The out-of-pocket limit doesn't include your monthly premiums. It also doesn't include anything you spend for services your plan doesn't cover.
Example of out-of-pocket maximum with high medical costs
Let's say you need surgery with allowable costs of $20,000, and the following figures apply to your health insurance plan.
You pay the first $1,300 of covered medical expenses (your deductible).
Your 20% coinsurance on the rest of the costs ($18,700) comes to $3,740.
So your total costs would be $5,040. That's $1,300 (your deductible) plus $3,740 (coinsurance).
But your out-of-pocket maximum is $4,400. Your insurance company pays all covered costs above $4,400 - for this surgery and any covered care you get for the rest of the plan year.
Generally, plans with lower monthly premiums have higher out-of-pocket limits. Plans with higher premiums usually have lower out-of-pocket maximums.