SC 13D/A

UNITED STATES

SECURITIES AND EXCHANGE

COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 13)*

Tier Technologies, Inc.

(Name of Issuer)

Common Stock, $0.01 par value per share

(Title of Class of Securities)

88650Q100

(CUSIP Number)

Michael R. Murphy

Discovery Group I, LLC

191 North Wacker Drive

Suite 1685

Chicago, Illinois 60606

Telephone Number: (312) 265-9600

(Name, Address and Telephone Number of Person

Authorized to Receive Notices and Communications)

April 25, 2011

(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. o

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See §240.13d-7 for other parties to whom copies are to be sent.

*The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP No.  88650Q100
	1.	Names of Reporting Persons. Discovery Equity Partners, L.P.
	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)			o
		(b)			o
	3.	SEC Use Only
	4.	Source of Funds (See Instructions) WC
	5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)     o
	6.	Citizenship or Place of Organization Illinois
Number of Shares Beneficially Owned by Each Reporting Person With			7.	Sole Voting Power None.
			8.	Shared Voting Power 2,109,667
			9.	Sole Dispositive Power None.
			10.	Shared Dispositive Power 2,109,667
	11.	Aggregate Amount Beneficially Owned by Each Reporting Person 2,109,667
	12.	Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)   o
	13.	Percent of Class Represented by Amount in Row (11) 12.7%
	14.	Type of Reporting Person (See Instructions) PN

CUSIP No.  88650Q100
	1.	Names of Reporting Persons. Discovery Group I, LLC
	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)			o
		(b)			o
	3.	SEC Use Only
	4.	Source of Funds (See Instructions) AF
	5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)     o
	6.	Citizenship or Place of Organization Delaware
Number of Shares Beneficially Owned by Each Reporting Person With			7.	Sole Voting Power None.
			8.	Shared Voting Power 2,459,404
			9.	Sole Dispositive Power None.
			10.	Shared Dispositive Power 2,459,404
	11.	Aggregate Amount Beneficially Owned by Each Reporting Person 2,459,404
	12.	Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)   o
	13.	Percent of Class Represented by Amount in Row (11) 14.8%
	14.	Type of Reporting Person (See Instructions) OO

CUSIP No.  88650Q100
	1.	Names of Reporting Persons. Daniel J. Donoghue
	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)			o
		(b)			o
	3.	SEC Use Only
	4.	Source of Funds (See Instructions) AF
	5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)     o
	6.	Citizenship or Place of Organization United States of America
Number of Shares Beneficially Owned by Each Reporting Person With			7.	Sole Voting Power None.
			8.	Shared Voting Power 2,459,404
			9.	Sole Dispositive Power None.
			10.	Shared Dispositive Power 2,459,404
	11.	Aggregate Amount Beneficially Owned by Each Reporting Person 2,459,404
	12.	Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)   o
	13.	Percent of Class Represented by Amount in Row (11) 14.8%
	14.	Type of Reporting Person (See Instructions) IN

CUSIP No.  88650Q100
	1.	Names of Reporting Persons. Michael R. Murphy
	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)			o
		(b)			o
	3.	SEC Use Only
	4.	Source of Funds (See Instructions) AF
	5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)     o
	6.	Citizenship or Place of Organization United States of America
Number of Shares Beneficially Owned by Each Reporting Person With			7.	Sole Voting Power None.
			8.	Shared Voting Power 2,459,404
			9.	Sole Dispositive Power None.
			10.	Shared Dispositive Power 2,459,404
	11.	Aggregate Amount Beneficially Owned by Each Reporting Person 2,459,404
	12.	Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)   o
	13.	Percent of Class Represented by Amount in Row (11) 14.8%
	14.	Type of Reporting Person (See Instructions) IN

Item 1.	Security and Issuer
	This Amendment No. 13 to Schedule 13D (“Amendment No. 13”) 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 11130 Sunrise Valley Drive, Suite 300, Reston Virginia 20191.  This Amendment No. 13 amends and supplements, as set forth below, the information contained in items 1, 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, Amendment No. 5 thereto filed by the Reporting Persons on December 4, 2008, Amendment No. 6 thereto filed by the Reporting Persons on March 12, 2009, Amendment No. 7 thereto filed by the Reporting Persons on January 7, 2010, Amendment No. 8 thereto filed by the Reporting Persons on March 2, 2010, Amendment No. 9 thereto filed by the Reporting Persons on September 8, 2010, Amendment No. 10 thereto filed by the Reporting Persons on November 2, 2010, Amendment No. 11 thereto filed by the Reporting Persons on January 21, 2011 and Amendment No. 12 thereto filed by the Reporting Persons on February 22, 2011 (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. 13, 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. 13.
Item 4.	Purpose of Transaction
	Item 4 of the Schedule 13D is hereby amended by adding the following as the twenty-second paragraph thereof: On April 25, 2011, Discovery Equity Partners sent a letter to the Board of Directors of the Company (the “Board”).  The letter relates to the Reporting Persons’ recommendation that the Board should immediately engage an investment bank and proactively pursue all strategic and financial alternatives, including a sale of the company.  The description of this aforementioned letter of Discovery Equity Partners contained in this Schedule 13D is qualified in its entirety by reference to the full text of such letter, which is included as Exhibit 1 to this Amendment No. 13 and is incorporated by reference herein.

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 16,596,621 shares of Common Stock reported outstanding as of April 13, 2011 in the Company’s most recent Annual Report on Form 10-K/A, for the fiscal year ended September 30, 2010. Discovery Equity Partners beneficially owns 2,109,667 shares of Common Stock as of April 25, 2011, which represents 12.7% of the outstanding Common Stock. Discovery Group beneficially owns 2,459,404 shares of Common Stock as of April 25, 2011, which represents 14.8% of the outstanding Common Stock. Mr. Donoghue beneficially owns 2,459,404 shares of Common Stock as of April 25, 2011, which represents 14.8% of the outstanding Common Stock.

		Mr. Murphy beneficially owns 2,459,404 shares of Common Stock as of April 25, 2011, which represents 14.8% 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.
		There have been no transactions in Common Stock effected by the Reporting Persons during the past 60 days. 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. 13 included as Exhibit 2 to this Amendment No. 13, 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. 13.
Item 7.	Material to Be Filed as Exhibits
	Exhibit 1:                                Letter dated April 25, 2011 of Discovery Equity Partners to the Board of Directors of the Company.
	Exhibit 2:                                Joint Filing Agreement dated as of April 26, 2011, 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.

Signature

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

April 26, 2011

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 Index

Exhibit 1:	Letter dated April 25, 2011 of Discovery Equity Partners to the Board of Directors of the Company.
Exhibit 2:	Joint Filing Agreement dated as of April 26, 2011, 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.

EX-1

EXHIBIT 1

Michael R. Murphy

1 312 265 9605

mmurphy@thediscoverygroup.com

April 25, 2011

Board of Directors

Tier Technologies

11130 Sunrise Valley Drive

Suite 300

Reston, VA 20191

Dear Directors:

As the largest shareholder in Tier Technologies, we are writing to our directors to provide an explicit recommendation for the agenda at the upcoming May board meeting.  Discovery has been a shareholder longer than most directors have been on the board, we have interfaced with several generations of Tier executives, and our nominees spent time as directors in 2009 and 2010.  Given our intimate knowledge of the company and our status as the largest shareholder, we feel it is important to let you know, in no uncertain terms, our strong recommendation:

The Tier board must immediately engage an investment bank and proactively pursue all strategic and financial alternatives, including a sale of the company.

The logic is simple:

1)   Tier is woefully undervalued and with an enterprise value of about $30 million should no longer bear the costs of public ownership

2)   Several strategic and financial parties have expressed interest in acquiring Tier and have contacted shareholders, management, and directors

3)   The majority of shareholders are long term investors that have become increasingly frustrated with Tier and have a strong desire to have the company sold for a premium

4)   An objective analysis of Tier’s inherent value suggests that a sale process will deliver a value range $7.00 to $9.00 per share, a 40 % to 80 % premium to Tier’s current market price of $5.00 per share.

5)   Tier finally has a management team and board of directors in place with the industry, governance, and deal experience to objectively consider all strategic alternatives

We have a detailed analysis of the current situation at Tier providing ample evidence to support our assertions.  The rationale is compelling and the logic is clear if directors wish to serve the best interest of shareholders. We would be happy to elaborate on our analysis and present additional details at the upcoming meeting.

Sincerely,

Michael R. Murphy

Discovery Group

EX-2

EXHIBIT 2

JOINT FILING AGREEMENT

The undersigned hereby agree to the joint filing of Amendment No. 13 to the Schedule 13D to which this Agreement is attached.

Dated:  April 26, 2011

DISCOVERY GROUP I, LLC
for itself and as general partner of
DISCOVERY EQUITY PARTNERS, L.P.
By	Michael R. Murphy*
	Michael R. Murphy
	Managing Member
Daniel J. Donoghue*
Daniel J. Donoghue
Michael R. Murphy*
Michael R. Murphy
*By:	/s/ Mark Buckley
	Mark Buckley
	Attorney-in-Fact for Daniel J. Donoghue
	Attorney-in-Fact for Michael R. Murphy

EX-3

EXHIBIT 3

POWER OF ATTORNEY

The undersigned, Daniel J. Donoghue, hereby appoints Mark Buckley his true and lawful attorney-in-fact and agent, with full power to execute and file with the United States Securities and Exchange Commission and any stock exchange or similar authority, for and on his behalf in any and all capacities, any and all reports required to be filed pursuant to Section 13 of the Securities Exchange Act of 1934 and the rules thereunder on Schedule 13D or 13G, any and all amendments to such reports, with all exhibits, and any other forms or documents as may be necessary in connection with the filing of such reports with the United States Securities and Exchange Commission and any stock exchange or similar authority, granting unto said attorney full power and authority to do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete, as fully as the undersigned might or could do in person.

This Power of Attorney shall remain in full force and effect until revoked by the undersigned in a signed writing delivered to the foregoing attorney-in-fact and agent.

IN WITNESS WHEREOF the undersigned has caused this Power of Attorney to be executed this 28th day of April, 2008.

/s/ Daniel J. Donoghue

Daniel J. Donoghue

STATE OF ILLINOIS                )

                      ) SS.

COUNTY OF COOK                  )

I, Kareema M. Cruz, a Notary Public in and for the County of Cook, State of Illinois, DO HEREBY CERTIFY that Daniel J. Donoghue, who is personally known to me to be the same person whose name is subscribed to the foregoing instrument, appeared before me this day in person and acknowledged that he signed and delivered the said instrument as his own free and voluntary act, for the uses and purposes therein set forth.

Given under my hand and notarial seal, this 28th day of April, 2008.

/s/ Kareema M. Cruz

Notary Public

EX-4

EXHIBIT 4

POWER OF ATTORNEY

The undersigned, Michael R. Murphy, hereby appoints Mark Buckley his true and lawful attorney-in-fact and agent, with full power to execute and file with the United States Securities and Exchange Commission and any stock exchange or similar authority, for and on his behalf in any and all capacities, any and all reports required to be filed pursuant to Section 13 of the Securities Exchange Act of 1934 and the rules thereunder on Schedule 13D or 13G, any and all amendments to such reports, with all exhibits, and any other forms or documents as may be necessary in connection with the filing of such reports with the United States Securities and Exchange Commission and any stock exchange or similar authority, granting unto said attorney full power and authority to do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete, as fully as the undersigned might or could do in person.

This Power of Attorney shall remain in full force and effect until revoked by the undersigned in a signed writing delivered to the foregoing attorney-in-fact and agent.

IN WITNESS WHEREOF the undersigned has caused this Power of Attorney to be executed this 28th day of April, 2008.

/s/ Michael R. Murphy

Michael R. Murphy

STATE OF ILLINOIS	)
	) SS.
COUNTY OF COOK	)

I, Kareema M. Cruz, a Notary Public in and for the County of Cook, State of Illinois, DO HEREBY CERTIFY that Michael R. Murphy, who is personally known to me to be the same person whose name is subscribed to the foregoing instrument, appeared before me this day in person and acknowledged that he signed and delivered the said instrument as his own free and voluntary act, for the uses and purposes therein set forth.

Given under my hand and notarial seal, this 28th day of April, 2008.

/s/ Kareema M. Cruz

Notary Public