This lesson is general education about U.S. personal finance, not financial, tax or investment advice. Tax rules and limits change every year; check IRS.gov or a qualified professional for your situation.
What you’ll learn
- Open enrollment is the yearly window to pick or change benefits; outside it you need a qualifying life event such as marriage, a birth or losing other coverage.
- Premium, deductible, copay and coinsurance stack together, and the out-of-pocket maximum caps your total for covered services in a plan year.
- Low-premium plans usually carry higher deductibles, so compare total yearly cost rather than the monthly amount taken from your paycheck.
- The No Surprises Act protects you from balance bills in emergencies and at in-network facilities, but it does not apply to short-term, limited-duration insurance.
- FSAs, HSAs and HRAs all help pay medical costs, but they differ in the rules on contributions and unused money, so read your plan documents before you commit.
Open enrollment arrives with a stack of plan descriptions, comparison charts and acronyms. If this is your first time choosing benefits at work, the packet can read like code. This glossary takes the common terms one at a time, in plain English, with worked numbers so you can compare your options without guessing.
What Open Enrollment Is and Why Deadlines Matter
Open enrollment period is the yearly window when you can pick a health plan or adjust the coverage you already have. Outside this window, you generally cannot enroll in a plan or switch plans.
Special Enrollment Period is the exception: a stretch of time outside open enrollment when you can still sign up or make changes. You qualify through a life event such as a marriage, a new child, or the loss of other coverage.
Deadlines carry weight. For plans on HealthCare.gov, open enrollment runs from November 1 to January 15, and January 15 is the last day to enroll in coverage that starts February 1. If you do nothing between November 1 and December 15, you will likely be automatically re-enrolled in the same plan or a similar one, and your costs can change. Employer plans set their own windows, so mark the dates in your packet. Medicaid and the Children’s Health Insurance Program (CHIP) skip the calendar entirely: if you qualify, you can apply at any point during the year, and coverage can start immediately.
COBRA matters if you are between jobs. It lets former employees, retirees and their dependents temporarily keep their existing group health coverage, for up to 18 months and up to 36 months in certain circumstances. You pay the entire premium yourself, which is why many people compare COBRA against an individual policy before committing.
Summary of Benefits and Coverage is the plain-language document insurers must provide that lays out what a plan covers and what it costs, in a consistent format. Read it before you compare anything else.
Premium, Deductible and Copay: The Cost Words
Premium is the amount you pay to keep your insurance active, usually every month. On a job-based plan it comes straight out of your paycheck. If you have never traced a paycheck line by line, reading your pay stub, line by line shows where every deduction lands.
Deductible is the amount you pay out of pocket for covered services before the plan starts to pay. If your deductible is $2,000, you pay the first $2,000 of covered care yourself. Plans often carry separate deductibles for in-network and out-of-network care. Some family plans set a per-person amount with a family cap: one university plan, for example, required each covered member to meet a $300 individual deductible before coinsurance began, with the family total capped at $900.
Copay is a set dollar amount that comes due when you use certain services, often collected at the visit itself: $30 at the pharmacy, say, or $20 for a doctor’s appointment.
Premium and deductible move in opposite directions. A low deductible usually means a higher premium, and a low premium usually means a higher deductible. The cheapest monthly premium is not automatically the cheapest plan. If you expect to use a lot of care, a higher premium with a lower deductible can cost less over the year.
Coinsurance and the Out-of-Pocket Maximum
Coinsurance is your percentage share of a covered service’s cost, calculated after you meet the deductible. With 20 percent coinsurance, you pay 20 percent of the plan’s allowed cost and the insurer pays the other 80 percent.
Out-of-pocket maximum is the yearly ceiling on your share of costs for covered care. After your spending crosses that line, the plan picks up the entire cost of covered services for the remainder of the year. The Affordable Care Act requires plans to cap out-of-pocket costs for essential health benefits; limits of $6,850 for self-only coverage and $13,700 for family coverage have applied under the law.
Try it
Add the pieces together to see your true yearly cost: premiums, plus deductible, plus copays and coinsurance, up to the out-of-pocket maximum. Comparing plans on premium alone misses most of the math.
Allowed Amount, Balance Billing and the No Surprises Act
Allowed amount is the most your insurance will pay for a service. If a provider charges more than that, the difference can land on you.
Balance billing is what happens when an out-of-network provider bills you directly for that difference, on top of any cost-sharing you already owe. The Department of Labor’s example: an out-of-network provider charges $1,000 for a service and the plan’s allowed amount is $250. You could have been billed the remaining $750, plus your normal cost-sharing.
The federal No Surprises Act restricts that practice. It protects you from surprise bills for most emergency services, for non-emergency services from out-of-network providers at certain in-network facilities such as hospitals, hospital outpatient departments and ambulatory surgical centers, and for out-of-network air ambulance services. It applies to job-based plans and to plans you buy yourself. It does not apply to short-term, limited-duration insurance.
Networks and Plan Types
Network is the group of doctors, labs, hospitals and other providers your plan contracts with at a set payment rate. In-network providers have that contract. Out-of-network providers, sometimes called non-preferred providers, do not, and using them costs more, if the plan covers them at all.
The four common plan types trade freedom for price:
| Plan type | How it works |
|---|---|
| HMO | Usually covers care only from doctors the HMO employs or contracts with. Out-of-network care is generally not covered unless it is an emergency, and you may need to live or work inside the plan’s service area. |
| PPO | You pay less for in-network providers, but you can go out of network without a referral for an added cost. |
| EPO | Pays for care only when you stay inside its network of doctors, specialists and hospitals, with emergencies as the exception. |
| POS | You pay less for in-network care, and you need a referral from your primary care doctor to see a specialist. |
Three more terms finish the set. A referral is the approval from your primary care doctor that some plans require before you see a specialist. Prior authorization is approval from your plan, and in some cases your primary care doctor, before certain services such as scans or surgery. A formulary, sometimes called a preferred drug list, is the list of prescription drugs a pharmacy plan covers; drugs outside it may carry a higher cost, need prior authorization or not be available.
Preventive Care and Essential Health Benefits
Preventive care is care that helps you stay ahead of illness: screenings, immunizations, flu shots, cholesterol and blood pressure tests, counseling and well visits. Under the Affordable Care Act, plans cover these services with no copay, coinsurance or deductible when you use a provider in your plan’s network. That is why some services are free even before you have met the deductible.
Marketplace plans must cover the law’s 10 essential health benefit categories. Those categories include prescription medications, emergency care, hospital stays, lab testing, and treatment for mental health and substance use conditions.
The Accounts: FSA, HSA and HRA
Health FSA is a Flexible Spending Account, an account some employers offer that you fund through automatic payroll deductions and spend on eligible health costs. Your plan sets the contribution limit and the rules for money left unspent at the end of the year, so read them before you commit.
A Health Savings Account is a savings account for qualified medical costs. Whether one is available to you depends on the health plan you choose, and the rules on contributions and unused money come with the account, so read them before you commit.
An HRA, or Health Reimbursement Arrangement, is an account that reimburses eligible medical costs under terms set out in the plan. The plan documents spell out what it covers and how the money works.
Terms on the Rest of the Form
Open enrollment packets usually cover more than health insurance.
Life insurance often comes in two layers: a basic amount that is often provided automatically and optional amounts you can elect on top of it. Dental and vision are typically separate elections, each with its own premium, copays and deductibles.
The 401(k) may appear in the same packet. Signing up is separate from picking health plans, but the deadline habits are the same: decide, and act before the window closes. If you are weighing your first enrollment, 401(k) basics covers how the account and the employer match work, and 401(k) vesting schedules explains when matched money becomes truly yours.
A Short Checklist Before You Click Enroll
- Find the deadline first. Missing it can mean a year in a plan you would not have chosen, or automatic re-enrollment in your current one.
- Read the Summary of Benefits and Coverage for each plan you are weighing.
- Estimate total cost, not just premium. If you expect regular prescriptions or visits, run the numbers at high and low use.
- Check that your doctors and pharmacies are in the network, and note the plan type so you know whether referrals or prior authorization are required.
- Look at the out-of-pocket maximum, and whether in-network and out-of-network amounts are tracked separately.
- Decide on the accounts. An FSA, HSA or HRA can change your effective costs, but only if the rules fit how you actually spend.
- If your employer offers no health plan, the Marketplace, Medicaid and CHIP are the alternatives, and Medicaid and CHIP accept applications all year.
One last habit worth building: keep your enrollment confirmations with your records. If your situation changes midyear, a qualifying life event reopens the enrollment door, and the paperwork moves faster when you know exactly what you signed up for.
Common questions
What happens if I miss my employer’s open enrollment deadline?
You generally keep your current elections or get re-enrolled in the same or a similar plan, and you wait for the next window. A qualifying life event, such as getting married, having a baby or losing other coverage, reopens enrollment.
Is a low premium always the cheaper choice?
No. Low premiums usually come with higher deductibles. If you expect regular care or prescriptions, a higher premium with a lower deductible can cost less by the end of the year.
What is the difference between an FSA and an HSA?
Both are accounts for medical costs. An FSA is an account some employers offer that you fund through automatic payroll deductions, while an HSA is a savings account for qualified medical costs. Your plan documents set the limits and the rules for unused money.
Does the No Surprises Act apply to my job-based plan?
Yes, it covers job-based plans and plans you buy yourself. It protects you from surprise bills for most emergency services, for certain out-of-network care at in-network facilities, and for out-of-network air ambulance services.