Who is responsible for computing an officer's time in service for pay purposes?

The correct answer is the Bureau of Naval Personnel, commonly referred to as BUPERS. BUPERS plays a central role in managing personnel records and is responsible for maintaining and updating the time in service calculations for officers. This is crucial as the time in service impacts an officer's pay grade, special pay, and overall compensation within the Navy.

BUPERS utilizes various factors, including active duty time, time in grade, and other service-related components, to compute an accurate time in service for pay purposes. This information is essential not only for ensuring that officers are compensated correctly but also for promoting fairness and adherence to Navy policies regarding service time.

In contrast, although other entities like the Personnel Support Detachment, Navy Finance Center, and the Defense Finance and Accounting Service may play roles in personnel management and finance, they do not compute the time in service specifically for pay. These organizations might handle different aspects of personnel records, payroll processing, or fiscal management, but the accountability for calculating time in service as it directly relates to pay falls under BUPERS.