1. The amount employers must withhold each year under the first paragraph of section 29 is equal to the amount “A” obtained using the following formula:
RC × [PS - ((E × MPE) × S)] - R = A
where
“RC” is the rate of contribution for the year established under section 177;
“PS” is the pensionable salary;
“E” is the percentage of exemption which is 33% for 2012, 31% for 2013, 29% for 2014, 27% for 2015 and 25% as of 2016;
“MPE” is the maximum pensionable earnings within the meaning of the Act respecting the Québec Pension Plan (chapter R-9) for the year; “S” is the credited or harmonized service referred to in the second paragraph of section 29;
“R” is the reduction that corresponds to the higher of 0 and the result obtained using the following formula:
F × ((MPE × S) - PS) = R
where
“F” is the factor for the year established under section 177.