For More Information:
Ronald A. Miller
Senior Vice President and Chief Financial Officer
Phone: 585-786-1102

FOR IMMEDIATE RELEASE

Financial Institutions, Inc. Reports 2004 Fourth Quarter

and Year-end Results

WARSAW, N.Y., January 27, 2005 — Financial Institutions, Inc. (NASDAQ:FISI), a holding company of community banks serving Central and Western New York, today reported net income for the fourth quarter of 2004 of $2.9 million compared with $5.1 million in net income for the third quarter of 2004 and $2.2 million in the fourth quarter of 2003. The drop in net income from the third quarter of 2004 primarily relates to a $1.9 million increase in the provision for loan losses to $4.0 million in the fourth quarter from $2.1 million in the third quarter and additional costs associated with asset quality and compliance issues. Fourth quarter 2004 net income represents a $.7 million increase over fourth quarter 2003 net income of $2.2 million. The fourth quarter 2004 provision for loan losses is $4.3 million lower than the $8.3 million provision for loan losses in the fourth quarter of 2003 and partially offset an increase of $2.3 million in noninterest expense. Diluted earnings per share for the fourth quarter of 2004 were $.22, an increase of 29% over $.17 per share for the comparable quarter last year.

For the year ended December 31, 2004, net income was $16.2 million, an increase of $2.0 million, or 14%, over 2003 net income of $14.2 million. Diluted earnings per share for 2004 were $1.31, an increase of $.18 per share over $1.13 per share for 2003. The provision for loan losses in 2004 was $13.5 million, down $9.0 million from the prior year, and was partially offset by a $3.2 million increase in salaries and benefits and a $1.6 million increase in other operating expenses.

Peter G. Humphrey, Chairman, President & CEO of Financial Institutions, Inc (FII) stated, “Our fourth quarter results continue to be impacted by the credit quality issues at several of our subsidiary banks. We have been diligently working to repair loan quality issues and believe we have made progress through the addition of new personnel and greater oversight of our subsidiary bank loan portfolio activities by the Company’s management. It will take time before these changes positively impact the entire commercial loan portfolios of our subsidiary banks. We continue to implement higher credit standards, detailed inspections of loan records, and increased centralized credit administration.”

Return on average common equity for the quarter (annualized) and the full year 2004 was 5.81% and 8.76% compared with 4.44% and 7.65% for the same periods in 2003, respectively. The improvement in return ratios was primarily a result of a reduction in the provision for loan losses in 2004 compared with the prior year. Return on average assets for the 2004 fourth quarter and the full year also improved to .52% and .74% compared with .41% and .66% for the same periods in 2003, respectively.

Asset Quality

Nonperforming assets at December 31, 2004 were $52.5 million, up $2.7 million from September 30, 2004 and up $.4 million from December 31, 2003. The ratio of nonperforming assets to total loans and other real estate was 4.18% at the end of 2004 compared with 3.87% at the end of 2003. Net loan charge-offs in the fourth quarter of 2004 were $2.2 million, up $.3 million from the third quarter of 2004 and down $6.1 million compared to the prior year’s fourth quarter. Net loan charge-offs for the full year 2004 were $9.6 million compared with $15.1 million in 2003.

Revenue

For the fourth quarter 2004, net interest income remained relatively flat with the 2003 fourth quarter at $19.0 million. Interest income from securities offset the decline in interest earned on a lower loan base. The net interest margin for the fourth quarter of 2004 was 3.90% compared with 3.96% in the prior year. Net interest income of $75.4 million for 2004 was relatively unchanged from the prior year. Net interest margin for the year 2004 declined 6 basis points to 3.89% from 3.95% in 2003.

Noninterest income for the fourth quarter of 2004 declined $.9 million, or 13%, from the same quarter in 2003. The decline is largely attributed to a drop of $.6 million in mortgage banking income, a result of lower volumes of mortgage originations and corresponding sales of mortgages in the secondary market. For the year, noninterest income was down $.7 million, or 3%, as increased fees on deposit accounts and the gain on sale of credit card loans helped to offset the lower residential mortgage banking activities and gain on the sales of securities in comparison with the prior year.

Noninterest expense

Noninterest expense for the fourth quarter of 2004 was $17.7 million, an increase of $2.3 million over the same quarter a year ago, and for the full year 2004 was $65.6 million, an increase of $4.8 million over 2003. The higher expenses reflect the increase in staff for the centralized credit administration function, the building of the loan administration team, and fees for professional services. Included in the fees for professional services are costs associated with asset quality and regulatory issues, as well as costs incurred for the implementation of the Section 404 internal control provisions of the Sarbanes-Oxley Act. The higher expenses, combined with flat revenue, resulted in an efficiency ratio of 67.03% for the 2004 fourth quarter and 62.12% for the year. This compares with 55.33% and 55.73% for the 2003 fourth quarter and full year, respectively.

Balance Sheet Trends

Average deposits grew 3% for the fourth quarter and full year 2004. The deposit growth reflects the addition of new products in the Company’s service area and the development of the customer base at new branches that have been added over the last 2 years.

Total loans declined 7% to $1.26 billion as of December 31, 2004 compared with $1.35 billion at the end of the prior year. Loan origination has slowed as the Company has implemented more stringent underwriting requirements, implemented training on the new credit processes and focused resources on the existing loan portfolio.

Mr. Humphrey noted, “During 2004, the Company has increased the staff and resources available to its Chief Risk Officer and the centralized credit administration function that reports to him. Corporate commercial risk officers with credit administration oversight responsibility have been added at the Company level to support our bank subsidiaries. The position of Chief of Community Banking has been created and filled, to provide greater consistency and oversight of the commercial-related loan administration function at all four bank subsidiaries. New Board members have been added at our National Bank of Geneva (“NBG”) and Bath National Bank (“BNB”) subsidiaries, and the Board-level compliance committees have been reorganized, with access to an outside consultant experienced in regulatory compliance matters. Centralized control has been implemented for all risk-rating reviews and Corporate Credit Administration has completed a comprehensive special review of our commercial-related loan portfolio.”

Mr. Humphrey went on to say, “We continue to work diligently with our regulators to address the remaining outstanding issues contained in NBG and BNB’s formal agreements with the Office of the Comptroller of the Currency (“OCC”). While we still face challenges, we are encouraged by our progress and will work hard to continue it.”

About Financial Institutions, Inc.

FII is the bank holding company parent of Wyoming County Bank, The National Bank of Geneva, Bath National Bank, and First Tier Bank and Trust with $2.2 billion in assets. Its four banks provide a wide range of consumer and commercial banking services to individuals, municipalities, and businesses through a network of 49 offices and 71 ATMs in Western and Central New York State. FII’s Financial Services Group also provides diversified financial services to its customers and clients, including brokerage, trust, insurance and employee benefits and compensation consulting. More information on FII and its subsidiaries is available through the Company web site at www.fiiwarsaw.com.

Safe Harbor Statement

This press release contains forward-looking statements as defined by federal securities laws. These statements may address issues that involve significant risks, uncertainties, estimates and assumptions made by management. Actual results could differ materially from current beliefs or projections. There are a number of important factors that could affect the Company’s forward-looking statements which include the ability of the Company to implement the necessary changes to be in compliance with the formal agreements with the OCC, the effectiveness of the changes the Company is making, quality of collateral associated with nonperforming loans, the ability of customers to continue to make payments on criticized or substandard loans, the speed or cost of resolving bad loans, the ability to hire and train personnel, the economic conditions in the area the Company operates, customer preferences, the competition and other factors discussed in the Company’s filings with the Securities and Exchange Commission. The Company undertakes no obligation to revise these statements following the date of this press release.

TABLES FOLLOW.

                                                 
FINANCIAL INSTITUTIONS, INC. AND SUBSIDIARIES    
Consolidated Statements of Income and Other Data    
(Dollars in thousands, except per share amounts)    
(Unaudited)    
                    Three months ended        
                    December 31,        
                    2004   2003   $ Change   % Change
Interest income
  $ 26,814     $ 26,849     $ (35 )     0 %
Interest expense
    7,789       7,922       (133 )     (2 )%
 
                               
   Net interest income
    19,025       18,927       98       1 %
Provision for loan losses
    4,017       8,327       (4,310 )     (52 )%
 
                               
   Net interest income after provision for loan losses
    15,008       10,600       4,408       42 %
 
                                               
Noninterest income:
                               
   Service charges on deposits
    3,014       3,062       (48 )     (2 )%
   Financial services group fees and commissions
    1,345       1,582       (237 )     (15 )%
   Mortgage banking activities
    606       1,187       (581 )     (49 )%
   Gain on sale and call of securities
    160       18       142       789 %
   Other
    769       902       (133 )     (15 )%
    
                               
      Total noninterest income
    5,894       6,751       (857 )     (13 )%
 
                                               
Noninterest expense:
                               
   Salaries and employee benefits
    9,569       8,417       1,152       14 %
   Other
    8,091       6,987       1,104       16 %
    
                               
      Total noninterest expense
    17,660       15,404       2,256       15 %
Income before income taxes
    3,242       1,947       1,295       67 %
Income taxes
    350       (299 )     649       217 %
 
                               
Net income
    2,892       2,246       646       29 %
Preferred stock dividends
    373       373       -       0 %
 
                    -          
Net income available to common shareholders
  $ 2,519     $ 1,873     $ 646       34 %
 
                               
Taxable-equivalent net interest income
  $ 20,141     $ 20,032     $ 109       1 %
 
                               
 
                                               
Per common share data:
                               
   Net income — basic
  $ 0.22     $ 0.17     $ 0.05       29 %
   Net income — diluted
  $ 0.22     $ 0.17     $ 0.05       29 %
   Cash dividends declared
  $ 0.16     $ 0.16     $ 0.00       0 %
   Book value
  $ 15.14     $ 14.81     $ 0.33       2 %
 
                                               
Common shares outstanding:
                               
   Weighted average shares — basic
    11,214,777       11,165,806                  
   Weighted average shares — diluted
    11,290,331       11,249,122                  
   Period end actual
    11,249,075       11,168,310                  

1

                         
    FINANCIAL INSTITUTIONS, INC. AND SUBSIDIARIES
    Additional Data
    (Dollars in thousands, except per share amounts)
    (Unaudited)
            Three months ended
            December 31,
            2004   2003
Performance ratios, annualized
               
   Return on average assets
    0.52 %     0.41 %
   Return on average common equity
    5.81 %     4.44 %
   Common dividend payout ratio
    72.73 %     94.12 %
   Net interest margin (tax-equivalent)
    3.90 %     3.96 %
   Efficiency ratio
    67.03 %     55.33 %
Asset quality data:
                       
   Past due over 90 days and accruing
  $ 2,018     $ 1,709  
   Restructured loans
          3,069  
   Nonaccrual loans
    49,264       46,672  
   Other real estate owned (ORE)
    1,196       653  
 
                       
   Total nonperforming assets
  $ 52,478     $ 52,103  
 
                       
   Net loan charge-offs
  $ 2,199     $ 8,316  
Asset quality ratios:
                       
   Nonperforming loans to total loans
    4.09 %     3.82 %
   Nonperforming assets to total loans and ORE
    4.18 %     3.87 %
   Allowance for loan losses to total loans
    2.63 %     2.16 %
   Allowance for loan losses to nonperforming loans
    64 %     56 %
   Net loan charge-offs to average loans (annualized)
    0.70 %     2.44 %
Capital ratios:
                       
   Average common equity to average total assets
    7.85 %     7.78 %
   Leverage ratio
    7.30 %     7.04 %
   Tier 1 risk-based capital ratio
    11.50 %     10.20 %
   Risk-based capital ratio
    12.76 %     11.44 %

2

FINANCIAL INSTITUTIONS, INC. AND SUBSIDIARIES
Consolidated Statements of Income and Other Data
(Dollars in thousands, except per share amounts)
(Unaudited)

                                                 
                    Twelve months ended        
                    December 31,        
                    2004   2003   $ Change   % Change
Interest income
  $ 106,175     $ 111,450     $ (5,275 )     (5 )%
Interest expense
    30,770       35,949       (5,179 )     (14 )%
 
                               
   Net interest income
    75,405       75,501       (96 )     0 %
Provision for loan losses
    13,476       22,526       (9,050 )     (40 )%
 
                               
Net interest income after provision for loan losses
    61,929       52,975       8,954       17 %
 
                                               
Noninterest income:
                               
   Service charges on deposits
    11,987       11,461       526       5 %
   Financial services group fees and commissions
    5,733       5,692       41       1 %
   Mortgage banking activities
    2,147       4,036       (1,889 )     (47 )%
   Gain on sale and call of securities
    248       1,041       (793 )     (76 )%
   Gain on sale of credit card loans
    1,177       -       1,177       N/A  
   Other
    4,079       3,842       237       6 %
    
                               
      Total noninterest income
    25,371       26,072       (701 )     (3 )%
 
                                               
Noninterest expense:
                               
   Salaries and employee benefits
    37,009       33,825       3,184       9 %
   Other
    28,582       26,998       1,584       6 %
    
                               
      Total noninterest expense
    65,591       60,823       4,768       8 %
Income before income taxes
    21,709       18,224       3,485       19 %
Income taxes
    5,493       3,977       1,516       38 %
 
                               
Net income
    16,216       14,247       1,969       14 %
Preferred stock dividends
    1,495       1,495       -       0 %
 
                    -          
Net income available to common shareholders
  $ 14,721     $ 12,752     $ 1,969       15 %
 
                               
Taxable-equivalent net interest income
  $ 79,886     $ 79,979     $ (93 )     0 %
 
                               
 
                                               
Per common share data:
                               
   Net income — basic
  $ 1.32     $ 1.14     $ 0.18       16 %
   Net income — diluted
  $ 1.31     $ 1.13     $ 0.18       16 %
   Cash dividends declared
  $ 0.64     $ 0.64     $ 0.00       0 %
 
                                               
Common shares outstanding:
                               
   Weighted average shares — actual
    11,191,475       11,148,042                  
   Weighted average shares — diluted
    11,258,900       11,245,939                  
   Period end
    11,249,075       11,168,310                  
 
                                               
Performance ratios:
                               
   Return on average assets
    0.74 %     0.66 %                
   Return on average common equity
    8.76 %     7.65 %                
   Common dividend payout ratio
    48.48 %     56.14 %                
   Net interest margin (tax-equivalent)
    3.89 %     3.95 %                
   Efficiency ratio
    62.12 %     55.73 %                
 
                                               
Asset quality data and ratio:
                               
   Net loan charge-offs
  $ 9,554     $ 15,121                  
   Net loan charge-offs to average loans
    0.74 %     1.11 %                
                                                 
FINANCIAL INSTITUTIONS, INC. AND SUBSIDIARIES    
Consolidated Statements of Financial Condition    
(Dollars in thousands)    
(Unaudited)    
                    December 31,        
                    2004   2003   $ Change   % Change
ASSETS
                               
Cash, due from banks and interest-bearing deposits
  $ 45,279     $ 45,635     $ (356 )     (1 )%
Federal funds sold
    806       40,006       (39,200 )     (98 )%
Investment securities
    766,515       652,095       114,420       18 %
Loans
            1,255,053       1,345,317       (90,264 )     (7 )%
Less: Allowance for loan losses
    32,986       29,064       3,922       13 %
 
                               
   Loans, net
    1,222,067       1,316,253       (94,186 )     (7 )%
Goodwill
    41,371       40,621       750       2 %
Other assets
    84,019       79,122       4,897       6 %
 
                               
      Total assets
  $ 2,160,057     $ 2,173,732     $ (13,675 )     (1 )%
 
                                               
LIABILITIES AND SHAREHOLDERS’ EQUITY
                               
 
                                               
Deposits:
                               
   Demand
  $ 289,582     $ 264,990     $ 24,592       9 %
   Savings, money market, and interest-bearing checking
    789,550       784,219       5,331       1 %
   Certificates of deposit
    739,817       769,682       (29,865 )     (4 )%
    
                               
      Total deposits
    1,818,949       1,818,891       58       0 %
Short-term borrowings
    35,554       50,025       (14,471 )     (29 )%
Long-term borrowings
    80,380       87,520       (7,140 )     (8 )%
Junior subordinated debentures issued to unconsolidated subsidiary trust
    16,702       16,702       -       0 %
Other liabilities
    20,462       17,491       2,971       17 %
 
                               
      Total liabilities
    1,972,047       1,990,629       (18,582 )     (1 )%
 
                                               
Shareholders’ equity:
                               
   Preferred equity
    17,722       17,735       (13 )     0 %
   Common equity
    170,288       165,368       4,920       3 %
    
                               
      Total shareholders' equity (1)
    188,010       183,103       4,907       3 %
 
                                               
      Total liabilities and shareholders' equity
  $ 2,160,057     $ 2,173,732     $ (13,675 )     (1 )%
 
                                               
(1) Includes the after-tax impact of net unrealized gains on investment securities classified as available for sale of $3,884 and $8,197 at December 31, 2004 and 2003, respectively.

3

                                                 
FINANCIAL INSTITUTIONS, INC. AND SUBSIDIARIES    
Consolidated Average Statements of Financial Condition    
(Dollars in thousands)    
(Unaudited)    
                    Three months ended        
                    December 31,        
                    2004   2003   $ Change   % Change
ASSETS
                               
Cash, due from banks and interest-bearing deposits
  $ 43,851     $ 47,924     $ (4,073 )     (8 )%
Federal funds sold
    37,109       41,617       (4,508 )     (11 )%
Investment securities
    768,179       611,429       156,750       26 %
Loans
            1,259,101       1,361,932       (102,831 )     (8 )%
Less: Allowance for loan losses
    31,450       28,300       3,150       11 %
 
                               
   Loans, net
    1,227,651       1,333,632       (105,981 )     (8 )%
Goodwill
    40,950       40,621       329       1 %
Other assets
    80,837       78,085       2,752       4 %
 
                               
      Total assets
  $ 2,198,577     $ 2,153,308     $ 45,269       2 %
 
                                               
LIABILITIES AND SHAREHOLDERS’ EQUITY
                               
 
                                               
Deposits:
                               
   Demand
  $ 279,590     $ 263,060     $ 16,530       6 %
   Savings, money market, and interest-bearing checking
    837,608       811,031       26,577       3 %
   Certificates of deposit
    740,956       730,950       10,006       1 %
    
                               
      Total deposits
    1,858,154       1,805,041       53,113       3 %
Short-term borrowings
    36,068       57,399       (21,331 )     (37 )%
Long-term borrowings
    80,815       71,813       9,002       13 %
Junior subordinated debentures issued to unconsolidated subsidiary trust
    16,702       16,200       502       3 %
Other liabilities
    16,607       17,601       (994 )     (6 )%
 
                               
      Total liabilities
    2,008,346       1,968,054       40,292       2 %
 
                                               
Shareholders’ equity:
                               
Preferred equity
    17,729       17,735       (6 )     0 %
Common equity
    172,502       167,519       4,983       3 %
 
                               
      Total shareholders' equity
    190,231       185,254       4,977       3 %
 
                                               
      Total liabilities and shareholders' equity
  $ 2,198,577     $ 2,153,308     $ 45,269       2 %
 
                                               

4

                                                 
FINANCIAL INSTITUTIONS, INC. AND SUBSIDIARIES    
Consolidated Average Statements of Financial Condition    
(Dollars in thousands)    
(Unaudited)    
                    Twelve months ended        
                    December 31,        
                    2004   2003   $ Change   % Change
ASSETS
                               
Cash, due from banks and interest-bearing deposits
  $ 44,182     $ 44,249     $ (67 )     0 %
Federal funds sold
    35,170       45,286       (10,116 )     (22 )%
Investment securities
    725,500       19,328       106,172       17 %
Loans
            1,295,332       1,357,629       (62,297 )     (5 )%
Less: Allowance for loan losses
    30,583       25,135       5,448       22 %
 
                               
   Loans, net
    1,264,749       ,332,494       (67,745 )     (5 )%
Goodwill
    40,816       40,616       200       0 %
Other assets
    80,163       73,764       6,399       9 %
 
                               
      Total assets
  $ 2,190,580     $ 2,155,737     $ 34,843       2 %
 
                                               
LIABILITIES AND SHAREHOLDERS’ EQUITY
                               
 
                                               
Deposits:
                               
   Demand
  $ 267,721     $ 45,234     $ 22,487       9 %
   Savings, money market, and interest-bearing checking
    820,571       800,854       19,717       2 %
   Certificates of deposit
    760,453       744,022       16,431       2 %
    
                               
      Total deposits
    1,848,745       1,790,110       58,635       3 %
Short-term borrowings
    40,156       61,954       (21,798 )     (35 )%
Long-term borrowings
    83,550       81,795       1,755       2 %
Junior subordinated debentures issued to unconsolidated subsidiary trust
    16,702       16,200       502       3 %
Other liabilities
    15,670       21,165       (5,495 )     (26 )%
 
                               
      Total liabilities
    2,004,823       1,971,224       33,599       2 %
 
                                               
Shareholders’ equity:
                               
   Preferred equity
    17,733       17,738       (5 )     0 %
   Common equity
    168,024       166,775       1,249       1 %
    
                               
      Total shareholders' equity
    185,757       184,513       1,244       1 %
 
                                               
      Total liabilities and shareholders' equity
  $ 2,190,580     $ 2,155,737     $ 34,843       2 %
 
                                               

5