Comerica Incorporated Revised 2013 Financial ResultsJanuary 21, 2014 Financial Summary 2 4Q13 3Q13 2013 2012 Diluted income per common share1 $0.62 $0.78 $2.85 $2.67 Net interest income $430 $412 $1,672 $1,728 Loan accretion 23 8 49 71 Provision for credit losses 9 8 46 79 Noninterest income 204 214 826 818 Noninterest expenses 473 417 1,722 1,757 Litigation related expenses 52 (4) 52 23 Net income 117 147 541 521 Total average loans $44,054 $44,094 $44,412 $43,306 Total average deposits 52,769 51,865 51,711 49,533 Tier 1 common capital ratio3 10.56%2 10.72% Basel III Tier 1 common capital ratio3,4 10.3% 10.4% Average diluted shares (millions) 186 187 $ in millions, except per share data ● 1Calculated using net income attributable to common shares ● 2Estimated ● 3See Supplemental Financial Data slides for a reconciliation of non-GAAP financial measures ● 4Estimated ratios based on the standardized approach in the final rule and excluding most elements of accumulated other comprehensive income (AOCI)

Full-Year 2013 Results 3 $ in millions ● Full-year 2013 compared to full-year 2012 ● 1Shares repurchased under the share repurchase program  Net income up $20MM or 4% from 2012  Average loans up 3%, driven by National Dealer, general Middle Market and Energy  Average deposits up 4%, growth across all markets  Customer-driven fees up 2%, driven by Fiduciary and Card fees  Noninterest expenses down 2%, driven by absence of restructuring charges. Continued tight expense control was offset by an increase in legal reserves due to an adverse litigation outcome EPS of $2.85 up 7% from 2012 FY13 From FY12Chg $ Chg %Total average loans 44,412 $1,106 3% Commercial loans 27,971 1,747 7 Total average deposits 51,711 2,178 4 Noninterest-bearing deposits 22,379 1,375 7 Net interest income 1,672 (56) (3) Loan accretion 49 (22) (31) Provision for credit losses 46 (33) (42) Net loan charge-offs 73 (97) (57) Noninterest income 826 8 1 Customer-driven fee income 763 13 2 Noninterest expenses 1,722 (35) (2) Net income 541 20 4 Shares repurchased1 7.4MM shares or $287MM Key Performance Drivers Fourth Quarter 2013 Results 4 $ in millions ● 4Q13 compared to 3Q13 ● 1Shares repurchased under the share repurchase program Key Performance Drivers  Period-end loan growth across almost all businesses  Net interest income growth due to better than expected accretion from purchased credit-impaired loans  Customer-driven fees impacted by strong 3Q13, slower economic activity and regulatory headwinds  Noninterest expenses impacted by an increase in legal reserves due to an adverse litigation outcome 4Q13 Change From3Q13 4Q12Total average loans 44,054 (40) (65) Commercial loans 27,683 (76) 221 Total average deposits 52,769 904 1,487 Noninterest-bearing deposits 23,532 1,153 774 Net interest income 430 18 6 Loan accretion 23 15 10 Provision for credit losses 9 1 (7) Net loan charge-offs 13 (6) (24) Noninterest income 204 (10) -- Customer-driven fee income 190 (5) (1) Noninterest expenses 473 56 46 Net income 117 (30) (13) Shares repurchased1 1.7MM shares or $72MM Period-end Loans up $1.3B or 3%

Supplemental Financial DataReconciliation of non-GAAP financial measures with financial measures defined by GAAP ($ in millions) 5 12/31/13 9/30/13 6/30/13 3/31/13 12/31/12 Tier 1 and Tier 1 common capital1,2Risk-weighted assets1,2Tier 1 and Tier 1 common capital ratio2 6,89565,31710.56% 6,86264,02710.72% 6,80065,22010.43% 6,74865,09910.37% 6,70566,11510.14% Total shareholders’ equityLess: GoodwillLess: Other intangible assets $7,15363517 $6,96963518 $6,91163520 $6,98863521 $6,94263522 Tangible common equity $6,501 $6,316 $6,256 $6,332 $6,285Total assetsLess: GoodwillLess: Other intangible assets $65,22763517 $64,67063518 $62,94763520 $64,88563521 $65,06963522Tangible assets $64,575 $64,017 $62,292 $64,229 $64,412Tangible common equity ratio 10.07% 9.87% 10.04% 9.86% 9.76% The Tier 1 common capital ratio removes preferred stock and qualifying trust preferred securities from Tier 1 capital as defined by and calculated in conformity with bank regulations. The tangible common equity ratio removes preferred stock and the effect of intangible assets from capital and the effect of intangible assets from total assets.The Corporation believes these measurements are meaningful measures of capital adequacy used by investors, regulators, management and others to evaluate the adequacy of common equity and to compare against other companies in the industry.1Tier 1 Capital and risk-weighted assets as defined and calculated in accordance with regulation.2December 31, 2013 Tier 1 Capital and Risk-Weighted assets are estimated. Supplemental Financial DataTier 1 Common Equity under Basel III ($ in millions) 6 The Tier 1 common capital ratio removes preferred stock and qualifying trust preferred securities from Tier 1 capital as defined by and calculated in conformity with bank regulations. The Basel III Tier 1 common capital ratio further adjusts Tier 1 common capital and risk-weighted assets to account for the final rule approved by U.S. banking regulators in July 2013 for the U.S. adoption of the Basel III regulatory capital framework. The final Basel III capital rules are effective January 1, 2015 for banking organizations subject to the standardized approach. The Corporation believes these measurements are meaningful measures of capital adequacy used by investors, regulators, management and others to evaluate the adequacy of common equity and to compare against other companies in the industry.1Tier 1 Capital and risk-weighted assets as defined in accordance with regulation.2December 31, 2013 Tier 1 Capital and Risk-Weighted assets are estimated.3Estimated ratios based on the standardized approach in the final rule for the U.S. adoption of the Basel III regulatory capital framework and excluding most elements of AOCI. Basel III Tier 1 Common Capital Ratio 12/31/13 9/30/13 6/30/13 3/31/13 12/31/12 Tier 1 common capital2Basel III adjustments3 $6,895(6) $6,862(4) $6,800-- $6,748(1) $6,705(39) Basel III Tier 1 common capital3 $6,889 $6,858 $6,800 $6,747 $6,666 Risk-weighted assets1,2Basel III adjustments3 $65,3171,735 $64,0271,726 $65,2202,091 $65,0991,996 $66,1151,854Basel III risk-weighted assets3 $67,052 $65,753 $67,311 $67,095 $67,969 Tier 1 common capital ratio2Basel III Tier 1 common capital ratio3 10.6%10.3% 10.7%10.4% 10.4%10.1% 10.4%10.1% 10.1%9.8%