Exhibit (h)(9)

                          Domini Social Investments LLC
                             536 Broadway, 7th Floor
                            New York, New York 10012

                                                              September 13, 2007

Domini Social Investment Trust
536 Broadway, 7th Floor
New York, New York 10012

     Re: Expense Limitation Agreement

Ladies and Gentlemen:

     Domini Social Investments LLC currently provides oversight and
administrative and management services to Domini Social Investment Trust (the
"Trust"), a Massachusetts business trust. We hereby agree with the Trust that we
will waive expenses payable to us by the Trust's series designated Domini
PacAsia Social Equity Fund (the "Fund") or will reimburse the Fund for all
expenses payable by the Fund to the extent necessary so that the Fund's
aggregate expenses (excluding brokerage fees and commissions, interest, taxes,
and other extraordinary expenses), net of waivers and reimbursements, would not
exceed, on a per annum basis, 1.60% of that Fund's average daily net assets.

     The agreement in this letter shall take effect on November 30, 2007, and
shall remain in effect until November 30, 2008, absent an earlier modification
by the Board of Trustees, which oversees the Fund.

     Please sign below to confirm your agreement with the terms of this letter.

                                        Sincerely,

                                        Domini Social Investments LLC


                                        By: /s/ Amy L. Thornton
                                            ------------------------------------
                                            Amy L. Thornton
                                            Chief Executive Officer

Agreed:
Domini Social Investment Trust


By: /s/ Carole M. Laible
    -------------------------------
    Carole M. Laible
    Treasurer