Exhibit 12.1
												11/5/2008
MISSISSIPPI POWER COMPANY
Computation of ratio of earnings to fixed charges for
the five years ended December 31, 2007
and the year to date September 30, 2008
												Nine
												Months
												Ended
	Year ended December 31,											September 30,
		2003		2004		2005		2006		2007		2008
	--------------------------------------------------Thousands of Dollars--------------------------------------------------
EARNINGS AS DEFINED IN ITEM 503 OF REGULATION S-K:
Earnings before income taxes	$	120,827	$	131,299	$	121,915	$	131,840	$	137,594	$	120,525
Interest expense, net of amounts capitalized		14,369		13,724		13,828		18,639		18,158		13,336
Distributions on mandatorily redeemable preferred securities		2,520		630		0		0		0		0
AFUDC - Debt funds		0		0		0		0		12		113
Earnings as defined	$	137,716	$	145,653	$	135,743	$	150,479	$	155,764	$	133,974
FIXED CHARGES AS DEFINED IN ITEM 503 OF REGULATION S-K:
Interest on long-term debt	$	10,116	$	9,067	$	10,490	$	11,808	$	12,441	$	11,384
Interest on affiliated loans		55		2,218		3,284		3,882		4,095		579
Interest on interim obligations		0		0		437		1,425		0		0
Amort of debt disc, premium and expense, net		1,178		1,080		1,111		1,060		1,055		893
Other interest charges		3,020		1,359		(1,494)		464		579		593
Distributions on mandatorily redeemable preferred securities		2,520		630		0		0		0		0
Fixed charges as defined	$	16,889	$	14,354	$	13,828	$	18,639	$	18,170	$	13,449
RATIO OF EARNINGS TO FIXED CHARGES		8.15		10.15		9.82		8.07		8.57		9.96