POWER OF ATTORNEY

     I, the undersigned Trustee of Pioneer Ibbotson Asset Allocation Series (the
"Trust"), hereby constitute and appoint Christopher J. Kelley, Daniel K.
Kingsbury and Mark E. Bradley, and each of them acting singly, to be my true,
sufficient and lawful attorneys, with full power to each of them to sign for me,
in my name: (i) the Trust's Registration Statement on Form N-14, and any and all
amendments thereto, with respect to the proposed reorganization of Pioneer
Ibbotson Aggressive Allocation Fund into Pioneer Ibbotson Growth Allocation
Fund, a series of the Trust, and (ii) any and all other documents and papers
relating to such reorganization, and generally to do all such things in my name
and on behalf of me in the capacities indicated to enable the Trust to comply
with the Investment Company Act of 1940, as amended, and the Securities Act of
1933, as amended, and thereunder, hereby ratifying and confirming my signature
as it may be signed by said attorneys or each of them to the Registration
Statement and amendments to said Registration Statement.

     IN WITNESS WHEREOF, I have hereunder set my hand on this 15th day of July,
2014.


/s/ David R. Bock                                       /s/ Thomas J. Perna
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David R. Bock                                           Thomas J. Perna


/s/ Benjamin M. Friedman                                /s/ Marguerite A. Piret
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Benjamin M. Friedman                                    Marguerite A. Piret


/s/ Margaret B.W. Graham                                /s/ Kenneth J. Taubes
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Margaret B.W. Graham                                    Kenneth J. Taubes


/s/ Daniel K. Kingsbury
-----------------------
Daniel K. Kingsbury