51 West Pearl Street, Coldwater, Michigan 49036
(Address of Principal Executive Offices) (Zip Code)
(517) 279-5500
(Registrant's Telephone Number, Including Area Code)

          Securities Registered Pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the past 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. YES x    NO o

Indicate by check mark if disclosure of delinquent filers in response to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. o

Indicate by check mark whether the registrant is an accelerated filer (as defined in Rule 12b-2 of the Act). YES o    NO x

The aggregate market value of the registrant's common stock, par value $2.50 per share (based on the last sale of the day) held by non-affiliates of the registrant as of June 30, 2003 was approximately $26,590,000. For purposes of this computation, all executive officers, directors and 5% shareholders of the registrant have been assumed to be affiliates. Certain of such persons may disclaim that they are affiliates of the registrant. This determination of affiliate status is not necessarily a conclusive determination for other purposes.

The number of shares outstanding of the registrant's common stock as of February 27, 2004 was 1,849,328 shares.

DOCUMENTS INCORPORATED BY REFERENCE

PART I

INTRODUCTORY NOTE

          This Annual Report on Form 10-K may be deemed to contain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended and Section 21E of the Securities Exchange Act of 1934, as amended. The forward-looking statements included are based on current expectations that involve a number of risks and uncertainties. Regarding the Company's operating results, business prospects or any other aspect of the Company, please be advised that the Company's actual financial condition, operating results and business performance may differ materially from that projected or estimated by the Company in forward-looking statements. The differences may be caused by a variety of factors, including but not limited to, adverse economic conditions, intense competition, including intensification of price competition and entry of new competitors and products, adverse federal, state and local government regulation, inadequate capital, unexpected costs and oper ating deficits, increases in general and administrative costs, lower sales and revenue than forecast, loss of customers, inability to raise prices, failure to obtain new customers, litigation and administrative proceedings involving the Company, the possible acquisition of new businesses that result in operating losses or that do not perform as anticipated, resulting in unanticipated losses, the possible fluctuation and volatility of the Company's operating results, financial condition and stock price, losses incurred in litigation and settling cases, dilution in the Company's ownership of its business, adverse publicity and news coverage, inability to carry out marketing and sales plans, loss or retirement of key executives, changes in interest rates, inflationary factors, and other specific risks that may be alluded to in this Annual Report or in other reports issued by the Company. In addition, the business and operations of the Company are subject to substantial risks, which increase the uncertainty inhe rent in the forward-looking statements. In light of the significant uncertainties inherent in the forward-looking information included herein, the inclusion of such information should not be regarded as a representation by the Company or any other person that the objectives or plans of the Company will be achieved.

ITEM 1.          BUSINESS

Overview

          The registrant, Southern Michigan Bancorp, Inc. (the "Company"), is a registered bank holding company incorporated under the laws of the State of Michigan, headquartered in Coldwater, Michigan. The Company was formed in 1982 for the purpose of acquiring all of the outstanding shares of Southern Michigan National Bank, which it did in November, 1982. In December, 1992, Southern Michigan National Bank converted its charter to that of a Michigan state banking corporation and changed its name to, Southern Michigan Bank & Trust (the "Bank"), with its main office located at 51 West Pearl Street, Coldwater, Michigan 49036. The Bank operates 10 branch offices in the primarily rural areas of Branch, Hillsdale, and Calhoun counties in southwestern Michigan. In addition to the operations of the Bank described below, the Company owns and leases certain real estate to the Bank and third parties (see Item 2. Properties below); and SMB&T Financial Services, Inc., a subsidiary o f the Bank, has been established to provide insurance and investment services, which services currently consist of the sale of certain insurance products to the Bank and limited sales of insurance products to the public. None of such activities are significant to the operations of the Company. In August, 2000, SMB Mortgage Company was established as a subsidiary of the Bank. At that time all residential mortgage loans held by the Bank and all residential mortgage loan applications in the pipeline were transferred to SMB Mortgage Company. All of the residential mortgage activities previously conducted by the Bank were undertaken by SMB Mortgage Company.

Banking Services

          The Bank offers a full range of banking services to individuals, businesses, governmental entities, and other institutions. These services include checking, savings, and NOW accounts, time deposits, safe deposit facilities, and money transfers. The Bank's lending operations provide secured and unsecured commercial and personal loans, real estate loans, consumer installment loans, lines of credit, and accounts receivable financing.

          The Bank's Trust Department offers a wide variety of fiduciary services to individuals, businesses, not-for-profit organizations, and governmental entities, including services as trustee for personal, corporate, pension, profit sharing, and other employee benefit trusts. The Bank also provides security custodial services as an agent, acts as the

          Residential mortgage loans are originated by SMB Mortgage Company. Some residential mortgage loans are retained by SMB Mortgage Company while others are sold to investors in the secondary market. When SMB Mortgage Company sells originated mortgage loans to investors, it makes a determination to either retain or sell the servicing rights to such loans.

          The Bank also offers securities brokerage services through an unaffiliated broker. The Bank maintains correspondent banking relationships with several larger banks, which correspondent relationships concern check clearing operations, transfer of funds, loan participations, the purchase and sale of federal funds, and other similar services.

Competition

          The banking business in the Bank's market area is highly competitive. The Bank competes with other banks, savings and loan associations, credit unions, and finance companies. Banks and other financial institutions from surrounding areas maintain branches within the Bank's service area and offer additional competition. The Bank is also faced with increasing competition from non-depository financial intermediaries, such as large retailers, investment banks, and securities brokerage firms.

Supervision and Regulation

General

          Bank holding companies and banks are highly regulated by both state and federal agencies. As a bank holding company, the Company is subject to supervision and regulation by the Federal Reserve Board (the "FRB") pursuant to the Bank Holding Company Act of 1956, as amended (the "BHCA"). The BHCA restricts the product range of a bank holding company by circumscribing the types of businesses it may own or acquire. The BHCA limits a bank holding company to owning and managing banks or companies engaged in activities determined by the FRB to be closely related to banking as to be a proper incident thereto. The BHCA requires a bank holding company to obtain the prior approval of the FRB before acquiring a non-banking company, or substantially all of the assets of a bank or a bank holding company, or direct or indirect ownership or control of more than five percent of the voting shares of a bank or a bank holding company.

          Under FRB regulations, the Company is required to serve as a source of financial and managerial strength to the Bank and must conduct its operations in a safe and sound manner.

          The Bank is subject to regulation, supervision, and regular bank examinations by the Federal Deposit Insurance Corporation ("FDIC") and the Michigan Office of Financial and Insurance Services ("OFIS"). OFIS is the Bank's chartering authority and primary regulator. Under OFIS and FDIC regulations, the Bank is required to maintain reserves against its deposits and to maintain certain levels of capital and surplus. In addition, the Bank is subject to restrictions on the nature and amount of loans which may be made, the types and amounts of investments it may make, and certain limitations on the payment of dividends to its sole shareholder, the Company.

Dividend Restrictions

          The Company's principal source of income consists of dividends paid by the Bank on its common stock (all of which is owned by the Company). Michigan law restricts the Bank's ability to pay dividends to its shareholder. Under the Michigan Banking Code of 1999, as amended, no dividend may be declared by the Bank in an amount greater than net income then on hand after deducting losses and bad debts. After payment of a dividend, the Bank must have a surplus amounting to not less than 20% of its capital. In addition, if the surplus of the Bank is less than the amount of its capital, before a dividend may be declared, the Bank must transfer to surplus not less than 10% of the net income of the Bank for the preceding 6 months in the case of quarterly or semiannual dividends or not less than 10% of its net profits for the preceding two consecutive 6 month periods in the case of annual dividends. Dividends cannot be paid from the Bank's capital or surplus.

          The payment of dividends by the Company and the Bank is also affected by various regulatory requirements and policies, such as the requirement to maintain adequate capital above regulatory guidelines. The "prompt corrective action" provisions of the Federal Deposit Insurance Corporation Improvement Act of 1991 ("FDICIA") impose further restrictions on the payment of dividends by insured banks which fail to meet specified capital levels and, in some cases, their parent bank holding companies. FDICIA generally prohibits a depository institution from making any capital distribution (including payment of a dividend) or paying any management fee to its holding company if the depository institution would thereafter be undercapitalized (see "Capital Requirements"). These regulations and restrictions may limit the Company's ability to obtain funds from the Bank for the Company's cash needs, including funds for acquisitions, payments of dividends and interest, and the payment of operating expenses. Based on the Bank's balance sheet as of December 31, 2003, the Bank could pay a dividend to the Company in the amount of $9,991,000 without prior regulatory approval.

          The FDIC may prevent an insured bank from paying dividends if the bank is in default of payment of any assessment due to the FDIC. In addition, payment of dividends by a bank may be prevented by the applicable federal regulatory authority if such payment is determined, by reason of the financial condition of such bank, to be an unsafe and unsound banking practice. The FRB has issued a policy statement providing that bank holding companies and insured banks should generally only pay dividends out of current operating earnings.

Federal Regulation

          The following is a summary of certain statutes and regulations affecting the Company and the Bank. This summary is qualified in its entirety by such statutes and regulations, which are subject to change based on pending and future legislation and action by regulatory agencies. Proposals to change the laws and regulations governing the operation of banks and companies which control banks and other financial institutions are frequently raised in Congress. The likelihood of any major legislation and the impact such legislation might have on the Company or the Bank are, however, impossible to predict.

USA Patriot Act

          Enacted in 2001, the Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001 (the "USA Patriot Act") requires each financial institution to implement additional policies and procedures with respect to money laundering, suspicious activities, currency transaction reporting, and currency crimes. The USA Patriot Act also contains a provision encouraging cooperation among financial institutions, regulatory authorities and law enforcement authorities with respect to individuals, entities and organizations engaged in, or reasonably suspected of engaging in, terrorist acts or money laundering activities.

Gramm-Leach-Bliley

          Enacted late in 1999, the Gramm-Leach-Bliley Act ("Gramm-Leach-Bliley"), broadens the scope of financial services that banks may offer to consumers, essentially removing the barriers erected during the Depression that separated banks and securities firms, closes the loophole which permitted commercial enterprises to own and operate a thrift institution, and provides some new consumer protections with respect to privacy issues and ATM usage fees. Gramm-Leach-Bliley permits affiliations between banks, securities firms and insurance companies (which affiliations were previously prohibited under the Glass-Steagall Act). Under Gramm-Leach-Bliley, a bank holding company may qualify as a financial holding company and thereby offer expanded range of financial oriented products and services which products and services may not be offered by bank holding companies. To qualify as a financial holding company, a bank holding company's subsidiary depository institutions must be well-ma naged, well-capitalized and have received a "satisfactory" rating on its latest examination under the Community Reinvestment Act. Gramm-Leach-Bliley provides for some regulatory oversight by the Securities and Exchange Commission for bank holding companies engaged in certain activities, and reaffirms that insurance activities are to be regulated on the state level. States, however, may not prevent depository institutions and their affiliates from engaging in insurance activities. Commercial enterprises are no longer able to establish or acquire a thrift institution and thereby become a unitary thrift holding company. Thrift institutions may only be established or acquired by financial organizations. Gramm-Leach-Bliley provides new consumer protections with respect to the transfer and use of a consumer's nonpublic personal information and generally enables financial institution customers to "opt-out" of the dissemination of their personal financial information to unaffiliated third parties.

Riegle-Neal

          Prior to September 29, 1995, the BHCA prohibited a bank holding company from acquiring shares of any bank located outside the state in which the operations of the bank holding company's banking subsidiaries were primarily conducted unless the acquisition was specifically authorized by statute of the state of the bank whose shares were to be acquired. Under the Riegle-Neal Interstate Banking and Branching Efficiency Act of 1994 (the "Riegle-Neal Act"), the restriction on interstate bank acquisitions was repealed effective September 29, 1995. The FRB is now generally authorized to approve bank acquisitions by out-of-state bank holding companies that are adequately capitalized and managed irrespective of the permissibility of such acquisition under state law, but subject to any state requirement that the bank has been organized and operating for a minimum period of time, not to exceed five (5) years.

          Each State is permitted to prohibit interstate branch acquisitions (i.e., acquisition of a branch without acquisition of the entire target bank or the establishment of de novo branches) and to examine acquired and de novo branches of out-of-state banks with respect to compliance with certain host State laws.

FDICIA

          In December 1991, FDICIA was enacted, substantially revising the bank regulatory and funding provisions of the Federal Deposit Insurance Act and making revisions to several other federal banking statutes. Among other things, FDICIA requires the federal banking agencies to take "prompt corrective action" in respect of depository institutions that do not meet minimum capital requirements. FDICIA establishes five capital tiers: "well-capitalized," "adequately capitalized," "undercapitalized," "significantly under capitalized" and "critically undercapitalized." A depository institution's capital tier will depend upon where its capital levels are in relation to various relevant capital measures, which will include a risk-based capital measure and a leverage ratio capital measure, and certain other factors. As of December 31, 2003, the Bank's capital ratios exceed the requirements to be considered a well-capitalized institution under FDIC regulation.

          FDICIA also contains a variety of other provisions that may affect the operations of depository institutions including reporting requirements, regulatory standards for real estate lending, "truth in savings" provisions, the requirement that a depository institution give 90 days prior notice to customers and regulatory authorities before closing any branch, and a prohibition on the acceptance or renewal of brokered deposits by depository institutions that are not well capitalized or are adequately capitalized and have not received a waiver from the FDIC.

FIRREA

          Under the Financial Institutions Reform and Recovery and Enforcement Act of 1989 ("FIRREA"), a depository institution insured by the FDIC is liable for any loss incurred by, or reasonably expected to be incurred by, the FDIC in connection with (i) the default of a commonly controlled FDIC-insured depository institution, or (ii) any assistance provided by the FDIC to any commonly controlled FDIC-insured depository institution "in danger of default." "Default" is defined generally as the appointment of a conservator or receiver and "in danger of default" is defined as the existence of certain conditions indicating that a default is likely to occur in the absence of regulatory assistance.

Transactions with Affiliates and Insiders

          The Bank and the Company are affiliates of each other and, as such, are subject to certain federal restrictions with respect to loans and extensions of credit to the Company and other Company affiliates, investments in the Company's and its affiliates' securities, acceptance of such securities as collateral for loans to any borrowers, and leases, services and other agreements between the Bank and the Company. Additionally, regulations allow a bank to extend credit to the bank's and its affiliates' executive officers, directors, principal shareholders, and their related interests, only if the loan is made on substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with non-insiders, and if credit underwriting standards are

Deposit Insurance

          Deposits held by the Bank are insured, to the extent permitted by law, by the Bank Insurance Fund ("BIF") administered by the FDIC. As required under FDICIA, the FDIC has established a system of risk-based deposit insurance premiums. Under this system each insured institution's assessment is based on the probability that the BIF will incur a loss related to that institution, the likely amount of the loss, and the revenue needs of the BIF. Each financial institution is assigned to one of three capital groups -- well capitalized, adequately capitalized or undercapitalized -- and further assigned to one of three subgroups within a capital group, on the basis of supervisory evaluations by the institution's primary federal and, if applicable, state supervisors and other information relevant to the institution's financial condition and the risk posed to the applicable insurance fund. The assessment rate applicable to the bank in the future will depend in part upon the risk ass essment classification assigned to the Bank by the FDIC and in part on the BIF assessment schedule adopted by the FDIC.

Capital Requirements

          The FRB has imposed risk-based capital guidelines applicable to the Company. These guidelines require that bank holding companies maintain capital commensurate with both on and off balance sheet credit and other risks of their operations. Under the guidelines, a bank holding company must have a minimum ratio of total capital to risk-weighted assets ("Total Capital") of 8 percent. In addition to risk-based capital requirements, the FRB has also imposed leverage capital ratio requirements. The leverage ratio requirements establish a minimum required ratio of Tier I Capital to total assets less goodwill of 3 percent for bank holding companies having the highest regulatory rating. All other bank holding companies are required to maintain a minimum Tier I capital yielding a leverage ratio of 4 percent. The Bank is also subject to risk-weighted capital standards and leverage measures which are similar, but in some cases not identical, to the requirements applicable to bank hol ding companies. A presentation showing current regulatory capital levels of the Company and the Bank appears in Note Q to the Consolidated Financial Statements. At December 31, 2003, the Bank was classified as "well capitalized" under all applicable capital requirements.

Community Reinvestment Act

          Under the Community Reinvestment Act of 1977, as amended (the "CRA"), a financial institution is required to help meet the credit needs of its entire community, including low-income and moderate-income areas. The Bank's CRA rating is determined by evaluation of the Bank's lending, service and investment performance. The Federal banking agencies may take CRA compliance into account in an agency's review of applications for mergers, acquisitions, and to establish branches or facilities.

Monetary Policy and Economic Conditions

          The business of commercial banks, such as the Bank, is affected by monetary and fiscal policies of various regulatory agencies, including the FRB. Among the regulatory techniques available to the FRB are open market operations in United States Government securities, changing the discount rate for member bank borrowings, and imposing and changing the reserve requirement applicable to member bank deposits and to certain borrowings by member banks and their affiliates (including parent companies). These policies influence to a significant extent the overall growth and distribution of bank loans, investments and deposits and the interest rates charged on loans, as well as the interest rates paid on savings and time deposits.

          The monetary policies of the FRB have had a significant effect on the operating results of commercial banks in the past and are expected to continue to do so in the future. In view of constantly changing conditions in the national economy and the money market, as well as the effect of acts by the monetary and fiscal authorities, including the FRB, no definitive predictions can be made by the Company or the Bank as to future changes in interest rates, credit

Employees

          As of December 31, 2003, 141 persons were employed by the Bank; 127 were full time employees and 14 were part time employees.

Selected Statistical Information

          The following tables describe certain aspects of the Company's business in statistical form.

          The following are the average balance sheets for the years ending December 31: (Dollars in Thousands)

(Dollars in Thousands)

          The following table sets forth for the periods indicated a summary of changes in interest income and interest expense, based upon a tax equivalent basis, resulting from changes in volume and changes in rates:

Volume Variance - change in volume multiplied by the previous year's rate.

Rate Variance - change in rate multiplied by the previous year's volume.

Rate/Volume Variance - change in volume multiplied by the change in rate. This variance was allocated to volume variance and rate variance in proportion to the relationship of the absolute dollar amount of the change in each.

          Interest on non-taxable securities has been adjusted to a fully tax equivalent basis using a statutory tax rate of 34% in 2003, 2002 and 2001.

(Dollars in Thousands)

          The following table sets forth the fair value and amortized cost of securities at December 31:

          The following table sets forth the market value of debt securities by maturity (or anticipated call date, if earlier) and weighted average yield for each range of maturities at December 31, 2003: