UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Item 1.

Security and Issuer

This Amendment No. 6 to Schedule 13D (“Amendment No. 6”) relates to the Common Stock, par value $0.01 per share (the “Common Stock”), of Tier Technologies, Inc., a Delaware corporation (the “Company”), which has its principal executive offices at 10780 Parkridge Boulevard, Suite 400, Reston Virginia 20191.  This Amendment No. 6 amends and supplements, as set forth below, the information contained in items 1, 3, 4, 5 and 6 of the Schedule 13D filed by the Reporting Persons with respect to the Company on May 12, 2008, as amended by Amendment No. 1 thereto filed by the Reporting Persons on August 20, 2008, Amendment No. 2 thereto filed by the Reporting Persons on September 9, 2008, Amendment No. 3 thereto filed by the Reporting Persons on October 20, 2008, Amendment No. 4 thereto filed by the Reporting Persons on November 17, 2008 and Amendment No. 5 thereto filed by the Reporting Persons on December 4, 2008 (as so amended, the “Schedule 13D”).  All capitalized terms used herein but not defined herein have the meanings set forth in the Schedule 13D.  Except as amended by this Amendment No. 6, all information contained in the Schedule 13D is, after reasonable inquiry and to the best of the Reporting Persons’ knowledge and belief, true, complete and correct as of the date of this Amendment No. 6.

Item 3.

Source and Amount of Funds or Other Consideration

Item 3 of the Schedule 13D is hereby amended to read in its entirety as follows:

The total purchase price for the 2,459,404 shares of Common Stock beneficially owned by Discovery Group and Messrs. Donoghue and Murphy as of March 11, 2009 was approximately $18,981,855, and the total purchase price for the 2,109,667 shares of Common Stock beneficially owned by Discovery Equity Partners was approximately $16,308,226.  The source of such funds was the assets of Discovery Equity Partners and another private investment partnership (collectively, the “Partnerships”) over which Discovery Group exercises discretionary investment management authority, including proceeds of margin loans under margin loan facilities maintained in the ordinary course of business by the Partnerships with a broker on customary terms and conditions.  The Partnerships are the legal owner of all of the Common Stock beneficially owned by Discovery Group and Messrs. Donoghue and Murphy.

Item 4.

Purpose of Transaction

Item 4 of the Schedule 13D is hereby amended by adding the following as the ninth and tenth paragraphs thereof:

In accordance with such notice, the Reporting Persons solicited proxies for the election of Messrs. Donoghue and Murphy at the Company’s 2009 Annual Meeting of Stockholders which was held on March 11, 2009.  Based on an estimate provided by Discovery Equity Partners’ proxy solicitor, the Reporting Persons believe that the stockholders of the Company have elected Messrs, Donoghue and Murphy to the Company’s Board of Directors.  Certification of the final results of the election by the independent inspector of elections, IVS Associates, is expected to be completed in March 2009.

Messrs. Donoghue and Murphy have stated that, if so elected to the Board of Directors of the Company, they intend to seek to address what they believe should be four principal objectives for the Company:  (i) the reduction of the Company’s corporate overhead; (ii) the return of any excess cash of the Company to its stockholders; (iii) the elimination of unnecessary takeover defenses of

the Company; and (iv) the exploration of strategic alternatives available to the Company intended to maximize the value of the Company to its stockholders.  Messrs. Donoghue and Murphy intend to develop and present to the Board of Directors specific plans and proposals intended to effectuate such objectives.  They also reserve to right to develop and present other plans and proposals that they believe to be in the best interests of the Company’s stockholders.

Item 5.

Interest in Securities of the Issuer

Item 5 of the Schedule 13D is hereby amended to read in its entirety as follows:

The information concerning percentages of ownership set forth below is based on 19,734,863 shares of Common Stock reported outstanding as of January 16, 2009 in the Company’s Proxy Statement on Schedule 14A, filed on February 10, 2009.

Discovery Equity Partners beneficially owns 2,109,667 shares of Common Stock as of March 11, 2009, which represents 10.7% of the outstanding Common Stock.

Discovery Group beneficially owns 2,459,404 shares of Common Stock as of March 11, 2009, which represents 12.5% of the outstanding Common Stock.

Mr. Donoghue beneficially owns 2,459,404 shares of Common Stock as of March 11, 2009, which represents 12.5% of the outstanding Common Stock.

Mr. Murphy beneficially owns 2,459,404 shares of Common Stock as of March 11, 2009, which represents 12.5% of the outstanding Common Stock.

Discovery Group is the sole general partner of Discovery Equity Partners and has sole discretionary investment authority with respect to the other Partnership’s investment in the Common Stock.  Messrs. Donoghue and Murphy are the sole managing members of Discovery Group.  As a consequence, Discovery Group and Messrs. Donoghue and Murphy may be deemed to share beneficial ownership of all of the shares of Common Stock owned by both of the Partnerships, while Discovery Equity Partners shares beneficial ownership with Discovery Group and Messrs. Donoghue and Murphy of only the shares of Common Stock owned by it.

The transactions in Common Stock effected by the Reporting Persons during the past 60 days are set out in Exhibit 1 hereto.

No person other than the Partnerships is known to any Reporting Person to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, any of the shares of Common Stock reported herein. 

Item 6.

Contracts, Arrangements, Understandings or Relationships with Respect to Securities of the Issuer

Item 6 of the Schedule 13D is hereby amended to read in its entirety as follows:

There are no contracts, arrangements, understandings or relationships (legal or otherwise) between or among any of the Reporting Persons and any other person with respect to any securities of the Company other than the governing documents of Discovery Group and the Partnerships, the margin loan facilities referred to under Item 3 above, the Joint Filing Agreements of the Reporting Persons with respect to the Schedule 13D that were included as exhibits thereto, the Joint Filing Agreement of the Reporting Persons with respect to this Amendment No. 6 included as Exhibit 2 to this Amendment No. 6, and the Powers of Attorney granted by Messrs Donoghue and Murphy

with respect to reports under Section 13 of the Securities Exchange Act of 1934, as amended, which Powers of Attorney are included as Exhibit 3 and Exhibit 4, respectively, to this Amendment No. 6.

Item 7.

Material to Be Filed as Exhibits

Exhibit 1:                List of transactions by Reporting Persons in the Company’s Common Stock during the past 60 days.

Exhibit 2:                Joint Filing Agreement dated as of March 12, 2009, by and among Discovery Equity Partners; Discovery Group; Daniel J. Donoghue; and Michael R. Murphy.

Exhibit 3:                Power of Attorney of Daniel J. Donoghue, dated as of April 28, 2008.

Exhibit 4:                Power of Attorney of Michael R. Murphy, dated as of April 28, 2008.

March 12, 2009

Date

DISCOVERY GROUP I, LLC,

for itself and as general partner of

DISCOVERY EQUITY PARTNERS, L.P.

By:  Michael R. Murphy*

Signature

Michael R. Murphy, Managing Member

Name/Title

Daniel J. Donoghue*

Signature

Daniel J. Donoghue

Name/Title

Michael R. Murphy*

Signature

Michael R. Murphy

Name/Title

*By: /s/ Mark Buckley

Mark Buckley

Attorney-in-Fact for Daniel J. Donoghue

Attorney-in-Fact for Michael R. Murphy

Exhibit 1:

List of transactions by Reporting Persons in the Company’s Common Stock during the past 60 days.

Exhibit 2:

Joint Filing Agreement dated as of March 12, 2009, by and among Discovery Equity Partners; Discovery Group; Daniel J. Donoghue; and Michael R. Murphy.

Exhibit 3:

Power of Attorney of Daniel J. Donoghue, dated as of April 28, 2008.

Exhibit 4:

Power of Attorney of Michael R. Murphy, dated as of April 28, 2008.