First Quarter 2017 Financial Review

Management Outlook FY17 compared to FY16 Assuming continuation of current economic & low rate environment GEAR Up initiative incorporated into this Outlook ~$50MM+ contribution from March rate rise for remainder of 2017 (assuming 25% deposit beta)1 Benefit from loan growth & wholesale debt maturities Average loans 1-2% increase, including reduction in Mortgage Banker & Energy loans Higher • 3-4% increase in remainder of portfolio • -$85MM contribution from December rate rise (assuming no deposit beta)1 Net interest income Higher • Provision Lower Noninterest income Higher Noninterest Lower expenses Income Taxes Higher • Provision of 20-30 bps (net charge-offs remainder of year in line with 1Q17) Continued solid performance of the overall portfolio Increase 4-6% • Execution of GEAR Up opportunities of ~$30MM Modest growth in treasury management, card, fiduciary & brokerage services Restructuring expenses of about $25MM-$50MM (2016 $93MM) Remaining noninterest expenses decrease 1-2% (excluding restructuring charges) . • GEAR Up savings: additional $125MM relative to 2016 savings (2016>$25MM) Increased outside processing in line with growing revenue, continued increases in technology costs & typical inflationary pressures No repeat of gain on leveraged lease terminations (2016 $13MM) Decrease 4-5% including restructuring charges ~31% of pre-tax income (33% for each remaining quarter assuming no further tax benefit from employee stock transactions) Outlook as of 4/18/17 1Estimated based on simulation modeling analysis. Refer to page F-33 of Comerica's 2016 Annual Report for further information. Comerica Bank Ⓡ com Appendix mitment Comerica Bank 15

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