Self-Funded Health Insurance for California Employers (2026)

Self-funding means your company pays its own medical claims through a third-party administrator (TPA) or a carrier acting as one (ASO – administrative services only), and buys stop-loss insurance for catastrophic claims. It is how most large American employers fund benefits, and it is a size-and-data game: done right it is the cheapest way to run a health plan, done at the wrong size it is a way to meet your deductible on your own balance sheet.

The pieces

• ASO/TPA – runs the network, adjudicates claims, handles ID cards and service. Carriers like Anthem, Blue Shield, UnitedHealthcare, Aetna and Cigna all sell ASO in California, alongside independent TPAs.
• Stop-loss – specific coverage caps your exposure on any one member; aggregate coverage caps the year in total. Stop-loss policies in California are regulated by the CDI, and for small employers (2-50) the SB 161 attachment-point floors described in our level funded guide apply here too.
• PBM and point solutions – pharmacy contracts and add-ons you can actually negotiate once you own the plan.

The California wrinkles

Self-funded plans are governed by federal ERISA law and are generally exempt from California benefit mandates and premium taxes that insured plans carry – part of the structural savings. The trade-offs: your company holds the claims volatility between attachment points, you need credible claims data to price stop-loss well (which is why this typically starts around 100 employees), and California hospital pricing makes reference-based pricing strategies attractive on paper but combative in practice – we tell clients exactly which networks and RBP vendors generate the fewest member disputes.

Who it fits

Groups of roughly 100+ with claims history, stable cash flow and an appetite for managing the plan – or smaller groups only via the level funded packaging. If a vendor is pitching raw self-funding to your 30-person California company, the SB 161 math above is the first thing to check and it usually ends the conversation.

Reviewed August 2026. Plan availability, networks and rates vary by county and group size. We never publish premiums we cannot verify for California – request a quote for real numbers.