PostFinance Checkout Flex

The flexible Payment Service Providing solution for your online shop

PostFinance Checkout Flex gives you a flexible and highly functional Payment Service Providing solution for your online shop. Payment methods can be integrated according to your needs.

PostFinance Checkout Flex: a flexible and simple solution for online shops

  • Enables the connection of all standard payment methods

  • Easy integration into your online shop with plug-ins

  • Modern and flexible integration with REST Web Services

  • Free testing in simulation mode

  • Digital onboarding including contract application to the acceptance partners selected by you

  • Simple and transparent pricing model

  • Set up the free test environment and the plug-in

    1. Register on The link will open in a new window PostFinance Checkout for the test version
    2. Set up the test version in the back office tool in just a few steps, select the desired payment methods and the corresponding acceptance partners. 
    3. Connect your shop with a suitable plug-in according to the supplied instructions or connect it to Checkout Flex with our REST Web Services or SDK (software development kit).
    4. Test all payment methods in simulation mode for 30 days

    Online contract conclusion and communication of the request to the acceptance partners

    The Payment Service Providing contract for Checkout Flex can be completed online in a few minutes. After our check, PostFinance Checkout Flex will be activated within 10 working days.

    To activate the payment methods, you need a separate contract with the respective acceptance partner for each payment method. PostFinance automatically arranges the contract request for you in Checkout Flex Onboarding. The amount of time it takes to activate the payment method depends on the respective acceptance partner and cannot be influenced by PostFinance.
    NB: Currently, the conclusion of contracts with SIX and Concardis may take up to several more weeks.

    Supported acceptance partners and payment methods

    • PostFinance (PostFinance Card and PostFinance E-Finance)
    • SIX (Visa, Mastercard, Amex)
    • Concardis (Visa, Mastercard)
    • PayPal (Visa, Mastercard)
    • PowerPay (MF group invoice)
    • TWINT
    • More upon request

    Paying with stored cards

    With this feature, as a retailer you have the option of debiting recurring amounts (such as for subscriptions) to the cards previously stored by the shopper.

    Payment link and charge flow

    • You can use the payment link to process transactions easily by sending the shopper a payment link via e-mail. The shopper clicks the link and settles the outstanding amount with one of the payment methods connected to the shop.
    • You can use the charge flow feature to automate processes for debits via e-mail.


    In the Checkout back office tool, you can personalize e-mails to the shopper (such as payment statuses) or documents (such as payment confirmations or credits).


    The revenue reports (reconciliations) of the various acceptance partners are displayed in consolidated form in the Checkout back office tool, can be exported via CSV and imported into your accounting software.

    Fraud management

    • Fraud checking for the card issuer BIN (Bank Identification Number), country, address and IP address
    • Blocking cards in selected countries
    • Filtering card categories. The filter is applied to the first 6 digits of the card that identify the issuer (based on the BIN range) and the card category
    • Filtering by card type controls whether filtering of the card type derived from the BIN range is active

    Keep an overview

    All transactions can be managed directly in the shop system. The back office tool also gives you access to details of the payment transactions, and you can manage your users and settings at all times. You also have the option of authorizing a partner (an agency, for example) to implement technical configurations.

    Advanced users can also customize the automatically preconfigured services and, if required, set up another shop (space) without additional costs.


    Our technical support is available if you have any questions about PostFinance Checkout.

  • Business account at PostFinance for billing of Checkout Flex fees (from 1 February 2021, a credit card can be entered for billing instead of a business account).

  • PostFinance plug-ins

    PostFinance Checkout offers plug-ins for the standard shop systems in Swiss e-commerce:

    • Magento 2
    • Magento 1
    • OpenCart
    • OXID
    • Prestashop
    • Shopware
    • WooCommerce

    Connected services − connecting PostFinance Checkout to SaaS shop systems

    If you use a shop system as an SaaS (software as a service) solution, you can connect PostFinance Checkout directly using the integrated connected services. PostFinance Checkout currently supports the following connections:

    Supported plug-ins from third-party providers

    The plug-ins and connected services offers are continually being expanded.

  • Test it free of charge

    Test PostFinance Checkout, including payment simulation and plug-in, free of charge and with no obligation.

    PostFinance Checkout Flex software

    • Software including plug-in: CHF 249. one-time, excl. VAT
    • Software licence for permanent updates: CHF 19.90 per month, excl. VAT

    The price of CHF 19.90 includes two spaces for setting up two shops. Each additional space costs CHF 6.90 per month excl. VAT.

    PostFinance Checkout Flex transaction fees

    CHF 0.18 per transaction, excl. VAT

    Fees for payment methods

    These fees are billed directly by the acceptance partner and not by PostFinance. Please check the relevant contract with your acceptance partner here.

This might interest you too