PS BUSINESS PARKS, INC. Exhibit 12: Statement re: Computation of Ratio of Earnings to Fixed Charges Six Months Ended June 30, -------------------------------------- 1999 1998 ------------- ------------- Net income............................................ $ 19,697,000 $ 11,376,000 Minority interest..................................... 6,400,000 5,683,000 Interest expense...................................... 1,681,000 1,069,000 ------------- ------------- Total earnings available to cover fixed charges.... $ 27,778,000 $ 18,128,000 ============= ============= Total fixed charges - interest expense (1)............ $ 2,091,000 $ 1,069,000 ============= ============= Total preferred distributions......................... $ 1,076,000 $ - ============= ============= Total combined fixed charges and preferred distributions......................................... $ 3,167,000 $ 1,069,000 ============= ============= Ratio of earnings to fixed charges.................... 13.28 16.96 ============= ============= Ratio of earnings to combined fixed charges and preferred distributions............................... 8.77 16.96 ============= ============= 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: Six Months Ended June 30, ------------------------------------- 1999 1998 ------------- ------------- FFO................................................... $ 37,461,000 $ 23,615,000 Interest expense...................................... 1,681,000 1,069,000 Minority interest in income - preferred units......... 214,000 - Preferred dividends................................... 862,000 - ------------- ------------- Adjusted FFO available to cover fixed charges...... $ 40,218,000 $ 24,684,000 ============= ============= Total fixed charges - interest expense (1)............ $ 2,091,000 $ 1,069,000 ============= ============= Total preferred distributions......................... $ 1,076,000 $ - ============= ============= Total combined fixed charges and preferred distributions......................................... $ 3,167,000 $ 1,069,000 ============= ============= Ratio of FFO to fixed charges......................... 19.23 23.09 ============= ============= Ratio of FFO to combined fixed charges and preferred distributions......................................... 12.70 23.09 ============= ============= 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