GMAC Capital Trust I POSASR Automatic shelf registration (post-effective amendment)

Exhibit 12.1

Ally Financial Inc.

Ratio of Earnings to Fixed Charges

Year ended December 31, ($ in millions)	2010 (a)			2009 (a)			2008 (a)			2007 (a)			2006 (a)
Earnings
Consolidated net income (loss) from continuing operations	$	1,026		$	(7,033	)	$	4,873		$	(1,918	)	$	1,840
Income tax expense (benefit) from continuing operations		153			74			(136	)		496			22
Equity-method investee distribution		—			—			111			65			651
Equity-method investee (losses) earnings		(57	)		(10	)		533			5			(512	)
Minority interest expense		1			1			1			2			9
Consolidated income (loss) from continuing operations before income taxes, minority interest, and income or loss from equity investees		1,123			(6,968	)		5,382			(1,350	)		2,010
Fixed charges		6,915			7,202			10,218			13,725			14,705
Earnings available for fixed charges	$	8,038		$	234		$	15,600		$	12,375		$	16,715
Fixed charges
Interest, discount, and issuance expense on debt		6,883			7,166			10,166			13,665			14,639
Portion of rentals representative of the interest factor		32			36			52			60			66
Total fixed charges		6,915			7,202			10,218			13,725			14,705
Preferred dividend requirements		2,138			1,224			—			192			22
Total fixed charges and preferred dividend requirements	$	9,053		$	8,426		$	10,218		$	13,917		$	14,727
Ratio of earning to fixed charges (b)		1.16			0.03			1.53			0.90			1.14
Ratio of earnings to fixed charges and preferred dividend requirements (c)		0.89			0.03			1.53			0.89			1.13

(a) During 2009, we committed to sell certain operations of our International Automotive Finance operations, Insurance operations, Mortgage operations, and Commercial Finance Group. We report these businesses separately as discontinued operations in the Consolidated Financial Statements. See Note 2 to the Consolidated Financial Statements for further discussion of our discontinued operations. All reported periods of the calculation of the ratio of earnings to fixed charges exclude discontinued operations.

(b) The ratio calculation indicates a less than one-to-one coverage for the years ended December 31, 2009 and 2007. Earnings available for fixed charges for the years ended December 31, 2009 and 2007, were inadequate to cover total fixed charges. The deficient amount for the ratio was $6,968 million for 2009 and $1,350 million for 2007.

(c) The ratio calculation indicates a less than one-to-one coverage for the years ended December 31, 2010, 2009 and 2007. Earnings available for fixed charges for the years ended December 31, 2010, 2009 and 2007, were inadequate to cover total fixed charges. The deficient amount for the ratio was $1,015 million for 2010, $8,192 million for 2009, and $1,542 million for 2007.