Four terms do most of the work in any health plan. The premium is what you pay to keep coverage, the deductible is what you pay for care before the plan starts sharing costs, and copays and coinsurance are your share of the bill after that. Seeing how they fit together makes it much easier to estimate what care will actually cost you.
Premium: the cost of having coverage
The premium is the regular amount, usually monthly, that you pay to keep your plan active. You owe it whether or not you use any medical services. If you get coverage through an employer, your share of the premium is often deducted from your paycheck. Premiums generally do not count toward your deductible or out-of-pocket maximum.
Deductible: your share before cost sharing begins
The deductible is the amount you pay for covered services in a plan year before the plan begins paying its share for many services. Plans differ in what applies to the deductible. Some preventive services may be covered without cost sharing, and some plans let you pay a copay for certain visits even before the deductible is met. Family plans may have both individual and family deductibles.
Copay and coinsurance: sharing costs after the deductible
A copay is a fixed dollar amount for a specific service, such as a set fee for a primary care visit or a prescription. A coinsurance is a percentage of the allowed cost of a service that you pay, while the plan pays the rest. For example, with 20% coinsurance, you pay 20% and the plan pays 80% of the allowed amount.
The allowed amount is the price the plan recognizes for a service, which for in-network providers is often lower than the provider’s full charge. Using out-of-network providers may mean higher cost sharing or no coverage, depending on the plan.
The out-of-pocket maximum
The out-of-pocket maximum is the most you would pay for covered, in-network care during a plan year. Deductibles, copays, and coinsurance typically count toward it. Once you reach it, the plan generally pays 100% of covered in-network services for the rest of the year. Premiums do not count toward this limit.
A worked example
Illustration only; the plan details are hypothetical. Suppose a plan has a $2,000 deductible, 20% coinsurance, and a $6,000 out-of-pocket maximum. You have a covered, in-network procedure with an allowed amount of $10,000.
| Step | You pay | Plan pays |
|---|---|---|
| First $2,000 (deductible) | $2,000 | $0 |
| Remaining $8,000 at 20% coinsurance | $1,600 | $6,400 |
| Total for this procedure | $3,600 | $6,400 |
Your $3,600 is below the $6,000 out-of-pocket maximum, so further care that year would still involve cost sharing until you paid another $2,400. If a second covered bill pushed your total past $6,000, the plan would cover the rest of your in-network costs for that year.
Balancing the four pieces
Plans with lower premiums often have higher deductibles and out-of-pocket maximums, while plans with higher premiums may offer lower cost sharing. A rough way to compare is to add a year of premiums to the cost sharing you might reasonably expect, both for a light-use year and for a heavy-use year.
Key takeaways
- The premium keeps coverage active; it is separate from what you pay for care.
- The deductible must usually be met before coinsurance applies to many services.
- Copays are flat amounts, while coinsurance is a percentage.
- The out-of-pocket maximum caps your yearly in-network cost sharing.
- Network status can change your costs significantly.
Health plan rules vary by insurer, plan type, and location, so the plan’s Summary of Benefits and Coverage and full policy documents are the best place to confirm how each term applies to you. Once these four ideas are clear, comparing plans becomes a much more manageable exercise.