CDC Nvest Cash Management Trust
                            Exhibit to SEC Form N-CSR
                           Section 302 Certifications

I, Nicholas H. Palmerino, certify that:

      1.  I have reviewed this report on Form N-CSR of CDC Nvest Cash Management
          Trust;

      2.  Based on my knowledge, this report does not contain any untrue
          statement of a material fact or omit to state a material fact
          necessary to make the statements made, in light of the circumstances
          under which such statements were made, not misleading with respect to
          the period covered by this report; and

      3.  Based on my knowledge, the financial statements, and other financial
          information included in this report, fairly present in all materials
          respects the financial condition, results of operations, changes in
          net assets, and cash flows (if the financial statements are required
          to include a statement of cash flows), of the registrant as of, and
          for, the periods presented in this report;

      4.  The registrant's other certifying officers and I are responsible for
          establishing and maintaining disclosure controls and procedures (as
          defined in Rule 30a-2(c) under the Investment Company Act of 1940) for
          the registrant and have:

             a. Designed such disclosure controls and procedures to ensure that
                material information relating to the registrant, including its
                consolidated subsidiaries, is made know to us by others within
                those entities, particularly during the period in which this
                report is being prepared;

             b. Evaluated the effectiveness of the registrant's disclosure
                controls and procedures as of a date within 90 days prior to the
                filing of this report (the "Evaluation Date"); and

             c. Presented in this report our conclusions about the effectiveness
                of the disclosure controls and procedures based on our
                evaluation as of the Evaluation Date;

      5.  The registrant's other certifying officers and I have disclosed, based
          on our most recent evaluation, to the registrant's auditors and the
          audit committee of the registrant's board of directors (or persons
          performing the equivalent functions):

             a. All significant deficiencies in the design or operation of
                internal controls which could adversely affect the registrant's
                ability to record, process, summarize and report financial data
                and have identified for the registrant's auditors any material
                weaknesses in internal controls; and

             b. Any fraud, whether or not material, that involves management or
                other employees who have a significant role in the registrant's
                internal controls; and

6.       The registrant's other certifying officers and I have indicated in this
         report whether or not there were significant changes in internal
         controls or in other factors that could significantly affect internal
         controls subsequent to the date of our most recent evaluation,
         including any corrective actions with regard to the significant
         deficiencies and material weaknesses.

Date:    February 25, 2004

                                   /s/ NICHOLAS H. PALMERINO
                                   -------------------------
                                   Nicholas H. Palmerino
                                   Treasurer



                         CDC Nvest Cash Management Trust
                            Exhibit to SEC Form N-CSR
                           Section 302 Certifications

I, John T. Hailer, certify that:

   1.  I have reviewed this report on Form N-CSR of CDC Nvest Cash Management
       Trust;

   2.  Based on my knowledge, this report does not contain any untrue statement
       of a material fact or omit to state a material fact necessary to make the
       statements made, in light of the circumstances under which such
       statements were made, not misleading with respect to the period covered
       by this report; and

   3.  Based on my knowledge, the financial statements, and other financial
       information included in this report, fairly present in all materials
       respects the financial condition, results of operations, changes in net
       assets, and cash flows (if the financial statements are required to
       include a statement of cash flows), of the registrant as of, and for, the
       periods presented in this report;

   4.  The registrant's other certifying officers and I are responsible for
       establishing and maintaining disclosure controls and procedures (as
       defined in Rule 30a-2(c) under the Investment Company Act of 1940) for
       the registrant and have:

         a. Designed such disclosure controls and procedures to ensure that
            material information relating to the registrant, including its
            consolidated subsidiaries, is made know to us by others within those
            entities, particularly during the period in which this report is
            being prepared;

         b. Evaluated the effectiveness of the registrant's disclosure controls
            and procedures as of a date within 90 days prior to the filing of
            this report (the "Evaluation Date"); and

         c. Presented in this report our conclusions about the effectiveness of
            the disclosure controls and procedures based on our evaluation as of
            the Evaluation Date;

   5.  The registrant's other certifying officers and I have disclosed, based on
       our most recent evaluation, to the registrant's auditors and the audit
       committee of the registrant's board of directors (or persons performing
       the equivalent functions):

         a. All significant deficiencies in the design or operation of internal
            controls which could adversely affect the registrant's ability to
            record, process, summarize and report financial data and have
            identified for the registrant's auditors any material weaknesses in
            internal controls; and

         b. Any fraud, whether or not material, that involves management or
            other employees who have a significant role in the registrant's
            internal controls; and

   6.  The registrant's other certifying officers and I have indicated in this
       report whether or not there were significant changes in internal controls
       or in other factors that could significantly affect internal controls
       subsequent to the date of our most recent evaluation, including any
       corrective actions with regard to the significant deficiencies and
       material weaknesses.

Date:  February 25, 2004

                                            /s/JOHN T. HAILER
                                            ------------------------------------
                                            John T. Hailer
                                            President & Chief Executive Officer