PS BUSINESS PARKS, INC. EXHIBIT 12: STATEMENT RE: COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES Six Months Ended June 30, ------------------------------------------- 2002 2001 ---------------------- -------------------- Net income...................................................... $ 30,174,000 $ 24,295,000 Minority interest............................................... 16,488,000 13,152,000 Interest expense................................................ 2,983,000 394,000 Equity income from sale of joint venture properties............. (148,000) - ---------------------- -------------------- Earnings available to cover fixed charges....................... $ 49,497,000 $ 37,841,000 ====================== ==================== Fixed charges (1)............................................... $ 3,271,000 $ 1,292,000 Preferred distributions......................................... 16,375,000 9,548,000 ---------------------- -------------------- Combined fixed charges and preferred distributions.............. $ 19,646,000 $ 10,840,000 ====================== ==================== Ratio of earnings to fixed charges.............................. 15.13 29.29 ====================== ==================== Ratio of earnings to combined fixed charges and preferred distributions.................................................. 2.52 3.49 ====================== ==================== Years Ended December 31, --------------------------------------------------------------------------------- 2001 2000 1999 1998 1997 ---------------- --------------- --------------- --------------- --------------- Net income......................... $ 49,870,000 $ 51,181,000 $ 41,255,000 $ 29,400,000 $ 3,836,000 Minority interest.................. 27,489,000 26,741,000 16,049,000 11,208,000 8,566,000 Interest expense................... 1,715,000 1,481,000 3,153,000 2,361,000 1,000 ---------------- --------------- --------------- --------------- --------------- Earnings available to cover fixed charges......................... $79,074,000 $79,403,000 $ 60,457,000 $ 42,969,000 $ 12,403,000 ================ =============== ================ =============== =============== Fixed charges (1).................. $ 2,806,000 $ 2,896,000 $ 4,142,000 $ 2,629,000 $ 1,000 Preferred distributions............ 22,961,000 17,273,000 7,562,000 - - ---------------- --------------- --------------- --------------- --------------- Combined fixed charges and preferred distributions.......... $ 25,767,000 $ 20,169,000 $ 11,704,000 $ 2,629,000 $ 1,000 ================ =============== ================ =============== =============== Ratio of earnings to fixed charges. 28.18 27.42 14.60 16.34 12,403 ================ =============== ================ =============== =============== Ratio of earnings to combined fixed charges and preferred distributions................... 3.07 3.94 5.17 16.34 12,403 ================ =============== ================ =============== =============== (1) Fixed charges include interest expense plus capitalized interest.