Benefits language is a dialect nobody teaches. Every fall, millions of people are asked to make four-figure decisions using words they have never had defined: deductible, coinsurance, vesting, formulary. So they guess, or they ask HR, or they pick whatever they picked last year.
This glossary defines the 45 terms your team actually encounters, in the language you would use explaining them to a friend. Bookmark it, link it from your benefits guide, or send a section to the next person who asks.
Health plan types
The acronyms on the front of the plan booklet. They describe how much freedom you have in choosing doctors, and what the plan expects from you in exchange.
- PPO (Preferred Provider Organization)
- A health plan with a network of preferred doctors and hospitals that lets you see providers outside that network for a higher cost, usually without a referral. PPOs trade higher premiums for flexibility: you can see a specialist directly, and out-of-network care is covered at a reduced rate instead of not at all.
- HMO (Health Maintenance Organization)
- A health plan that covers care only from doctors and hospitals inside its network, except in emergencies. You typically choose a primary care physician who coordinates your care and refers you to specialists. HMOs usually cost less per paycheck than PPOs in exchange for that tighter network.
- EPO (Exclusive Provider Organization)
- A middle ground between an HMO and a PPO: you must stay in network (like an HMO), but you usually do not need referrals to see specialists (like a PPO). Out-of-network care is generally not covered outside emergencies.
- POS (Point of Service) plan
- A plan that blends HMO and PPO features. You pick a primary care physician and need referrals for specialists, but you can go out of network at a higher cost. The name comes from choosing how to use the plan at the point of service, each time you get care.
- HDHP (High-Deductible Health Plan)
- A plan with lower premiums and a higher deductible than a traditional plan, meaning you pay more out of pocket before coverage kicks in. HDHPs matter for one big reason: they are the only plan type that lets you contribute to a Health Savings Account (HSA).
What care costs
The words that decide what actually comes out of your bank account when you use your insurance.
- Deductible
- The amount you pay for covered care each year before the plan starts sharing costs. If your deductible is $2,000, you pay the first $2,000 of most non-preventive care yourself. Preventive care is typically covered before the deductible, and the deductible resets every plan year.
- Copay
- A fixed dollar amount you pay for a specific service, like $25 for a primary care visit or $10 for a generic prescription. Copays are predictable by design: the price is printed on the plan, and it is the same every time.
- Coinsurance
- The percentage of a bill you pay after meeting your deductible. With 20% coinsurance, the plan pays 80% of the allowed amount and you pay 20%, until you hit your out-of-pocket maximum. Unlike a copay, coinsurance scales with the size of the bill.
- Out-of-pocket maximum
- The most you can pay for covered, in-network care in a plan year, adding up your deductible, copays, and coinsurance. Once you reach it, the plan pays 100% of covered costs for the rest of the year. It is the number that tells you your true worst-case year.
- In-network vs out-of-network
- In-network providers have agreed to your plan’s negotiated rates. Out-of-network providers have not, so the plan covers less of the bill or none of it, and the provider can charge you the difference. Checking network status before an appointment is the single cheapest habit in healthcare.
- Allowed amount
- The maximum your plan agrees a covered service is worth. Your deductible and coinsurance are calculated from this negotiated number, not from the provider’s sticker price. It is why an EOB can show a $400 charge “allowed” at $180.
- EOB (Explanation of Benefits)
- The statement your insurer sends after a claim showing what the provider billed, what the plan allowed, what it paid, and what you may owe. It is not a bill. Compare it against the provider’s actual bill before paying anything.
- Prior authorization
- Approval your plan requires before it will cover certain services, procedures, or medications. Skipping it can turn a covered service into a denied claim, so when a doctor orders something unusual, ask whether prior authorization is needed and who is filing it.
- Formulary
- Your plan’s list of covered prescription drugs, organized into tiers that determine your cost. Generic drugs sit in the cheapest tier; specialty drugs in the most expensive. If a medication is not on the formulary, you pay full price or request an exception.
- Balance billing
- When an out-of-network provider bills you for the gap between their charge and what your plan paid. Federal law protects you from surprise balance bills in emergencies and at in-network facilities, but planned out-of-network care can still generate them.
Tax-advantaged accounts
Accounts that let you pay for care, dependents, or commuting with money that is never taxed. The differences between them decide whether the money is yours to keep.
- HSA (Health Savings Account)
- A personal savings account for medical expenses, available only if you are enrolled in a high-deductible health plan. Money goes in pre-tax, grows tax-free, can be invested, and comes out tax-free for qualified expenses. It is yours forever: it rolls over every year and follows you when you change jobs. The IRS sets an annual contribution limit.
- FSA (Flexible Spending Account)
- An employer-owned account you fund pre-tax for medical expenses, available with any plan type. The full year’s election is available on day one, but FSAs are use-it-or-lose-it: unspent money is forfeited at year end, beyond any small carryover or grace period your employer offers. The account stays behind when you leave the company.
- Limited-purpose FSA
- An FSA restricted to dental and vision expenses, designed to pair with an HSA. It lets you keep HSA eligibility (which a general FSA would break) while still paying for braces, glasses, and cleanings with pre-tax money.
- Dependent care FSA
- A pre-tax account for care that lets you work: daycare, preschool, after-school programs, summer day camp, and adult day care for a dependent. It is separate from your medical FSA, and unlike the medical version, funds are only available as they are deducted from your paychecks.
- HRA (Health Reimbursement Arrangement)
- An employer-funded account that reimburses you for qualified medical expenses. Only your employer contributes, the employer sets the rules, and the money generally stays behind when you leave. Think of it as your employer sharing your deductible risk.
- Commuter benefits
- Pre-tax accounts for the cost of getting to work: transit passes, vanpools, and qualified parking. The IRS sets monthly limits, and elections can usually be changed month to month, unlike most benefits.
Enrollment and eligibility
The rules that decide when you can sign up, change coverage, or keep it after something changes.
- Open enrollment
- The annual window when you can enroll in, change, or drop benefits for the coming plan year. Outside this window, you are locked into your choices unless you have a qualifying life event. It is the one deadline in benefits that affects every employee, every year.
- QLE (Qualifying Life Event)
- A life change that opens a mid-year enrollment window: marriage, divorce, a new baby or adoption, losing other coverage, or certain moves. You typically have 30 days from the event to make changes, and documentation is usually required.
- Special enrollment period
- The window, usually 30 days, that a qualifying life event opens. During it you can add dependents, switch plans, or enroll if you previously waived coverage. Miss it and you wait for the next open enrollment.
- Waiting period
- The stretch between your hire date and the day your benefits become effective, commonly the first of the month after your start date. Until it ends, you are not covered by the employer plan, which is worth knowing before scheduling anything expensive.
- Dependent
- A person you can cover on your plan, typically your spouse or partner and your children up to age 26. Enrolling a dependent usually requires documentation like a marriage or birth certificate, and dependents can only be added mid-year after a qualifying life event.
- COBRA
- A federal law that lets you keep your employer health coverage after leaving a job or losing eligibility, usually for up to 18 months. You pay the full premium yourself plus a small administrative fee, which is why COBRA feels expensive: you are finally seeing the whole price your employer had been sharing.
- EOI (Evidence of Insurability)
- A health questionnaire an insurer can require before approving certain coverage amounts, most often supplemental life insurance elected after your first eligibility window. Electing coverage when first eligible usually lets you skip EOI up to a guaranteed amount.
- Beneficiary
- The person or people who receive your life insurance or retirement account balance if you die. Beneficiary designations override your will, so the single most important five minutes in benefits is keeping them current after marriages, divorces, and births.
Income protection and leave
The benefits that replace your paycheck when life interrupts work. Widely offered, rarely explained.
- Short-term disability (STD)
- Insurance that replaces part of your income, commonly 60% or so, when a non-work injury, illness, surgery recovery, or childbirth keeps you from working for weeks to months. There is usually a short waiting period before payments start, and benefits are capped at a set number of weeks.
- Long-term disability (LTD)
- Insurance that continues income replacement when a disability lasts beyond short-term coverage, potentially for years. It is the quiet backbone of financial protection: statistically more likely to be used than life insurance during a working career, and far less understood.
- Basic life insurance
- Employer-paid life insurance, often one or two times your salary, provided at no cost to you. It is a floor, not a plan: enough to matter, rarely enough for a family that depends on your income.
- Supplemental life insurance
- Additional life insurance you can buy through work, on top of the basic employer-paid amount, often for yourself, your spouse, or your children. Electing it when first eligible usually avoids the health questionnaire (evidence of insurability) up to a guaranteed issue amount.
- AD&D (Accidental Death & Dismemberment)
- Insurance that pays a benefit if you die or lose a limb, sight, hearing, or speech in an accident. It pays on top of regular life insurance for accidental causes, but it is not a substitute for it: illness, the more common cause of death, is not covered.
- FMLA (Family and Medical Leave Act)
- The federal law giving eligible employees up to 12 weeks of unpaid, job-protected leave per year for serious health conditions, a new child, or caring for close family. FMLA protects your job and your health coverage while you are out; it does not by itself pay you. Pay during leave comes from disability insurance, paid leave policies, or state programs.
Retirement and everyday extras
The rest of the package: the accounts building your future and the perks hiding in plain sight.
- 401(k)
- An employer-sponsored retirement account funded straight from your paycheck. Traditional contributions go in pre-tax and are taxed at withdrawal; the IRS sets annual contribution limits and penalties for early withdrawal. It is the default engine of American retirement saving.
- 401(k) match
- Money your employer adds to your 401(k) based on what you contribute, for example 50 cents per dollar on the first 6% of pay. Contributing below the full match threshold leaves guaranteed compensation on the table, which is why “get the full match” is the one piece of near-universal financial advice.
- Vesting
- The schedule that determines when employer contributions to your retirement account become permanently yours. Your own contributions are always 100% yours; employer matches may vest gradually over several years. Leaving before you are fully vested forfeits the unvested portion.
- Roth 401(k)
- A 401(k) option where contributions go in after tax, so qualified withdrawals in retirement, including the growth, come out tax-free. The traditional-vs-Roth choice is a bet on whether your tax rate is higher now or later.
- EAP (Employee Assistance Program)
- A free, confidential benefit that helps with life problems before they become crises: several no-cost counseling sessions, plus help with legal questions, financial stress, childcare and eldercare referrals, and more. Typically available to your household, not just you, and used by far fewer people than it could help.
- Voluntary benefits
- Optional coverage you can buy at group rates through payroll: accident, critical illness, and hospital indemnity insurance, pet insurance, identity protection, and legal plans. They pay cash benefits for specific events and fill gaps that medical insurance leaves open.
The technology behind your benefits
Three terms that now show up in benefits apps, vendor decks, and government documents, and what each one actually promises.
- AI (artificial intelligence)
- Software that produces answers, summaries, and translations from data, including the large language models behind benefits assistants and chatbots. In benefits, the useful question is not whether a tool uses AI but what it answers from: your approved plan documents, or general knowledge that may not match your plan.
- SI (super intelligence)
- The term United States federal documents use for artificial intelligence as of September 2026, when the government announced it would replace “artificial” with “super” in official usage. It refers to the same technology as AI: an SI benefits assistant and an AI benefits assistant are the same kind of tool. In research, “superintelligence” historically meant a hypothetical system smarter than humans at everything, which is not what the federal usage describes. SI vs. AI, explained
- Source-grounded
- Describes an AI (or SI) assistant that answers only from a defined set of approved documents, such as your plan summaries and benefits guide, rather than from general knowledge. A source-grounded assistant can point to where an answer came from and is designed to say when the documents do not cover a question, instead of guessing.
When a definition is not enough
A glossary answers “what does this word mean.” It cannot answer “what is MY deductible” or “is my doctor in MY network,” because those answers live in your specific plan documents. That second kind of question is why we built Ask Tobie: it answers from the documents your employer approved, with sources shown.
Tobie turns the benefits guide you already have into a branded, year-round employee experience: plain-English content, explainer videos, and a source-grounded assistant. Want your own benefits explained this clearly? Talk with us.