U.S. SECURITIES AND EXCHANGE COMMISSION
                             Washington, DC 20549

                                   FORM 24F-2
                       Annual Notice of Securities Sold
                            Pursuant to Rule 24f-2


            Read instructions at end of Form before preparing Form.
                             Please print or type.


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1. Name and address of issuer:
   Mutual Of America Investment Corporation
   320 Park Avenue
   New York, NY 10022

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2. Name of each series or class of securities for which this form is filed (if
   the Form is being filed for all series and classes of securities of the
   issuer, check the box but do not list series or classes):           [X]


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3. Investment Company Act File Number:  811-05084

   Securities Act File Number:          33-06486

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4(a). Last day of fiscal year for which this notice is filed:

   December 31, 2008

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4(b).[] Check box if this Form is being filed late (i.e., more than 90 calendar
        days after the end of the issuer's fiscal year). (See Instruction A.2)

Note: If the Form is being filed late, interest must be paid on the
Registration fee due.
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4(c).[] Check box if this is the last time the issuer will be filing this Form.
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5. Calculation of registration fee:

   (i)   Aggregate sale price of securities sold during the
         fiscal year pursuant to section 24(f):                  $ 446,036,475

   (ii)  Aggregate price of securities redeemed or
         repurchased during the fical year:                      $ 298,288,891
   (iii) Aggregate price of securities redeemed or
         repurchased during any prior fiscal year ending no
         earlier than October 11, 1995 that were not
         previously used to reduce registration fees payable
         to the Commission:                                      $
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   (iv)  Total available redemption credits [add Items 5(ii)
         and 5 (iii):                                            $ 298,288,891

   (v)   Net sales - if Item 5(i) is greater than Item 5(iv)
         [subtract Item 5(iv) from Item 5(i)]:                   $ 147,747,584
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   (vi)  Redemption credits available for use in future years
         - if Item 5(i) is less than Item 5(iv) [subtraction 5(iv)
         from Item 5(i)]:                                        $   "-0-"
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   (vii) Multiplier for determining registration fee
         (See Instruction C.9):                                 X.0000393

   (viii)Registration fee due [multiply Item
        5(v) by Item5(vii)]
        (enter"0"if no fee is due):                               =$ 5,806

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6. Prepaid Shares

   If the response to item 5(i) was determined by deducting an amount of
   securities that were registered under the Securiites Act of 1933 pursuant to
   Rule 24e-2 as in effect before [effective date of rescisison of rule 24e-2],
   then report the amount of securities (number of shares or other units)
   deducted here:________. If there is a number of shares or other units that
   were registered pursuant to rule 24e-2 remaining unsold at the end of the
   fiscal year for which this form is filed that are available for use by the
   issuer in future fiscal years, then state that number here:_______.

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7. Interest due - if this Form is being filed more than 90 days after the end
of the issuer's fiscal year (see Instruction D):                       -0-
                                                                  +$__________
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8. Total of the amount of the registration fee due plus any interest due [line
   5(viii) plus line 7]:
                                                                  =$ 5,806
                                                                    __________
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9. Date the registration fee and any interest payment was sent to the
   Commission's lockbox depository:    3/13/09

      Method of Delivery:

                      [x]  Wire Transfer

                      [ ]  Mail or other means
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                                  SIGNATURES

This report has been signed below by the following persons on behalf of the
issuer and in the capacities and on the dates indicated.

By (Signature and Title)* Signature on file with original
                          ----------------------------------------------------

      John Greed,Senior Executive Vice President and Chief Financial Officer
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Date 3/13/09
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 *Please print the name and title of the signing officer below the signature.