Is semi-monthly the same as biweekly?
No. Semi-monthly pays twice a month on fixed dates (like the 15th and last day), for 24 paychecks a year with slightly uneven periods. Biweekly pays every two weeks regardless of the calendar, for 26 paychecks a year — occasionally 27 — with every period exactly 14 days.
What happens to my first paycheck at a new job?
Your first check is usually prorated to only the days actually worked in that first pay period, so it is typically smaller than a full paycheck — and depending on your employer's payroll cutoff dates, it may arrive a full pay cycle after your start date rather than on the very next scheduled payday.
How is a prorated paycheck calculated?
A prorated paycheck typically divides the period's normal gross pay by the number of working days in that period, then multiplies by the number of days actually worked — the same principle applies whether the change is a start date, an end date, or a mid-period salary change.