How do you calculate Longevity Pay?

To calculate longevity pay, you typically determine the percentage increase you are eligible for based on your years of service with a particular employer. Commonly, longevity pay is calculated as a set percentage of your base salary for each year of service beyond a certain threshold, such as 5 or 10 years. Multiply your base salary by the applicable percentage for your years of service to calculate your longevity pay amount.