50. Every employee who is employed in pensionable employment for an employer shall, by deduction at source, make a base contribution equal to the product of one-half of the base contribution rate, established under section 44.1, for the year and the lesser of the following amounts:(a) the employee’s salary and wages for the year, described in the fourth paragraph, that the employee’s employer pays to or in respect of the employee, or is deemed to pay to the employee, minus the prescribed amount of the employee’s personal exemption; and
(b) the employee’s maximum contributory earnings for the year, minus the amount obtained by dividing the aggregate of all base contributions that the employee was required to make in the year under a similar plan in respect of the employee’s salary and wages by the base contribution rate for employees for the year under that plan.
For the year 2019 and each subsequent year, the employee shall, by deduction at source and in addition to the base contribution provided for in the first paragraph, make a first additional contribution equal to the product of one-half of the first additional contribution rate for the year, established under section 44.2, and the lesser of the following amounts:(a) the amount determined in respect of the employee for the year under subparagraph a of the first paragraph; and
(b) the employee’s maximum contributory earnings for the year, less the amount obtained by dividing the aggregate of all first additional contributions the employee was required to make in the year under a similar plan in respect of the employee’s salary and wages by the first additional contribution rate for employees for the year under that plan.
For the year 2024 and each subsequent year, the employee shall, by deduction at source and in addition to the contributions provided for in the first and second paragraphs, make a second additional contribution equal to the product of one-half of the second additional contribution rate, established under section 44.3, for the year and the lesser of the following amounts:(a) the amount by which the employee’s salary and wages for the year, referred to in subparagraph a of the first paragraph, paid by the employer to or in respect of the employee or deemed to be paid by the employer to the employee exceeds the employee’s maximum pensionable earnings for the year; and
(b) the employee’s additional maximum contributory earnings for the year, less the amount obtained by dividing the aggregate of all second additional contributions the employee was required to make in the year under a similar plan in respect of the employee’s salary and wages by the second additional contribution rate for employees for the year under that plan.
The amount of the salary and wages for a year to which subparagraph a of the first paragraph refers is the total of(a) the base wages, within the meaning of section 1159.1 of the Taxation Act (chapter I‐3), the employee receives for the year from pensionable employment, minus the amount deducted in computing the employee’s income for the year under section 76 of that Act; and (b) the income the employee is deemed to receive for the year from pensionable employment under paragraph a of section 37.2.
However, such salary and wages do not include any amount paid to the employee, paid in respect of the employee or deemed to be paid to the employee before the employee reaches 18 years of age or in a month that, because of a disability, is excluded from the employee’s base contributory period under subparagraph a of the third paragraph of section 101.
1965 (1st sess.), c. 24, s. 47; 1974, c. 16, s. 8; 1983, c. 43, s. 14; 1985, c. 25, s. 181; 1986, c. 59, s. 2; 1993, c. 64, s. 226; 1995, c. 1, s. 223; 1997, c. 85, s. 390; 2005, c. 1, s. 334; 2005, c. 38, s. 359; 2015, c. 21, s. 605; 2018, c. 22018, c. 2, s. 1312.