1 EXHIBIT 11.1 STATEMENT RE: COMPUTATION OF EARNINGS PER SHARE USA TRUCK, INC. - -------------------------------------------------------------------------------- Three Months Ended Six Months Ended June 30, June 30, --------------------------- --------------------------- 1999 1998 1999 1998 ------------ ------------ ------------ ------------ Numerator: Net income and comprehensive income $ 2,434,803 $ 2,798,077 $ 4,758,920 $ 5,135,794 ============ ============ ============ ============ Denominator: Denominator for basic earnings per share - weighted average shares 9,373,109 9,418,826 9,384,410 9,378,054 Effect of dilutive securities:- Employee stock options 37,366 112,228 38,881 100,108 ------------ ------------ ------------ ------------ Denominator for diluted earnings per share - adjusted weighted average shares and assumed conversions 9,410,475 9,531,054 9,423,291 9,478,162 ============ ============ ============ ============ Basic earnings per share $ 0.26 $ 0.30 $ 0.51 $ 0.55 ============ ============ ============ ============ Diluted earnings per share $ 0.26 $ 0.29 $ 0.51 $ 0.54 ============ ============ ============ ============