It's That Simple!

Your health savings account dollars work hard for you. Now use them directly at checkout — no reimbursement forms, no paperwork, no hassle.

  • PRE-TAX DOLLARS SAVINGS
    HSA and FSA funds are contributed before taxes, so you effectively get a discount on every eligible purchase.
  • USE YOUR EXISTING CARD
    Pay directly with your HSA or FSA debit card — no need to submit claims or wait for reimbursement.
  • GET ITEMIZED RECEIPTS
    Flex automatically sends an itemized receipt to your email for your records, ready for any audit.
  • QUALIFY AT CHECKOUT
    Get FSA/HSA approval on our site at checkout so you always know what qualifies.

Four Easy Steps to Checkout with HSA/FSA

  • 1. Add Products to Your Cart

    Shop as usual and add to cart – subscriptions not elgible.

  • 2. Select Flex at Checkout

    If you use a Shop account, you will need to select "Pay another way"

  • 3. Confirm Eligibility

    Complete the short survey to see if you qualify

  • 4. Enter Your HSA/FSA Card

    Enter your HSA or FSA details

Frequently Asked Questions

Still have questions? Browse the most common ones below, or reach out to our support team.

What is Flex, and why are you partnered with them?

Flex is the leading HSA/FSA payment platform trusted by hundreds of merchants nationwide. We partnered with Flex because they handle eligibility verification, receipt generation, and secure processing — so you get a seamless checkout experience without any extra steps on your end.

Which products on your site are FSA/HSA eligible?

Eligible items are reviewed against IRS guidelines and updated regularly. Confirm your product selection eligibility at checkout.

Can I use my HSA and FSA card like a regular debit card?

Yes. Your HSA and FSA cards work exactly like debit cards at checkout. Simply enter your card number, expiration date, and CVV when prompted.

What if my cart has both eligible and ineligible items?

No problem. Flex will apply your HSA/FSA funds only to the eligible portion of your order. Any remaining balance for ineligible items will be charged to a secondary payment method of your choice.

Will I get a receipt I can use for my records?

Yes. Immediately after your purchase, Flex will email you an itemized receipt. This document meets IRS documentation standards and can be used if your HSA/FSA administrator or the IRS requests proof of purchase.

Is my payment information secure?

Absolutely. Flex uses bank-grade encryption and is fully PCI-DSS compliant. Your card details are never stored on our servers and are processed through Flex's secure infrastructure.

What is the difference between HSA and FSA?

Both are pre-tax accounts for health expenses, but they differ in key ways. An HSA (Health Savings Account) is available only with a high-deductible health plan, and unused funds roll over year to year. An FSA (Flexible Spending Account) is offered by most employers regardless of health plan type, but typically has a "use it or lose it" policy at year's end. Both can be used here at checkout through Flex.

What if I have more questions or need help?

Our support team is here to help. Send us an email or reach out on our chat and we'll get back to you as quickly as possible. You can also visit Flex's help center at withflex.com

Your HSA/FSA card is ready to use. Your vitamins are waiting.

Shop Now & Pay with HSA/FSA