce Agency for Magento/ Adobe Commerce/ Shopify/ Shopware Development

How to Add Klarna to Your Shopify Store: A Simple Guide

Online shopping is more common than ever, but not everyone can pay for products and services upfront. That’s where Klarna can come in handy. You may have seen this icon when paying for something online, or someone has suggested you try the service.

Klarna is a popular service on e-commerce platforms, and Shopify is not an exception. Klarna Shopify will bring users more impressive and convenient shopping experiences. This article will inform readers about the benefits, how to integrate Klarna with Shopify, and notes on when to use it.

What is Klarna?

Klarna is a Swedish fintech business that offers various financial services, emphasizing “buy now, pay later” (BNPL) solutions for online purchasing. It enables customers to make purchases and pay for them in interest-free installments or postpone payment for a set time.

Klarna’s services are linked to online retailers, allowing customers to use Klarna as a payment option during checkout. Customers can divide payments into smaller, interest-free installments or choose to pay for their products in full within a set period, often 30 days, without incurring interest.

It has grown in popularity because it allows consumers to manage their payments more easily and has streamlined online retail checkout. In some areas, Klarna now offers banking services, savings accounts, and a Klarna credit card in addition to the “buy now, pay later” approach.

How does Klarna work?

Klarna allows you to shop online without paying the full transaction amount upfront. You’re buying a new pair of shoes that’s a bit expensive. If the merchant you’re using works with Klarna, you can pay the full amount later or the total amount in installments.


Payment types of Klarna

Klarna’s installment option allows you to split your purchase into interest-free payments on compatible websites. The total cost is divided equally, with the first payment due at purchase. Late payments may incur fees, so it’s important to stick to the schedule. Klarna provides an app for tracking and managing payments, and a mild credit check for approval won’t affect your credit score. This offers a practical way to handle larger purchases over time without accruing interest, as long as payments are timely.

Pay in 30 days

With Klarna’s “Pay in 30 Days” option at checkout on supported online stores, you can receive your purchased item immediately and delay full payment for 30 days. If paid within this period, typically no interest is charged, but late payments may incur fees. Klarna sends a reminder before the due date, and through their app or website, you can manage payments and monitor your purchase. This option allows a brief period for product satisfaction assessment before payment, emphasizing the importance of meeting the 30-day deadline to avoid extra charges.


Klarna’s financing option, distinct from their “Pay in 30 Days” or installment plans, provides extended payment terms with associated interest rates. Eligible at supported stores, this option allows you to choose a fixed monthly payment plan over a longer period, based on a credit check. While offering flexibility for larger purchases, it incurs interest charges, varying with your creditworthiness and chosen plan.

When paying with Klarna, you’ll get a quick overview of the payment process and your due date. Confirming your identity requires providing your date of birth, and users must be 18 or older. Once confirmed, you’re directed to a separate window on the Klarna website for payment processing.

Klarna requires you to confirm age before payment

The benefits of integrating Klarna with Shopify

Klarna Shopify integration offers several advantages for both merchants and customers:

  • Enhanced checkout experience: Klarna simplifies the checkout process and reduces cart abandonment by offering a variety of payment choices. Customers can choose between “Pay in 30 Days” and payment plans, increasing flexibility.
  • Increased sales: Offering different payment alternatives frequently leads to higher conversion rates. Customers value Klarna’s flexibility, encouraging them to make purchases they might not have made otherwise.
  • Reduced risk for merchants: Klarna assumes the risk of nonpayment, guaranteeing that money is received by the merchant as soon as possible, even if the consumer selects an installment plan.
  • Higher average order value: When allowed to split payments over time, customers tend to spend more, resulting in higher average order values.
  • Improved customer loyalty: Merchants utilizing Klarna on Shopify may increase consumer loyalty and happiness by providing a smoother, more flexible payment experience.
  • Easy integration: The integration of Klarna with Shopify is relatively simple, requiring little technical knowledge and allowing merchants to adopt these payment methods swiftly.
Increasing sales with Shopify Klarna

Overall, the integration of Klarna with Shopify is a win-win situation for both parties, giving a better shopping experience for customers while increasing sales and lowering risks for businesses.

How to integrate Klarna with Shopify

Integrating Klarna with your Shopify store involves a few steps to enable Klarna as a payment option. We will introduce you to the two most popular and easiest methods about how to add Klarna to Shopify.

Method 1: Integrate directly

Klarna’s integration with Shopify required the Klarna Payments app to use Klarna as a payment method. Here is a step-by-step guide to integrating the Klarna Payments app on Shopify.

Step 1: Install the Klarna payment application

To integrate Klarna into Shopify, you must first download this application on your Shopify store. Log in to your Shopify account as an admin to control and edit the app store on Shopify. On the application search toolbar, type the keyword “Klarna” and click the install button to start downloading the application on the store. 

Klarna on Shopify store

After installation, you must allow Klarna to access your Shopify store data. In other words, you will have to authorize using this application. In addition to accessing data, you must extend additional necessary permissions to connect Klarna on Shopify.

Step 2: Configure Klarna settings for seamless integration

The next step is integrating Klarna’s configuration to work seamlessly with Shopify. Fill in your Klarna API credentials from the Shopify homepage to complete the integration. Then, you must press the save settings button to connect these two applications. This authentication code will help ensure Klarna and Shopify are properly integrated and working effectively.

Confirmation before integrating Klarna Shopify

Once you have completed the above step, you can adjust your Shopify store’s look and payment options. For example, you can choose language, payment method, currency, or other Klarna features. You can take some time to explore the convenient customizations of this application. Surely, you will find designs that suit your products and have a customer-friendly interface.

Step 3: Activate your Klarna payment methods

The above two steps have helped you integrate Klarna with your Shopify store, and now you need to create payment options for customers. First, go to Klarna’s Shopify homepage. You can freely adjust different payment options to suit your customers’ needs. Klarna normally has 3 payment options: installment, pay in 30 days, and financing. Determine the appropriate payment method and save this setting to serve customers when they pay.

Go to Klarna's Shopify homepage

You can also customize the maximum and minimum order amounts for different payment options. It will help the store control the customer’s ability to pay and help them choose the appropriate payment method based only on their purchase invoice.

Another add-on you can consider for your Shopify store is displaying Klarna on your product pages. This will let customers know that it is possible to pay with Klarna when making purchases in your store. From there, your store will gain customers’ trust and help Klarna become their priority whenever they pay for goods.

Step 4: Test and launch

Following setup, it is critical to conduct test transactions to confirm that Klarna payments function properly on your Shopify store. Many integrations or apps have a sandbox or test mode that allows you to mimic transactions without processing money. After you have checked and ensured everything works properly, you may start accepting Klarna payments from your clients.

Step 5: Activate Klarna On-site messaging app

This app helps Shopify stores notify customers directly about their order status during the ordering process. The process of activating klarna’s On-site messaging app on Shopify involves a few steps:

  • Install the Klarna On-Site Messaging App: Head to the Shopify App Store and search for the Klarna On-site Messaging app. After that, install the app to integrate it into your Shopify store.
Klarna On-Site Messaging on Shopify App Store
  • Access the app settings: Access the Klarna On-site Messaging app within your Shopify admin panel once installed. This is typically found in the Apps section.
  • Customize messaging: Within the Klarna On-site Messaging app, you can customize the messages to align with your store’s branding and the specific Klarna services you offer. This includes details about “Buy Now, Pay Later” or other Klarna payment options available.
  • Generate code or script: The app usually provides a code snippet or script.
  • Integrate with your Shopify theme: Navigate to your Shopify theme settings or the page where you want the Klarna on-site messaging to appear. Then, insert the provided Klarna code snippet within your Shopify theme’s HTML or script section. Depending on where you want the messaging to occur, this could be in the theme code or a specific page template.
  • Test and Verify: After implementing the code, test your Shopify store to ensure the Klarna on-site messaging appears correctly.

Remember that the particular procedures may vary slightly depending on the app’s UI and your Shopify theme. Follow the steps provided by the Klarna On-site Messaging app and consult their support documentation if you need help integrating the app with your Shopify store.

Method 2: Use the Shopify integration service by Mageplaza

In addition to directly integrating Klarna with Shopify, you can also use Mageplaza’s integration service to do this. This is a service that helps integrate Shopify store data with other applications, making use of this platform faster and more convenient. In addition, you can also develop many other features in the store’s software interface.

Mageplaza’s integration process will follow the following 4 steps:

Analyze requirements: It is a crucial step in the process of understanding what a business needs to achieve its goals and objectives. This analysis helps in shaping strategies, making informed decisions, and allocating resources effectively. Specifically, Mageplaza will consider the audience of your Shopify store and offer the most suitable integration service.

  • Integrate your store: After analyzing your goals and choosing the right service, Mageplaza will support integrating applications into your Shopify store. At the same time, they will also adjust some necessary display information to meet the needs of the store.
  • QA testing & fix bugs: The QA testing and bug-fixing process is iterative and may be repeated in different phases of the software development life cycle to catch and address issues at various stages. Continuous collaboration between development and QA teams is essential for a smooth and effective testing process.
  • Support & maintenance: After completing the integration service, Mageplaza will continue to support customers if there are any problems. By effectively managing support and maintenance processes, businesses can ensure that their services remain reliable, secure, and aligned with user expectations over time.
Mageplaza’s Shopify integration process

Not only does it support integrating payment applications into Shopify stores, Mageplaza also provides various integration services such as:

  • Inventory management integration: The goal is to create a seamless flow of information and improve the efficiency of managing and tracking inventory across various aspects of a business.
  • Shopify shipping API integration: Integrating with the Shopify Shipping API allows you to automate and streamline shipping-related processes on your Shopify store. It enables you to access shipping rates, create shipping labels, and manage other shipping-related tasks programmatically.
  • Marketing integration: It refers to the process of combining different marketing tools, channels, and strategies to create a cohesive and effective marketing ecosystem
  • Customer relationship management integration: By seamlessly connecting your CRM system with various functions of your store, you can build stronger customer relationships and drive business success
  • Social media integration: It involves a strategic approach, constant monitoring, and a willingness to adapt to changing trends and audience behaviors
  • Accounting and bookkeeping integration: This process can significantly improve efficiency, accuracy, and financial management
  • Reporting integration: It empowers businesses to derive meaningful insights from their data, enabling better decision-making.
  • CMS integration: It can enhance efficiency, improve collaboration, and ensure a consistent online presence
Shopify integration service by Mageplaza

In addition, Mageplaza’s service is also trusted by many customers because it has outstanding features, different from other services.

  • Integration experts: Mageplaza has many years of experience operating in the field of e-commerce and cooperates with many large businesses, so customers can completely trust the team of experts here.
  • Quality: Quality is the factor that Mageplaza always puts first. The services provided to customers have been thoroughly tested and apply the most advanced technology.
  • Quick turnaround time: Mageplaza always tries to serve customers as soon as possible and ensures the right schedule as requested by the customer.
  • Security: Coming to Mageplaza, you do not need to worry about security issues because all customer information is strictly confidential, avoiding information leaks.
  • Support: Mageplaza’s integrated services are supported for free for 2 months from the date of service use. In addition, experts here are always ready to answer any questions customers have.
  • Cost-effective plan: You will receive a public and reasonable price when using Mageplaza’s integrated services.

To increase customer experience when using, Mageplaza is providing free 1:1 consultations with experts. Customers will have their questions answered when using the service of integrating applications on the e-commerce platform and be given useful advice. 

In addition, Mageplaza also allows you to experience the service for free for 30 days. During that time, customers will see the advantages and evaluate whether this service suits their needs or not. From there, they can make better choices. 


Best practices for using Klarna on Shopify

Transparent payment with Klarna Shopify

Using Klarna effectively on Shopify involves a few best practices to ensure a seamless customer experience and optimal use of the service:

  • Clear communication: Ensure your customers know Klarna as a payment alternative. Clearly display Klarna’s various services (such as Pay Later and Slice It) and their benefits on your Shopify store. Give details on how these alternatives function and their terms.
  • Smooth integration: Check that the integration of Klarna with your Shopify store is smooth. It should be thoroughly tested to ensure that payment processing, order management, and refunds all work properly.
  • Transparency on costs and policies: Any additional fees or terms related to using Klarna should be communicated clearly. Be upfront about any potential interest rates or fees that may apply based on the Klarna service your consumers select.
  • Payment options and plans: Klarna provides various payment options, such as “Buy Now, Pay Later” and installment plans. Understand how these options will be presented to your customers during checkout. Ensure your consumers know the payment plans and the terms and conditions that go with them.
  • Checkout experience: Check that the checkout procedure is simple and that the Klarna payment alternatives are visible. Customers are more likely to complete their purchases when the checkout procedure is simple and user-friendly.
  • Sandbox mode: Test Klarna payments in a sandbox environment before going live to confirm all capabilities work as planned. This eliminates potential problems or inaccuracies when clients utilize Klarna for real-world transactions.
  • Customer support and information: Provide customer service for questions or concerns about using Klarna. Make it easy for customers to find information about Klarna’s services and policies on your website.
  • Regular updates and monitoring: Maintain the integration and app. Keep an eye on the functioning of Klarna payments on your Shopify site to handle any technical issues or modifications as soon as possible.
  • Opt for multiple Klarna services: If your business model allows it, provide numerous Klarna payment services. Offering alternatives such as Pay Later or Slice It can accommodate a variety of consumer preferences.
  • Compliance and security: Ensure your store complies with all payment processing and data security standards. Klarna offers safe payment methods, but you must also maintain a secure environment.

Following these best practices, you may efficiently use Klarna on your Shopify store, giving customers a convenient and flexible payment experience.

Alternatives to use Klarna on Shopify

Various online payments on Shopify


Stripe is an online payment processing platform that provides businesses with tools and APIs to conduct online transactions. It allows businesses to accept online payments, manage income, and handle financial operations. Key features and services provided by Stripe include:

  • Payment processing: Stripe enables businesses to accept credit and debit cards, digital wallets such as Apple Pay and Google Pay, ACH transfers, and other payment methods.
  • Customization and integration: It provides APIs and developer tools for integrating payment systems into websites and mobile apps. This allows organizations to adapt payment flows and develop personalized solutions for their requirements.
  • Subscription billing: Stripe enables businesses to set up and manage recurring payments for services or products using subscription-based billing models.
  • Fraud prevention: It offers tools and services such as machine learning-based fraud detection and prevention solutions to assist businesses in preventing and managing fraud.
  • Payouts and transfers: Stripe helps businesses manage their revenue efficiently, pay vendors or contractors, and handle transfers.
  • Reporting and analytics: It provides comprehensive reporting and analytics tools to help firms analyze and understand transaction data, customer behavior, and revenue patterns.

Stripe’s user-friendly design, numerous customization options, and robust security measures have made it popular among businesses of all sizes. It is commonly utilized to handle payment processing demands in e-commerce, subscription-based services, marketplaces, and other online enterprises.


PayPal is an online payment system that allows individuals and businesses to send and receive money electronically. It is one of the world’s most popular digital payment services. Here are a few essential points of this application:

  • Sending and receiving money: Users can send money to others by entering the email address associated with their PayPal account. It also enables the receipt of money, making transactions between individuals or businesses more convenient.
  • Online payments: PayPal is a popular payment method for internet purchases. It’s built into many e-commerce platforms, allowing users to pay for goods and services securely.
  • Cross-border transactions: It allows for cross-border and international payments in many currencies, making it attractive for worldwide trade.
  • Payment options: PayPal accepts credit and debit cards, bank transfers, and the PayPal balance as payment methods.
  • Security measures: PayPal protects users’ financial information and transactions with various security methods, including encryption, fraud prevention, and buyer/seller protection programs.
  • Business solutions: PayPal offers invoicing, payment processing, and online store checkout alternatives.
  • Peer-to-peer transfers: Users may send money directly to friends and family, making it an ideal venue for sharing expenses or providing gifts.
  • Mobile App: PayPal features a mobile app that is easy to use and enables quick access to accounts, transactions, and sending or receiving money while on the road.

PayPal is a versatile tool in the digital economy since it provides a convenient and safe means to manage a wide range of financial transactions for both personal and commercial use.


Another payment platform that people can use is Sezzle. It allows consumers to make purchases and pay for them over a series of interest-free installments, typically spread out over six weeks. The service is designed to provide an alternative to traditional credit cards and financing options, especially for consumers who may not have access to traditional credit.

Here’s how Sezzle generally works:

  • Selection of Items: Shoppers can choose Sezzle as a payment option when making a purchase from an online retailer that supports Sezzle.
  • Checkout: At the checkout, the total purchase amount is divided into multiple equal payments.
  • Payment schedule: The customer makes an initial payment at the time of purchase and then pays the remaining installments over the following weeks.
  • No interest (if paid on time): Sezzle typically does not charge interest on the payments if the customer pays on time. However, there may be fees for late payments.
  • Approval process: Sezzle may perform a soft credit check during the checkout process, but it’s often more lenient than a traditional credit check.
  • Promotions and offers: Sezzle may offer promotions or special deals to users, such as discounts or exclusive offers, depending on the partnership agreements with merchants.

Overall, Sezzle will also be a perfect application for paying customers who shop online. You can consider this as an alternative to Klarna Shopify.


Klarna online payment has become a popular method many use, making transactions faster and easier. Therefore, creating a good customer experience in payment methods will be extremely important to help your stores increase their competitive advantage over competitors in the market. 

This article has introduced you to integrating the Klarna payment application with the Shopify e-commerce platform and how to use it effectively. Klarna Shopify integration will increase your stores’ profits and satisfy customers with their shopping experiences.

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Marketing Manager of Mageplaza. Summer is attracted by new things. She loves writing, travelling and photography. Perceives herself as a part-time gymmer and a full-time dream chaser.
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