во-первых, это зависит от того. чем вы занимаетесь.
Как частный предприниматель, вы отвечаете своим имуществом. it's for liability purposes. частное предпринимательсто оформить легче и дешевле. Sole Proprietorship. It is the simplest and least expensive format. You, as the owner, receive all the profits and you assume and accept all the risks personally. Really simple!
http://www.sfu.ca/~mvolker/biz/startup.htm
Benefits of Incorporating
When you incorporate a company, remember that all you are really doing is creating a new legal entity - i.e. a new, taxpaying corporate body with its own "soul" and presence. Incorporating a company offers you many advantages, even if you are a one-person business. Some of these advantages are:
# personal liability protection (to a large degree)
# substantial tax advantages (especially when you sell a business)
# a high degree of flexibility in personal financial planning
# greater control in transferring ownership
# easier to bring in outside investors and other partners
# a company survives human death (i.e. may last indefinitely)