HSA/FSA Payments Simplified with Flex

An FSA (Flexible Spending Account) and an HSA (Health Savings Account) are tax-advantaged accounts for medical expenses but differ in key aspects. FSAs, employer-sponsored, allow employees to use pre-tax dollars for medical expenses such as prescriptions and copays, but typically feature a "use-it-or-lose-it" policy where funds must be used within the plan year. HSAs are available to those with a high-deductible health plan and offer more flexibility, allowing funds to roll over annually.

For more information, see Flex’s Comprehensive Guide to HSA/FSAs (opens in a new tab).

Select “Flex | Pay with HSA/FSA'' at checkout. Input your card details and checkout as usual.

If a purchase requires verification of eligibility, follow the steps to complete a brief telehealth consult via chat.

Like any credit or debit card, HSA/FSAs can be declined if any of the data from the card is incorrect (number, expiration date, zip code etc). Flex will alert you in checkout if any of these fields is missing or incorrect so you can update them.

The most common reason for rejection of the card is insufficient funds. Reach out to your HSA or FSA provider to verify the amount of money in your account before attempting to complete your purchase again.

Yes, you can still be reimbursed for the expense.

Select “Flex | Pay with HSA/FSA” at checkout. Instead of entering your HSA or FSA card, input your regular credit card.

Flex will email you an itemized receipt following your purchase. Submit the itemized receipt to your HSA or FSA provider for reimbursement.

Flex has partnered with instasmile to enable consumers to use their HSA/FSA funds. You can think of Flex as an alternative to payment method, similar to Affirm, Klarna etc.

Please use our contact form.

Please check your spam folder, as sometimes emails from notifications@withflex.com may be automatically filtered as spam by some email service providers. If you still can’t find it, please email support@withflex.com and let them know the email address associated with your order.