PS BUSINESS PARKS, INC. Exhibit 12: Statement re: Computation of Ratio of Earnings to Fixed Charges Nine Months Ended September 30, ---------------------------------------- 1999 1998 ---------------- ---------------- Net income............................................ $ 30,352,000 $ 21,124,000 Minority interest..................................... 10,769,000 8,696,000 Interest expense...................................... 2,658,000 1,736,000 ---------------- ---------------- Total earnings available to cover fixed charges.... $ 43,779,000 $ 31,556,000 ================ ================ Total fixed charges - interest expense (1)............ $ 3,242,000 $ 1,736,000 ================ ================ Total preferred distributions......................... $ 3,370,000 $ - ================ ================ Total combined fixed charges and preferred distributions......................................... $ 6,612,000 $ 1,736,000 ================ ================ Ratio of earnings to fixed charges.................... 13.50 18.18 ================ ================ Ratio of earnings to combined fixed charges and preferred distributions............................... 6.62 18.18 ================ ================ Years Ended December 31, -------------------------------------------------------------------------------- 1998 1997 1996 1995 1994 -------------- -------------- -------------- -------------- -------------- Net income......................... $ 29,400,000 $ 3,836,000 $ 519,000 $ 1,192,000 $ 1,245,000 Minority interest.................. 11,208,000 8,566,000 - - - Interest expense................... 2,361,000 1,000 - - - -------------- -------------- -------------- -------------- -------------- Total earnings available to cover fixed charges......... $ 42,969,000 $ 12,403,000 $ 519,000 $ 1,192,000 $ 1,245,000 ============== ============== ============== ============== ============== Total fixed charges - interest expense (1)..................... $ 2,629,000 $ 1,000 $ - $ - $ - ============== ============== ============== ============== ============== Ratio of earnings to fixed charges. 16.34 12,403 N/A N/A N/A ============== ============== ============== ============== ============== _______________ (1) Fixed charges include interest expense plus capitalized interest. Exhibit 12 PS BUSINESS PARKS, INC. Exhibit 12: Statement re: Computation of Ratio of Earnings to Fixed Charges Supplemental disclosure of Ratio of Funds from Operations ("FFO") to fixed charges: Nine Months Ended September 30, ---------------------------------------- 1999 1998 ---------------- ---------------- FFO................................................... $ 56,848,000 $ 40,317,000 Interest expense...................................... 2,658,000 1,736,000 Minority interest in income - preferred units......... 1,236,000 - Preferred dividends................................... 2,134,000 - ---------------- ---------------- Adjusted FFO available to cover fixed charges...... $ 62,876,000 $ 42,053,000 ================ ================ Total fixed charges - interest expense (1)............ $ 3,242,000 $ 1,736,000 ================ ================ Total preferred distributions......................... $ 3,370,000 $ - ================ ================ Total combined fixed charges and preferred distributions......................................... $ 6,612,000 $ 1,736,000 ================ ================ Ratio of FFO to fixed charges......................... 19.39 24.22 ================ ================ Ratio of FFO to combined fixed charges and preferred distributions......................................... 9.51 24.22 ================ ================ Years Ended December 31, -------------------------------------------------------------------------------- 1998 1997 1996 1995 1994 -------------- -------------- -------------- -------------- -------------- FFO................................ $ 57,430,000 $ 17,597,000 $ 303,000 $ 720,000 $ 757,000 Interest expense................... 2,361,000 1,000 - - - -------------- -------------- -------------- -------------- -------------- Adjusted FFO available to cover fixed charges................... $ 59,791,000 $ 17,598,000 $ 303,000 $ 720,000 $ 757,000 ============== ============== ============== ============== ============== Total fixed charges - interest expense (1)..................... $ 2,629,000 $ 1,000 $ - $ - $ - ============== ============== ============== ============== ============== Ratio of FFO to fixed charges...... 22.74 17,598 N/A N/A N/A ============== ============== ============== ============== ============== (1) Fixed charges include interest expense plus capitalized interest. Exhibit 12