On January 1, 2012, changes to the rules for deducting CPP contributions will come into effect. These legislative changes do not affect the salary or wages of an employee who is considered to be disabled under the CPP, nor do they affect the salary and wages of a person who has reached 70 years of age. In addition, individuals will not be affected by these changes if they started receiving a CPP retirement pension before December 31, 2010, and they remain out of the workforce. So, what do employers need to know?