“Contribute up to your employer match” is the single piece of personal finance advice that almost everyone hears and almost everyone gets right. It is free money. It is probably a 50% or 100% instant return on your contribution. You would be foolish to skip it. Fine. But the conversation usually stops there, and the stopping is where people leave tens of thousands of dollars on the table over a career.

We have sat with friends and family through four different versions of this mistake: the vesting surprise, the front-loading penalty, the Roth-vs-Traditional confusion on the match itself, and the order of operations after the match is captured. Each one is individually small. Together they add up to real money.

Subtlety 1: Vesting schedules decide whether the match is actually yours

A “vested” dollar is one you get to keep if you leave the company. An unvested dollar is one the employer can reclaim. You, the employee, always vest immediately in your own contributions. The employer match is the part that can be clawed back, and the mechanism is the vesting schedule.

There are two common designs. The first is a cliff schedule: you are 0% vested in the match until a specific anniversary, usually three years, at which point you become 100% vested all at once. Leave on month 35 and you forfeit the entire match. The second is a graded schedule: you vest in chunks over several years, typically 20% per year over five or 25% per year over four.

We know someone who left a well-known consumer tech company at 2 years and 10 months. Their employer match had accumulated to roughly $18,400, with growth. The vesting schedule was a three-year cliff. They walked away with $0 of the match. The exit was a reasonable career move and paid off in other ways, but if they had known the cliff date was eight weeks out, they would have almost certainly waited.

Before you accept an offer or hand in a resignation, look up the vesting schedule for the match. It is on the Summary Plan Description, not usually the offer letter.

Ask HR directly, in writing: “What is the vesting schedule for the employer 401(k) match?” and “What is my current vested percentage?” This takes five minutes and occasionally reveals that you are two months away from a substantial number.

Subtlety 2: True-up rules and why front-loading can backfire

Front-loading your 401(k) means contributing aggressively at the start of the year to hit the annual limit early. The reasoning is that money in the market earlier has more time to compound. For people who can afford it, this is usually a sound move. Except when it silently costs you the match.

Here is how most matches work: the match is calculated per pay period, not per year. If your employer matches 100% up to 5% of salary, they match each paycheck's contribution up to 5% of that paycheck. If you hit the annual contribution limit in June, you stop contributing for the rest of the year. The match stops with you. The employer does not owe you the second-half matches because you did not contribute in the second half.

This is where a “true-up” provision matters. Some plans true up: at year end, they calculate what you would have received if you had contributed steadily, compare it to what you actually got, and pay the difference. Many plans do not. The only way to know is to read your plan document.

A rough example. Salary of $150,000, 5% match, front-loaded to hit the limit in July:

Scenario A: No true-up (plan does not offer)
  Jan-July contributions:         $23,000 (hit annual limit)
  Jan-July match received:         $3,750
  Aug-Dec contributions:               $0 (already maxed)
  Aug-Dec match received:              $0
  Total match for the year:         $3,750

Scenario B: Evenly spread contributions
  Per-paycheck contribution rate:   ~15% of salary
  Total annual contribution:       $23,000
  Total match received:             $7,500
  Difference:                       $3,750 lost per year

Over a ten-year stretch, that is $37,500 in missed match dollars before any market growth. Compounded at 7%, it is closer to $55,000. The fix is simple: if your plan does not true up, spread your contributions across all pay periods. If it does true up, front-load all you want.

Subtlety 3: The match is always pre-tax, even if your contribution is Roth

Many plans now let you choose Roth 401(k) instead of Traditional for your own contribution. This does not change how the match works. By IRS rule, the employer match goes into a pre-tax Traditional bucket regardless of which type of contribution you are making.

This surprises people. Someone will tell us they are doing 100% Roth and assume all the money in their account is Roth. Then they look at their statement and see two line items: a Roth sub-account (their contributions) and a Pre-Tax sub-account (the match and its growth). Different tax treatment on withdrawal. Different rules for the five-year clock. Different considerations for Roth conversions later.

A few plans have recently started offering a Roth match, enabled by SECURE 2.0, but adoption is still limited and it requires you to elect it and pay the tax on the match the year it is made. Most people will see a pre-tax match for the foreseeable future. Plan accordingly, which mostly means understanding that your retirement tax picture is a blend, not the single bucket your contribution election implies.

Subtlety 4: The right order of operations after the match

Capturing the match is step one. The mistake is treating the 401(k) as the only vehicle and dumping everything there. There is a consistent order we use with friends who ask:

  1. 401(k) up to the full match. Always first. Instant return.
  2. High-interest debt. Anything above ~7%. Nothing else competes with guaranteed double-digit returns from paying it off.
  3. HSA, if eligible. The only triple-tax-advantaged account in the US code: deductible going in, tax-free growth, tax-free on qualified medical withdrawals. Contribute the full family or individual limit if you can.
  4. Roth IRA. Up to $7,000 a year ($8,000 if 50+). Opened at Fidelity, Schwab, or Vanguard in an afternoon. Fund it with broad index funds like FXAIX, VTSAX, or SWTSX.
  5. Back to the 401(k) to fill the rest of the employee contribution limit ($23,500 in 2026, plus catch-up if eligible).
  6. Taxable brokerage if you still have cash to invest after all that.

The HSA step is the one people skip. If you are on a high-deductible health plan, the HSA is the most tax-efficient account available to you. Pay medical expenses out of pocket, keep the receipts, let the HSA money grow invested for decades, and reimburse yourself at any point in the future, tax-free. At Fidelity the HSA has no account fees and you can invest in the same index funds you would use in a brokerage.

Checking your plan in fifteen minutes

Before you do anything, look up the following on your plan provider portal or Summary Plan Description. This is a fifteen-minute task that pays for itself many times over:

[ ] Match formula (e.g., 100% of first 3%, 50% of next 2%)
[ ] Match cap (what's the dollar or percent ceiling?)
[ ] Vesting schedule (cliff or graded? how many years?)
[ ] Current vested percentage (today)
[ ] True-up offered? (yes/no)
[ ] Roth 401(k) option? (yes/no)
[ ] Roth match option per SECURE 2.0? (rare)
[ ] In-plan conversions allowed? (for mega-backdoor, if applicable)
[ ] Expense ratios of the index fund options (should be <0.10%)

If the fund options are expensive (anything over 0.50% for an index fund is expensive), use the 401(k) up to the match, then move the rest of your tax-advantaged savings to an IRA where you control the fund selection.

What we'd actually do

This week: log into your 401(k) portal, pull the plan document, and check the four things that actually matter. The vesting schedule, whether there is a true-up, the match formula, and the expense ratios on the fund you are using. Write the answers in a note on your phone so you do not have to look them up again.

If your plan does not true up, change your contribution rate so the money spreads evenly across all pay periods. This almost always means lowering your percentage, because most people who front-load do it by setting a high number and letting it cap. Set the rate so your per-paycheck contribution, multiplied by the number of paychecks in the year, hits whatever target you want, not the annual maximum by July.

If you are within a year of a cliff vest and considering leaving, get the exact vesting date in writing and factor it into the decision. Sometimes it is worth leaving early anyway. Sometimes eight more weeks is worth $18,000. You cannot make that call without the number.