Why 26, not 24
Biweekly is every two weeks (26 periods). Semimonthly is twice a month (24). A $2,000 biweekly cheque is not the same annual pay as $2,000 semimonthly.
Biweekly pay is 26 cheques a year. This calculator estimates the annual deductions first, then divides net pay by 26 so the biweekly amount stays consistent with the yearly total.
Biweekly is every two weeks (26 periods). Semimonthly is twice a month (24). A $2,000 biweekly cheque is not the same annual pay as $2,000 semimonthly.
Income tax, CPP, and EI are estimated on an annual basis using CRA Option 1, then divided by 26. Real employers may true-up CPP or EI mid-year when a ceiling is reached, so an individual cheque can differ even when the yearly total is close.
26. Some years a weekday calendar produces 27 pay dates; this estimate always uses 26 so annual and biweekly figures stay internally consistent.