# Make HSA/FSA payments your next revenue driver Increase AOV by 50% and checkout conversion by 30% with the only HSA/FSA payments infrastructure built for top health and wellness brands. Flex is trusted by thousands of leading brands across the health and wellness industry ## Transform checkout. Drive more revenue. See what leading brands achieve by accepting HSA/FSA payments with Flex. ### CONVERSION LIFT +30% More shoppers complete checkout with HSA/FSA ### HIGHER AOV +50% Customers spend more using health benefit funds ### FEWER RETURNS -10% Fewer returns when buyers use pre-tax dollars ### REPEAT BUYERS 92% Of customers said they'll return because of HSA/FSA ## Your all-in-one HSA/FSA payments infrastructure Everything you need to accept HSA and FSA payments and support complex enterprise operations at scale. ### HSA/FSA Payment Not enough HSA/FSA funds? Split your payment. ``` 1234 1234 1234 1234 MM / YY CVV ``` ### Pay with HSA/FSA ### Seamless HSA/FSA Payments Accept HSA/FSA payments in-app or on your website. Flex handles the complexity and compliance for your business. ### Let's see if you qualify for a Letter of Medical Necessity! What's your DOB? ``` 03/09/1990 ``` What conditions are you seeking treatment for? Select all that apply. - Heart Disease - Anxiety ### Your Answer ### Simplified HSA/FSA Eligibility Manage HSA/FSA eligibility before and after purchase, with physician-reviewed Letters of Medical Necessity when required. ### Subscriptions Unlock recurring HSA/FSA revenue with subscription payments. ### Split Payments Let customers split HSA/FSA payments with another method. ### Off-Session Payments Save payment methods for seamless future charges. ### Reimbursements Enable customers to easily submit HSA/FSA reimbursements. ### Advanced Analytics Track HSA/FSA performance to understand customer behavior and drive more revenue. ### Streamlined Reporting & Exports Generate HSA/FSA reports to track performance, reconcile transactions, and drive decisions. Equinox at our core has always had a focus on preventive health and longevity. This is why we're excited about our partnership with Flex, which supports healthcare-aligned services without compromising the member experience. **Parinda Muley** Strategy & Commercial Leader ## Flexible integration for modern e-commerce Integrate Flex into your existing stack, support complex operations, and unlock new revenue with HSA/FSA payments. ``` curl --request POST \ --url https://api.withflex.com/v1/checkout/sessions \ --header 'Authorization: Bearer ' \ --header 'Content-Type: application/json' \ --data '{ \ "checkout_session": {\ "allow_promotion_codes": true,\ "line_items": [\ {\ "price": ",\ ``` ### API-first and fully customizable Flex integrates seamlessly with your tech stack, from custom checkouts to Shopify. Our HSA/FSA payments infrastructure adapts to how you sell. ### Built for enterprise scale Handle high SKU counts, large transaction volumes, and evolving business models with infrastructure designed for enterprise brands. ### Fast, reliable implementation Get up and running quickly with clear docs and a proven integration process. ### Hands-on support Support for your team and your customers, from integration to ongoing operations. ### A new revenue channel Flex connects you to high-intent HSA/FSA customers to drive new revenue. ## Integrate with any checkout or payment system Flex works with your existing checkout and payment systems, so you can start accepting HSA/FSA with ease. ## See why leading brands choose Flex See how health and wellness brands are unlocking new revenue with HSA/FSA through Flex. “Flex empowers our customers to invest in fitness using their HSA/FSA funds.” **Michael Maas** Chief Sales Officer “Our partnership with Flex helps make holistic wellness more accessible to everyone.” **Natasha Trindall** General Manager “We chose Flex because it offers the most comprehensive solution for enabling HSA/FSA payments.” **Lisa Thorson** Director Regulatory Affairs “Flex improved our conversion rate and added trust at checkout.” **Raechelle Hoki** VP of Marketing “Since the launch of this collaboration, we've seen a notable increase in HSA/FSA transactions, driving both customer satisfaction and revenue growth.” **Forrest Smith** CEO and Co-founder “Flex helps make cutting-edge fitness more affordable and accessible.” **Ulrich Dempfle** Co-founder ## Flex HSA/FSA payments frequently asked questions Find answers about accepting HSA and FSA payments, and how Flex helps grow your business. ### How does HSA and FSA payment processing work? ### Is the process to accept HSA & FSA card payments the same as other payment methods? ### Is my business eligible to accept HSA & FSA payments? ### Do Flex HSA/FSA payments adhere to the IRS guidelines? ### Do I need a different tool to provide Letters of Medical Necessity to my customers at checkout? ### What if my customer wants to split their purchase between their HSA/FSA card and a credit or debit card? ### Can Flex HSA/FSA payments handle subscriptions and memberships? ### Does the Flex HSA/FSA checkout integration work with coupons and promotions? ### Does Flex integrate with any ecommerce website? ### Does Flex offer an API for integrating HSA/FSA payments into my checkout? ### How do I get started accepting HSA/FSA payments? ## Start accepting HSA/FSA payments to drive more revenue - Identify if you need payments or reimbursements - See how Flex looks in your checkout flow - Easily integrate Flex with no changes to your stack [Get Started](/content/contact/index.html)