Acquisition of control of a Canadian corporation through the purchase of its shares can have significant effects on the corporation’s tax position. For example, operating losses arising from the business carried on before the acquisition of control may be applied only against future income from that business and similar businesses. Unused capital losses cannot be carried forward for application after the change of control. The acquired company will be deemed to have a tax year-end immediately before the change of control, for which it must file a return and pay any taxes owing.