Open enrollment forces one big choice: a high-deductible health plan (HDHP) with low monthly premiums, or a PPO with higher premiums but lower costs when you actually see a doctor. Pick wrong and you can lose thousands over the year — not because one plan is "bad," but because it doesn't fit how you use health care. Here's the honest comparison, with real 2027 numbers, so you can decide on math instead of guesswork. The Two Plans in 30 Seconds HDHP: Low monthly premium. High deductible — you pay most costs yourself until you hit it. Often paired with a Health Savings Account (HSA) , which is the best tax break in the entire tax code. PPO: Higher monthly premium. Lower deductible, fixed copays for doctor visits and prescriptions, and the freedom to see specialists without a referral. No HSA. The trade is simple: HDHP charges you less every month but more when you're sick. PPO charges you more every month but less when you're sick. The 2027 Numbers That Matter ...