Fidelity HSA Routing Number Tips (2026) | HSA Tracker

The routing number 101205681 is exclusively for moving money into your Fidelity HSA. Do not give this number for bill payments or linking to payment apps, as it will not work and could cause failed transactions.

Fidelity requires a specific prefix before your account number for ACH deposits. Using just your brokerage account number will likely cause the deposit to fail or be rejected.

Many payroll systems require the HSA to be designated as a checking account for direct deposit. Inform your HR or benefits manager that your Fidelity HSA should be set up as a checking account type.

When mailing a check, writing the tax year in the memo line is non-negotiable. Fidelity applies contributions to the tax year you specify, which affects your annual IRS limit tracking.

The IRS sees the total going into your HSA from all sources. You are responsible for ensuring the sum of your payroll deductions and any outside contributions does not exceed the annual limit.

Calling the general Fidelity number can lead to long waits and misrouted calls. Use 800-544-3716 for HSA-specific questions about contributions, transfers, and rules.

Understanding that your HSA is not an ERISA plan means your employer has less reporting burden (no Form 5500), but you have full control and portability over the account.

With the Fidelity Go HSA option, you can begin automated investing for retirement healthcare costs with a minimum balance of just $10, making it accessible for new account holders.

You cannot transfer money from a Flexible Spending Account (FSA) into an HSA. Attempting to do so will be rejected and may create tax complications. Only other HSAs are eligible for transfer.

Ensure your employer correctly reports pre-tax HSA contributions in Box 12 with Code W. An error here could lead to mistakes on your tax return and potential IRS notices.

Enable text or email alerts within your Fidelity account for any deposit or transfer over a certain amount. This helps you catch errors or confirm successful payroll deposits.

Fidelity's mobile app allows you to deposit checks directly into your HSA. This is faster than mailing a check and provides immediate confirmation, useful for year-end contributions.

Maintain a simple spreadsheet logging every HSA deposit: date, source (employer payroll, personal bank transfer, check), amount, and intended tax year. This is your primary defense in an IRS audit.

A transfer from an old HSA does not count toward your annual contribution limit. A rollover or direct contribution from your bank or paycheck does count. Knowing this distinction prevents limit overages.

Electronic deposits must be initiated by the tax filing deadline to count for the prior year. Mailed checks must be postmarked by that date. Do not wait until the last day.

The P.O. Box address is for standard mail. If you need to send a contribution via overnight carrier (FedEx, UPS), you must use a different street address, which you can find on Fidelity's website.

Like other investment accounts, your Fidelity HSA should have a designated beneficiary. This determines who receives the funds if you pass away and can have different tax implications for spouses vs. non-spouses.

Regularly match your HSA statement withdrawals with your saved receipts for eligible medical expenses. This creates a clear audit trail and helps you track your remaining qualified expenses for future reimbursement.

You can pay for eligible expenses directly with your Fidelity HSA debit card, or you can pay out-of-pocket and reimburse yourself later from the HSA. The latter strategy allows funds to grow tax-free longer.

Using your HSA debit card for ineligible expenses before age 65 leads to income tax plus a 20% penalty. Familiarize yourself with the IRS list of qualified medical expenses to prevent costly mistakes.

When choosing your health plan during open enrollment, ensure the HDHP you select is HSA-eligible. Not all high-deductible plans qualify. Enrolling in an ineligible plan means you cannot contribute to an HSA.

Once your HSA balance exceeds your expected annual out-of-pocket medical costs, consider investing the excess for long-term growth. HSAs offer triple tax advantages unmatched by other accounts.

The IRS allows a one-time, lifetime qualified HSA funding distribution from your IRA. This can be a strategic way to move funds into your HSA without affecting annual contribution limits, but the rules are strict.

All HSA contributions, from any source, must be reported on IRS Form 8889, which you file with your personal tax return. Mistakes here are a primary trigger for IRS audits related to HSAs.

If you have family HDHP coverage, your HSA contribution limit is nearly double the individual limit. Ensure your Fidelity HSA account is set up correctly to accept the higher family contribution amount.

The most efficient way to fund your HSA is through pre-tax payroll deductions. This also avoids FICA taxes (Social Security and Medicare) for W-2 employees, an extra savings you don't get with post-tax contributions.