Hammock vs Fidelity HSA: What's the Difference?

Short answer: Fidelity offers a traditional HSA with strong investment options and no account fees. Hammock is an HSA built for wellness spending — with a debit card and unlimited Letters of Medical Necessity included. If you want to use your HSA for gym, supplements, and massage, Hammock makes that possible. Fidelity doesn't.

What Is Fidelity HSA?

Fidelity is one of the most popular HSA providers in the country. They offer a no-fee HSA with access to Fidelity's full investment platform. You can invest your HSA funds in stocks, bonds, ETFs, and mutual funds — the same lineup available in a Fidelity brokerage account.

Fidelity's HSA is designed for traditional medical expenses and long-term investing. It's a great place to park HSA funds if you're treating your HSA as a retirement account.

What Is Hammock?

Hammock is an HSA designed for people who actually want to _use_ their HSA — not just invest it. Hammock gives you an HSA with a Mastercard debit card and unlimited Letters of Medical Necessity. That unlocks wellness spending: gym memberships, supplements, massage therapy, acupuncture, and more, all with pre-tax dollars.

Hammock also works for traditional medical expenses and supports FSA funds.

Feature Comparison

Feature	Hammock	Fidelity HSA
Annual fee	See website for current pricing	$0
Wellness spending	✅ Yes (gym, supplements, massage, etc.)	❌ No
LMNs included	✅ Unlimited	❌ Not available
Debit card	✅ Mastercard	✅ Debit card
Investment options	Competitive	Excellent (full Fidelity platform)
FSA support	✅ Yes	❌ No
Traditional medical	✅ Yes	✅ Yes
Best for	Active wellness spenders	Long-term investors

The Wellness Gap

This is the fundamental difference. Fidelity treats your HSA like a savings and investment account for medical expenses. It works great for doctor visits, prescriptions, and dental work. But try to pay for a gym membership or protein powder with your Fidelity HSA, and you'll get denied.

That's because the IRS requires a Letter of Medical Necessity (LMN) for wellness expenses to qualify as HSA-eligible. Fidelity doesn't provide LMNs and doesn't have a mechanism to support wellness spending.

Hammock was built specifically to solve this problem. Every Hammock membership includes unlimited LMNs, so your wellness purchases are automatically covered.

Investment Options

This is where Fidelity shines. If your primary goal is to max out your HSA contributions and invest for the long term, Fidelity's platform is hard to beat. You get access to thousands of investment options with no trading fees.

Hammock offers basic investment features, but it's not trying to compete with Fidelity on this front. Hammock is optimized for spending, not accumulating.

The Math: How Much Can You Save?

Let's say you spend $200/month on wellness — gym membership, a few supplements, and a monthly massage. That's $2,400/year.

Without Hammock, you pay for this with after-tax dollars. At a 30% combined tax rate, that $2,400 actually costs you about $3,430 in pre-tax income.

With Hammock, you pay with pre-tax HSA dollars. You save roughly $720 in taxes.

The more you spend on wellness, the more you save. And that's before considering that Fidelity's "free" HSA doesn't let you make these purchases at all.

Can You Use Both?

Yes. Some people keep a Fidelity HSA for long-term investing and use Hammock for day-to-day wellness spending. The IRS allows you to have multiple HSAs, and you can transfer funds between them.

A common strategy:

Contribute to your employer-linked HSA (which might be Fidelity)

Periodically transfer funds to Hammock for wellness spending

Keep the bulk of your long-term savings invested at Fidelity

Frequently Asked Questions

Is Fidelity HSA really free?

Yes, Fidelity charges no account fees, no investment fees (beyond fund expense ratios), and no minimum balance. It's one of the most cost-effective traditional HSAs available.

Can I transfer my Fidelity HSA to Hammock?

Yes. You can do a trustee-to-trustee transfer from Fidelity to Hammock. The process typically takes 2–4 weeks.

Does Hammock have investment options?

Hammock offers basic investment features for HSA funds you're not spending immediately. For serious long-term investing, Fidelity or a similar platform may be a better fit.

What if I don't spend much on wellness?

If you rarely use gyms, buy supplements, or get massages, Fidelity's free HSA is probably the better choice. Hammock's value comes from unlocking wellness spending — if you're not making those purchases, a traditional HSA may be simpler.

Can I use Hammock for doctor visits too?

Yes. Hammock is a full HSA that works for all qualified medical expenses — doctor visits, prescriptions, dental, vision, and everything else a traditional HSA covers.

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Ready to start using your HSA for wellness? Hammock includes unlimited Letters of Medical Necessity — so your gym, supplements, and massage are all tax-free.