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<DIV style="font-size: 10pt; margin-top: 12pt"><B>As filed with the Securities and Exchange Commission on June&nbsp;2, 2008</B></DIV>

<DIV align="right" style="font-size: 10pt; margin-top: 0pt; margin-bottom:6pt"><B>Registration No.&nbsp;333-<u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</u></B></DIV>

<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 1pt solid black; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="font-size: 14pt; margin-top: 12pt"><B>SECURITIES AND EXCHANGE COMMISSION</B></DIV>

<DIV align="center" style="font-size: 12pt"><B>Washington, D.C. 20549</B></DIV>

<DIV align="center" style="font-size: 12pt"><B><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></B></DIV>

<DIV align="center" style="font-size: 18pt; margin-top: 12pt"><B>FORM S-8</B></DIV>

<DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B>REGISTRATION STATEMENT<BR>
UNDER THE SECURITIES ACT OF 1933</B><BR>
<DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>

<DIV align="center" style="font-size: 24pt; margin-top: 12pt"><B>ISABELLA BANK CORPORATION</B></DIV>

<DIV align="center" style="font-size: 10pt">(Exact name of Issuer as specified in its charter)</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
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    <TD width="47%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="47%">&nbsp;</TD>
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<TR valign="bottom">
    <TD align="center" valign="top"><B>Michigan</B><BR>
(State or other jurisdiction of <BR>
incorporation or organization)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>38-2830092</B><BR>
(I.R.S. Employer<BR>
Identification No.)</TD>
</TR>
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</TABLE></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>200 East Broadway<BR>
Mt. Pleasant, Michigan 48858</B><BR>
(Address of Principal Executive Offices)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>ISABELLA BANK CORPORATION<BR>
STOCKHOLDER DIVIDEND REINVESTMENT AND<BR>
EMPLOYEE STOCK PURCHASE PLAN</B><BR>
(Full title of the plan)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>Dennis P. Angner<BR>
200 East Broadway<BR>
Mt. Pleasant, MI 48858<BR>
989/772-9471</B><BR>
(Name, address and telephone number of agent for service)</DIV>

<DIV style="font-size: 10pt; margin-top: 6pt">Indicate by checkmark whether the registrant is a large accelerated filer, an accelerated filer, a
non-accelerated filer, or a smaller reporting company. See the definitions of &#147;large accelerated
filer,&#148; &#147;accelerated filer,&#148; and &#147;smaller reporting company&#148; in Rule&nbsp;12b-2 of the Exchange Act
(check one):</DIV>


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    <TD width="3%">&nbsp;</TD>
    <TD width="22%">&nbsp;</TD>
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<TR valign="bottom">
    <TD align="center" valign="top" nowrap>Large accelerated filer
<FONT face="Wingdings">&#111;</FONT></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top" nowrap>Accelerated filer
<FONT face="Wingdings">&#254;</FONT></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top" nowrap>Non-accelerated filer <FONT face="Wingdings">&#111;</FONT></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top" nowrap>Smaller reporting company <FONT face="Wingdings">&#111;</FONT></TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top" nowrap>(Do not check if a smaller reporting company)</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
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</TABLE></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>CALCULATION OF REGISTRATION FEE</B></DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
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    <TD width="2%">&nbsp;</TD>
    <TD width="11%">&nbsp;</TD>

    <TD width="1%">&nbsp;</TD>
</TR><TR style="font-size: 1px" valign="bottom">
    <TD nowrap colspan="15" style="border-bottom: 3px double #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center"><B>Title of Securities</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>Amount to be</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>Proposed Maximum</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>Proposed Maximum</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>Amount of</B></TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center"><B>to be Registered</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>Registered</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>Offering Price Per Share</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>Aggregate Offering Price</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>Registration Fee</B></TD>
    <TD width="1%">&nbsp;</TD>
</TR>

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    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
<TD valign="top" style="border-top: 2px solid #000000"><B>Common Shares, no par value</B></TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="center" valign="bottom" style="border-top: 2px solid #000000"><B>30,000 Sh </B><SUP style="font-size: 85%; vertical-align: text-top"><B>(1)</B></SUP>
</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="center" valign="bottom" style="border-top: 2px solid #000000"><B>$44.00</B><SUP style="font-size: 85%; vertical-align: text-top"><B>(2)</B></SUP>
</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="center" valign="bottom" style="border-top: 2px solid #000000"><B>$ 1,320,000 </B><SUP style="font-size: 85%; vertical-align: text-top"><B>(2)</B></SUP>
</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="center" valign="bottom" style="border-top: 2px solid #000000"><B>$ 51.88 </B><SUP style="font-size: 85%; vertical-align: text-top"><B>(2)</B></SUP></TD>
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 1px" valign="bottom">
    <TD nowrap colspan="15" style="border-top: 3px double #000000">&nbsp;</TD>
</TR>

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</TABLE></DIV>
<DIV style="font-size: 10pt; margin-top: 6pt"><SUP style="font-size: 85%; vertical-align: text-top"><B>(1)</b></SUP><b> Pursuant to Rule&nbsp;416 under the Securities Act of 1933, this registration statement
also covers such indeterminate number of additional shares as may be required to be issued under
the Plan in the event of an adjustment as a result of an increase in the number of issued shares of
Common Stock resulting from a subdivision of such shares, the payment of stock dividends or certain
other capital adjustments.</B></DIV>

<DIV style="font-size: 10pt; margin-top: 6pt"><SUP style="font-size: 85%; vertical-align: text-top"><B>(2) </b></SUP><b> Estimated based on the average price of the Common Stock on May&nbsp;27, 2008, pursuant
to Rule&nbsp;457(h)(1) and 457(c) solely for the purpose of calculating the registration fee.</B></DIV>


<DIV style="font-size: 10pt; margin-top: 12pt"><B>REGISTRATION OF ADDITIONAL SECURITIES STATEMENT PURSUANT TO GENERAL INSTRUCTION E OF FORM S-8</B></DIV>

<DIV style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This Registration Statement on Form S-8 is being filed for the purpose of registering an
additional 30,000 shares of Isabella Bank Corporation (the &#147;Registrant&#148;) common stock to be issued
pursuant to the Isabella Bank Corporation Stockholder Dividend Reinvestment and Employee Stock
Purchase Plan, as amended on May&nbsp;22, 2008 (the &#147;Plan&#148;). Pursuant to General Instruction E of Form
S-8, the contents of the Registration Statements on Form S-8, previously filed with the Commission
relating to the Plan (File No.&nbsp;33-34777, File No.&nbsp;33-61596, File No.&nbsp;333-53377 and File No.
333-106414), are incorporated herein by reference.</DIV>

<DIV style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;As originally adopted, the Plan was titled &#147;IBT Bancorp, Inc. Stockholder Dividend
Reinvestment and Employee Stock Purchase Plan.&#148; On May&nbsp;22, 2008, the Board of Directors of the
Registrant approved an amendment to the Plan to reflect the change of the name of the Registrant
from &#147;IBT Bancorp, Inc.&#148; to &#147;Isabella Bank Corporation&#148; (the &#147;Amendment&#148;). The Amendment changed
the title of the Plan to &#147;Isabella Bank Corporation Stockholder Dividend Reinvestment and Employee
Stock Purchase Plan&#148; and updated references to the Registrant&#146;s previous name.</DIV>

<DIV style="width: 100%; border-bottom: 1pt solid black; margin-top: 10pt; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>

<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio --></DIV>

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<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>PART II</B></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</B></DIV>
<!-- link1 "Item 8 Exhibits" -->
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
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<TR valign="bottom">
    <TD width="5%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="98%">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD nowrap style="border-bottom: 0px solid #000000">Item 8.</TD>
    <TD>&nbsp;</TD>
    <TD nowrap><DIV style="border-bottom: 1px solid #000000; width:5%">Exhibits</DIV></TD>
</TR>

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<TR valign="bottom">
    <TD valign="top"><br></TD>
    <TD>&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD colspan="3" valign="top">The following is a list of exhibits filed as part of this registration statement.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top">5.</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Opinion of counsel as to the legality of the common shares covered by this registration
statement.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top">23.1</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Consent of Rehmann Robson P.C.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top">23.2</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Consent of counsel (included within Exhibit&nbsp;5).</TD>
</TR>
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</TABLE></DIV>
<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio --></DIV>

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<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>SIGNATURES</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Registrant. Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the requirements for
filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by
the undersigned, thereunto duly authorized, in the City of Mt. Pleasant, state of Michigan, on May
22, 2008.
</DIV>


<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="40%">&nbsp;</TD>
    <TD width="10%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">ISABELLA BANK CORPORATION<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/ Dennis P. Angner&nbsp;&nbsp;
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap colspan="2" align="left">Dennis P. Angner, President and Chief Executive Officer</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
</TABLE>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has
been signed below by the following persons in the capacities and on the dates indicated.
</DIV>
<DIV align="center">
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<TR valign="bottom">
    <TD width="40%">&nbsp;</TD>
    <TD width="10%">&nbsp;</TD>
    <TD width="50%">&nbsp;</TD>
</TR>
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<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Dennis P. Angner
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">May&nbsp;22, 2008</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Dennis P. Angner, President, Chief Executive
Officer (Principal Executive Officer) and
Director
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Peggy L. Wheeler
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Peggy L. Wheeler<br>
Senior Vice President and Controller<br>
(Principal Financial Officer)
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">May&nbsp;22, 2008&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Richard J. Barz
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Richard J. Barz, Director
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">May&nbsp;22, 2008&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Sandra L. Caul
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Sandra L. Caul, Director
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">May&nbsp;22, 2008&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ James C. Fabiano
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
James C. Fabiano, Director
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">May&nbsp;22, 2008&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Theodore W. Kortes
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Theodore W. Kortes, Director
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">May&nbsp;22, 2008&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ David J. Maness
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
David J. Maness, Director
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">May&nbsp;22, 2008&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ W. Joseph Manifold
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">May&nbsp;22, 2008&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">W. Joseph Manifold, Director</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ W. Michael McGuire
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">May&nbsp;22, 2008</TD>
</TR>
<TR valign="bottom" style="font-size:1pt">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">W. Michael McGuire, Director</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ William J. Strickler
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">May&nbsp;22, 2008</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
William J. Strickler, Director
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Dale Weburg
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">May&nbsp;22, 2008</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Dale Weburg, Director
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
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</DIV>

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<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">
<!-- link1 "EXHIBIT INDEX" -->

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><U>EXHIBIT INDEX</U>
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="2%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="87%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left">Exhibit</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">Number</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">Description</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><br></DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">5
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of counsel as to legality of the
common shares covered by this registration statement</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Rehmann Robson P.C.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of counsel (included within Exhibit&nbsp;5)</TD>
</TR>
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[{"type": "S-8", "sequence": "1", "filename": "k27133sv8.htm", "description": "REGISTRATION STATEMENT", "secsgml_size_bytes": 25195}]
{"company-data": {"conformed-name": "ISABELLA BANK CORP", "cik": "0000842517", "assigned-sic": "6022", "irs-number": "382830092", "state-of-incorporation": "MI", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-151353", "film-number": "08874363"}, "business-address": {"street1": "200 EAST BROADWAY", "city": "MT PLEASANT", "state": "MI", "zip": "48858", "phone": "5177729471"}, "mail-address": {"street1": "200 EAST BROADWAY", "city": "MT PLEASANT", "state": "MI", "zip": "48858"}, "former-company": {"former-conformed-name": "IBT BANCORP INC /MI/", "date-changed": "19920703"}}
sv8
As filed with the Securities and Exchange Commission on June 2, 2008
Registration No. 333-
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM S-8
REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933
ISABELLA BANK CORPORATION
(Exact name of Issuer as specified in its charter)
Michigan
(State or other jurisdiction of
incorporation or organization)
38-2830092
(I.R.S. Employer
Identification No.)
200 East Broadway
Mt. Pleasant, Michigan 48858
(Address of Principal Executive Offices)
ISABELLA BANK CORPORATION
STOCKHOLDER DIVIDEND REINVESTMENT AND
EMPLOYEE STOCK PURCHASE PLAN
(Full title of the plan)
Dennis P. Angner
200 East Broadway
Mt. Pleasant, MI 48858
989/772-9471
(Name, address and telephone number of agent for service)
Indicate by checkmark whether the registrant is a large accelerated filer, an accelerated filer, a
non-accelerated filer, or a smaller reporting company. See the definitions of "large accelerated
filer," "accelerated filer," and "smaller reporting company" in Rule 12b-2 of the Exchange Act
(check one):
Large accelerated filer
o
Accelerated filer
þ
Non-accelerated filer
o
Smaller reporting company
o
(Do not check if a smaller reporting company)
CALCULATION OF REGISTRATION FEE
Title of Securities
Amount to be
Proposed Maximum
Proposed Maximum
Amount of
to be Registered
Registered
Offering Price Per Share
Aggregate Offering Price
Registration Fee
Common Shares, no par value
30,000 Sh
(1)
$44.00
(2)
$ 1,320,000
(2)
$ 51.88
(2)
(1)
Pursuant to Rule 416 under the Securities Act of 1933, this registration statement
also covers such indeterminate number of additional shares as may be required to be issued under
the Plan in the event of an adjustment as a result of an increase in the number of issued shares of
Common Stock resulting from a subdivision of such shares, the payment of stock dividends or certain
other capital adjustments.
(2)
Estimated based on the average price of the Common Stock on May 27, 2008, pursuant
to Rule 457(h)(1) and 457(c) solely for the purpose of calculating the registration fee.
REGISTRATION OF ADDITIONAL SECURITIES STATEMENT PURSUANT TO GENERAL INSTRUCTION E OF FORM S-8
This Registration Statement on Form S-8 is being filed for the purpose of registering an
additional 30,000 shares of Isabella Bank Corporation (the "Registrant") common stock to be issued
pursuant to the Isabella Bank Corporation Stockholder Dividend Reinvestment and Employee Stock
Purchase Plan, as amended on May 22, 2008 (the "Plan"). Pursuant to General Instruction E of Form
S-8, the contents of the Registration Statements on Form S-8, previously filed with the Commission
relating to the Plan (File No. 33-34777, File No. 33-61596, File No. 333-53377 and File No.
333-106414), are incorporated herein by reference.
As originally adopted, the Plan was titled "IBT Bancorp, Inc. Stockholder Dividend
Reinvestment and Employee Stock Purchase Plan." On May 22, 2008, the Board of Directors of the
Registrant approved an amendment to the Plan to reflect the change of the name of the Registrant
from "IBT Bancorp, Inc." to "Isabella Bank Corporation" (the "Amendment"). The Amendment changed
the title of the Plan to "Isabella Bank Corporation Stockholder Dividend Reinvestment and Employee
Stock Purchase Plan" and updated references to the Registrant's previous name.
PART II
INFORMATION REQUIRED IN THE REGISTRATION STATEMENT
Item 8.
Exhibits
The following is a list of exhibits filed as part of this registration statement.
5.
Opinion of counsel as to the legality of the common shares covered by this registration
statement.
23.1
Consent of Rehmann Robson P.C.
23.2
Consent of counsel (included within Exhibit 5).
SIGNATURES
The Registrant. Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the requirements for
filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by
the undersigned, thereunto duly authorized, in the City of Mt. Pleasant, state of Michigan, on May
22, 2008.
ISABELLA BANK CORPORATION
By:
/s/ Dennis P. Angner
Dennis P. Angner, President and Chief Executive Officer
Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has
been signed below by the following persons in the capacities and on the dates indicated.
/s/ Dennis P. Angner
May 22, 2008
Dennis P. Angner, President, Chief Executive
Officer (Principal Executive Officer) and
Director
/s/ Peggy L. Wheeler
Peggy L. Wheeler
Senior Vice President and Controller
(Principal Financial Officer)
May 22, 2008
/s/ Richard J. Barz
Richard J. Barz, Director
May 22, 2008
/s/ Sandra L. Caul
Sandra L. Caul, Director
May 22, 2008
/s/ James C. Fabiano
James C. Fabiano, Director
May 22, 2008
/s/ Theodore W. Kortes
Theodore W. Kortes, Director
May 22, 2008
/s/ David J. Maness
David J. Maness, Director
May 22, 2008
/s/ W. Joseph Manifold
May 22, 2008
W. Joseph Manifold, Director
/s/ W. Michael McGuire
May 22, 2008
W. Michael McGuire, Director
/s/ William J. Strickler
May 22, 2008
William J. Strickler, Director
/s/ Dale Weburg
May 22, 2008
Dale Weburg, Director
EXHIBIT INDEX
Exhibit
Number
Description
5
Opinion of counsel as to legality of the
common shares covered by this registration statement
23.1
Consent of Rehmann Robson P.C.
23.2
Consent of counsel (included within Exhibit 5)