Flex offers a hosted checkout page to integrate HSA/FSA payments directly in your existing payments flow. Flex offers two paths to accept HSA/FSA cards at checkout.

​
Auto Substantiation

If you are an ecommerce store selling HSA/FSA eligible items, you are required by the IRS to use an Inventory Information Approval System (IIAS). This system must auto-substantiate HSA/FSA transactions at the point of sale in order for consumers to use their HSA/FSA cards. Flex offers this system for our merchants.

​
Letter of Medical Necessity

If you are a wellness business (fitness, nutrition, sleep, etc), your product or service may not be explicitly eligible by the IRS. Consumers must receive a Letter of Medical Necessity from a physician deeming your product medically necessary before you can accept HSA/FSA funds. Flex is able to issue a Letter of Medical Necessity directly in the checkout flow, providing a seamless and compliant checkout experience for your users.

​
Integration

Flex provides an API based integration, a Shopify payments app, and a WooCommerce plugin, making it easy to get started!