What are the most common mistakes with health savings accounts (HSAs), and how do you avoid them?

By FastBuySale Newsroom · 5 Nov 2026 · 17m ago

Mistake 1: contributing when you are not an eligible individual

Common mistakes with health savings accounts (HSAs) tend to fall into four groups: contributing when you are not eligible, putting in more than the limit, spending the money on non-medical costs, and failing to keep receipts. Each one can trigger extra tax, but all are easy to avoid once you know the rules in IRS Publication 969.

An HSA is a tax-favoured account for people covered by a high deductible health plan (HDHP). For 2026, the Internal Revenue Service (IRS) says you can contribute up to $4,400 with self-only HDHP coverage or $8,750 with family coverage, plus an extra $1,000 if you are 55 or older at the end of the year. To qualify, a 2026 HDHP must have a minimum annual deductible of $1,700 for self-only or $3,400 for family coverage.

Only an eligible individual can contribute to an HSA. In practice that means you must be covered by an HDHP, generally have no other disqualifying health coverage, not be enrolled in Medicare, and not be claimable as a dependent on someone else's return. Publication 969 lists the conditions and the exceptions for coverage such as dental, vision and certain accident or disability insurance.

The plan itself must qualify. For 2026 the IRS table sets the HDHP minimum annual deductible at $1,700 for self-only and $3,400 for family coverage, and the maximum annual deductible plus other out-of-pocket expenses at $8,500 for self-only and $17,000 for family coverage. For family coverage, if either the family deductible or an individual family member's deductible is below the family minimum, the IRS says the plan doesn't qualify as an HDHP.

Medicare is a frequent trip-up. Once you enrol, you can no longer contribute, so people approaching that age should plan the timing of their last contributions. Check your enrolment date before you set up payroll contributions for the year.

Readers evaluating Health savings accounts should separate marketing claims from the actual rule text that governs their account or product. When two summaries disagree, the governing document or statute wins. If a rule depends on your age, filing status, or income band, re-check it when any of those facts change. Life events quietly move people across thresholds they last reviewed years earlier.

Educational explainers like this one cannot replace personalized advice for complex situations such as divorce orders, inherited accounts, or cross-border tax residency. Escalate those cases to a qualified professional. When in doubt about a number that changes every year, describe your plan qualitatively first, then look up the current official figure for the tax year you care about before you act.

Mistake 2: going over the contribution limit

The 2026 limits are $4,400 for self-only and $8,750 for family HDHP coverage. If you are 55 or older at the end of your tax year, your limit rises by $1,000. The IRS rules for married people apply when both spouses are eligible individuals, and if both are 55 or older and not on Medicare, each spouse's limit increases by the additional contribution; each spouse needs their own HSA to use it.

Employer contributions count toward the same limit. If your employer adds money to your HSA and you also contribute through payroll or directly, the total must stay within the cap. Contributions to an Archer MSA also reduce the amount you can put into an HSA.

Excess contributions are costly. The IRS says you generally must pay a 6% excise tax on excess contributions, figured on Form 5329, and the tax applies for each tax year the excess stays in the account. Withdrawing the excess and any earnings on it before your return's due date generally avoids that tax. A quick mid-year check of your payslip and HSA statement prevents the problem.

The last-month rule needs care too. If you become eligible late in the year and contribute the full annual amount under that rule, you must remain eligible during a testing period; otherwise the IRS says you must include in income the contributions that wouldn't have been made except for the last-month rule, and an additional 10% tax applies to that amount.

A useful habit is to write down your goal, time horizon, and cash buffer before you change any election related to Health savings accounts. Decisions made during a stressful week are the ones people reverse later at a cost. Educational explainers like this one cannot replace personalized advice for complex situations such as divorce orders, inherited accounts, or cross-border tax residency. Escalate those cases to a qualified professional.

Compare fees the same way you would compare two similar listings before you buy: look at what you pay each year, what you get, and whether a simpler option meets the same need. Readers evaluating Health savings accounts should separate marketing claims from the actual rule text that governs their account or product. When two summaries disagree, the governing document or statute wins.

Mistake 3: using HSA money for non-medical costs

HSA distributions are tax-free when used for qualified medical expenses you incur after you establish the HSA. If you withdraw for other reasons, the IRS says the amount is subject to income tax and may be subject to an additional 20% tax. Card payments count as distributions too, and your trustee reports them to you and the IRS on Form 1099-SA.

The additional tax has exceptions, including distributions after the account holder becomes disabled, reaches age 65, or dies, as described in Publication 969. Even then, non-medical withdrawals remain taxable income, so the account works best when kept for health costs.

You do not have to make withdrawals each year. Many savers pay smaller medical bills from current income and let the HSA balance carry forward, since unused funds stay in the account from year to year rather than being lost.

Keep digital and paper copies of confirmations after every change. Screenshots of election pages, email receipts, and year-end statements make tax season and job changes far less chaotic. Compare fees the same way you would compare two similar listings before you buy: look at what you pay each year, what you get, and whether a simpler option meets the same need.

Mistake 4: poor record-keeping and missed paperwork

Publication 969 says you must keep records sufficient to show that distributions were used exclusively for qualified medical expenses, that those expenses hadn't been paid or reimbursed from another source, and that you didn't take them as an itemized deduction. The IRS doesn't need the receipts with your return, but you need them if asked.

Every HSA holder who had contributions or distributions files Form 8889 with their return. That form reports contributions, calculates the deduction and works out any income and additional tax on distributions. Forgetting it is a common reason for IRS correspondence.

Beneficiaries matter as well. If your spouse is the designated beneficiary, the HSA is generally treated as their own after your death; if someone else is named, the account stops being an HSA and the value is generally taxable to that person. Review your beneficiary form whenever your family situation changes.

Plan your contributions with the budgeting tools at and browse more health and money explainers at and

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If a rule depends on your age, filing status, or income band, re-check it when any of those facts change. Life events quietly move people across thresholds they last reviewed years earlier. Automation helps. Calendar reminders for annual reviews, automatic transfers, and beneficiary checkups reduce the chance that a good plan dies from neglect.

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