Formula: simplified net annual cost = payroll premiums + applicable spousal surcharge − waiver credits + deductible/coinsurance cost sharing − usable employer HSA/HRA funding.
Each arrangement uses the same member-level allowed-spending assumptions. For an embedded family deductible, each member can reach an individual threshold; for an aggregate deductible, family members combine spending before coinsurance begins. Without claim dates, shared deductible and limit effects are allocated proportionally. Claim order can change even the household total when individual and family limits interact.
An employer HSA deposit is treated as household value even if it remains unspent. HRA value is capped at modeled out-of-pocket spending because unused employer reimbursement generally is not portable cash. Premium tax effects, copays, separate prescription deductibles, uncovered services, and out-of-network rules are not modeled.
Current expected-use estimate: Under these simplified assumptions, Spouses separate; children on Spouse's employer plan has the lowest net value cost at $10,640 per year.