In ASO Self-Funded plans, the employer funds the actual medical claims while a third-party administrator handles the administrative tasks. The fixed monthly cost they pay for that administration is the fixed admin fee. This fee covers ongoing services like enrollment, claims processing, reporting, compliance, and other admin duties, and it stays the same each month regardless of how many claims occur. The other items don’t fit as the fixed monthly cost: there isn’t a traditional fixed premium in ASO because there isn’t a bundled insurer premium—the plan is self-funded. The stop-loss premium is a separate protection cost for limiting catastrophic claims, and while it may be required, it’s not the constant monthly admin charge. The claim fund is the pool of money used to pay actual claims and fluctuates with the level of claims rather than being a fixed monthly fee. So the fixed monthly cost for the employer is the fixed admin fee.