When an individual sells some property, investments or other assets (perhaps you have a Picasso lying around that's appreciated in value), only 50% of the gain is subject to tax. For example if you sell a rental property and realize a gain, after brokerage and expenses, of $100,000, only $50,000 will be taxable. (The actual tax that you pay will depend on your marginal tax rate at the time). The other 50% of the capital gain is a non taxable gain. For a corporation, however, this distinction is a little more complex. In order to allow corporations the same benefit as individuals with respect to capital gains and losses, the 50% non taxable portion of the gain on a corporate capital transaction is allocated to what is referred to as a Capital Dividend Account or CDA. The balance in the CDA, which is a cumulative balance over the lifetime of a corporation, is then available to the shareholders on a tax free basis.