What "flow-through" means
A MIC deducts the taxable dividends it pays during the year, or within 90 days after year end, from its own income. Distribute essentially all taxable income and the corporation pays little or no tax on it — the tax is borne by the shareholder instead.
Those dividends are then deemed, under subsection 130.1(2), to be received by you as interest on a bond. Practical effect: fully taxable at your marginal rate, no dividend tax credit, reported on a T5 as interest. Capital gains dividends can be designated separately where the corporation realises capital gains.