Executive Summary: HSA, HRA, and FSA Integration: Tax Advantaged Structures and Their Interaction With Level Funded Plan Design
LFP-11.08 — Benefits Architecture#
HSAs, HRAs, and FSAs are tax-advantaged structures that interact with level funded plan design in specific and often misunderstood ways. Most brokers present them as standalone products the employer can add. They are design tools whose value depends on how they interact with the plan structure, not on whether they appear in the enrollment package.
The HSA provides triple tax advantage: pre-tax contributions, tax-free growth, and tax-free withdrawals for qualified medical expenses. The 2026 contribution limits are $4,400 for self-only coverage and $8,750 for family coverage, with an additional $1,000 catch-up for members aged 55 or older. The level funded plan must qualify as a high-deductible health plan to enable HSA participation: for 2026, minimum deductibles are $1,700 individual and $3,400 family, with maximum out-of-pocket limits of $8,500 and $17,000. The One Big Beautiful Bill Act, effective January 2026, expanded HSA compatibility to cover bronze and catastrophic ACA Exchange plans, permanently allowed telehealth pre-deductible coverage, and confirmed that direct primary care arrangements meeting fee criteria under IRS Notice 2026-5 no longer disqualify HSA participation. This removes the barrier that previously complicated the DPC integration described in LFP-11.04.
An employer contributing $1,500 to each employee’s HSA on a $3,000 deductible plan effectively provides $1,500 in member cost-sharing reduction while maintaining the $3,000 deductible for stop loss and claims fund purposes. The higher deductible reduces small-claim flow through the level funded arrangement, improving surplus probability and producing favorable stop loss terms.
The HRA is employer-funded only, fully employer-controlled, and non-portable. It is also the most versatile and least-used design tool in level funded. A deductible-only HRA funds reimbursement for deductible expenses while preserving the high-deductible structure for stop loss. An income-adjusted HRA sets different funding levels by employee compensation class, providing more HRA funding to low-income employees who cannot absorb high cost sharing without sacrificing care access. The IRS permits class-based HRA design with specific rules about permissible distinctions. This configuration solves the cost-sharing equity problem within the plan structure without creating separate plan tiers.
The FSA trap is the most common design error: a general-purpose FSA cannot coexist with an HSA. An employer offering both to the same employee class disqualifies HSA eligibility for those employees, triggering income inclusion and a 10 percent penalty on excess HSA contributions. The limited-purpose FSA covering only dental and vision expenses and the post-deductible FSA can coexist with an HSA, but the rules are technical and frequently misunderstood.
The broker who presents HSA, HRA, and FSA as separate add-on benefits is treating design as accretion. The broker who configures the interaction between the HDHP, the HSA contribution strategy, the income-adjusted HRA, and the limited-purpose FSA to optimize combined economics for plan and member is practicing architecture.