Finance

HSA Contribution Limit Calculator (2026)

Q: What is the HSA contribution limit for 2026?

**$4,400** for self-only HDHP coverage and **$8,750** for family coverage. If you are **55 or older**, you can add a **$1,000** catch-up contribution on top.

Q: How is the HSA limit prorated?

It is based on the **months you had qualifying HDHP coverage** on the first day of the month. Multiply the annual limit by **eligible months ÷ 12**. Six months of self-only coverage gives a $2,200 limit ($4,400 × 6/12).

Q: Do employer contributions count against my limit?

Yes. Employer and payroll contributions **count toward** your annual limit. This calculator subtracts the employer amount to show how much **you** can still add without over-contributing.

Q: What is the HSA last-month rule?

If you are **HSA-eligible on December 1, 2026**, you may contribute the **full year's limit** even if you weren't covered earlier. But you must stay eligible for **all of 2027**, or the extra becomes taxable income plus a **10% penalty**.

Q: How much is the catch-up contribution?

**$1,000** for account holders **age 55 or older**, unchanged for 2026. Each spouse's catch-up must go into their **own** HSA, so a couple both 55+ can contribute $2,000 in catch-up across two accounts.

Q: What happens if I contribute too much?

Excess contributions are hit with a **6% excise tax** for each year they remain in the account. Withdraw the excess (and its earnings) before your tax deadline to avoid the penalty.

Q: Can I still contribute to an HSA after enrolling in Medicare?

No. Once you enroll in **Medicare** you are no longer HSA-eligible, and your limit is **prorated** to the months before enrollment. Contributing after Medicare starts can trigger penalties.

Find your 2026 HSA contribution limit: $4,400 self-only / $8,750 family, plus the $1,000 age-55 catch-up, prorated by your eligible months and net of any employer contribution. Includes the last-month rule.

Data verified · July 2026
Edited by Martín Rodríguez
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Data updated: Jan 1, 2026 · Source: IRS — Rev. Proc. 2025-19

Edited by: Martín Rodríguez (editorial policy )

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A Health Savings Account (HSA) offers a rare triple tax break — deductible contributions, tax-free growth, and tax-free withdrawals for medical costs — but only up to the IRS annual limit. For 2026 (IRS Rev. Proc. 2025-19), the limits are $4,400 for self-only HDHP coverage and $8,750 for family coverage, plus a $1,000 catch-up if you are 55 or older.

Most people are not eligible for all 12 months, so the limit is prorated by the number of months you were covered by a qualifying high-deductible health plan (HDHP) on the first day of the month. Employer contributions count against your limit, so this tool subtracts them to show how much you can still add.

Enter your coverage type, eligible months, whether you are 55+, and any employer contribution to see your 2026 limit and remaining room.

When to use this calculator

Find your 2026 HSA contribution limit.
Prorate your limit for a mid-year HDHP start.
See how much you can add after employer contributions.
Include the $1,000 catch-up if you're 55+.
Compare self-only vs family contribution limits.
Plan payroll HSA deductions to hit the max.
Check the last-month rule for a late-year start.
Avoid over-contributing and the 6% excise tax.

2026 HSA and HDHP limits (IRS Rev. Proc. 2025-19)

Item	Self-only	Family
HSA contribution limit	$4,400	$8,750
Catch-up (age 55+)	+$1,000	+$1,000
HDHP minimum deductible	$1,700	$3,400
HDHP max out-of-pocket	$8,500	$17,000

Source: IRS Rev. Proc. 2025-19. HSA contribution limits are prorated by eligible months unless the last-month rule applies. Each spouse's catch-up must go into their own HSA.

How it works

How the 2026 HSA limit works

Base limit   = $4,400 (self-only) or $8,750 (family)
Catch-up     = $1,000 if age 55+
Proration    = (base + catch-up) × eligible months ÷ 12
You can add  = prorated limit − employer contributions

You are HSA-eligible for a month if you have qualifying HDHP coverage on the first day of that month and no disqualifying coverage (like general-purpose FSA or Medicare). The 2026 HDHP minimums: deductible at least $1,700 self-only / $3,400 family, with out-of-pocket maximums of $8,500 / $17,000.

2026 limits at a glance

Coverage	Base limit	With 55+ catch-up
Self-only	$4,400	$5,400
Family	$8,750	$9,750

Proration example

If you start self-only HDHP coverage on July 1, you are eligible for 6 months: $4,400 × 6/12 = $2,200. The $1,000 catch-up is prorated the same way unless the last-month rule applies.

The last-month rule

If you are HSA-eligible on December 1, 2026, you may contribute the full annual limit for 2026 even if you were not covered earlier in the year. The catch: you must remain HSA-eligible for all of 2027 (the 'testing period'). Fail that and the extra contribution becomes taxable income plus a 10% penalty.

Spouses and catch-up

Each spouse's $1,000 catch-up must go into their own HSA — you cannot combine both catch-ups in one account. A married couple with family coverage where both are 55+ can therefore add $2,000 in total catch-up across two accounts.

Avoid over-contributing

Contributions above your limit face a 6% excise tax each year until withdrawn. Use this tool before maxing out, especially if you changed jobs, coverage, or enrolled in Medicare mid-year.

Disclaimer

Educational estimate using 2026 IRS limits. It does not verify HDHP eligibility, Medicare enrollment, or FSA conflicts. Confirm your eligible months and the last-month rule with your plan and a tax professional before contributing.

Example: family coverage, all 12 months, age 55+, $1,000 employer contribution

Family base limit = $8,750.

Age 55+ catch-up = $1,000 → total limit $9,750.

Eligible all 12 months, so no proration.

Employer already added $1,000, so you can contribute $8,750 more.

Limit $9,750; you can add $8,750

Frequently asked questions

What is the HSA contribution limit for 2026?

$4,400 for self-only HDHP coverage and $8,750 for family coverage. If you are 55 or older, you can add a $1,000 catch-up contribution on top.

How is the HSA limit prorated?

It is based on the months you had qualifying HDHP coverage on the first day of the month. Multiply the annual limit by eligible months ÷ 12. Six months of self-only coverage gives a $2,200 limit ($4,400 × 6/12).

Do employer contributions count against my limit?

Yes. Employer and payroll contributions count toward your annual limit. This calculator subtracts the employer amount to show how much you can still add without over-contributing.

What is the HSA last-month rule?

If you are HSA-eligible on December 1, 2026, you may contribute the full year's limit even if you weren't covered earlier. But you must stay eligible for all of 2027, or the extra becomes taxable income plus a 10% penalty.

How much is the catch-up contribution?

$1,000 for account holders age 55 or older, unchanged for 2026. Each spouse's catch-up must go into their own HSA, so a couple both 55+ can contribute $2,000 in catch-up across two accounts.

What are the 2026 HDHP requirements?

To be HSA-eligible in 2026, your plan needs a minimum deductible of $1,700 (self-only) / $3,400 (family) and out-of-pocket maximums no higher than $8,500 / $17,000.

What happens if I contribute too much?

Excess contributions are hit with a 6% excise tax for each year they remain in the account. Withdraw the excess (and its earnings) before your tax deadline to avoid the penalty.

Can I still contribute to an HSA after enrolling in Medicare?

No. Once you enroll in Medicare you are no longer HSA-eligible, and your limit is prorated to the months before enrollment. Contributing after Medicare starts can trigger penalties.

Sources & references

Methodology & trust

Editorial

Finance calculator with its formula verified automatically against IRS — Rev. Proc. 2025-19 (2026 HSA and HDHP inflation-adjusted amounts), per our editorial policy and methodology.

Updates

Updated: July 2026. Parameters are verified periodically against the cited sources.

Privacy

Calculations run 100% in your browser. We do not store or transmit your data.

Limitations

Indicative results. For critical decisions, consult a professional.

📌 How to cite this calculator

Rodríguez, M. (2026). HSA Contribution Limit Calculator (2026). Hacé Cuentas. https://hacecuentas.com/en/hsa-contribution-limit-2026-calculator

Content licensed under CC-BY 4.0 — reuse it citing the source with a link to Hacé Cuentas.

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