A Health Savings Account has an annual contribution limit set by the IRS. The cap depends mainly on whether your HSA-eligible coverage is self-only or family, plus a catch-up amount if you are 55 or older. Employer deposits count toward the same ceiling. This page explains the structure; dollar amounts change most years—confirm the current figures on IRS.gov (Publication 969) before you set payroll deferrals.
HSA vs FSA basics: HSA and FSA basics. Eligibility hinges on an HSA-eligible HDHP. Investing surplus after the deductible cushion: HSA investing. Treating the account as long-term healthcare savings: Using an HSA for retirement healthcare.
The limit you actually care about
| Rule piece | What it means |
|---|---|
| Self-only vs family | Your HDHP coverage tier for the year drives which IRS cap applies |
| Combined ceiling | Your contributions + employer contributions + any other deposits ≤ the annual limit |
| Catch-up (55+) | Extra amount allowed if you are age 55 or older (per eligible person rules) |
| Pro-rata / last-month | Mid-year HDHP starts/stops can change how much you may contribute—IRS timing rules apply |
| Excess contributions | Over-funding can mean tax + penalty until corrected |
Do not copy a friend’s payroll number. Their employer seed, family tier, or age may differ.
Self-only vs family (plain language)
- Self-only: You have qualifying HDHP coverage for yourself only → use the IRS self-only HSA limit for that year.
- Family: You have qualifying HDHP coverage that includes at least one other person → use the higher IRS family HSA limit for that year.
Family limit is about the HDHP coverage tier, not whether you file taxes jointly. A single parent on a family HDHP generally uses the family HSA cap; a married person on self-only HDHP generally uses the self-only cap (spouse may have a separate HSA if separately eligible—confirm current IRS rules for married couples).
Worked example: employer seed counts
Sam has family HDHP coverage. The IRS family HSA limit for the year is $L (look up the live number). Employer auto-deposits $1,000 into Sam’s HSA at Fidelity.
| Source | Amount |
|---|---|
| Employer seed | $1,000 |
| Max Sam should plan to add | $L − $1,000 |
| If Sam’s payroll is set to contribute $L ignoring the seed | Excess risk |
Sam sets payroll so employee + employer ≤ $L, then rechecks at open enrollment and after any mid-year coverage change. Tax forms and Form 8889 show up at filing time—see Filing taxes for beginners.
Catch-up, FSAs, and other traps
- Age 55+ catch-up: Allowed on top of the standard limit when you qualify; spouses each need their own eligibility path for their own catch-up—do not assume one HSA can hold two catch-ups without reading current rules.
- General-purpose health FSA usually blocks HSA eligibility; limited-purpose (dental/vision) FSAs are the common exception—see FSA rules.
- Medicare enrollment generally ends HSA contribution eligibility going forward—even if an HDHP is still on paper.
- Qualified funding distributions from IRA to HSA have one-time / limit interactions—treat as a tax project, not a casual transfer.
Deductible and out-of-pocket design still sits in Health insurance deductibles; the contribution limit is separate from how fast you spend the balance on care.
Checklist
- Confirm the plan is HSA-eligible on the SBC (not just labeled “HDHP”).
- Look up this year’s IRS self-only and family limits on IRS.gov.
- Subtract employer contributions before setting payroll deferrals.
- Add catch-up only if you meet the age and eligibility rules.
- Recheck after mid-year hire, marriage, divorce, or plan changes.
- Fix excess contributions promptly using IRS correction procedures.
When you can still fund last year’s HSA limit (filing-deadline deposits): HSA contribution deadline basics.
Educational only. Not tax, legal, or medical advice. HSA contribution limits, catch-up rules, and eligibility change by year; verify IRS.gov Publication 969 and your plan documents for the current tax year.