F.N.B. (FNB) S-3ASR Automatic shelf registration

EXHIBIT 12.1

F.N.B. Corporation and Subsidiaries

Computation of Ratio of Earnings to Fixed Charges

Dollars in thousands

	For the Three  Months Ended March 31,						For the Years Ended December 31,
	2015			2014			2014			2013		2012		2011		2010
Earnings:
Income before income taxes	$	57,312		$	48,723		$	206,670		$	162,560	$	154,183	$	119,051	$	102,536
Fixed charges, excluding interest on deposits		8,161			7,273			29,921			18,384		19,470		23,402		26,285
Less: Preferred stock dividends		(2,856	)		(3,277	)		(11,983	)		—		—		—		—
Subtotal		62,617			52,719			224,608			180,944		173,653		142,453		128,821
Interest on deposits		7,449			7,149			29,602			29,441		42,513		53,535		64,524
Total	$	70,066		$	59,868		$	254,210		$	210,385	$	216,166	$	195,988	$	193,345
Fixed charges:
Interest on borrowed funds	$	3,999		$	2,906		$	13,083		$	14,903	$	16,542	$	21,082	$	24,207
Interest component of rental expense		1,306			1,090			4,855			3,481		2,928		2,320		2,078
Preferred stock dividends		2,856			3,277			11,983			—		—		—		—
Subtotal		8,161			7,273			29,921			18,384		19,470		23,402		26,285
Interest on deposits		7,449			7,149			29,602			29,441		42,513		53,535		64,524
Total	$	15,610		$	14,422		$	59,523		$	47,825	$	61,983	$	76,937	$	90,809
Ratio of earnings to fixed charges:
Excluding interest on deposits		11.26x			12.37x			11.85x			9.84x		8.92x		6.09x		4.90x
Including interest on deposits		5.27x			5.08x			5.10x			4.40x		3.49x		2.55x		2.13x
Ratio of earnings to fixed charges and preferred stock dividends:
Excluding interest on deposits		7.67x			7.25x			7.51x			9.84x		8.92x		6.09x		4.90x
Including interest on deposits		4.49x			4.15x			4.27x			4.40x		3.49x		2.55x		2.13x