finance calculator
HSA Tax Savings Calculator
Estimate federal and FICA tax savings from contributing to a Health Savings Account.
Inputs
Results
Projected HSA Value
$297,776
Formula
HSA tax savings and compound growth formulas
Annual Savings = Contribution × (Income Tax Rate + FICA Rate)
Net Annual Cost = Contribution − Annual SavingsThe calculator estimates your combined federal, state, and payroll (FICA) tax savings, subtracts this from your contribution to find the net out-of-pocket cost, and compares both projections under identical compound growth rates.
Step by step
How the calculation works
- 1Enter your planned annual HSA contribution (up to the annual IRS limit).
- 2Provide your marginal tax rate (federal + state income tax bracket combined).
- 3Toggle FICA savings (7.65%) depending on whether you contribute through pre-tax payroll deductions.
- 4Review the projected ending balance and compared taxable investing alternative.
Example
Example HSA tax advantage scenario
With a $4,400 annual contribution, a 22% tax bracket, payroll deductions enabled (saving FICA), 25 years, and 7% annual growth, the HSA saves $1,304.60 in taxes annually. Over 25 years, the HSA compounds to $297,776, compared to $209,486 for a taxable account funded by the net $3,095.40 annual out-of-pocket cost.
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