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Can I withdraw from my Roth IRA retirement account to fund a startup?
Chris's answer is a great start. Keep in mind that when you withdraw from a Roth IRA, you "shrink" the size of the IRA (i.e. if the start up flourishes, you can't put the $10k you withdrew back, as you're limited to ~$5k in contributions per year). You may want to consider funding your startup with a credit card (ideally a balance transfer of $10k at 0% interest).  If you need to, you can always pay your card off with your Roth balance, but if the startup takes off, your IRA is unharmed. (On a side note, I wouldn't feel comfortable quitting my job to do a startup with only $10k in savings, but to each his own!)