Example result based on the prefilled values.
Projected HSA Balance
$150,122.00
Annual Tax Savings
$847.00
Total Tax Savings
$16,940.00
After-Tax Cost of Contribution
$3,003.00
2024 Contribution Limit
$4,150.00
Continue your plan
Useful next calculations
When to use this calculator
- Before choosing between saving, investing, or increasing your monthly contribution.
- When you want to compare best-case, base-case, and cautious return assumptions.
- When you need a quick projection before making a longer-term portfolio decision.
- When you are deciding how many more years of contributions are needed to reach a specific target balance.
- When you want to see whether starting earlier versus contributing more each month produces a bigger outcome.
A realistic US planning example
Use these sample inputs as a quick scenario test, then change one variable at a time to compare outcomes.
Coverage Type
Self-only (individual)
Your Age
35
Annual HSA Contribution ($)
$250 per month
Employer Annual Contribution ($)
$250 per month
After entering these figures, review projected hsa balance, annual tax savings and total tax savings together rather than in isolation — each metric tells a different part of the story. Then rerun the tool with one input adjusted to see which variable has the biggest effect on all three outputs before you settle on a plan.
How to read your results
Projected HSA Balance
Use this metric to compare scenarios side by side and understand how changes in the key inputs drive the final outcome. If the figure surprises you, isolate one variable at a time and rerun the calculation to identify which assumption is responsible.
Annual Tax Savings
Review this figure alongside gross income and the local tax rules that apply to you. It is a planning estimate, not a filing result or a recommendation to make a tax decision.
Total Tax Savings
Review this figure alongside gross income and the local tax rules that apply to you. It is a planning estimate, not a filing result or a recommendation to make a tax decision.
After-Tax Cost of Contribution
Review this figure alongside gross income and the local tax rules that apply to you. It is a planning estimate, not a filing result or a recommendation to make a tax decision.
2024 Contribution Limit
Use this metric to compare scenarios side by side and understand how changes in the key inputs drive the final outcome. If the figure surprises you, isolate one variable at a time and rerun the calculation to identify which assumption is responsible.
Method & assumptionsAuthoritative sources
This calculator projects your HSA balance using the IRS 2024 contribution limits — $4,150 for self-only coverage, $8,300 for family coverage, with a $1,000 catch-up for those 55 and older. It caps combined personal and employer contributions at the applicable limit, then models annual growth using compound interest on the invested portion while accounting for qualified medical withdrawals each year. Tax savings are calculated at your stated marginal federal income tax rate; state tax savings, where applicable, would add further value not reflected here.
The projected balance assumes a constant annual return and consistent medical spending, which will not match real-world volatility. The calculator does not model the 6% IRS excise tax triggered by over-contributions, nor does it reflect HDHP minimum-deductible requirements or out-of-pocket maximums that determine HSA eligibility. Always verify your eligibility with your health plan documents and confirm contribution limits with the IRS or your plan administrator before the tax year closes.
Common mistakes
- !Using an assumption that is not supported by a current local quote, bill, statement or official source.
- !Treating a generic estimate as a lender, provider, payroll or tax authority decision.
- !Mixing monthly and annual inputs without converting them consistently.
- !Forgetting location-specific taxes, fees, eligibility rules or payroll deductions where they apply.
- !Testing only one scenario instead of checking how a cautious assumption changes the result.
What to do next
- Run a second scenario with a cautious assumption so you can see the downside clearly.
- Compare the result with the related calculators below before making a decision.
- Check current local rules, eligibility and provider terms before applying or committing money.
- Keep a record of the assumptions so you can update the estimate when a quote, bill or pay figure changes.
- Use the result to prepare better questions for a lender, provider, adviser or employer rather than treating it as a final answer.
Frequently asked
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