Is it wise to take out some of your 401k - for investment?

I have project that will return 50% profit in two years time frame. I know that I will get hite by at least 30%. Help!!

10% penalty plus taxes...so, yeah, at least 30% penalty.

Project returns 50%....which will be taxable, right? So, if you are in 25% bracket, you lose 25% of your return...so, now you are down to a net gain of 37 1/2%.
So, it costs 30% to access your money to make a 37 1/2% return....
therefore...
you net 7 1/2% return. My guess is....you stand a decent chance of making 7 1/2% INSIDE the 401/k and saving yourself all the hassle of moving the $$ around.

You are better off taking a loan out than withdrawing from your 401K.

On a loan you have a longer time frame to pay it back.

The taxes on a withrawl from 401K, as well as the potential profit loss because of the it, is not worth it.

No, it's not smart. The only time you should take out from your 401(k) is to mitigate the damage from an emergency.

Most 401K's allow you to borrow from them. Most will only let you borrow 50% of what you have contributed and pay back at a reasonable interest rate. A few 401K's actually take the interest you're paying on your loan and invest that as your money too. So, in essence, you are your own bank and making money on yourself.

No, once you start you won't stop and your retirement will be screwed.

I did it. I regret it. Don't do it.
(BTW: What returns 50% profit in 2 years??????)