EXHIBIT 11 Flagstar Bancorp, Inc. Computation of Net Earnings per Share Net earnings per share - basic and net earnings per share - diluted are computed by dividing this amount by the weighted average number of common stock and common stock equivalents outstanding during the period, respectively (in thousands, except per share data). FOR THE THREE MONTHS ENDED MARCH 31, 2006 2005 ----------- ------------ Net Earnings $ 18,910 $ 19,778 Average common shares outstanding 63,367 61,459 Net earnings per share - basic $ 0.30 $ 0.32 Average common share equivalents outstanding 64,181 63,899 Net earnings per share - diluted $ 0.29 $ 0.31