A week or two into your first job, an email lands: "Open enrollment closes Friday — make your benefits elections." Attached is a PDF full of acronyms (HSA, PPO, HDHP, 401k) and dollar amounts that don't quite add up. It's overwhelming, and the deadline makes it worse. Take a breath — this lesson walks through what those choices actually are, in plain English, so you can decide with a clear head.
What "open enrollment" even means
Open enrollment is a window — usually a week or two — when you choose your benefits for the year ahead: health insurance, retirement contributions, and any extras your employer offers. Outside that window, you generally can't change most elections until next year, unless you have a qualifying life event (marriage, a new baby, losing other coverage).
New hires get their own enrollment window when they start. Two decisions usually matter most: your retirement contribution and your health insurance. Let's take them in order of "how much free money is on the table."
The 401(k) match: genuinely free money
A 401(k) is a retirement account funded straight from your paycheck, before taxes. The headline feature for a new employee is the employer match: many companies add their own money to your account based on what you contribute.
A common formula is "100% match on the first 4%." In plain terms: for every dollar you put in, up to 4% of your salary, your employer puts in a dollar too.
| Your contribution | Employer adds | Total going into your account |
|---|---|---|
| 0% | 0% | 0% — you leave the match on the table |
| 2% of salary | 2% | 4% |
| 4% of salary | 4% | 8% — the full match captured |
| 6% of salary | 4% (capped) | 10% |
Look at the 4% row. You contribute 4%, and your account grows by 8%. That employer 4% is an instant 100% return — money no investment can reliably promise. Educationally, this is why so many people describe "contributing at least enough to get the full match" as the first thing they do: skipping it is mathematically like turning down part of your salary.
Health insurance, without the jargon
The other big election is health insurance. The acronyms scare people off, but they describe a single trade-off: pay more every month, or pay more when you actually need care.
| Term | What it means |
|---|---|
| Premium | What you pay every paycheck just to have the plan |
| Deductible | What you pay out of pocket before insurance starts covering costs |
| Copay | A flat fee for a visit or prescription (e.g. $25 to see a doctor) |
| Out-of-pocket max | The most you'll pay in a year — after this, insurance covers 100% |
The general pattern: a plan with a low premium usually has a high deductible (cheap monthly, expensive if you get sick), and a plan with a high premium usually has a low deductible (pricier monthly, cushioned if you need care). Neither is "better" in the abstract — they suit different situations, which is why this is a personal call, not a one-size answer.
HSA and FSA — the tax-advantaged add-ons
Two more acronyms often appear next to health plans:
- An HSA (Health Savings Account) pairs with a high-deductible plan. You put in pre-tax money for medical costs, it rolls over year to year, and it's yours to keep even if you leave the job.
- An FSA (Flexible Spending Account) is similar but typically use-it-or-lose-it within the year and tied to your employer.
Both let you pay for healthcare with pre-tax dollars — the same small "pre-tax discount" idea from your first paycheck.