Equity Commonwealth (EQC) 10-Q 2011 Q2 Quarterly report

Exhibit 12.1

COMMONWEALTH REIT

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

(dollars in thousands)

	Six Months Ended June 30,						Year Ended December 31,
	2011			2010			2010			2009			2008		2007			2006
Earnings:
Income from continuing operations	$	33,320		$	28,433		$	79,751		$	78,931		$	61,731	$	68,141		$	199,475
Equity in earnings and gains on equity transactions of investees	(5,622		)	(21,062		)	(43,272		)	(6,546		)	—		—			(119,423		)
Fixed charges	95,614			92,763			183,433			173,458			180,193		171,459			165,903
Distributions from investees	8,259			7,960			16,119			4,975			—		—			5,387
Capitalized interest	—			—			—			—			—		(489		)	(335		)
Adjusted Earnings	$	131,571		$	108,094		$	236,031		$	250,818		$	241,924	$	239,111		$	251,007
Fixed Charges:
Interest expense (including net amortization of debt discounts, premiums and deferred financing fees)	$	95,614		$	92,763		$	183,433		$	173,458		$	180,193	$	170,970		$	165,568
Capitalized interest	—			—			—			—			—		489			335
Total Fixed Charges	$	95,614		$	92,763		$	183,433		$	173,458		$	180,193	$	171,459		$	165,903
Ratio of Earnings to Fixed Charges	1.4x			1.2x			1.3x			1.4x			1.3x		1.4x			1.5x