Should You Pay for Root Canal with Your HSA - or Invest and Reimburse Later?
A root canal treats infection inside a tooth by removing the nerve and pulp. It saves the natural tooth and eliminates pain from infection or decay.
Root Canal typically costs $1,100
Range: $700 – $1,500. Here's how each strategy plays out.
Side-by-Side Comparison
| Pay with HSA Now | Pay Cash, Reimburse Later | |
|---|---|---|
| Out-of-pocket today | $0 | $1,100 |
| HSA balance impact | -$1,100 | No change |
| Tax savings | $330 (immediate) | $330 (when you reimburse) |
| HSA value in 10 years | $0 from this expense | +$1,064 in growth |
| HSA value in 20 years | $0 | +$3,157 in growth |
The Verdict
For a $1,100 expense like Root Canal, the shoebox strategy wins if you can afford to pay out of pocket. By keeping that $1,100 invested in your HSA at 7% annual returns, you could earn an additional $1,064 over 10 years or $3,157 over 20 years - all tax-free.
You still get the same $330 tax deduction either way. The only difference is when you take it. Meanwhile, your HSA money compounds untouched.
Key Assumptions
7% annual return
Based on historical stock market average returns
30% combined tax rate
Federal + state income tax + FICA
Compounding annually
Actual returns will vary year to year
When to Pay with Your HSA Instead
The shoebox strategy is not for everyone. Paying directly with your HSA makes more sense when:
- You do not have cash on hand. If paying $1,100 out of pocket would strain your budget or emergency fund, use your HSA. That is what it is for.
- The amount is small. For expenses under $200-300, the potential investment growth may not be worth the effort of saving receipts and tracking reimbursements.
- You need the money now. If you are facing a financial emergency or carrying high-interest debt, preserving cash by using your HSA is the smarter move.
- You are not investing your HSA. The shoebox strategy only works if your HSA is invested. Money sitting in a savings account earning 0.1% does not benefit from deferral.
Frequently Asked Questions
Is a root canal HSA-eligible?
Yes. Root canals are qualified dental expenses. The procedure, crown, and any follow-up visits all qualify.
Can I use my HSA for both the root canal and the crown?
Yes. Both the root canal procedure and the dental crown placed afterward are HSA-eligible expenses.
How much could I gain by deferring $1,100 in reimbursement?
At 7% annual returns, $1,100 invested for 10 years grows to about $2,163 - a gain of roughly $1,063.
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This comparison is for informational purposes only. Actual costs, returns, and tax savings will vary based on your individual situation. Consult a tax advisor for personalized guidance. Cost estimates are based on national averages as of 2026.
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