Exhibit 12.1

Enterprise Financial Services Corp
Statement Regarding Computation of Ratios of Earnings to Fixed Charges and Preferred Stock Dividend Requirement (unaudited)

Three months ended Years ended December 31,
($ in thousands)       March 31, 2009 (3)       2008       2007       2006       2005       2004
Earnings (1):
Income (loss) before income taxes $             (52,860 ) $      6,016 $      26,594 $      24,672 $      17,720   $      12,303  
Add: Fixed charges from below   11,101     51,366       61,466   43,141   23,541   12,169
Other adjustments (2) -   - - (875 )   (113 )   -
Earnings including interest expense on deposits (a)   $ (41,759 ) $ 57,382 $ 88,060   $ 66,939 $ 41,149 $ 24,472
 
Less: interest expense on deposits (7,836 ) (39,921 ) (52,864 ) (37,832 ) (20,475 ) (9,998 )
Earnings excluding interest expense on deposits (b) $ (49,595 ) $ 17,462 $ 35,195 $ 29,107 $ 20,674 $ 14,474
 
Fixed charges (1):
       Interest on deposits $ 7,836 $ 39,921 $ 52,864 $ 37,832 $ 20,475 $ 9,998
       Interest on borrowings 2,640 11,338 8,601 5,309 3,067 2,170
       TARP preferred stock dividends (pre-tax) 625 108 - - - -
Fixed charges including interest on deposits (c) $ 11,101 $ 51,366 $ 61,466 $ 43,141 $ 23,541 $ 12,169
 
Less: interest expense on deposits (7,836 ) (39,921 ) (52,864 ) (37,832 ) (20,475 ) (9,998 )
Fixed charges excluding interest expense on deposits (d) $ 3,265 $ 11,446 $ 8,601 $ 5,309 $ 3,067 $ 2,170
 
Ratio of earnings to combined fixed charges and
preferred dividends:
       Excluding interest on deposits (b)/(d) - 1.53x 4.09x 5.48x 6.74x 6.67x
       Including interest on deposits (a)/(c) - 1.12x 1.43x 1.55x 1.75x 2.01x
 
Ratio of earnings to combined fixed charges
       Excluding interest on deposits (b)/(d) - 1.53x 4.09x 5.48x 6.74x 6.67x
       Including interest on deposits (a)/(c) - 1.12x 1.43x 1.55x 1.75x 2.01x

(1)       

As defined in Item 503(d) of Regulation S-K.

 
(2)  

For purposes of the "earnings" computation, other adjustments include subtracting minority interest in pre-tax income of subsidiaries that did not incur fixed charges.

 
(3)  

Due to the Company's $50.6 million loss (including $45.4 million of goodwill impairment charges) for the three months ended March 31, 2009, the ratio coverage was less than 1:1. The Company would have had to generate additional earnings of $52.9 million to achieve a coverage ratio of 1:1.