PS BUSINESS PARKS, INC. EXHIBIT 12 STATEMENT RE: COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES Three Months Ended March 31, ---------------------------------------- 2002 2001 ---------------- ---------------- Net income...................................................... $ 16,702,000 $ 11,465,000 Minority interest............................................... 8,844,000 6,423,000 Interest expense................................................ 1,551,000 237,000 ---------------- ---------------- Earnings available to cover fixed charges....................... $ 27,097,000 $ 18,125,000 ================ ================ Fixed charges (1)............................................... $ 1,695,000 $ 649,000 Preferred distributions......................................... 8,029,000 4,459,000 ---------------- ---------------- Combined fixed charges and preferred distributions.............. $ 9,724,000 $ 5,108,000 ================ ================ Ratio of earnings to fixed charges.............................. 15.99 27.93 ================ ================ Ratio of earnings to combined fixed charges and preferred distributions.................................................. 2.79 3.55 ================ ================ 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. 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: Three Months Ended March 31, ---------------------------------------- 2002 2001 ---------------- ---------------- FFO............................................................. $ 25,164,000 $ 22,690,000 Interest expense................................................ 1,551,000 237,000 Minority interest in income - preferred units................... 4,412,000 3,187,000 Preferred dividends............................................. 3,617,000 1,272,000 ---------------- ---------------- Adjusted FFO available to cover fixed charges................... $ 34,744,000 $ 27,386,000 ================ ================ Fixed charges (1)............................................... $ 1,695,000 $ 649,000 Preferred distributions......................................... 8,029,000 4,459,000 ---------------- ---------------- Combined fixed charges and preferred distributions.............. $ 9,724,000 $ 5,108,000 ================ ================ Ratio of FFO to fixed charges................................... 20.50 42.20 ================ ================ Ratio of FFO to combined fixed charges and preferred distributions.................................................. 3.57 5.36 ================ ================ Years Ended December 31, ------------------------------------------------------------------------------- 2001 2000 1999 1998 1997 ------------- ------------- ------------- ------------- ------------- FFO................................ $ 93,568,000 $ 85,977,000 $ 76,353,000 $ 57,430,000 $ 17,597,000 Interest expense................... 1,715,000 1,481,000 3,153,000 2,361,000 1,000 Minority interest in income - preferred units................. 14,107,000 12,185,000 4,156,000 - - Preferred dividends................ 8,854,000 5,088,000 3,406,000 - - ------------- ------------- ------------- ------------- ------------- Adjusted FFO available to cover fixed charges................... $ 118,244,000 $ 104,731,000 $ 87,068,000 $ 59,791,000 $ 17,598,000 ============= ============= ============= ============= ============= 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 FFO to fixed charges...... 42.14 36.16 21.02 22.74 17,598 ============= ============= ============= ============= ============= Ratio of FFO to combined fixed charges and preferred distributions................... 4.59 5.19 7.44 22.74 17,598 ============= ============= ============= ============= ============= (1) Fixed charges include interest expense plus capitalized interest.