The match is part of your compensation.
If your employer offers a match (commonly something like 50% of the first 6% you contribute), that match is part of your compensation. Failing to capture it is the equivalent of declining a portion of your paycheck. The most common move that pays off is contributing enough to receive the full match, before optimizing anywhere else.
Vesting matters when you change jobs.
Your own contributions are always 100% yours. Employer contributions, including the match, may be subject to a vesting schedule, the rules that determine how much of the employer's money you keep if you leave. Common schedules are graded vesting (e.g., 20% per year over five years) or cliff vesting (e.g., 100% after three years, 0% before). Knowing where you are on the schedule can affect timing decisions around a job change.
Where the money is invested matters more than most people think.
Employer plans usually offer a curated menu of investment options, target-date funds, broad index funds, sometimes specialty funds. The default selection is often a target-date fund, and that's a reasonable starting place for many people. But target-date isn't always the right answer, and the specific funds in the plan vary significantly in cost. A 0.85% expense ratio versus 0.05% on the same exposure compounds to a meaningful difference over decades. Knowing what you own and what it costs is a small move that pays off.
When you leave the job, you have options.
When employment ends, you generally have four choices for the balance: leave it in the old plan (often allowed if the balance is above a threshold), roll it into the new employer's plan, roll it into an IRA, or take a distribution (which usually triggers tax and an early-withdrawal penalty). Each option has trade-offs around investment selection, fees, creditor protection, and access. The right choice depends on the specifics of both plans and the rest of your situation.
Roth vs. Traditional contributions.
If your plan offers both Roth and Traditional contribution types, the question is whether to pay tax now (Roth) or pay tax later (Traditional). The right answer depends on what tax bracket you're in now versus what you expect to be in during retirement, plus a number of secondary considerations around RMDs, estate planning, and tax diversification. Both have their place; many people benefit from contributing some of each.
Common mistakes worth avoiding.
Not contributing enough to capture the full match. Leaving the default investment in place without ever revisiting it. Cashing out a small balance instead of rolling it over when changing jobs. Borrowing from the plan and not repaying. Taking an early withdrawal in a financial emergency without considering alternatives. None of these are catastrophic on their own, but they accumulate.
The bottom line.
Your employer-sponsored plan is rarely the most exciting financial tool in the toolkit, but it's almost always the most important. Spend an afternoon understanding yours, the contribution rate, the match, the vesting schedule, what you own, and what it costs, and most of the high-leverage decisions follow naturally.
Important: This article is provided for educational purposes only and does not constitute investment, tax, legal, or accounting advice. Plan-specific rules vary by employer; consult your plan documents and tax professional for guidance on your situation. Investing involves risk, including possible loss of principal.