How Does a Health Savings Account (HSA) Work?

The Basics: How Does HSA Work?

A Health Savings Account (HSA) works by allowing you to contribute pre-tax dollars that can be used for healthcare expenses. It's a personal savings account that you own completely, which differs from employer-sponsored plans like FSAs.

The fundamental premise is simple: contribute pre-tax money, use it for eligible healthcare expenses, and receive tax benefits at every step of the process.

Step-by-Step: How HSA Works

Step 1: Verify HDHP Eligibility

To open an HSA, you must be enrolled in a High Deductible Health Plan (HDHP). This is the first requirement for HSA eligibility.

Step 2: Open Your HSA Account

Once eligible, you can open an HSA through your employer (if offered) or independently through a financial institution. Opening an HSA is straightforward - provide basic information and set up your account.

Step 3: Make Contributions

You can contribute to your HSA through payroll deduction (pre-tax) or direct contributions. The contributions reduce your taxable income, saving you money on taxes immediately.

Step 4: Use or Save Funds

You have two options with your HSA funds:

Use Immediately: Pay for current healthcare expenses with your HSA balance
Save for Later: Let your balance grow, rolling over year to year with no limit

Step 5: Claim Eligible Expenses

When you incur qualified healthcare expenses, you can use your HSA debit card or request reimbursement from your HSA balance.

Step 6: Keep Documentation

Maintain receipts and documentation of all healthcare expenses for tax purposes and substantiation if requested by the IRS.

HSA Contributions: How They Work

HSA contributions come in two main forms:

Employer Contributions

Made through payroll with pre-tax dollars
Employer contributions don't count toward your personal contribution limit
Reduce your taxable income further
No FICA taxes on employer contributions

Personal Contributions

Made with pre-tax dollars (if through payroll) or post-tax (if direct contribution)
Count toward annual contribution limits
Can be deducted on your tax return if made with post-tax dollars
For 2026: $4,150 (individual) or $8,300 (family)

Catch-up Contributions

Available at age 55 and older
Additional $1,000 per year allowed
Increases your total HSA savings potential

HSA Withdrawals: How They Work

HSA withdrawals operate differently depending on whether they're for eligible expenses:

For Eligible Healthcare Expenses

Withdraw anytime, tax-free
No income taxes or penalties
No limit on withdrawal frequency
Funds must be used for qualified medical expenses

For Non-Medical Expenses

Subject to income tax at your ordinary tax rate
Plus 20% penalty if under age 65
After age 65, only income tax applies (penalty waived)
At 65+, HSA becomes more like a traditional IRA

How to Request HSA Withdrawals

Use your HSA debit card for direct payments
Request reimbursement online or by mail
Contact customer service for withdrawal assistance

The Triple Tax Advantage: How It Works

Understanding the triple tax advantage is key to how HSA works so effectively:

Tax Advantage #1: Tax-Deductible Contributions

Contributions reduce your taxable income dollar-for-dollar. If you contribute $1,000 to your HSA, your taxable income decreases by $1,000, saving you taxes at your marginal tax rate.

Tax Advantage #2: Tax-Free Growth

Any earnings on your HSA balance through interest or investments grow tax-free. You don't pay taxes on interest or investment gains.

Tax Advantage #3: Tax-Free Withdrawals

Withdrawals for eligible healthcare expenses are tax-free. You don't pay income tax on the money you withdraw for qualified medical expenses.

HSA Portability: How It Works

One of the key ways HSA works in your favor is portability:

Your HSA account belongs to you, not your employer
When you change jobs, your HSA comes with you
You can continue using your HSA balance indefinitely
You can transfer your HSA to another provider
Your account is never forfeited when employment ends

This portability is a major advantage of how HSA works compared to employer-sponsored FSA accounts.

Investment Options: Growing Your HSA

Many HSA providers, including MetLife, offer investment options so you can grow your HSA balance beyond basic savings:

High-yield savings accounts
Money market funds
Mutual funds
Individual stocks (with some providers)
Low-cost ETFs

Once your HSA reaches a certain balance (typically $1,000-$2,000), you can move funds into investments to potentially grow your long-term health savings.

Rollover Rules: How Unused Funds Work

Unlike FSAs with "use-it-or-lose-it" rules, HSA funds roll over indefinitely:

No annual limit on carried-over balances
Unused funds remain in your account year after year
You can accumulate significant health savings over time
Make withdrawals whenever you need them

This is how HSA works as a long-term health savings and investment vehicle, not just a current-year spending account.

HSA After Age 65: How Rules Change

Once you turn 65, how HSA works changes somewhat:

You can still use funds for healthcare expenses tax-free
Non-medical withdrawals are allowed without penalty
Non-medical withdrawals are subject to income tax only
Your HSA functions similarly to a Traditional IRA

Many people use this feature to essentially "unlock" their HSA for retirement planning.