How much can I deduct for HSA contributions?
Estimate your HSA contribution limit, deductible personal contribution, remaining capacity, and possible excess contribution for 2025, 2026, or 2027 planning. The calculator uses current IRS self-only, family, and age-55 catch-up limits.
HSA deduction calculator
Quick answer
Your HSA deduction depends on eligible HDHP coverage, eligible months, employer contributions, age-55 catch-up eligibility, Medicare status, and dependent status.
Also answers
- HSA contribution limit calculator
- Form 8889 calculator
- HSA excess contribution calculator
- health savings account deduction
Good fit when
- HDHP participants
- People age 55 or older
- Checking excess HSA contributions
Have ready
- Tax year and coverage type
- Eligible months
- Employer and personal HSA contributions
Result you get
HSA limit, deductible personal contribution, remaining capacity, and excess contribution estimate.
How this calculation works
- Selects the self-only or family HSA limit for 2025, 2026, or 2027 planning.
- Adds the $1,000 age-55 catch-up amount when applicable.
- Prorates the limit by eligible months unless the last-month rule is selected.
- Subtracts employer contributions to estimate remaining personal deduction capacity.
- Flags excess contributions and an estimated 6% excise-tax exposure.
Common mistakes and caveats
- Medicare enrollment, non-HDHP coverage, or dependent status can eliminate eligibility.
- The last-month rule requires a testing period.
- Married-spouse HSA allocation rules can require separate Form 8889 calculations.
Last updated & sources
Last updated June 22, 2026.
TaxGuide Pro provides free state and federal tax calculators for individuals, freelancers, and small businesses.