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How to choose a good 401(k) investment option?
There are not as many options here as you fear. If you have no other investments outside this 401K it is even easier. Outside accounts include IRA, Roth IRA, taxable investments (mutual funds, ETF, individual stocks), Employee stock purchase plans. Amount: make sure you put enough in to get all the company match. I assume that in your case the 9% will do so, but check your documents. The company match will be with pre-tax funds.  Roth vs Regular 401K? Most people in their lifetime will need a mix of Roth and Regular retirement accounts. You need to determine if it is better for you to pay the tax on your contributions now or later. Which accounts? If you are going to invest in a target date fund, you can ignore the rest of the options. The target date fund is a mixture of investments that will change over the decades. Calculate which one fits your expected retirement date and go with it. If you want to be able to control the mix, then you will need to pick several funds. The selection depends on what non-401K investments you have. Now here is what I considered the best advice.  Decide Roth or regular, and just put the money into the most appropriate target date fund with the Roth/regular split you want. Then after the money starts flowing into your account, research the funds involved, the fees for those funds, and how you want to invest. Then move the money into the funds you want. Don't waste another day deciding how to invest. Just get started. The best part of a 401K, besides the match, is that you can move money between funds without worrying about taxes. If you realize that you want to put extra emphasis on the foreign stocks, or Mid-cap; just move the funds and redirect future contributions.