| Exhibit 12.1 |
| MISSISSIPPI POWER COMPANY |
| Computation of ratio of earnings to fixed charges for |
| the five years ended December 31, 2011 |
| and the year to date June 30, 2012 |
| Six | |||||||||||||||||
| Months | |||||||||||||||||
| Ended | |||||||||||||||||
| Year ended December 31, | June 30, | ||||||||||||||||
| 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | ||||||||||||
| EARNINGS AS DEFINED IN ITEM 503 OF REGULATION S-K: | |||||||||||||||||
| Earnings before income taxes | $ | 137,594,001 | $ | 136,041,069 | $ | 136,913,336 | $ | 128,224,330 | $ | 138,107,611 | $ | 81,786,755 | |||||
| Interest expense, net of amounts capitalized | 18,157,804 | 17,978,728 | 22,940,331 | 22,340,879 | 21,691,360 | 20,828,330 | |||||||||||
| Interest component of rental expense | 30,386,000 | 31,139,000 | 30,279,000 | 30,089,000 | 24,388,799 | 1,914,779 | |||||||||||
| AFUDC - Debt funds | 11,852 | 228,997 | 117,290 | 2,903,203 | 8,182,311 | 12,653,264 | |||||||||||
| Earnings as defined | $ | 186,149,657 | $ | 185,387,794 | $ | 190,249,957 | $ | 183,557,412 | $ | 192,370,081 | $ | 117,183,128 | |||||
| FIXED CHARGES AS DEFINED IN ITEM 503 OF REGULATION S-K: | |||||||||||||||||
| Interest on long-term debt | $ | 12,440,269 | $ | 15,466,831 | $ | 20,620,126 | $ | 21,795,022 | $ | 29,171,448 | $ | 26,913,742 | |||||
| Interest on affiliated loans | 4,094,712 | 729,529 | 47,222 | 33,054 | 14,354 | 0 | |||||||||||
| Amort of debt disc, premium and expense, net | 1,055,246 | 1,204,115 | 1,399,277 | 1,624,020 | 406,628 | 704,949 | |||||||||||
| Other interest charges | 579,428 | 807,250 | 990,996 | 1,791,985 | 2,164,264 | 5,686,035 | |||||||||||
| Interest component of rental expense | 30,386,000 | 31,139,000 | 30,279,000 | 30,089,000 | 24,388,799 | 1,914,779 | |||||||||||
| Fixed charges as defined | $ | 48,555,655 | $ | 49,346,725 | $ | 53,336,621 | $ | 55,333,081 | $ | 56,145,493 | $ | 35,219,505 | |||||
| RATIO OF EARNINGS TO FIXED CHARGES | 3.83 | 3.76 | 3.57 | 3.32 | 3.43 | 3.33 | |||||||||||
(a) Includes the interest component of rentals where determinable plus one-third of remaining rental expense.