Lost Service Time (LST)


Lost Service Time (LST), also known as “Bad Time”, is the number of calendar hours that, for any number of reasons, does not count toward your pension service time and will be subtracted from your years of service percentage calculation. Generally, it results from unpaid absences during which you did not make pension contributions.

How We Calculate Your Bad Time/LST Hours

The personalized listing of your Bad Time/LST reflects calendar hours. There is an important difference between calendar hours and work hours. Please review the following information carefully so that you understand how and why we reflect your Bad Time/LST in calendar hours.

For every pay period worked (see below for Fire Department platoon duty exception), you receive 14 calendar days of service credit. So, to convert work days to calendar days, we multiply work days by 1.4.

  • Example: 10 work days x 1.4 = 14 calendar days.

If you are suspended for 10 work days, our records reflect that you have 14 calendar days of Bad Time/LST

  • Example: 10 x 1.4 = 14 calendar days of Bad Time/LST

We “store” Bad Time/LST in calendar hours. We take Bad Time/LST work hours and multiply by 1.4 to arrive at the number of calendar hours.

  • Example: If you were suspended for five days, you would have 40 work hours of suspension. We multiply that number by 1.4 to arrive at 56 calendar hours of suspension.

Storing Bad Time/LST in calendar hours simplifies the years of service calculation, as we divide the number of calendar hours by 8 to arrive at the number of calendar days of Bad Time/LST you have. We then deduct the calendar days of Bad Time/LST from your years of service to arrive at your correct years of service. In cases where our records differ, we use the records of the employing department.

  • Example: If you have exactly 26 years of service but during this time you had 64 work hours of unpaid leave. Here is how we deduct your Bad Time/LST from your years of service:
    • To convert from work hours to calendar hours: 64 work hours multiplied by 1.4 = 89.6 calendar hours
    • To convert calendar hours to number of days: 89.6 calendar hours divided by 8 = 11.2 calendar days
    • To deduct from your total years of service: 26 years minus 11.2 calendar days = 25 years and 353.8 calendar
    • To convert in years, divide the partial year by 365 days: 353.8 calendar days divided by 365 calendar days = 0.969315
    • Your total years of service is 25.969315.

Calculating Bad Time/LST for Time on Platoon Duty

If your Bad Time/LST hours occurred while you were working platoon duty in the Fire Department, your work hours are equal to calendar hours. Similarly, your work days equal calendar days. Because of this, we can divide your platoon duty hours by 8 to arrive at the number of calendar days of service.

  • Example: In a two-week period you work 112 hours on platoon duty. If you divide 112 by 8, you get 14. This equals the number of calendar days of service in a two-week period.

Purchasing LST

Lost Service Time may not be purchased except for time when you received temporary disability under state Workers’ Compensation laws (State Rate).

Purchases may be made either by one lump sum payment, through payroll deduction, transfer from your Deferred Compensation account, rollover from another qualified retirement plan or any combination thereof. If you choose to pay through payroll deduction, regardless of when the purchase occurs, a service charge is applied to the entire contribution and interest amount.

If you are interested in purchasing your Workers’ Compensation, please submit the Request for Service Credit Purchase Estimate

All service credit purchases must be completed prior to retirement or entry into the Deferred Retirement Option Plan (DROP) Program.


If you have any questions, please contact the Active Member Services Section at (213) 279-3140 or toll-free at (844) 88-LAFPP.