Generally you can put in as much as you want but they only provide matching for some percentage. Usually like 1-5%. There is a total contribution limit but that won't affect most people.

You can put however much you want in. Max is like 22k a year. You're probably thinking match, ya basically no company will match 15%.

That'd be too close to a pension fund or something reasonable. We can't have that. The boomers said those were bad, raegonomics are good. Fuck pensions and unions.

You can put in however much you want, the company only matches up to a certain low percent though. Typically less than 5%. I personally put 17% of my income into my 401k since I didn’t do anything for about a decade that I should’ve been doing 10% and now I’m trying to catch up, company only matches 3%

The limits on 401k contributions are federally regulated and are set as a nominal amount.

Employers often have employees select a percentage of their income to contribute, and for very high income earners, 15% might be over the federal limit. Also, employers can match employee 401k contributions. That is usually a percentage match of annual salary up to a given limit (e.g. 2% of salary up to $3000).

Any company that pays you less than $150,000.

The company I work for just moved up to 30% of your paycheck. But they don't really match. They say they do, but the max they will match is $750 per year.