Key Terms and Definitions for Health Accounts

Health savings accounts, flexible spending accounts, and health reimbursement arrangements each carry a specific vocabulary that governs eligibility, contribution ceilings, qualified expenses, and tax treatment. Misapplying a single term — such as confusing a "rollover" with a "carryover" — can trigger IRS penalties or disqualify an account entirely. This page defines the core terminology used across all three account types, clarifies the boundaries between similar concepts, and maps each term to the federal statutes and agency guidance that give it legal force. The definitions here align with the regulatory context for health savings established by the IRS and the Department of the Treasury.

Definition and Scope

The foundational authority for health account terminology is the Internal Revenue Code (IRC). HSAs are governed by IRC § 223, FSAs by IRC § 125 and § 106, and HRAs by IRS Notice 2002-45 and subsequent Treasury regulations. The IRS publishes annual guidance — most recently consolidated in IRS Publication 969 — that operationalizes these statutory definitions.

Key account-type definitions:

• Health Savings Account (HSA): A tax-exempt trust or custodial account established under IRC § 223 for individuals enrolled in a qualifying High-Deductible Health Plan (HDHP). Contributions, earnings, and qualifying distributions are all excludable from federal gross income — the structure known as the "triple tax advantage."
• Flexible Spending Account (FSA): An employer-sponsored benefit arrangement under IRC § 125 that allows pre-tax salary reductions to fund qualified medical or dependent care expenses within a plan year. FSAs are not portable and are subject to the use-it-or-lose-it rule codified in Treasury Regulation § 1.125-5.
• Health Reimbursement Arrangement (HRA): An employer-funded account described in IRS Notice 2002-45, from which employers reimburse employees tax-free for qualified medical expenses. Employees cannot contribute to an HRA; all funding originates with the employer.
• High-Deductible Health Plan (HDHP): A health plan meeting minimum deductible and out-of-pocket maximum thresholds set annually by the IRS. For 2024, the minimum deductible is $1,600 for self-only coverage and $3,200 for family coverage (IRS Revenue Procedure 2023-23).
• Qualified Medical Expense: An expense described in IRC § 213(d) — including most medical, dental, and vision costs — that is eligible for tax-free payment or reimbursement from an HSA, FSA, or HRA. The IRS HSA overview at nationalhealthsavingsauthority.com/index provides a structured entry point to qualified expense guidance.

How It Works

Understanding how terms interact mechanically is essential to avoiding disqualification events. The following numbered breakdown traces the lifecycle of funds through an HSA — the most structurally complex of the three account types:

1. Eligibility determination: An individual must be enrolled in an HDHP, not be covered by any disqualifying secondary coverage (with narrow exceptions for permitted insurance and permitted coverage as defined in IRS Publication 969), and not be enrolled in Medicare. These conditions must be met on the first day of the month in which the contribution is made.
2. Contribution: Deposits are made by the account holder, the employer, or both, subject to the annual statutory limit. For 2024, the limit is $4,150 for self-only and $8,300 for family coverage (IRS Revenue Procedure 2023-23). A catch-up contribution of $1,000 is permitted for individuals aged 55 or older.
3. Investment and growth: HSA funds held in a custodial account may be invested in mutual funds, equities, or other permitted instruments. Earnings accumulate tax-free under IRC § 223(e).
4. Distribution: Withdrawals for qualified medical expenses under IRC § 213(d) are excluded from gross income. Non-qualified withdrawals before age 65 are subject to income tax plus a 20% excise penalty under IRC § 223(f)(4).
5. Rollover: Any HSA balance remaining at year-end rolls over automatically to the next plan year with no forfeiture — a key structural distinction from FSAs.

FSA-specific mechanics — Carryover vs. Grace Period:

These two terms are frequently conflated but are mutually exclusive plan features:

Common Scenarios

Scenario 1 — Rollover vs. Carryover confusion: An employee with a general-purpose FSA carryover balance on January 1 attempts to open an HSA. Because an active general-purpose FSA balance disqualifies HSA participation under IRC § 223(c)(1)(B), the HSA contributions are considered excess contributions subject to the 6% excise tax under IRC § 4973 unless corrected by the tax filing deadline.

Scenario 2 — HDHP mid-year enrollment: An individual enrolls in an HDHP on July 1. Under the last-month rule (IRC § 223(b)(8)), the full annual contribution limit may be used, but the individual must remain HDHP-eligible through December 31 of the following year or face a testing period failure, triggering inclusion of the excess amount in gross income plus a 10% additional tax.

Scenario 3 — HRA and FSA stacking: A traditional HRA combined with a general-purpose FSA is permissible when the HRA is the secondary payer (i.e., the FSA is exhausted first). This is distinct from a Limited-Purpose FSA, which restricts reimbursements to dental and vision only, allowing concurrent HSA contributions.

Scenario 4 — Dependent Care FSA (DCFSA): This account is structurally separate from a health care FSA. It reimburses employment-related dependent care expenses under IRC § 129, with a 2024 contribution limit of $5,000 per household ($2,500 for married individuals filing separately), as documented in IRS Publication 503.

Decision Boundaries

Selecting the correct account type — or determining whether two accounts can coexist — depends on applying precise definitional tests, not general descriptions. The critical boundaries are:

HSA-disqualifying coverage: Any non-HDHP health coverage that pays medical expenses before the HDHP deductible is met disqualifies HSA contributions. Permitted exceptions include coverage for accidents, disability, dental, vision, long-term care, and specific preventive care as enumerated in IRC § 223(c)(2)(C) and IRS Notice 2004-23.

QSEHRA vs. ICHRA: Both are HRA variants, but eligibility and design rules differ sharply. A Qualified Small Employer HRA (QSEHRA), created by the 21st Century Cures Act (Pub. L. 114-255), is available only to employers with fewer than 50 full-time equivalent employees and caps annual reimbursements at $6,150 (self-only) and $12,450 (family) for 2024 (IRS Notice 2023-90). An Individual Coverage HRA (ICHRA), established by Treasury regulations effective 2020, has no contribution cap and is available to employers of any size, but requires employees to be enrolled in individual health insurance coverage.

FSA use-it-or-lose-it: The forfeiture rule is not a penalty in the IRC § 4973 sense — it is a structural feature of the plan year design enforced under Treasury Regulation § 1.125-5(c). Unused balances above the permitted carryover amount are forfeited to the employer, not to the IRS.

Excess contributions: Any HSA contribution exceeding the annual statutory limit is subject to a 6% excise tax per year under IRC § 4973 for each year the excess remains in the account. Correction procedures involve withdrawing the excess amount plus attributable earnings before the tax filing deadline, as outlined in IRS Publication 969.

References

• IRS Publication 969 — Health Savings Accounts and Other Tax-Favored Health Plans
• IRC § 223 — Health Savings Accounts (via U.S. House Office of the Law Revision Counsel)
• [IRS Revenue Procedure 2023-23 — 2024 HSA and HDHP Thresholds](https://www.irs.

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