One of the most significant advantages of incorporating is the ability to take advantage of the tax deferral strategies. The income earned within corporation is taxed at two different levels – once at corporate level and again at personal level when the income is distributed either as salary or dividend to the shareholder. The taxable income earned within a corporation from operating business, if considered active business income (ABI) for tax purposes, is subject to general federal corporate rate (15%) and applicable provincial corporate tax rates.
Further, if your corporation is considered a Canadian Controlled Private Corporation (CCPC) throughout the year, your corporation may benefit from Small Business Deduction (SBD), which lowers the tax rate to 9% on the first $500,000 of active business income (ABI). All provinces and territories also provide an SBD and have a small business limit of $500,000, except for Manitoba which has a limit of $450,000.
While the combined corporate federal and provincial general rate and small business tax rates vary by province and territory, the corporate tax rate on business income is generally lower than your personal marginal tax rate.
After incorporation, you can defer personal taxation on after tax business income until it is withdrawn from the corporation in the hands of the shareholder. That being said, the greater the funds are left in the corporation, the greater the deferral advantage will be.