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A third-party administrator is a vendor that handles the operational work of a benefit plan without insuring it. TPAs process claims, maintain eligibility, prepare compliance filings, and administer arrangements such as self-funded medical plans, health FSAs, HRAs, COBRA continuation, and qualified retirement plans, all without taking on the underwriting risk.
A third-party administrator performs plan administration functions on behalf of the plan sponsor while bearing none of the underwriting risk. In a self-funded medical plan, the TPA adjudicates and pays claims from employer funds, maintains eligibility, manages the provider network relationship, handles appeals, and produces reporting. Because the TPA holds the prior authorization criteria and the network standards, it is also where a sponsor turns for the NQTL comparative analysis that mental health parity rules require the plan to keep on hand. In the account-based world, TPAs administer health FSAs, dependent care accounts, HRAs, HSAs, and commuter benefits, including substantiation of claims. In retirement, a TPA typically handles plan documents, nondiscrimination testing, and Form 5500 preparation alongside a recordkeeper. Specialized TPAs handle COBRA and ACA reporting.
The distinction from an insurer matters. When a carrier provides administrative services only, it looks like a TPA but the plan is still self-funded and the employer holds the risk. Either way, the employer remains the plan sponsor and generally the named fiduciary. A TPA usually acts in a ministerial capacity following the plan document, which means the fiduciary responsibility for prudent selection and ongoing monitoring stays with the employer.
That monitoring obligation is where employers get caught. ERISA requires prudent selection of service providers and periodic review of their performance and fees, supported by the fee disclosures providers must furnish. Read the service agreement for what the TPA does and does not do, especially around claim appeals, indemnification, and discretionary authority. Assuming the TPA handles a filing it never agreed to prepare is a recurring source of missed deadlines.
It performs administration without taking underwriting risk. On a self-funded medical plan that means adjudicating and paying claims from employer money, maintaining eligibility, managing the network relationship, handling appeals, and reporting. Account-based administrators handle reimbursement accounts and substantiation, while retirement administrators handle plan documents, testing, and annual filings.
No. The employer remains the plan sponsor and generally the named fiduciary. A TPA usually acts in a ministerial capacity, following the plan document rather than exercising discretion, so the duties of prudent selection and ongoing monitoring stay with the employer no matter how much day-to-day work is outsourced.
Read for scope. Confirm exactly which filings, notices, and appeals the administrator prepares and which it does not, and check the indemnification language and any grant of discretionary authority. Assuming a TPA handles a filing it never agreed to prepare is a recurring cause of missed deadlines and penalties.