Health insurance can look inexpensive when judged only by the monthly premium. That is why comparing total expected yearly cost is more useful than comparing premiums alone. Two plans with very different premiums can produce the opposite result once deductibles, copays, coinsurance, prescriptions and likely medical use are included.
HealthCare.gov specifically advises consumers to compare estimated total yearly costs, not just the premium. The exact way cost sharing works depends on the plan, and some covered preventive services may be available before the deductible is met.
Premium: the cost of keeping the plan
The premium is the recurring amount paid for health insurance coverage. It is generally due whether or not the member receives medical care that month. For employer coverage, the employer may pay part of the premium. For Marketplace coverage, eligible consumers may qualify for premium tax credits under applicable rules.
Deductible: what you pay before broader cost sharing
A deductible is the amount a member pays for specified covered services before the plan begins paying according to its cost-sharing rules. A plan can have separate deductibles for medical and prescription benefits, and family plans may have individual and family deductibles.
Copay: a fixed amount
A copayment is a fixed amount for a covered service, such as a physician visit or prescription. Some services may use copays before the deductible, some after the deductible and some not at all. The Summary of Benefits and Coverage is the best place to confirm how a specific plan works.
Coinsurance: a percentage of the allowed amount
Coinsurance is a percentage of the covered service cost that the member pays after applicable deductible rules are satisfied. If the plan’s allowed amount for an eligible service is $1,000 and the member owes 20% coinsurance, the member’s share would be $200, assuming all relevant deductible requirements were already met. This is a simple illustration; real claims can include multiple services and network rules.
| Cost | How it works | When it matters |
|---|---|---|
| Premium | Recurring payment to maintain coverage | Every month |
| Deductible | Amount paid before specified plan cost sharing begins | Often early in the plan year or after major care |
| Copay | Fixed amount for a covered service | Common for office visits or prescriptions |
| Coinsurance | Percentage of an allowed covered charge | Can be significant for expensive services |
| Out-of-pocket maximum | Plan-year cap on certain in-network covered cost sharing | Protection against very high eligible cost sharing |
Why network status can change the math
In-network providers generally have negotiated rates and cost-sharing rules defined by the plan. Out-of-network care can involve higher cost sharing, separate deductibles or no coverage except in specified situations. Some plans do not count out-of-network spending toward the same out-of-pocket maximum.
A better way to compare plans
- Estimate annual premiums. Multiply the monthly net premium by 12.
- Review routine care. Add likely office visits, prescriptions, therapy and recurring treatment.
- Stress-test a bad year. Compare each plan’s out-of-pocket maximum and network access.
- Check prescription tiers. A low medical deductible does not guarantee low drug costs.
- Verify doctors and hospitals. Provider networks can change, so confirm directly when important.
- Look at HSA eligibility. Certain high-deductible health plans may qualify for Health Savings Accounts under federal rules.
Lower premium or lower deductible?
Neither is always better. People who expect little medical care may prefer a lower premium and accept more cost sharing when care is needed. Someone expecting surgery, expensive prescriptions or frequent specialist care may value a plan with higher premiums but more predictable cost sharing. The decision should reflect expected use, cash reserves and provider needs.
Frequently asked questions
Do all services count toward the deductible?
No. Plan rules vary, and some services can use copays or be covered before the deductible. Review the plan’s Summary of Benefits and Coverage.
Is the out-of-pocket maximum the most I can ever spend?
Not necessarily. Premiums, non-covered services and some out-of-network expenses generally are not included in the same maximum.
Does a lower deductible mean a cheaper plan?
Not necessarily. Plans with lower deductibles often have higher premiums, so compare total expected yearly cost.
Sources & further reading
Reviewed in September 2026. This is general educational information and does not recommend a specific health plan.
