Open enrollment forms ask you to pick one small box: Self Only, Self Plus One, or Self and Family. That choice can swing your yearly cost by thousands of dollars. It also decides who gets covered when the doctor bills show up.
Many people just keep what they had last year. That can be an expensive habit, or a risky one. Maybe you got married, had a baby, or your spouse changed jobs.
This guide breaks down FEHB enrollment types in plain English. You'll learn how the tiers differ, what each one costs, and how to match one to your life. Let's dig in.
FEHB Enrollment Types: The Basics
FEHB stands for Federal Employees Health Benefits. It's the health insurance program for most federal workers and retirees. You first pick a plan, such as a Blue Cross option or a HMO. Then you pick your enrollment type, which decides who is covered under that plan.
There are three types:
- Self Only: covers just you.
- Self Plus One: covers you and one eligible family member you choose.
- Self and Family: covers you and all your eligible family members.
Self Plus One is newer. It started in 2013 to give couples and single parents a cheaper middle option.
Who counts as a family member?
Eligible family members include:
- Your legally married spouse
- Children under age 26, including biological, adopted, step, and foster children who live with you
- Children of any age who can't support themselves because of a disability that began before 26
Your unmarried partner doesn't count unless you're legally married. Ex-spouses generally lose coverage after divorce, though some may qualify for "spouse equity" rights.
How the government helps pay
Here's the good news. The government pays about 72% of the average plan premium, up to a cap of 75% of any one plan's cost. You pay the rest through payroll. Most employees pay pre-tax through premium conversion, which lowers your taxable income.
This is one big reason the federal employee health plan options beat many private plans. For current prices, see our guide to FEHB plans and costs for 2026. You can also read about FEHB premium increases.
A quick note on the numbers below: Real premiums differ by plan and by year. I use round example numbers so you can see the pattern. For exact figures, check the OPM FEHB premium tables or use our calculator, covered next.
The Easiest Way to Get Your Exact Numbers
Premium tables are long. Plans have different prices for each tier, and each tier has a different payroll cost. Doing the math by hand takes a while.
The FEHB calculator at IsMyJobWorthIt is the easiest way to get your exact numbers. It's free. It shows your cost by tier, so you can compare options side by side without digging through PDFs. I'll point back to it a few times below.
Self Only vs Self Plus One FEHB: Where the Real Money Is
The jump from Self Only to Self Plus One is where most people feel the pain. Here's why.
Self Plus One doesn't cost "a little more" than Self Only. It often costs more than double. That's because the plan is paying for a second person's medical care.
Here's an example plan with biweekly payroll costs. You pay 26 times a year.
| Enrollment type |
Biweekly cost |
Yearly cost |
| Self Only |
$110 |
$2,860 |
| Self Plus One |
$240 |
$6,240 |
| Self and Family |
$265 |
$6,890 |
Look at the gaps:
- Self Only to Self Plus One: +$3,380 a year
- Self Plus One to Self and Family: +$650 a year
That second gap is small. It's the most surprising part of the whole system.
When Self Only makes sense
Self Only is right if:
- You're single with no kids
- Your spouse has solid coverage through their own job
- Your spouse is on Medicare, TRICARE, or another strong plan
When Self Plus One makes sense
Self Plus One is the right fit if:
- You're married with no kids at home
- You're a single parent with one child
- You have a spouse and kids, but your spouse has their own coverage and you only need to cover one child
Remember that Self Plus One covers only one other person. If you have a spouse and two kids and choose Self Plus One, two people have no FEHB coverage. That's a big gap.
For more on picking the plan itself after you pick the tier, read our Open Season 2026 guide.
Self Plus Family FEHB: When Bigger Coverage Costs Less Than You Think
Let's talk about self plus family FEHB. The official name is "Self and Family." It's the tier many people avoid because the price tag looks scary. But it's often a better deal than people expect.
The "one more person" rule
Think about the example above. Self Plus One costs $6,240. Self and Family costs $6,890. For just $650 more, you cover everyone.
So if you have a spouse and one child, Self and Family covers all three of you for about $650 more than Plus One would cost. Leaving the child out to save $650 is risky. A single ER visit can cost far more than that.
Best FEHB family coverage: what to look for
There's no single "best FEHB family coverage" plan. The best one depends on your family's needs. But here are things to check:
- Doctors: Are your kids' pediatrician and your specialists in the network?
- Out-of-pocket maximum: Family plans have a higher cap. Know what yours is.
- Prescriptions: Check the cost of any drugs your family uses regularly.
- Deductibles: A low premium can mean a high deductible.
- Location: HMOs only work if you live in their service area.
A low-premium plan can cost more overall if your family uses lots of care. A higher-premium plan can save money for a family with regular doctor visits.
Two federal employees in one household
If both spouses work for the government, you can't each have your own plan and also be covered under each other's. Most couples choose one Self and Family enrollment to cover everyone. The other spouse then waives their own enrollment.
Compare your options first. One spouse's plan may cost much less than the other's. Also ask your HR office how this choice affects your right to keep FEHB in retirement. Our guide to keeping FEHB when you retire explains the 5-year rule.
Practical Examples: Real Scenarios With Dollar Amounts
Let's walk through five situations using the example prices from above.
Scenario 1: Single, no kids
Maya is 28 and single. Self Only costs $2,860 a year. That's the only tier she can use. Nothing to decide, except her plan.
Scenario 2: Married, spouse has job coverage
Carlos is married. His wife's employer plan costs her $2,400 a year for Self Only.
- Add her to Carlos's plan (Self Plus One): extra cost is $3,380.
- Keep her on her own plan: cost is $2,400.
Her plan saves about $980 a year. But Carlos should compare coverage too. If her plan has a high deductible or poor networks, FEHB may be worth the extra money.
Scenario 3: Married, no other coverage
Priya and her husband have no other insurance. Self Only would leave him uninsured. Self Plus One costs $6,240. That's $3,380 more than Self Only. It's real money, but private coverage for a spouse usually costs more than that.
Scenario 4: Spouse and one child
Jordan, his wife, and a toddler need coverage.
- Self Plus One: $6,240, but one person is left out.
- Self and Family: $6,890, and all three are covered.
The extra cost is $650 a year, or about $25 per paycheck. Self and Family is the clear pick.
Scenario 5: Single parent, two kids
Dana is a single mom with two kids. Self Plus One covers her and only one child. Self and Family is the only way to cover all three. Cost: $6,890.
What about taxes?
Most FEHB premiums come out before taxes. If you're in the 22% federal bracket, $6,890 in premiums saves you roughly $1,516 in federal income tax. Our tax calculator can show your own savings.
To see your exact premium for your plan and tier, try the FEHB calculator.
Common Mistakes and Misconceptions
Here's where people trip up.
Mistake 1: Thinking Self Plus One covers "me and my family." It covers you and one person. Not two. Not three.
Mistake 2: Staying on Self and Family after kids age out. Coverage for children ends at 26. If your family shrinks, ask HR whether you can move to a cheaper tier. Don't keep paying for coverage nobody can use.
Mistake 3: Waiting for open season after a life change. Marriage, a new baby, adoption, divorce, or losing other coverage are "qualifying life events." You usually have only 60 days to change your tier. Miss it, and you may wait until the next open season.
Mistake 4: Picking Self Only just to save money. If your family needs care, you could pay far more out of pocket.
Mistake 5: Forgetting about other coverage. Military retirees may have TRICARE. Others may have Medicare. Read how FEHB works with TRICARE. Our Medicare and FEHB guide covers retirement.
Step-by-Step: How to Pick Your Tier
Follow these steps and you'll have your answer in about 20 minutes.
- List who needs coverage. Write down you, your spouse, and each child. Check their ages.
- Check outside coverage. Does your spouse have job insurance? What does it cost them? Is it good?
- Count the people. One person: Self Only. Two: Self Plus One. Three or more: Self and Family.
- Get your prices. Use the FEHB calculator, or check the OPM premium tables for your plan.
- Compare the gaps. Look at the difference between tiers, like the $650 gap in our example. Small gaps usually mean "go bigger."
- Estimate your care needs. Think about doctor visits, prescriptions, and planned surgery or births.
- Mark your calendar. Open season runs from the second Monday of November to the second Monday of December. After a life event, you have 60 days.
- Make the change. Do it through Employee Express, your agency's HR system, or Postal Service tools.
- Confirm in writing. Save the confirmation. Check your first paycheck for the new deduction.
Military families should also check TRICARE or Military OneSource. Those who are both a retiree and a federal worker may have more options. For industry news, FedWeek tracks FEHB changes each year, and CMS has Medicare details.
Key Takeaways: The Bottom Line
Here's what to remember:
- Self Only covers just you. Self Plus One covers you and one person. Self and Family covers everyone eligible.
- Self Only to Self Plus One is a big price jump, often thousands a year.
- Self Plus One to Self and Family is often a small jump. With a spouse and kids, Family usually wins.
- Compare your spouse's job coverage before adding them.
- You usually have 60 days after a life event to change tiers.
- Review your tier every year at open season.
The right tier depends on your family, your health needs, and your other coverage. But you don't have to guess. Try the calculator to see your personal results, then check the details on OPM's FEHB page. For more help, browse our benefits guide.