SBA Communications (SBAC) S-3ASR Automatic shelf registration

Exhibit 12.1

Ratio/Deficiency of Earnings to Fixed Charges

	Year ended December 31,
	2004			2005			2006			2007			2008
	(dollars in thousands)
Earnings:
Loss from continuing operations before taxes	$	(143,313	)	$	(92,544	)	$	(132,931	)	$	(77,011	)	$	(45,726	)
Plus: fixed charges, less preferred dividends		86,076			80,413			115,945			120,569			137,661
Plus: current period amortization of interest capitalized in prior         periods		542			620			529			516			519
Less: Capitalized interest		(14	)		(85	)		(383	)		(248	)		(223	)
Total Earnings		(56,709	)		(11,596	)		(16,840	)		43,826			92,231
Fixed Charges:
Interest Expense - cash		47,460			40,511			81,283			92,498			104,253
Capitalized interest		14			85			383			248			223
Interest Expense - non cash		28,082			26,234			6,845			—			412
Amortization of Debt Issue Costs		3,445			2,850			11,584			8,534			11,671
Interest Component of Operating Leases		7,075			10,733			15,850			19,290			21,102
Total Fixed Charges		86,076			80,413			115,945			120,569			137,661
Total Deficiency	$	142,785		$	92,009		$	132,785		$	76,743		$	45,430