Exhibit 12 THE LACLEDE GROUP, INC. AND SUBSIDIARY COMPANIES SCHEDULE OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES ------------------------------------------------------------- Twelve Months Ended ------------------------------------------------------------------------------ June 30, September 30, ----------- -------------------------------------------------------------- (Thousands of Dollars) 2004 2003 2002 2001 2000 1999 ---- ---- ---- ---- ---- ---- Income before interest charges and income taxes $85,281 $80,185 $60,440 $73,742 $64,078 $61,016 Add: One third of applicable rentals charged to operating expense (which approximates the interest factor) 2,128 2,873 2,662 313 310 301 -------------------------------------------------------------------------------- Total Earnings $87,409 $83,058 $63,102 $74,055 $64,388 $61,317 ================================================================================ Interest on long-term debt - Laclede Gas $20,651 $20,169 $20,820 $18,372 $15,164 $13,966 Other interest 7,002 6,717 4,989 10,067 8,844 6,627 Add: One third of applicable rentals charged to operating expense (which approximates the interest factor) 2,254 2,873 2,662 313 310 301 -------------------------------------------------------------------------------- Total Fixed Charges $29,907 $29,759 $28,471 $28,752 $24,318 $20,894 ================================================================================ Ratio of Earnings to Fixed Charges 2.92 2.79 2.22 2.58 2.65 2.93 LACLEDE GAS COMPANY SCHEDULE OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES ------------------------------------------------------------- Twelve Months Ended ------------------------------------------------------------------------------ June 30, September 30, ----------- -------------------------------------------------------------- (Thousands of Dollars) 2004 2003 2002 2001 2000 1999 ---- ---- ---- ---- ---- ---- Income before interest charges and income taxes $77,458 $76,274 $56,154 $73,742 $64,078 $61,016 Add: One third of applicable rentals charged to operating expense (which approximates the interest factor) 404 457 315 313 310 301 -------------------------------------------------------------------------------- Total Earnings $77,862 $76,731 $56,469 $74,055 $64,388 $61,317 ================================================================================ Interest on long-term debt $20,651 $20,169 $20,820 $18,372 $15,164 $13,966 Other interest 3,505 3,752 4,285 10,067 8,844 6,627 Add: One third of applicable rentals charged to operating expense (which approximates the interest factor) 529 457 315 313 310 301 -------------------------------------------------------------------------------- Total Fixed Charges $24,685 $24,378 $25,420 $28,752 $24,318 $20,894 ================================================================================ Ratio of Earnings to Fixed Charges 3.15 3.15 2.22 2.58 2.65 2.93