Most HSA mistakes are easy to fix if you catch them in time. A short year-end review takes about half an hour and can save you hundreds — sometimes thousands — in taxes, missed contributions, or compliance headaches. Here's the eight-item checklist worth running every December.
1. Confirm You're On Track to Max Contributions
Log into your HSA portal and check your year-to-date contributions. For 2026, the limits are $4,400 self-only and $8,750 family, plus a $1,000 catch-up at 55+. If you're behind, you have two ways to catch up:
- Adjust the remaining payroll contributions before year-end (best — you also get the 7.65% FICA savings)
- Make a personal contribution from your bank account up until April 15, 2027 (still deductible, but no FICA savings)
Full numbers in the 2026 contribution limits guide.
2. Verify Your Employer Contributions
If your employer contributes, those count against your annual limit. Check that the deposits have actually arrived (some employers fund quarterly or annually). If you've inadvertently exceeded the limit because of an unexpected employer deposit, you have until your tax filing deadline to withdraw the excess plus earnings — otherwise you'll owe a 6% excise tax for every year it sits there.
3. Review Your Investment Allocation
If your HSA balance is parked in cash, you're leaving most of the value of the account on the table. The end of the year is a good time to:
- Move idle cash into a low-cost index fund (most custodians have a $1,000-or-so threshold)
- Rebalance if any single position has drifted more than 5% from your target allocation
- Review the expense ratios — some HSA-specific funds charge much more than equivalent index funds at Fidelity or Vanguard
If your custodian's investment options are bad, end of year is a fine time to roll over to a better one. See our top HSA investment providers ranking.
4. Update Your Beneficiary
This takes two minutes. Log in, click "beneficiaries," and confirm the name and percentages are right. If you've gotten married, divorced, had a child, or had a parent named who has since passed away, update accordingly. Without a designated beneficiary, your HSA gets dragged through probate and taxed as ordinary income to your estate.
5. Organize the Year's Receipts
Every receipt for a qualified medical expense — even one you paid out of pocket and don't plan to reimburse for years — is potentially worth tax-free dollars later. By December 31, every receipt from the year should be:
- Digital and stored in the cloud (paper rots, fades, gets lost)
- Tagged or filed by year, patient, and category
- Backed up in a second location
See HSA receipt storage tips and simple receipt organization.
6. Use Your FSA First (If You Have Both)
If you have a Limited Purpose FSA alongside your HSA, the FSA money is generally use-it-or-lose-it. Before December 31, schedule any planned dental, vision, or other LPFSA-eligible expenses to drain that account. The HSA balance rolls over forever — the FSA usually doesn't.
7. Reconcile Distributions and Plan for Form 8889
Pull your year's HSA distribution statements (you'll get a 1099-SA in January). Match every withdrawal to a qualified medical expense. If you accidentally took a non-qualified distribution, you can return it before the tax deadline as long as it was a "mistaken distribution" — better to catch it now than during audit. Walkthrough: HSA Form 8889 guide.
8. Plan Next Year
Open enrollment usually wraps in November or early December. While the timing is fresh:
- Confirm next year's plan still qualifies as an HDHP (the IRS deductible/OOP-max thresholds change each year)
- If you're approaching age 65 and considering Medicare, plan to stop HSA contributions at least six months before applying — Medicare Part A enrollment is backdated up to six months once you sign up for Social Security
- Adjust per-paycheck contributions for next year's limits so you hit the max with steady deposits
The 30-Minute Version
- Open HSA portal
- Check YTD contributions vs. limit (5 min)
- Move idle cash to investments (5 min)
- Update beneficiary (2 min)
- Confirm receipts are saved digitally (10 min)
- Check FSA balance and burn it down if needed (5 min)
- Note next year's contribution per paycheck (3 min)
The Bottom Line
A 30-minute year-end review prevents most of the common HSA mistakes and keeps your account on track for the long game. Pair it with the shoebox strategy and a real retirement-account treatment of the HSA, and December 31 becomes an easy deadline to hit, not a stressful one.