The 401(k) match — don't leave free money behind

The situation

The enrollment screen asks one question: “Contribution percentage: ____%.” Next to it, a line you might scroll past: “Employer match: 100% of the first 4% of eligible pay.” You’re starting out, retirement feels like another planet, and every dollar of your paycheck already has a job. Here’s the number that should decide this screen.

The idea

A 401(k) match is your employer adding money to your retirement account based on what you put in, up to a limit. On our anchor’s plan — a common shape — the formula is 100% of the first 4% of salary: for every dollar you contribute, the employer contributes another dollar, until your contributions reach 4% of your pay.

Read that again, because it’s the best deal in this entire course: a dollar in becomes two dollars, instantly.

Phase 6 taught the snowball — compound interest doubling your money over years (Rule of 72: about 12 years at 6%). The match doubles your money the moment it lands. It’s not a market bet, not a rate you shop for — it’s part of your compensation, and the only way to collect it is to contribute.

Two mechanics worth knowing:

• Your contribution comes out pre-tax (it’s one of the deduction lines from lesson 2.2), so contributing $73.85 shrinks your take-home by less than $73.85 — the tax break covers part of it. The next lesson (10.3) covers the traditional-vs-Roth wrinkle.
• Vesting: your own contributions are always 100% yours, but the employer’s money may become permanently yours only over time — for example, a quarter per year of service. That schedule is called vesting. Check yours, especially before changing jobs.

The rule: always contribute at least enough to get the full match. Even when the budget is tight, this is the last line to cut — cutting it is a pay cut.

Here’s the whole machine, including the stage most people never hear about:

flowchart LR
  accTitle: How a 401(k) match works, and what happens if you skip it
  accDescr: The match only exists when you contribute. If you contribute from each paycheck, your employer adds their match on top, up to the limit in your plan's formula, and both amounts land in your 401(k). The employer's share then becomes permanently yours on a vesting schedule, while your own contributions are yours from day one. If you contribute nothing, the employer adds nothing, and that is pay you earned but never collected.
  Q{"Do you contribute from your paycheck?"}
  Q -->|"Yes"| C["Your contribution, out of each check, before tax"]
  C --> M["Employer match: they add a dollar for every dollar you put in, up to the limit in your plan's formula"]
  M --> L["Both amounts land in your 401(k)"]
  L --> V["Vesting: your own contributions are yours immediately, but the employer's share may become permanently yours only over time"]
  Q -->|"No"| N["No match at all — the employer adds nothing, and there's no catching up later. It's pay you earned and never collected"]

By the numbers

The anchor: $48,000 a year, paid biweekly, employer matches 100% of the first 4%.

Line	Per year	Per month
You contribute 4%	$1,920	$160
Employer match (100% of it)	+$1,920	+$160
Landing in your 401(k)	$3,840	$320

Per paycheck, your share is $1,920 ÷ 26 biweekly checks = $73.85 — about $74 of each check, and because it goes in pre-tax, your take-home drops by less than that.

Now the other side of the ledger. Contribute 0% and the employer adds $0: that’s $1,920 a year of pay you earned but never collected — this year, next year, every year you skip it. Nothing else in your budget leaks money that fast.

One housekeeping number: for 2026 the IRS caps what you can put into a 401(k) at $24,500 of your own money — at $1,920 a year, you’re nowhere near it. The cap isn’t a first-job problem; collecting the match is.

Where this fits

Getting the match is decision one, and it doesn’t depend on anything else. Decision two is the dropdown right next to it — traditional or Roth? — which is entirely about when the tax hits. That’s the next lesson.