November 9, 2012

Securities and Exchange Commission
100 F Street, N.E.
Washington, DC 20549-4720

Re:
American Century Asset Allocation Portfolios, Inc. (the "Registrant")
 
1933 Act File No. 333-116351
 
1940 Act File No. 811-21591

Ladies and Gentlemen:

Pursuant to Rule 497(e) under the Securities Act of 1933, the aforementioned Registrant hereby submits for filing interactive data relating to the supplement filed with the Securities and Exchange Commission on October 31, 2012, under Rule 497(e) (Accession No. 0001437749-12-010727) to the One Choice Portfolio: Very Conservative prospectus dated December 1, 2011.

The purpose of this filing is to submit an XBRL interactive data file in the manner provided by Rule 405 of Regulation S-T, General Instruction C.3.(g) of Form N-1A, and Rule 497(e).

If there are any questions or comments regarding this filing, please contact the undersigned at (816) 340-3226.

Sincerely,


/s/ Kathleen Gunja Nelson                               
Kathleen Gunja Nelson
Assistant Secretary

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
American Century Investments
 
P.O. Box 410141, 4500 Main Street
1-800-345-2021 or 816-531-5575
Kansas City, MO 64141-0141
www.americancentury.com
 
 
 
 
 
One Choice Portfolio: Very Conservative


November 9, 2012



EXPLANATORY NOTE

On behalf of One Choice Portfolio: Very Conservative, a series of American Century Asset Allocation Portfolios, Inc. (the “Corporation”), and pursuant to Rule 497(e) under the Securities Act of 1933, as amended (the “Securities Act”), the purpose of this filing is to submit an interactive data file in the manner provided by Rule 405 of Regulation S-T and General Instruction C.3.(g) of Form N-1A. The interactive data file included as an exhibit to this filing relates to the prospectus supplement filed with the Securities and Exchange Commission on behalf of the Corporation pursuant to Rule 497(e) under the Securities Act on October 31, 2012; such filing (Accession Number 0001437749-12-010727) is incorporated by reference into this Rule 497 Document.


EXHIBIT INDEX

EXHIBIT NUMBER                                                                             DESCRIPTION OF DOCUMENT
Exhibit – 101.INS
XBRL Instance Document
Exhibit – 101.SCH
XBRL Taxonomy Extension Schema Document
Exhibit – 101.DEF
XBRL Taxonomy Extension Definition Linkbase Document
Exhibit – 101.LAB
XBRL Taxonomy Extension Label Linkbase Document
Exhibit – 101.PRE
XBRL Taxonomy Extension Presentation Linkbase Document