HSA Mistakes to Avoid: Excess Contributions and Ineligible Expenses
Two categories of HSA errors generate the majority of IRS penalties and corrective tax filings: contributing more than the statutory annual limit and spending account funds on expenses that do not qualify under federal rules. Both error types are governed by the Internal Revenue Code and enforced through annual tax reporting, making accurate administration a compliance requirement rather than a best practice. This page covers how each mistake is defined, the mechanical process by which penalties attach, the scenarios most likely to trigger errors, and the rules that determine whether a correction is still available.
Definition and scope
An excess HSA contribution is any amount deposited into a Health Savings Account that exceeds the IRS-published annual contribution limit for the applicable coverage tier. For 2024, the IRS set the self-only HDHP limit at $4,150 and the family HDHP limit at $8,300, with a $1,000 catch-up allowance for account holders aged 55 or older (IRS Revenue Procedure 2023-23). Any dollar above those thresholds that remains in the account past the tax-filing deadline (including extensions) is subject to a 6% excise tax under IRC § 4973, applied annually for every year the excess persists.
An ineligible expense is a withdrawal used to pay for a product or service not defined as a "qualified medical expense" under IRC § 213(d) and further clarified in IRS Publication 502. A withdrawal for an ineligible expense is included in gross income and, for account holders under age 65, is subject to an additional 20% penalty tax (IRC § 223(f)(4)).
Both error types are distinct from ordinary HSA strategy questions. For broader regulatory context, the regulatory context for health savings page maps the statutory framework governing these accounts.
How it works
Excess contribution mechanics
- Contribution is deposited. The account holder, employer, or both contribute funds. All sources count against the same annual limit; employer contributions do not occupy a separate bucket.
- Limit is calculated. The allowable limit is prorated if the account holder was not HSA-eligible for all 12 months of the year, using the last-month rule or the actual-months method under IRC § 223(b)(2).
- Excess is identified. Total contributions minus the prorated limit equals the excess amount.
- Correction window. The excess, plus net income attributable to it, must be withdrawn by the tax-filing deadline (April 15, or October 15 with extension) to avoid the 6% excise tax. The withdrawn earnings are taxable but the excise tax does not attach.
- Penalty compounds. If the excess remains past the deadline, the 6% excise tax applies to the balance for that year and each subsequent year until correction. The taxpayer reports the excise tax on Form 5329. Detailed correction procedures are addressed on the excess contribution correction procedures page.
Ineligible expense mechanics
When an HSA debit card is used or a reimbursement is taken for a non-qualifying item, the account trustee does not block the transaction at the point of sale. The IRS reconciles eligibility through the account holder's own records and Form 8889 filed with their annual return. The account holder self-reports the distribution, includes it in gross income, and pays the 20% penalty unless a statutory exception applies (disability, death, or age 65 or older).
Common scenarios
Scenario 1: Mid-year loss of HDHP coverage. An account holder contributes the full annual self-only limit ($4,150 in 2024) in January but loses HDHP coverage in June. Under the actual-months method, only 6/12 of the annual limit is allowable — $2,075. The remaining $2,075 is excess and triggers the 6% excise tax if not withdrawn.
Scenario 2: Spouse's FSA disqualifies HSA contributions. A spouse enrolls in a general-purpose Flexible Spending Account. Under IRS rules, this disqualifies the other spouse from contributing to an HSA for the same period. Contributions made during that window are excess contributions. A limited-purpose FSA does not create this conflict, which is one of the primary reasons employers offer that variant.
Scenario 3: Over-the-counter cosmetic products. Cosmetic procedures and products that do not treat a diagnosed medical condition are not qualified expenses under IRS Publication 502. Sunscreen is qualified; anti-aging cream is not. Using HSA funds for the ineligible item triggers income inclusion and the 20% penalty.
Scenario 4: Gym membership. General fitness expenses are not qualified medical expenses unless a physician prescribes treatment for a specific diagnosed condition. Absent that documentation, the withdrawal is non-qualified.
Scenario 5: Medicare premiums vs. other insurance premiums. Medicare Part B, Part D, and Medicare Advantage premiums are qualified HSA expenses after age 65. Premiums for a standard employer-sponsored health plan generally are not, making this a frequent post-retirement error.
Decision boundaries
The following distinctions control whether a penalty applies:
| Situation | Tax Treatment |
|---|---|
| Excess withdrawn by filing deadline | Withdrawn earnings taxable; no excise tax |
| Excess remaining after deadline | 6% excise tax on excess, each year |
| Ineligible expense, age < 65 | Income inclusion + 20% penalty |
| Ineligible expense, age ≥ 65 | Income inclusion only; no 20% penalty |
| Qualified expense with adequate documentation | No tax, no penalty |
| HDHP coverage lost mid-year; testing period violated | Prorated limit applies; excess rules trigger |
The National Health Savings Authority home resource index provides navigation to related pages covering contribution limits, qualified expenses, and Medicare coordination. Account holders who enrolled under the last-month rule must maintain HDHP-eligible status through the following December 31 testing period, or contributions attributed to months of ineligibility become taxable and subject to a 10% additional tax under IRC § 223(b)(8).
Documentation is not optional. IRS Publication 969 states that account holders are responsible for saving receipts and records sufficient to demonstrate that each distribution was made for a qualified medical expense. Trustees report total distributions on Form 1099-SA but do not classify individual withdrawals as qualified or non-qualified — that burden rests entirely with the account holder.
References
- IRS Publication 502 — Medical and Dental Expenses
- IRS Publication 969 — Health Savings Accounts and Other Tax-Favored Health Plans
- IRS Revenue Procedure 2023-23 — 2024 HSA Contribution Limits
- IRC § 223 — Health Savings Accounts (Cornell LII)
- IRC § 4973 — Tax on Excess Contributions (Cornell LII)
- IRC § 213(d) — Medical Care Definition (Cornell LII)
- IRS Form 5329 — Additional Taxes on Qualified Plans
- IRS Form 1099-SA — Distributions from an HSA
- IRS Form 8889 — Health Savings Accounts
The law belongs to the people. Georgia v. Public.Resource.Org, 590 U.S. (2020)