IRS Form 5305-B Guide: Health Savings Trust Account Rules

Introduction: What Is IRS Form 5305-B?

IRS Form 5305-B, titled Health Savings Trust Account, is a model legal agreement created by the Internal Revenue Service (IRS). It is governed under Section 223(a) of the Internal Revenue Code (IRC).

This form is used by an individual account owner and a qualified trustee (such as a bank, insurance company, or IRS-approved trust entity) to create a Health Savings Account (HSA) structured as a trust. It sets forth the statutory terms and conditions necessary for the account to receive tax-exempt treatment under federal tax law.

Because Form 5305-B is an IRS-designed model agreement, executing it guarantees that the underlying HSA trust complies with all federal health tax regulations without requiring customized legal drafting.

Purpose of the Form

Health Savings Accounts offer a powerful “triple tax advantage”: contributions are tax-deductible (or pre-tax via payroll), account earnings grow tax-free, and withdrawals for qualified medical expenses are 100% tax-free. To qualify for these unique benefits, an HSA must strictly meet statutory rules outlined in IRC Section 223.

Form 5305-B provides pre-approved, standardized legal language that establishes the trust. It legally binds the account owner and trustee to mandatory requirements, such as restricting contributions to cash, capping annual deposits at statutory limits, and prohibiting investments in life insurance.

By using this standardized agreement, taxpayers and trustees establish a legally compliant trust framework that protects the tax-exempt status of medical savings.

Who Needs to File This Form

Form 5305-B is executed whenever an eligible individual establishes an HSA structured as a trust account with an authorized financial trustee. An account owner must meet the following eligibility criteria to execute this agreement:

• HDHP Coverage: You must be covered under a qualifying High Deductible Health Plan (HDHP) on the first day of the month.
• No Disqualifying Coverage: You cannot be covered by any other non-HDHP health insurance plan (with limited exceptions for dental, vision, disability, or permitted preventive care).
• No Medicare Enrollment: You must not be enrolled in Medicare Part A, Part B, or Part D.
• Tax Dependency Status: You cannot be claimed as a dependent on another individual’s federal tax return.

Who Is Exempt / Not Required to File

Not everyone who opens or maintains a health account uses Form 5305-B. You do not need to execute this form under the following circumstances:

• Custodial HSAs: If you open an HSA at a retail brokerage or standard commercial bank structured as a custodial account, you will execute Form 5305-C (Health Savings Custodial Account) instead.
• Flexible Spending Accounts (FSAs) & HRAs: Employer-provided Health Flexible Spending Arrangements or Health Reimbursement Arrangements do not use Form 5305-B.
• Existing HSA Owners: If your HSA trust account is already established and operating, you do not need to re-execute Form 5305-B each year.
• Ineligible Individuals: Individuals not enrolled in a qualifying HDHP cannot open or execute a new Form 5305-B trust agreement.

When to File

Form 5305-B is an event-based agreement executed when you set up your HSA trust account. Important timing milestones include:

• Account Establishment: The agreement must be executed by both the account owner and the trustee on or before the date the initial deposit or rollover is made.
• Annual Contribution Deadline: Contributions for a given tax year can be made at any point during that year or up until the account owner’s regular federal income tax filing deadline (typically April 15th of the following year, without extensions).

Because Form 5305-B is an account creation contract, it is completed once per trust account rather than submitted on an annual tax calendar.

Where and How to File

A crucial rule regarding Form 5305-B is that it is not mailed to or filed with the IRS. It is an internal agreement between the individual and the financial trustee.

• Trustee Retention: The financial institution or trustee keeps the signed original or digital record in its permanent compliance files.
• Account Owner Records: The account owner retains a completed copy for their personal tax and financial records.
• Execution Methods: Most financial institutions provide electronic execution of Form 5305-B through secure online onboarding portals during account setup.

Step-by-Step Instructions to Fill Form 5305-B

Form 5305-B contains identifying fields, statutory operating articles, and signature lines.

Section	Topic Area	What to Enter / Agree To
Header Section	Identity Information	Enter the account owner’s legal name, residential address, and Social Security Number (SSN), along with the trustee’s legal corporate name, address, and Employer Identification Number (EIN).
Eligibility Representation	Qualification Affirmation	The account owner certifies HDHP coverage, absence of disqualifying health coverage, non-enrollment in Medicare, and non-dependent tax status.
Articles I – IV	Contributions & Vesting	Specifies that contributions must be in cash (except rollovers), limits annual contributions to statutory caps, affirms 100% immediate nonforfeitable ownership, and forbids life insurance investments or commingling of assets.
Articles V – VII	Distributions & Death Rules	Outlines how withdrawals are distributed for qualified medical expenses, establishes beneficiary transfer rules upon the owner’s death, and details trustee reporting duties.
Article VIII & Signatures	Administration & Execution	Allows optional provisions (such as fee schedules and governing state laws). The account owner and an authorized representative of the trustee sign and date the agreement.

Understanding Contributions and Rollovers (Article I & II)

These articles establish that the trustee will accept cash deposits from the account owner, their employer, or family members up to the annual statutory limit for individual or family coverage (plus the age 55+ catch-up contribution). They also permit trustee-to-trustee rollover contributions from other HSAs, Archer MSAs, or a one-time qualified funding distribution from a Traditional IRA.

Distribution and Beneficiary Rules (Articles V & VI)

Under these provisions, the account owner directs distributions for medical care. If the account owner dies and the designated beneficiary is a surviving spouse, the trust automatically becomes an HSA in the spouse’s name. If designated to a non-spouse, the account ceases to be an HSA and becomes taxable to that beneficiary.

Required Documents and Information Needed Before Filling

Before completing Form 5305-B with your chosen trustee, gather the following details:

• Personal Identification: Legal name, date of birth, residential address, and Social Security Number (SSN).
• HDHP Policy Details: Health insurance policy records showing effective dates and deductible levels to verify qualifying HDHP coverage.
• Trustee Information: The official corporate name, address, and EIN of your trustee institution.
• Beneficiary Designations: Full names, birthdates, SSNs, and allocation percentages for primary and contingent beneficiaries.
• Initial Deposit Details: Bank routing information, check, or transfer documentation for an HSA-to-HSA rollover.

Common Mistakes to Avoid

• Mailing the Form to the IRS: Submitting Form 5305-B to the IRS creates administrative confusion, as the IRS does not collect or archive these setup agreements.
• Confusing Trust and Custodial Forms: Using Form 5305-B for a standard brokerage custodial HSA instead of Form 5305-C.
• Opening Without HDHP Coverage: Executing the agreement when not enrolled in a qualifying High Deductible Health Plan, which makes contributions impermissible.
• Exceeding Annual Contribution Limits: Depositing more than the annual statutory maximum across all employer and individual contributions combined.
• Using HSA Funds for Non-Medical Expenses: Taking distributions for personal, non-health-related expenses, which triggers steep tax penalties.

Penalties for Non-Filing or Errors

While Form 5305-B does not carry a late-filing fee because it is an internal contract, violating HSA tax rules leads to substantial penalties:

• Non-Qualified Distribution Penalty: Withdrawing HSA funds for non-medical expenses before age 65 triggers ordinary income tax plus a 20% additional tax penalty under IRC Section 223(f)(4).
• Excess Contribution Penalty: Contributing more than the annual limit results in a 6% excise tax each year under IRC Section 4973 on the excess amount until it is withdrawn.
• Prohibited Transactions: Engaging in prohibited self-dealing under IRC Section 4975 (such as borrowing money from your HSA) causes the trust to lose its HSA status immediately, making the entire balance taxable as ordinary income.

Related Forms and Schedules

When establishing and maintaining an HSA trust account, you will encounter these related IRS tax forms:

• Form 8889: Health Savings Accounts (HSAs), filed annually with your Form 1040 to report contributions, calculate deductions, and track distributions.
• Form 5305-C: Health Savings Custodial Account (used for custodial HSAs).
• Form 5498-SA: HSA, Archer MSA, or Medicare Advantage MSA Information (issued annually by the trustee to report total contributions and fair market value).
• Form 1099-SA: Distributions From an HSA, Archer MSA, or Medicare Advantage MSA.
• Form 5329: Additional Taxes on Qualified Plans (used to calculate excise taxes on excess HSA contributions).
• Form 1040 / 1040-SR: U.S. Individual Income Tax Return.

Frequently Asked Questions (FAQs)

1. Do I need to send Form 5305-B to the IRS?

No. Form 5305-B is an agreement between you and your financial trustee. It is retained in your personal files and the trustee’s records, never submitted to the IRS.

2. What is the difference between Form 5305-B and Form 5305-C?

Form 5305-B establishes an HSA organized as a Trust Account managed by a trustee. Form 5305-C establishes an HSA organized as a Custodial Account held by a custodian (which is the most common format used by commercial banks and payroll administrators).

3. Can employers make contributions to my Form 5305-B HSA?

Yes. Employers can contribute directly to your HSA trust account on your behalf. These employer contributions are excluded from your gross income and reported on Form W-2 in Box 12 using Code W.

4. Does my HSA balance roll over every year?

Yes. Unlike Flexible Spending Accounts (FSAs), an HSA has no “use-it-or-lose-it” rule. All unspent funds in your Form 5305-B trust roll over automatically from year to year and continue to grow tax-free.

5. What happens to my HSA funds once I turn 65?

Once you reach age 65, you can withdraw funds from your HSA for non-medical expenses without paying the 20% penalty, though non-medical withdrawals will be subject to regular income tax (similar to a Traditional IRA).

6. Can I transfer money from an IRA into a Form 5305-B HSA?

Yes. The IRS permits a once-in-a-lifetime qualified HSA funding distribution from a Traditional or Roth IRA directly into your HSA, up to your maximum annual contribution limit for that year.

Conclusion

IRS Form 5305-B is a vital legal document that allows individuals and qualified financial trustees to set up an HSA trust account. By using this pre-approved model framework, account owners ensure their healthcare savings grow tax-free while complying fully with federal tax guidelines.

To maximize the tax advantages of your HSA, ensure you maintain qualifying HDHP coverage, monitor annual contribution caps, keep receipts for qualified medical expenses, and store your executed Form 5305-B safely in your permanent records.