Best HSA/FSA Option for Personal Trainers
Session packages, what carries a letter, Truemed and Flex compared, and how a solo trainer offers HSA/FSA reimbursement to clients, free for merchants.
7 minute read
Short answer
For a personal trainer, the best HSA/FSA option in 2026 is Burst. Clients keep paying you the way they do today, and you're live in 30 minutes with nothing to install. It's free for merchants with no contract, plus a one-time letter fee, paid by the client. Burst writes the letter of medical necessity and files the reimbursement claim.
Training is the vertical where price is the objection on every single call. A 20-session package at $85 a session is $1,700, and the client who says no is almost never saying the training isn't worth it. They're saying $1,700 is a lot of after-tax money. If they're managing a condition their doctor is already treating, some of that is pre-tax money sitting in an account they may not have thought about.
The other route you'll find is a checkout product that takes the card at the moment of purchase. Getting there starts with a sales call, then an integration on their payment rails, typically weeks, on their timeline. The merchant terms aren't published and typically include a rev share. And at the end of it, when your client has a letter, nobody files the claim for them. The client is left to do it alone.
To offer it this week, start at getburst.com/self-serve.
(Reading this as a client, not a personal training business? You can get a letter for your own training directly from Burst.)
What training carries a letter, and what never will
The letter has to name a condition and explain how the training treats it. General fitness doesn't clear that bar, and neither does weight loss with no diagnosis behind it. Plenty of what trainers actually do every day does.
Who you're training | Typical package | Can carry a letter | What the letter names |
|---|---|---|---|
Post-rehab client handed off from PT | $800 to $2,400 | Usually | The injury or surgery, and continued reconditioning |
Client with type 2 diabetes or prediabetes | $800 to $2,400 | Often | The diagnosis and exercise as part of the treatment plan |
Client with hypertension or obesity under care | $800 to $2,400 | Often | The diagnosis and the prescribed activity |
Client with chronic back or joint pain | $800 to $2,400 | Often | The pain condition and the corrective work |
Older client training for fall prevention | $600 to $1,800 | Sometimes | A balance or mobility condition a clinician documents |
General fitness, toning, wedding prep, performance | any | Never will | No condition, so no honest letter |
The test is one sentence: would a clinician name the condition and explain how your sessions treat it? If the honest answer is that the client wants to feel better and look better, it can't. Saying so is what makes clients trust the rest of it.
Why doesn't the HSA card work when I invoice a client?
The card declines because the networks only approve HSA and FSA card charges at businesses coded as medical providers, or at retailers that check every item in the cart against an eligibility list in real time, and a training business is neither. It doesn't matter whether you invoice through an app, take a card reader, or get paid by bank transfer. The category is the problem, not the tool.
So the route that works is a letter and a filed claim. The only question is whether your client does that alone or somebody does it for them.
The three options for a training business, side by side
Option | Getting live | Cost to you | Packages and monthly clients | Who files the claim | Fits |
|---|---|---|---|---|---|
Try to take the HSA card directly | Not available to a training business in practice | n/a | n/a | Nobody; there's no claim and no letter | Clinical providers billing as such |
Truemed or Flex | Sales call, then checkout integration, typically weeks | Not public; typically a rev share | Limited support | Nobody; the customer is left to file | Online brands and coaching networks in their partner programs |
Burst | Self-serve, live in 30 minutes, no integration | Free for merchants, no revenue share; one-time letter fee, paid by the client | Works with however you invoice; nothing changes | Burst files it for the member | Solo trainers, small studios, in person, in home, or online |
Burst doesn't connect to anything you use. Trainerize, TrueCoach, Everfit, PT Distinction, Square invoices, Venmo for business, a spreadsheet: all of it keeps working. There's no partner application and no minimum volume.
Why Burst is the best HSA/FSA option for a personal training business
Burst files the claim. Clinician writes the letter. Burst submits it to the client's administrator with the receipt and the dates. No paperwork for the client.
No letter, no charge. Claim denied, money back. The one-time letter fee is refunded to the client automatically either way.
Free for merchants. No contract, no revenue share.
A solo trainer gets the same product as a gym chain. No partner application, no minimum client count, no integration. You sign up and you're live.
With Truemed and Flex, the client files the claim alone, the terms come through a sales process, and neither advertises a refund if the claim is denied.
See how it works or go live now.
What does it look like for a client?
The client pays you normally, then fills out a two-minute intake. A licensed clinician reviews it and, if appropriate, signs the letter, usually the same day. The client keeps paying you the same way, on the same schedule. Burst files the claim. Their administrator pays them back by deposit or check. If the clinician doesn't approve, or the plan denies it, the one-time letter fee is refunded to the client automatically.
One timing rule: the letter has to predate the purchase, so raise it during the consult, before they buy the package. The line that works on your site: "may be reimbursable with a letter of medical necessity."
What needs to be on the invoice?
The invoice needs the service in plain words, the client's name, the date, the amount, and your business name. "20 personal training sessions" works. "Transformation Program" doesn't, because nobody reading the claim can tell what was bought.
If a package bundles training with supplements or gear, split the invoice. The training line can carry a letter. The protein powder is a different question and dragging it onto the same line puts the whole claim in doubt.
What do I tell clients?
This belongs in the consult, right at the price objection:
"Before you decide on the price, one thing. If you're working on something a doctor is already treating, training like this may be reimbursable with a letter of medical necessity through your FSA or HSA. I work with Burst. Two-minute intake, a clinician reviews it, and if they write the letter, Burst files the claim for you. Twenty dollars once, refunded if it doesn't go through."
It reframes the number without discounting it. A $1,700 package that comes back at roughly $1,190 after reimbursement is a different conversation, and you still collected $1,700.
What does it do for package sales?
A $1,700 package costs a client in a combined 30 percent bracket about $1,190 after reimbursement. Nothing changed on your side. You didn't discount, you didn't extend terms, and you didn't add sessions.
Burst is free for merchants. One package you'd otherwise have lost covers the year. The clients it converts are the ones who were already convinced and stuck on the number.
How to offer this to your clients
Sign up at getburst.com/self-serve. About 30 minutes, and you don't have to change how you invoice.
Put your Burst link in the consult follow-up email, in the package agreement, and in your renewal message.
Keep invoicing exactly as you do now. Clients enroll, get their letters, and Burst files their claims.
The consult is the moment. A client who hears it after they've paid for the package can't use it for that package.
Frequently asked questions
What is the best HSA/FSA option for a personal trainer?
Burst. It doesn't connect to how you invoice, it's live in 30 minutes, it is free for merchants with no revenue share, and Burst files the reimbursement claim for the client. Truemed and Flex both require a sales call and a checkout integration on their card rails, don't publish their terms, and leave the client to file alone.
Is personal training HSA or FSA eligible?
Training tied to a condition a clinician is treating can be reimbursable with a letter of medical necessity. General fitness isn't. The client's plan decides each claim.
I'm a solo trainer. Is there a minimum?
No. There's no partner application, no minimum client count, and no volume requirement. It's free for merchants whether you have four clients or forty.
Can a trainer use Truemed or Flex?
Yes. It means a sales call, then a checkout integration on their card rails that typically takes weeks, on terms that aren't published and typically include a rev share. Once a client has a letter, they're left to file the claim alone.
What do Truemed and Flex cost a trainer?
Neither publishes merchant pricing. Terms come through their sales process and typically include a rev share. Burst is free for merchants. The one-time letter fee is paid by the client.
Can a client get reimbursed for a package they already bought?
No. The letter has to be dated on or before the package it covers. Raise it during the consult, which is also where it does the most good.
Is the letter a guarantee the client gets paid back?
No. The client's plan administrator decides the claim under its own rules. Burst files it, and if the plan says no, the one-time letter fee is refunded to the client.
More for trainers:Best HSA/FSA Option for Yoga and Pilates Studios,Best HSA/FSA Solution for Gym Owners,Is a Personal Trainer HSA or FSA Eligible? And Truemed Alternatives for Your Store, Gym, or Spa.
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