Back in the 1950’s the state gave each department some start up money to invest for future retirements. Each department was allowed to invest it as they see fit. For example: each department sets a dollar amount per year of service served in good standing. Our department is on the low side, around $800 for each year. Some area departments are as high as $2,500/yr. To be fully vested requires 20 years in good standing. You can retire at 10 years but only claim 50%, and each year prorated after that.. Depending on SOG’s, it can take some guys 30 years to get their 20 years of good standing served (if they had some years where their attendance wasn’t up to par, etc).