HSA Contribution Limits: Catch-Up, HDHP Rules, and Penalties

The 2026 HSA contribution limits are $4,400 if you have self-only high deductible health plan coverage and $8,750 if you have family coverage.¹ Anyone 55 or older can add $1,000 on top. Those ceilings cover every dollar going into the account, whether from your paycheck, your employer, or a personal deposit. You have until April 15, 2027 to make contributions that count toward the 2026 tax year.²

Unlike IRAs, filing a tax extension does not extend the HSA contribution deadline. April 15 is firm. Your employer can still make prior-year contributions through that same date, but they have to notify both you and the HSA custodian that the deposit applies to 2026.

Catch-Up Contributions at Age 55

Starting in the calendar year you turn 55, you can contribute an extra $1,000 above the standard limit. Congress set that figure in statute and it does not adjust for inflation, so it has been $1,000 since HSAs were created.³ For someone 55 or older in 2026, the effective ceiling is $5,400 self-only or $9,750 family.

If both you and your spouse are 55 or older and neither is enrolled in Medicare, each of you gets a $1,000 catch-up, but each catch-up has to go into its own HSA in that spouse’s name.⁴ Couples on a single family plan often assume one joint account can hold both. It cannot.

What Counts as an HDHP in 2026

Your health plan has to hit specific thresholds to qualify as a high deductible health plan for HSA purposes. For 2026:¹

Minimum annual deductible: $1,700 self-only, $3,400 family
Maximum out-of-pocket: $8,500 self-only, $17,000 family

Out-of-pocket totals include deductibles and co-pays but not premiums. A plan with a deductible below the minimum, or with an out-of-pocket ceiling above the maximum, is not an HDHP, and you cannot contribute to an HSA while covered under it. Your plan documents or benefits administrator can confirm whether the plan qualifies.

Who Cannot Contribute

Eligibility is checked month by month. To count for a given month, you must be covered by an HDHP on the first day of that month, and you cannot have other coverage that duplicates what the HDHP covers.⁵ Several situations disqualify you:

Any Medicare enrollment. Once you are entitled to any part of Medicare, your contribution limit drops to zero for that month and every month after.
A general-purpose FSA held by you or your spouse. A limited-purpose FSA restricted to dental and vision is fine.
Non-HDHP secondary coverage, including a spouse’s traditional plan that covers you, or a Health Reimbursement Arrangement paying general medical costs.
Being claimed as a dependent on someone else’s tax return, even if you have your own HDHP and earn income.

The Medicare rule catches people who work past 65. If you apply for Medicare Part A after age 65, coverage backdates up to six months from your application date. Those retroactive months can turn ordinary HSA contributions into excess contributions. If you plan to keep contributing past 65, stop at least six months before you apply for Social Security or Medicare Part A.

The dependent rule creates a separate wrinkle. An adult child can stay on a parent’s health plan until 26 under the Affordable Care Act, but insurance coverage and tax-dependent status are different questions. An adult child who provides more than half of their own support is not a tax dependent and can open and contribute to their own HSA while still covered under the parent’s family HDHP.

Employer Contributions Count Toward Your Limit

Employer contributions are excluded from your taxable income, but they still count against the annual ceiling.⁶ Contributions made through a cafeteria plan by pre-tax payroll deduction are treated the same way. Your W-2 shows the total in Box 12 with code W.

The math is straightforward: annual limit minus employer contributions equals your remaining room. If your employer puts $2,000 into your account under family coverage in 2026, you can add up to $6,750 yourself. Setting up automatic payroll deductions at the start of the year without accounting for an employer match or seed deposit is one of the most common ways people accidentally overcontribute.

You also have a one-time option to roll funds from a traditional IRA into your HSA. The transfer counts toward that year’s contribution limit, so it does not create extra room, and you must stay HSA-eligible for a full 12 months after the rollover. Break that testing period and the rolled amount becomes taxable income with an added 10% penalty.

Partial-Year Coverage

If you weren’t covered by an HDHP for the whole year, the default rule is a pro-rata calculation: number of eligible months (counting the first of the month) divided by 12, times the annual limit.² Six months of self-only coverage in 2026 means a $2,200 limit.

The last-month rule offers an alternative. If you are HSA-eligible on December 1, 2026, the IRS treats you as eligible for all of 2026, and you can contribute the full annual limit regardless of when your HDHP coverage started. The condition: you must remain enrolled in a qualifying HDHP through December 31, 2027. If you drop coverage or pick up disqualifying coverage before that deadline, the amount you contributed above the pro-rata figure becomes taxable income and gets hit with a 10% additional tax.

Penalties for Going Over the Limit

Excess contributions carry a 6% excise tax for every year they sit in the account.² The tax compounds annually. Leave $1,000 of excess in the account for three years and you pay the 6% each year, not once.

You can avoid the penalty by withdrawing the excess plus any earnings on it before the tax filing deadline for that year, including extensions. For 2026 contributions, that means April 15, 2027, or October 15, 2027 if you filed an extension. The withdrawn earnings are taxed as ordinary income, but the 6% excise tax is waived.

Miss that window and the remedy is to under-contribute the following year. The IRS lets you absorb the prior year’s excess by reducing current-year contributions so the combined total stays under the limit. You still owe the 6% for the year the excess existed, but it stops accruing.

Penalty for Non-Medical Withdrawals

Pull money out of an HSA for anything other than qualified medical expenses before age 65 and you owe income tax on the withdrawal plus a 20% additional tax.⁵ On a $5,000 non-medical withdrawal in the 22% bracket, that combines to about $2,100 lost between tax and penalty.

The 20% additional tax goes away at age 65, at disability, or at death. After 65, non-medical withdrawals still count as ordinary income, but there is no penalty. Withdrawals for qualified medical expenses stay completely tax-free at any age. Qualified expenses follow Internal Revenue Code Section 213(d) and cover doctor visits, prescriptions, dental, vision, mental health care, medical equipment, and transportation for medical care.⁷ General wellness items like gym memberships and vitamins do not qualify.

Reporting on Your Tax Return

Anyone who contributed to an HSA, took a distribution, or failed a testing period during the year has to file Form 8889 with their federal return.⁸ The form reports contributions, calculates your deduction, and accounts for distributions. If you received any HSA distributions, Form 8889 is required even if you would otherwise have no reason to file.

If you owe the 6% excise tax on excess contributions, you also file Form 5329 to calculate that additional tax.² Your HSA custodian sends Form 5498-SA showing contributions and Form 1099-SA showing distributions; checking those against your own records before filing catches most problems before the IRS does.

1
Internal Revenue Service. Revenue Procedure 2025-19
2
Internal Revenue Service. Publication 969 – Health Savings Accounts and Other Tax-Favored Health Plans
3
Internal Revenue Service. HSA Contribution Limits
4
Internal Revenue Service. HSA Limits on Contributions
5
Office of the Law Revision Counsel. 26 USC 223 – Health Savings Accounts
6
Internal Revenue Service. HSA Contributions
7
Internal Revenue Service. Publication 502 – Medical and Dental Expenses
8
Internal Revenue Service. 2025 Instructions for Form 8889