A 401(k) is the most common workplace retirement account, and for many people it is the center of their retirement saving. Its mechanics are worth understanding, and one feature in particular, the employer match, is close to the only free money most people are ever offered.
A 401(k) lets you contribute a portion of your paycheck to a retirement account with tax advantages. Traditional 401(k) contributions are pre-tax, reducing taxable income now and taxed on withdrawal; many plans also offer a Roth 401(k) with after-tax contributions and tax-free qualified withdrawals. The money is invested in options the plan offers, and grows over your career. Annual contribution limits apply and change over time.
Many employers match a portion of what you contribute, for example, matching your contributions up to a set percentage of salary. This is an immediate, guaranteed return on your own contribution that no investment can reliably promise. Not contributing enough to capture the full match is leaving compensation on the table, which is why the common guidance is to contribute at least enough to get the entire match.
Employer matching contributions may vest over time, meaning you earn full ownership of them after a period of employment. Beyond the match, the power of a 401(k) is decades of tax-advantaged compounding, which rewards starting early and contributing consistently. It is a long game, and time in the plan is one of its biggest advantages.
Capture the whole match. It is a return nothing else guarantees.
This is general educational information, not personalized investment, tax, or legal advice. Consult a qualified professional about your situation.