Exhibit 12.1

Aon plc and Consolidated Subsidiaries

Combined With Unconsolidated Subsidiaries

Computation of Ratio of Earnings to Fixed Charges

	Years Ended December 31,
(millions except ratio)	2013		2012		2011		2010			2009
Income from continuing operations before income taxes and noncontrolling interests (1)	$	1,538	$	1,380	$	1,388	$	1,059		$	949
Less: Equity in earnings on less than 50% owned entities	20		13		7		10			11
Add back fixed charges:
Interest on indebtedness	210		228		245		182			122
Interest on uncertain tax positions	5		5		—		(1		)	2
Portion of rents representative of interest factor	52		42		55		48			48
Income as adjusted	$	1,785	$	1,642	$	1,681	$	1,278		$	1,110
Fixed charges:
Interest on indebtedness	$	210	$	228	$	245	$	182		$	122
Interest on uncertain tax positions	5		5		—		(1		)	2
Portion of rents representative of interest factor	52		42		55		48			48
Total fixed charges	$	267	$	275	$	300	$	229		$	172
Ratio of earnings to fixed charges	6.7		6.0		5.6		5.6			6.5

(1) For the years ended December 31, 2012, and 2011 amounts related to discontinued operations have been included in Other income to conform to amounts included in the Consolidated Financial Statements. These amounts in the years ended December 31, 2012 and 2011, which were historically included in Income (loss) from discontinued operations, have been reclassified to conform with current presentation. The amounts reclassified were $1 million loss and $4 million income for the years ended December 31, 2012 and 2011, respectively, from Income (loss) from discontinued operations to Other income. For the years ended December 31, 2010 and 2009, amounts related to discontinued operations remain in Income (loss) from discontinued operations as they are more meaningful to the presentation of continuing operations in those years.