401(k) Plan

A US employer-sponsored retirement account where workers contribute part of their paycheck, often pre-tax, sometimes with employer matching.

A 401(k) plan is a US employer-sponsored retirement savings account that lets employees set aside part of their paycheck for long-term investing. Contributions are typically made on a pre-tax basis in traditional 401(k)s, which can lower current taxable income, while Roth 401(k) contributions are generally made after tax, with different tax treatment at withdrawal. Many employers also offer matching contributions, which can boost an employee’s retirement savings.

How a 401(k) works

In a typical workplace plan, an employee elects a contribution percentage that is automatically deducted from each paycheck and invested in the options offered by the plan. Those options often include diversified funds such as target-date funds and broad index funds. Because the account is designed for retirement, withdrawals are generally restricted until a later age, and early withdrawals can involve taxes and penalties, depending on the circumstances.

Employer matching is a key feature in many plans. For example, an employer might match a portion of an employee’s contributions up to a certain percentage of salary, effectively adding extra compensation earmarked for retirement. Vesting rules may apply, meaning the employee may need to stay at the company for a period of time to keep the full employer match.

Where cryptocurrency fits in

Some policymakers and plan providers have explored whether defined contribution retirement participants should be able to access cryptocurrency exposure inside a 401(k). When offered, this exposure may come through specific investment products made available in the plan’s lineup rather than direct self-custody of coins. Crypto can be viewed as a diversification tool, but it also introduces unique risks, including high volatility, custody and operational considerations, and evolving regulatory expectations.
Understanding 401(k) plans matters in crypto because retirement accounts are a major gateway for mainstream investors, and decisions about whether and how crypto appears in these plans can shape adoption, risk management, and long-term participation in [glossary slug="digital-asset" title="digital asset"] markets.