Exhibit 12.1

OTTER TAIL CORPORATION
CALCULATION OF RATIOS OF EARNINGS TO FIXED CHARGES AND PREFERRED DIVIDENDS

												Three Months
												Ended
		Year Ended December 31,										March 31,
		2004		2005		2006		2007		2008		2009
Earnings:
Pretax income from continuing operations		$	57,867,958	$	81,912,596	$	77,855,302	$	81,928,914	$	50,161,916	$	3,006,386
Plus fixed charges (see below)			24,187,541		24,615,267		26,458,342		32,389,334		36,082,847		8,272,328
Total earnings	1	$	82,055,499	$	106,527,863	$	104,313,644	$	114,318,248	$	86,244,763	$	11,278,714
Fixed Charges
Interest charges		$	17,421,311	$	17,637,279	$	18,789,945	$	22,384,136	$	28,094,844	$	6,295,598
Amortization of debt expense, premium and discount			982,230		1,010,988		945,397		1,138,198		1,020,003		337,980
Estimated interest component of operating leases			5,784,000		5,967,000		6,723,000		8,867,000		6,968,000		1,638,750
Total fixed charges	2	$	24,187,541	$	24,615,267	$	26,458,342	$	32,389,334	$	36,082,847	$	8,272,328
Preferred Dividend Requirement		$	987,309	$	1,044,009	$	1,043,125	$	1,033,385	$	981,547	$	138,628
Total Fixed Charges and Preferred Dividend Requirement	3	$	25,174,850	$	25,659,276	$	27,501,467	$	33,422,719	$	37,064,394	$	8,410,956
Ratio of Earnings to Fixed Charges			3.39		4.33		3.94		3.53		2.39		1.36
(1) Divided by (2)
Ratio of Earnings to Fixed Charges and Preferred Dividends			3.26		4.15		3.79		3.42		2.33		1.34
(1) Divided by (3)