You may know that a premium is the bill you pay for your health insurance plan. But when buying health insurance, you need to know how your health plan works and what else you may have to pay.

Here are 3 terms to know:

Deductible: amount you must pay before your plan starts paying for your covered services.

Coinsurance: percentage of the cost you pay for a covered service after you meet your deductible.

Out-of-pocket maximum: the most you have to pay for costs under your health care plan during a certain period of time (most often 1 year).

It really comes down to dollars and sense when shopping for a health insurance plan. Finding out now what affects costs before you start to shop will make it easier for you to select the plan that’s the best fit for your budget.