Health insurance costs can be confusing because several types of payments may apply to the same plan. Three terms you will often see are deductible, copay, and coinsurance. Understanding the difference can help you estimate what you may pay when using medical care.

Deductible

A deductible is the amount you generally pay for covered services before the plan begins paying according to its cost-sharing rules. For example, if your annual deductible is $1,500, you may need to pay eligible medical costs until you reach that amount. Some services may be covered before the deductible, depending on the plan.

Copay

A copay is a fixed amount you pay for a covered service. A plan might charge a set copay for a primary care visit, specialist visit, urgent care visit, or prescription. Copays can vary by service and may or may not count toward the deductible.

Coinsurance

Coinsurance is a percentage of the allowed cost that you pay after applicable plan rules are met. If your plan pays 80% of an eligible bill and your coinsurance is 20%, you would pay 20% of the plan's allowed amount, subject to the policy terms.

Out-of-pocket maximum

The out-of-pocket maximum is an important limit on what you pay for covered in-network services during a policy period under many health plans. Once you reach that limit through eligible deductibles, copays, and coinsurance, the plan generally pays the covered costs at the level specified by the policy for the rest of the period.

Why network rules matter

Using an in-network doctor or hospital can significantly affect your cost. Out-of-network care may have higher cost sharing, separate deductibles, reduced benefits, or no coverage at all except in specific circumstances.

A simple way to compare plans

Do not compare health insurance only by monthly premium. Review the deductible, copays, coinsurance percentages, network, prescription benefits, and out-of-pocket maximum. A low-premium plan may cost more overall if you expect frequent medical care.

Also check whether your regular doctors, hospitals, and medications are included. Plan rules can change, so confirm current details directly with the insurer or plan documents.

These terms work together to determine your real healthcare cost. Once you understand each one, comparing plans becomes much easier and unexpected bills become less likely.