You just learned about the HSA shoebox strategy. You understand the concept: pay medical expenses out of pocket, let your HSA grow tax-free, reimburse yourself later. The math makes sense. Now what?
Here is exactly what to do this week. Seven days, seven steps. By Sunday, you will have a working system.
Day 1: Check Your HSA Balance and Investment Options
Log into your HSA provider's website or app. Look at two things:
- Your current balance. How much do you have? Is any of it invested, or is it all sitting in cash?
- Your investment options. Most HSA providers offer a menu of mutual funds or ETFs once your cash balance exceeds a threshold (usually $1,000-$2,000). Look for a low-cost S&P 500 index fund or total market fund. If your provider's investment options are limited or expensive, make a note — you may want to transfer to a provider like Fidelity later.
If your entire HSA balance is in cash, you are earning close to nothing on it. That changes this week.
Day 2: Set Up Expense Tracking
The shoebox strategy only works if you keep records. Twenty years from now, when you want to reimburse yourself tax-free, you need to prove you paid a qualified medical expense today.
Sign up for HSA Tracker — it is free. Set up your profile and add any family members whose medical expenses you might pay (spouse, dependents). Every expense you track gets a timestamp, provider name, amount, and category — everything the IRS requires for substantiation.
No more paper receipts. No more shoeboxes. This is the digital version.
Day 3: Track Your First Expense
Do you have a recent medical expense? A copay from last week? A prescription you picked up? A dental cleaning bill sitting in your email?
Open HSA Tracker and add it. Upload a photo of the receipt or EOB. The AI will extract the key details — date, amount, provider, category — automatically. Review it, confirm it, and you are done. Thirty seconds.
That single expense is now a timestamped, documented record that you can reimburse from your HSA at any point in the future. Tax-free.
Day 4: Pay Your Next Medical Bill Out of Pocket
This is the shift. The next time you visit the doctor, fill a prescription, or get lab work done, do not use your HSA debit card.
Pay with your regular credit card, debit card, or bank account instead. Then log the expense in HSA Tracker.
Why? Because every dollar that stays in your HSA is a dollar that compounds tax-free. That $40 copay you just paid out of pocket could be worth $80+ in your HSA in ten years — and you can still reimburse the original $40 whenever you want.
Day 5: Backtrack Old Expenses
Here is where it gets interesting. Any qualified medical expense you paid out of pocket after your HSA was established is reimbursable — even if it happened months or years ago.
Search your email for EOBs (Explanation of Benefits) from your insurance company. Check your bank and credit card statements for payments to doctors, pharmacies, labs, and dentists. Pull up old receipts.
Every out-of-pocket medical expense you find is money you can withdraw from your HSA tax-free whenever you choose. Add each one to HSA Tracker with the original date and amount.
Many people find hundreds or even thousands of dollars in reimbursable expenses they never tracked. This is money that is already yours — you just need to document it.
Day 6: Set Your HSA to Invest
Go back to your HSA provider. Keep enough cash to cover your deductible or a few months of expected medical expenses (a common rule of thumb is $1,000-$2,000 in cash). Move everything above that threshold into an index fund.
A simple allocation that works for most people:
- 100% total market index fund or S&P 500 index fund if you have a long time horizon (10+ years to retirement)
- Target-date fund if you want a hands-off, age-appropriate allocation
The expense ratios matter. Look for funds under 0.10% if possible. Every basis point you save compounds over decades.
This is where the growth happens. Cash in an HSA earns maybe 0.01%. An index fund has historically returned 7-10% per year over long periods. The difference over 20 or 30 years is enormous.
Day 7: Tell a Friend
Seriously. The shoebox strategy is one of the most powerful tax strategies available to anyone with an HSA, and most people have never heard of it. Your coworkers, your siblings, your friends with high-deductible health plans — they are all leaving money on the table.
Be the person who changes someone's financial trajectory. A quick explanation over coffee or a forwarded link to this article is all it takes.
What Happens Next
After this first week, the shoebox strategy runs on autopilot. Every time you have a medical expense:
- Pay out of pocket
- Log it in HSA Tracker (30 seconds)
- Let your HSA keep compounding
When you are ready to reimburse — whether that is next year or in retirement — the proof is already there. Every expense documented. Every receipt saved. Every dollar accounted for.
Start your shoebox strategy today. Your future self will thank you.
This content is for educational purposes only and is not tax, legal, or financial advice. Consult a qualified tax professional for guidance specific to your situation.