EX-12.1 2 a2207295zex-12_1.htm EX-12.1
QuickLinks -- Click here to rapidly navigate through this document


Exhibit 12.1


Aon Corporation and Consolidated Subsidiaries
Combined With Unconsolidated Subsidiaries
Computation of Ratio of Earnings to Fixed Charges

 
  Years Ended December 31,  
(millions except ratio)
  2011   2010   2009   2008   2007  

Income from continuing operations before income taxes and noncontrolling interests

  $ 1,384   $ 1,059   $ 949   $ 879   $ 1,023  

Less: Equity in earnings on less than 50% owned entities

   
7
   
10
   
11
   
5
   
6
 

Add back fixed charges:

                               

Interest on indebtedness

   
245
   
182
   
122
   
126
   
138
 

Interest on uncertain tax positions

   
   
(1

)
 
2
   
   
2
 

Portion of rents representative of interest factor

   
55
   
48
   
48
   
47
   
75
 
                       

Income as adjusted

 
$

1,677
 
$

1,278
 
$

1,110
 
$

1,047
 
$

1,232
 
                       

Fixed charges:

                               

Interest on indebtedness

 
$

245
 
$

182
 
$

122
 
$

126
 
$

138
 

Interest on uncertain tax positions

   
   
(1

)
 
2
   
   
2
 

Portion of rents representative of interest factor

   
55
   
48
   
48
   
47
   
75
 
                       

Total fixed charges

 
$

300
 
$

229
 
$

172
 
$

173
 
$

215
 
                       

Ratio of earnings to fixed charges

   
5.6
   
5.6
   
6.5
   
6.1
   
5.7
 
                       



QuickLinks

Aon Corporation and Consolidated Subsidiaries Combined With Unconsolidated Subsidiaries Computation of Ratio of Earnings to Fixed Charges