How much do secret service agents make in a year?

Almost every agent will begin as a GS-5/7 status upon entering the service, with an additional 25% of their base salary for Law Enforcement Availability Pay (LEAP) which is automatically assessed and remains for the duration of the agents career.  There is also a little bit added for cost of living based on the location where the agent is assigned. 

The agent will receive a GS increase for every year (5, then 7, then 9, 11, 12 and finally 13).  Once the agent reaches a GS-13 status, he/she will go up in "step" increases (GS-13 Step 1, Step 2, Step 3....) and can stay that way until retirement or they apply to be a supervisor, which is a GS-14.  Agents can NOT apply for supervisor positions until they have completed their permanent protection assignment, where they are assigned a protective detail in lieu of a field office.  The average wait to leave a field office to go to a "detail" is approximately 7-9 years.  The detail itself is 4-5 years.  So, if you are fortunate, you can apply and be selected for supervisor in approximately 11 years, although it is more realistic to bet that you will be on the job for 15 years before making that spot.  Even then, you are the lowest of the low in supervisory status. 

I obviously didn't answer the question with a number, because there is so many different ways to add up the numbers.  If you do a search for "GS Pay Scale" you will be able to plug this information into the graph and it will help to target the specific pay for the time of an agent's career that you are looking for.