CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the references to our firm under the captions "Financial
Highlights" and "Auditors" in the Combined Information Statement of Pioneer
Ibbotson Aggressive Allocation Fund and Prospectus For Pioneer Ibbotson Growth
Allocation Fund (both a series of Pioneer Ibbotson Asset Allocation Series). We
further consent to the reference to us under the heading "Representations and
Warranties" (paragraphs 4.1(f) and 4.2(g)) in the Agreement and Plan of
Reorganization included as Exhibit A to the Combined Information Statement and
Prospectus included in this Registration Statement as filed with the Securities
and Exchange Commission on Form N-14 of Pioneer Ibbotson Asset Allocation
Series.

We also consent to the references to our firm under the captions "Independent
Registered Public Accounting Firm" and "Financial Statements" in the Statements
of Additional Information on Form N-1A for the following funds which are also
incorporated by reference into this Registration Statement on Form N-14 of the
Pioneer Ibbotson Asset Allocation Series:

Pioneer Ibbotson Aggressive Allocation Fund, which was filed with the Securities
and Exchange Commission on November 26, 2013 in Post-Effective Amendment No. 18
(File Nos. 333-114788; 811-21569).

Pioneer Ibbotson Growth Allocation Fund, which was filed with the Securities and
Exchange Commission on November 26, 2013 in Post-Effective Amendment No. 18
(File Nos. 333-114788; 811-21569).

We further consent to the incorporation by reference of our reports on each of
the financial statements and financial highlights for Pioneer Ibbotson
Aggressive Allocation Fund and Pioneer Ibbotson Growth Allocation Fund as of
July 31, 2013, dated September 24, 2013, which are also incorporated by
reference into this Registration Statement as filed with the Securities and
Exchange Commission on Form N-14 of Pioneer Ibbotson Asset Allocation Series.

                                                           /s/ ERNST & YOUNG LLP

Boston, Massachusetts
September 5, 2014