PS BUSINESS PARKS, INC. EXHIBIT 12: STATEMENT RE: COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES Six Months Ended June 30, ------------------------------------------- 2000 1999 -------------------- ---------------------- Net income...................................................... $ 22,255,000 $ 19,697,000 Minority interest............................................... 12,031,000 6,400,000 Interest expense................................................ 744,000 1,681,000 -------------------- ---------------------- Earnings available to cover fixed charges....................... $ 35,030,000 $ 27,778,000 ==================== ====================== Fixed charges (1)............................................... 1,432,000 2,091,000 Preferred distributions......................................... 8,385,000 1,076,000 -------------------- ---------------------- Combined fixed charges and preferred distributions.............. $ 9,817,000 $ 3,167,000 ==================== ====================== Ratio of earnings to fixed charges.............................. 24.46 13.28 ==================== ====================== Ratio of earnings to combined fixed charges and preferred distributions................................................ 3.57 8.77 ==================== ====================== Years Ended December 31, -------------------------------------------------------------------------------- 1999 1998 1997 1996 1995 --------------- ---------------- --------------- ---------------- -------------- Net income.......................... $ 41,255,000 $ 29,400,000 $ 3,836,000 $ 519,000 $ 1,192,000 Minority interest................... 16,049,000 11,208,000 8,566,000 - - Interest expense.................... 3,153,000 2,361,000 1,000 - - --------------- ---------------- --------------- ---------------- -------------- Earnings available to cover fixed charges.......................... $60,457,000 $ 42,969,000 $ 12,403,000 $ 519,000 $ 1,192,000 =============== ================ =============== ================ ============== Fixed charges (1)................... $ 4,142,000 $ 2,629,000 $ 1,000 $ - $ - Preferred distributions............. 7,562,000 - - - - --------------- ---------------- --------------- ---------------- -------------- Combined fixed charges and preferred distributions.................... $ 11,704,000 $ 2,629,000 $ 1,000 $ - $ - =============== ================ =============== ================ ============== Ratio of earnings to fixed charges.. 14.60 16.34 12,403 N/A N/A =============== ================ =============== ================ ============== Ratio of earnings to combined fixed charges and preferred distributions.................... 5.17 16.34 12,403 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, ------------------------------------------- 2000 1999 ------------------- --------------------- FFO............................................................. $ 41,854,000 $ 37,461,000 Interest expense................................................ 744,000 1,681,000 Minority interest in income - preferred units................... 5,841,000 214,000 Preferred dividends............................................. 2,544,000 862,000 ------------------- --------------------- Adjusted FFO available to cover fixed charges................... $ 50,983,000 $ 40,218,000 =================== ===================== Fixed charges (1)............................................... 1,432,000 2,091,000 Preferred distributions......................................... 8,385,000 1,076,000 ------------------- --------------------- Combined fixed charges and preferred distributions.............. $ 9,817,000 $ 3,167,000 =================== ===================== Ratio of FFO to fixed charges................................... 35.60 19.23 =================== ===================== Ratio of FFO to combined fixed charges and preferred distributions................................................ 5.19 12.70 =================== ===================== Years Ended December 31, -------------------------------------------------------------------------------- 1999 1998 1997 1996 1995 --------------- ---------------- --------------- ---------------- -------------- FFO................................. $ 76,353,000 $ 57,430,000 $ 17,597,000 $ 303,000 $ 720,000 Interest expense.................... 3,153,000 2,361,000 1,000 - - Minority interest in income - preferred units.................. 4,156,000 - - - - Preferred dividends................. 3,406,000 - - - - --------------- ---------------- --------------- ---------------- -------------- Adjusted FFO available to cover fixed charges.................... $ 87,068,000 $ 59,791,000 $ 17,598,000 $ 303,000 $ 720,000 =============== ================ =============== ================ ============== Fixed charges (1)................... $ 4,142,000 $ 2,629,000 $ 1,000 $ - $ - Preferred distributions............. 7,562,000 - - - - Combined fixed charges and preferred distributions.................... $ 11,704,000 $ 2,629,000 $ 1,000 $ - $ - =============== ================ =============== ================ ============== Ratio of FFO to fixed charges....... 21.02 22.74 17,598 N/A N/A =============== ================ =============== ================ ============== Ratio of FFO to combined fixed charges and preferred distributions.................... 7.44 22.74 17,598 N/A N/A =============== ================ =============== ================ ============== (1) Fixed charges include interest expense plus capitalized interest. Exhibit 12