Prorated Salary
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Prorating means calculating the portion of an annual salary that corresponds to less than a full year of work, such as when someone starts or leaves a job partway through the year, or works a partial pay period.

It's typically calculated by dividing the annual salary by the total number of days (or working days) in the year, then multiplying by the number of days actually worked, giving a proportional share of the full annual amount.

Both methods are used in practice and can give slightly different results — calendar days is simpler and more common for straightforward mid-year start or end dates, while working days (excluding weekends and holidays) can be more precise for certain payroll systems. Check which method your employer's payroll policy uses.

Salary proration itself only addresses cash pay; benefits like health insurance, retirement matching, or paid time off often have separate eligibility rules and accrual schedules that may or may not be prorated the same way — check with your HR department for specifics.

Common situations include switching from part-time to full-time (or vice versa) mid-year, taking a period of unpaid leave, or receiving a mid-year raise that only applies from a certain date forward — each requires prorating the relevant portion of the year at the applicable rate.