This depends on the corporate rules in the jurisdiction you will incorporate the business. In Ontario for instance, at least with numbered Ontario Corporations, only the directors are liable and then there are also limitations on the liability. Of course if it's your own company, you'll probably be one of the directors, since the named directors will usually be the primary shareholders on this type of small company. This liability extends to matters of taxation here as well. Though corporate income is completely separate from personal, including reporting methods/schedules and taxation.

Anyway, there are far more benefits to incorporation besides liability, so it's something wise to look into for your jurisdiction. You might also consider incorporation in a different jurisdiction/country depending on the type of business you'll be conducting and how you'll be collecting funds...