If your company is a single-member LLC, you are considered a "disregarded entity" and disregarded entities must provide the owner's SSN instead of the company's EIN. I dislike the idea of having to put my SSN on my W-9 because every contractor I do work for would have my SSN. I contacted the IRS about this and as a way to avoid this and they said I can get a sole-proprietorship EIN and use that on the W-9 instead. (According to the IRS agent, there are 2 #'s attached to your personal name - SSN & sole proprietorship EIN, which is why you can use this in place of your SSN.) Has anyone done this? Has it caused any problems come tax time or any other time?