Exhibit 12(a)

M&T BANK CORPORATION
Computations of Consolidated Ratios of Earnings to Fixed Charges
(Dollars in thousands — unaudited)

	For the nine months				For the twelve months
	ended September 31,				ended December 31,
	2008		2007		2007		2006		2005		2004		2003
Excluding Interest on Deposits:
Fixed Charges:
Interest Expense (excluding interest on deposits)	$	523,844		535,279		735,257		561,686		437,820		272,538		247,316
Interest Factor Within Rent Expense (a)		18,230		15,999		21,608		20,135		19,217		19,570		17,170
Total Fixed Charges		542,074		551,278		756,865		581,821		457,037		292,108		264,486
Earnings:
Income Before Income Taxes	$	610,106		879,310		963,537		1,231,642		1,170,919		1,066,523		850,670
Fixed Charges — Excluding Preferred Stock Dividends		542,074		551,278		756,865		581,821		457,037		292,108		264,486
Total Earnings		1,152,180		1,430,588		1,720,402		1,813,463		1,627,956		1,358,631		1,115,156
Ratio of Earnings to Fixed Charges, Excluding Interest on Deposits	x	2.13		2.60		2.27		3.12		3.56		4.65		4.22
Including Interest on Deposits:
Fixed Charges:
Interest Expense	$	1,049,369		1,252,212		1,694,576		1,496,552		994,351		564,160		527,810
Interest Factor Within Rent Expense (a)		18,230		15,999		21,608		20,135		19,217		19,570		17,170
Total Fixed Charges		1,067,599		1,268,211		1,716,184		1,516,687		1,013,568		583,730		544,980
Earnings:
Income Before Income Taxes	$	610,106		879,310		963,537		1,231,642		1,170,919		1,066,523		850,670
Fixed Charges — Excluding Preferred Stock Dividends		1,067,599		1,268,211		1,716,184		1,516,687		1,013,568		583,730		544,980
Total Earnings		1,677,705		2,147,521		2,679,721		2,748,329		2,184,487		1,650,253		1,395,650
Ratio of Earnings to Fixed Charges, Including Interest on Deposits	x	1.57		1.69		1.56		1.81		2.16		2.83		2.56

(a) The portion of rents shown as representative of the interest factor is one-third of total net operating lease expenses.