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Flex integrates with WooCommerce to enable merchants to accept Health Savings Account (HSA) and Flexible Spending Account (FSA) payments. Our plugin helps you tap into the growing $150 billion HSA/FSA market and makes it easy to offer compliant, seamless payment options to your customers.
Features:
- Accept HSA/FSA payments directly in your WooCommerce checkout flow
- Product sync and eligibility assistance
- IIAS support for products deemed “always eligible”
- Letter of Medical Necessity (LOMN) directly in checkout for products deemed “dual use”
Flex partners have seen:
- 20% increase in average order volume
- 17% increase in revenue
- Access to a $150 billion and growing HSA/FSA market
How to Get Started:
Visit withflex.com to learn more or contact us at hello@withflex.com to get started.
Screenshots

Accept HSA/FSA Payments: https://www.withflex.com/

Understand HSA/FSA payments as a growth channel in the Flex dashboard.

Customers are redirected to Flex to checkout securely using their HSA/FSA card.

Flex promotes your brand to engaged buyers looking to spend the $150B in HSA/FSA accounts.
Plugin Details
Active Installs
20Total Downloads
2,355Version
3.3.9Requires WP
6.7Requires PHP
8.1Tested Up To
7.0.4Added
2025-05-19Last Updated
2026-08-18 1:00am GMTRatings
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