The honest summary in one paragraph
HMO is the cheapest premium with the tightest network. PPO costs 20–30% more per month but lets you see any doctor without permission. HDHP is the cheapest headline premium and the only one that comes with an HSA — but the deductible is 2–4x higher, so you pay more out-of-pocket before coverage kicks in. Match the plan to how much you actually use healthcare, not how you'd like to use it.
When HMO wins
You're healthy, you live in a major metro where the HMO network has 1,000+ providers, you have a trusted PCP inside that network, and you don't travel internationally for long stretches. Premium savings of $140–$440/month (single, vs PPO) typically outweigh the mild inconvenience of referrals.
Kaiser Permanente's HMOs — only available in CA, CO, GA, HI, MD/VA/DC, OR, WA — score at the top of J.D. Power member satisfaction surveys and often beat PPO economics outright. If Kaiser is available to you, run the numbers seriously.
When PPO wins
You have at least one chronic condition that needs specialist visits (derm, endo, rheum, cardio), you see out-of-state specialists, you travel regularly for work, or you have school-age kids who play contact sports in multiple states. The flexibility of no-referral specialist access is worth the monthly premium hike.
PPOs also win for people who are planning a major procedure (joint replacement, fertility, bariatric) and want to choose the best surgeon regardless of network.
When HDHP + HSA wins
You're young-to-midlife, healthy, rarely see doctors, and have $4k–$8k in liquid savings to cover the deductible if you do get hit with a claim. The HSA tax deduction ($4,300 individual, $8,550 family in 2026) plus employer HSA match (often $500–$1,500/year) often makes the net cost lower than even the HMO.
Run the Health Insurance Total Cost Calculator with 3 scenarios — no claims, moderate claims, bad year — before choosing.
The HSA long game
The HSA is the single best tax-advantaged account in the US: pre-tax in, grows tax-free, tax-free out for qualified medical expenses. After 65 it converts to a de-facto IRA with normal income tax treatment on non-medical withdrawals.
A 30-year-old maxing the family HSA at $8,550/year (2026) at 7% real return for 35 years accumulates roughly $1.28M. If they never draw it down for medical, it becomes retirement money. If they save receipts, they can withdraw decades of past qualified expenses tax-free at any time. The COBRA Cost Estimator is another place to see how HSA savings play when coverage transitions happen.
The math trap most people fall into
Most employees pick the lowest-premium plan and call it done. That ignores deductible, copays, coinsurance, and out-of-pocket max. Two example employees at the same company in 2026:
- Employee A (healthy): HDHP $495/mo ($5,940/yr) + $500 actual spend + employer HSA $1,000 = net $5,440
- Employee A on PPO: $685/mo ($8,220/yr) + $500 actual spend = $8,720
Same employee, opposite scenario:
- Employee B (family of 4, one chronic condition): HDHP $1,290/mo ($15,480/yr) + $9,500 actual spend (hits OOP max) = $24,980
- Employee B on PPO: $1,920/mo ($23,040/yr) + $3,800 actual spend (copays + one ER) = $26,840
B is closer than it looks, and the PPO is better when you factor in referral-free convenience. A should always take the HDHP. Run your own numbers.
What's not in the table
Mental health parity: all three plan types are legally required to cover mental health equivalently to physical health. In practice, PPOs have more in-network therapists. If you or a family member uses therapy, test the network before enrolling.
Prescription coverage: HDHPs run all drug costs through the deductible until you hit it, including generics. HMOs and PPOs typically have fixed copay tiers from day 1. If you're on a $450/month specialty drug, the HDHP loses badly until you hit the OOP max.
Dental and vision: usually separate entirely. Check dental worth-it math and vision math on their own — those are rarely worth the premium unless your employer pays.