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)	2015		2014		2013		2012		2011
Income from continuing operations before income taxes and noncontrolling interests	$	1,689	$	1,765	$	1,538	$	1,380	$	1,388
Less: Equity in earnings on less than 50% owned entities	13		12		20		13		7
Add back fixed charges:
Interest on indebtedness	273		255		210		228		245
Interest on uncertain tax positions	—		4		5		5		—
Portion of rents representative of interest factor	45		50		52		42		55
Income as adjusted	$	1,994	$	2,062	$	1,785	$	1,642	$	1,681
Fixed charges:
Interest on indebtedness	$	273	$	255	$	210	$	228	$	245
Interest on uncertain tax positions	—		4		5		5		—
Portion of rents representative of interest factor	45		50		52		42		55
Total fixed charges	$	318	$	309	$	267	$	275	$	300
Ratio of earnings to fixed charges	6.3		6.7		6.7		6.0		5.6