1. What is OPM Length of Service Calculation?

The Length of Service calculation determines the total years of creditable service used to compute federal employee pensions under the Office of Personnel Management (OPM) rules.

2. How Does the Calculator Work?

The calculator uses the basic formula:

Where:

• Years of Creditable Service — Total years of federal service that count toward pension

Explanation: This simple calculation forms the basis for more complex pension computations that may include multipliers for different service types.

3. Importance of Length of Service

Details: Length of service is a key factor in determining federal pension benefits, along with high-3 average salary and the appropriate pension formula multiplier.

4. Using the Calculator

Tips: Enter your total years of creditable federal service. Partial years should be entered as decimals (e.g., 3 months = 0.25 years).

5. Frequently Asked Questions (FAQ)

Q1: What counts as creditable service?
A: Most federal employment, including full-time, part-time, and certain types of military service when properly credited.

Q2: How is service calculated for part-time work?
A: Part-time service is prorated based on a standard 40-hour work week.

Q3: Can unused sick leave be counted?
A: Yes, unused sick leave is converted to additional service time at retirement.

Q4: How does this affect my pension amount?
A: Pension is typically calculated as: (High-3 Salary) × (Years of Service) × (Multiplier, usually 1% or 1.1%).

Q5: Where can I verify my service time?
A: Check your Official Personnel Folder (OPF) or request a retirement estimate from your HR office.