Thinking of Switching Jobs? It Could Hurt Your 401(k)
Social Security probably won't pay you enough for a comfortable retirement. To achieve that goal, you'll need to save independently.
If your employer offers a 401(k) plan, that's definitely a good place to start. Though 401(k)s aren't perfect, they offer a few distinct benefits over IRAs.
First, they come with much higher annual contribution limits. Right now, with an IRA, you're limited to $6,000 a year if you're under age 50. Otherwise, your annual limit is $7,000. With a 401(k), you can contribute up to $20,500 this year if you're under age 50. If you're 50 or older, you get a $6,500 catch-up option that raises that limit to $27,000.
Source Fool.com