HSA Tax Savings

Estimate HSA contribution, payroll, and investment-growth tax savings.

Description

An HSA tax-savings model applies supplied tax percentages to contributions and investment growth.

An HSA tax-savings model applies supplied tax percentages to contributions and investment growth. Each component is a separate linear estimate.^{[1, 2]}

Estimate HSA contribution, payroll, and investment-growth tax savings.

When to use HSA Tax Savings

Use this tool to estimate HSA contribution, payroll, and investment-growth tax savings.

Prepare the supplied policy terms, dates, assumptions or recorded indicators requested. Keep monetary amounts on one currency basis and select the applicable thresholds separately.

How to use HSA Tax Savings and understand its results

Prepare the supplied policy terms, dates, assumptions or recorded indicators requested. Keep monetary amounts on one currency basis and select the applicable thresholds separately.
Enter annualContribution, marginalIncomeTaxPercent, payrollTaxPercent, annualInvestmentGrowth, capitalGainsTaxPercent using the field table and calculation rules, then run the tool.
Read contributionTaxSavings, payrollTaxSavings, growthTaxSavings, totalEstimatedTaxSavings. The explanation below defines the units, signs, ordering and any flags or placeholder values.
If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.

Input field	Meaning	Value type; see rules below	Requirement
annualContribution	Annual HSA contribution	number; minimum: 0	Required
marginalIncomeTaxPercent	Marginal income tax rate (%)	number; minimum: 0	Required
payrollTaxPercent	Payroll tax rate (%)	number; minimum: 0	Required
annualInvestmentGrowth	Annual investment growth	number; minimum: 0	Required
capitalGainsTaxPercent	Capital-gains tax rate (%)	number; minimum: 0	Required

Enter nonnegative amounts and rates. Return three components and their sum. Rates have no 100% maximum.

savings=contribution×incomeRate/100 + contribution×payrollRate/100 + growth×gainsRate/100

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
contributionTaxSavings	Contribution tax savings	number; minimum: 0
payrollTaxSavings	Payroll tax savings	number; minimum: 0
growthTaxSavings	Tax savings on growth	number; minimum: 0
totalEstimatedTaxSavings	Total estimated tax savings	number; minimum: 0

json

{
  "input": {
    "annualContribution": 5000,
    "marginalIncomeTaxPercent": 20,
    "payrollTaxPercent": 7.5,
    "annualInvestmentGrowth": 1000,
    "capitalGainsTaxPercent": 15
  },
  "output": {
    "contributionTaxSavings": 1000,
    "payrollTaxSavings": 375,
    "growthTaxSavings": 150,
    "totalEstimatedTaxSavings": 1525
  }
}

Limitations and assumptions

No eligibility, contribution limits, state treatment, payroll route or qualified-distribution status is checked. Caller assumptions determine whether each component applies.

Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use HSA Deductible Screen: Compare plan figures with caller-supplied HSA thresholds. For a complementary task, use FSA Election Split: Apply separate caller-supplied caps to medical and dependent-care FSA elections.

Further background: Publication 969: Health Savings Accounts and Other Tax-Favored Health Plans.

References

HSA Tax Savings — tool.io
Publication 969: Health Savings Accounts and Other Tax-Favored Health Plans — Internal Revenue Service

Similar or alternative tools

HSA Deductible Screen
Compare plan figures with caller-supplied HSA thresholds.
FSA Election Split
Apply separate caller-supplied caps to medical and dependent-care FSA elections.