The cheapest premium was the most expensive plan. The math took 10 minutes.
Angela, 26, landed her first full-time job with benefits. HR emailed her a PDF comparing three health plans and told her she had five days to choose. She opened it: columns of numbers labeled "premium," "deductible," "coinsurance," "out-of-pocket max." She'd never had to think about any of this.
She almost just picked Plan A — the lowest monthly premium at $89. It seemed obvious.
"Deductible? Coinsurance? Out-of-pocket maximum? I googled these and every explanation used more words I didn't understand. I just want to know which plan is going to cost me less."
Angela didn't know that "cheapest premium" and "cheapest plan" are almost never the same thing.
Premium: the monthly amount you pay regardless of whether you use healthcare. Deductible: the amount you pay out-of-pocket before insurance covers anything. Coinsurance: the percentage you pay after meeting your deductible (e.g., 20% you, 80% insurer). Out-of-pocket maximum: the most you'll ever pay in a year — after this, insurance covers 100%.
A plan with a $89 premium and a $4,000 deductible costs $1,068/year if you never get sick, but $5,068 if you need any significant care. A plan with a $150 premium and a $1,500 deductible costs $1,800/year if healthy, but $3,300 at worst. If you visit a doctor more than twice a year, the 'expensive' plan is often cheaper in total.
Angela picked Plan C. Based on her actual healthcare usage that year, she estimates she saved $2,400 compared to what she would have paid with Plan A. The 10-minute calculation changed her entire year's financial picture.