✔ 最佳答案
401k allows you to put money aside for retirement savings on a pre-tax basis, so you don't pay income tax on the money you put into it. This is done through your employer and your contributions are taking directly out of each paycheck automatically so it doesn't rely on you to remember to make the contributions.
Some plans also offer a "ROTH" 401k option which isn't pre-tax, so you don't save money on income taxes, but in the end when you withdraw the money you won't owe tax on it.
If you work for a government agency, including local schools, parks departments, or similar then the plan would be called a 403B, its basically the same thing as a 401k.
If your employer does not offer these options then you can go to any investment broker or bank and open a personal retirement account called an IRA.
A traditional IRA gives the same pre-tax benefit of a 401k, and a ROTH IRA gives the same benefits of a ROTH 401k with no tax owed on the growth.