UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 11-K

{X} ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

  For the fiscal year ended December 31, 2006

{   } TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

  For the transition period from _____________________ to _____________________

  Commission file number 000-50015

  A. Full title of the plan and the address of the plan, if different from that of the issuer named below:

TierOne Bank Savings Plan

  B. Name of issuer of securities held pursuant to the plan and the address of its principal executive office:

TierOne Corporation
1235 “N” Street
Lincoln, Nebraska 68508


REQUIRED INFORMATION

        The following financial statements and supplemental schedule of the TierOne Bank Savings Plan are filed herewith.










TIERONE BANK SAVINGS PLAN

Financial Statements and Supplemental Schedule

December 31, 2006, 2005, and 2004

(With Report of Independent Registered Public Accounting Firm Thereon)


TIERONE BANK SAVINGS PLAN

Table of Contents

Page

Report of Independent Registered Public Accounting Firm

Statements of Net Assets Available for Benefits as of December 31, 2006 and 2005

Statements of Changes in Net Assets Available for Benefits for the Three-Year Period Ended
    December 31, 2006

Notes to Financial Statements

Schedule

Schedule H, line 4i--Schedule of Assets (Held at End of Year)

Report of Independent Registered Public Accounting Firm

Employee Benefit Committee
TierOne Bank Savings Plan:

We have audited the accompanying statements of net assets available for benefits of the TierOne Bank Savings Plan (the Plan) as of December 31, 2006 and 2005, and the related statements of changes in net assets available for benefits for the three-year period ended December 31, 2006. These financial statements are the responsibility of the Plan’s management. Our responsibility is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the net assets available for benefits of the Plan as of December 31, 2006 and 2005, and the changes in net assets available for benefits for the three-year period ended December 31, 2006 in conformity with U.S. generally accepted accounting principles.

Our audits were performed for the purpose of forming an opinion on the financial statements taken as a whole. The Supplemental Schedule of Assets (Held at End of Year), is presented for the purpose of additional analysis and is not a required part of the basic financial statements but is supplementary information required by the Department of Labor’s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. This Supplemental Schedule is the responsibility of the Plan’s management. The supplemental schedule has been subjected to the auditing procedures applied in the audits of the basic financial statements and, in our opinion, is fairly stated in all material respects in relation to the basic financial statements taken as a whole.

/s/ KPMG LLP
Lincoln, Nebraska
June 27, 2007



1


TIERONE BANK SAVINGS PLAN

Statements of Net Assets Available for Benefits

December 31, 2006 and 2005

2006
2005
Assets:            
      Investments:  
          At fair value:  
              Principal Guaranteed Interest Account   $ 2,453,874    2,330,446  
              American Century Large Cap Value II Account    1,729,646    1,292,274  
              Mason Street Mid Cap Growth Account    335,681    --
              Mason Street Aggressive Growth Account    --  340,671  
              Principal International Stock Account    4,373,753    3,280,119  
              Principal International Small Company Account    1,223,048    811,830  
              Principal Large Cap Stock Index Account    3,111,703    2,755,494  
              Principal Money Market Account    1,946,558    1,954,677  
              Principal U.S. Property Account    3,963,919    3,187,887  
              Principal Bond and Mortgage Account    3,093,283    2,962,668  
              Principal Bond Emphasis Balanced Account    389,868    367,533  
              Principal Stock Emphasis Balanced Account    403,594    370,548  
              Principal Partners Small Cap Value II Account    1,498,703    1,175,654  
              Principal Partners Large Cap Blend Account    2,371,295    2,013,136  
              Principal Partners Large Cap Blend I Account    2,742,135    2,612,877  
              Principal Partners Large Cap Growth II Account    460,679    370,397  
              Principal Partners Large Cap Growth Account    729,659    765,030  
              Principal Partners Mid Cap Growth I Account    840,129    847,594  
              Principal Mid Cap Stock Index Account    1,433,022    1,336,333  
              Principal International Emerging Markets Account    1,961,743    1,206,332  
              Principal Total Market Stock Index Account    811,795    496,833  
              TierOne Corporation Common Stock Account    11,322,985    10,924,422  


                      Net assets available for benefits   $ 47,197,072    41,402,755  


See accompanying notes to financial statements.




2


TIERONE BANK SAVINGS PLAN

Statements of Changes in Net Assets Available for Benefits

Years ended December 31, 2006, 2005, and 2004

2006
2005
2004
Additions to net assets attributed to:                
      Net appreciation in fair value of investments   $ 5,213,601    4,269,111    3,146,050  
      Dividends    121,863    62,919    74,077  



                      Total investment income    5,335,464    4,332,030    3,220,127  




      Contributions:
  
          Employer    676,335    629,956    522,320  
          Participant    2,086,158    1,891,437    1,570,136  
          Rollover    78,305    357,055    102,425  



                      Total contributions    2,840,798    2,878,448    2,194,881  



                      Total additions    8,176,262    7,210,478    5,415,008  



Deductions from net assets attributed to:  
      Benefits paid to participants    2,376,196    12,065,594    3,724,013  
      Administrative expenses    5,749    7,059    2,935  



                      Total deductions    2,381,945    12,072,653    3,726,948  




Other changes:
  
      Assets transferred in due to plan mergers    --  --  17,593,580  



                      Net increase (decrease)    5,794,317    (4,862,175 )  19,281,640  

Net assets available for benefits:
  
      Beginning of year    41,402,755    46,264,930    26,983,290  



      End of year   $ 47,197,072    41,402,755    46,264,930  



See accompanying notes to financial statements.




3


TIERONE BANK SAVINGS PLAN

Notes to Financial Statements

December 31, 2006, 2005, and 2004

(1) Description of Plan

  The following description of the TierOne Bank (Bank) Savings Plan (Plan) provides only general information. Participants should refer to the Plan agreement for a more complete description of the Plan’s provisions.

  (a) General

  The Plan, established August 1, 1978 and restated as of January 1, 2006, is a defined contribution 401(k) profit sharing plan and is administered by the Employee Benefit Committee. It is subject to the provisions of the Employee Retirement Income Security Act of 1974 (ERISA). The Bank believes the Plan is in compliance with the requirements of ERISA.

  (b) Eligibility

  Employees must complete six months of service to be eligible for participation in the Plan. The employee must make an election to participate in the Plan and agree to make contributions to the Plan by payroll deductions.

  (c) Contributions

  Employees can contribute from 1% to 25% of their salary to the Plan. Participants who have attained age 50 before the end of the Plan year are eligible to make catch-up contributions. Participants may also contribute amounts representing distributions from other qualified defined contribution plans. The Bank makes a matching contribution equal to 50% of an employee’s contribution up to a maximum of 6% of the employee’s salary. The Bank, in its discretion, may make additional contributions to the Plan not to exceed the maximum amount deductible from the Bank’s income under the Internal Revenue Code. Participants must be employed on December 31 to receive an allocation of the Bank’s contribution. Participants direct the investment of their contributions plus the Company’s contributions into various investment options offered by the Plan.

  (d) Participant Accounts

  Each participant's account is credited with the participant's contribution, an allocation of the Bank's contribution, investment gains and losses, and any associated investment expenses. Administrative expenses are paid by the Bank. The benefit to which a participant is entitled is the benefit that can be provided from the participant's vested account.

  (e) Vesting

  Participants are vested immediately in their contributions plus actual earnings thereon. Plan participants become 100% vested in the Bank’s matching contributions after three years of service.

  (f) Payment of Benefits

  On termination of service or retirement, a participant may elect to receive either a single lump-sum amount equal to the value of the participant’s vested interest in the participant’s account or a fixed-period annuity. Participants may also elect to receive a taxable distribution of any part of their contributed vested account balance prior to retirement if plan hardship requirements are met.

4

(Continued)


TIERONE BANK SAVINGS PLAN

Notes to Financial Statements

December 31, 2006, 2005, and 2004

  (g) Forfeitures

  For the years ended December 31, 2006, 2005, and 2004, forfeitures in nonvested accounts totaling $12,476, $13,171, and $2,372, respectively, were used to reduce employer contributions. At December 31, 2006 and 2005, forfeited nonvested accounts totaled $37 and $14,109, respectively.

(2) Summary of Significant Accounting Policies

  (a) Basis of Accounting

  The financial statements of the Plan are prepared under the accrual method of accounting.

  (b) Investment Valuation and Income Recognition

  The Plan’s investments are stated at fair value. Quoted market prices are used to value investments. Each pooled separate account is valued at fair value at the close of each business day. The net investment income (loss) in pooled separate accounts as reflected in the statements of changes in net assets available for benefits consists of realized gains or losses and the unrealized appreciation and depreciation on those investments during the year.

  Purchases and sales of securities are recorded on a trade-date basis. Interest income is recorded on the accrual basis. Dividends are recorded on the ex-dividend date.

  (c) Payment of Benefits

  Benefits are recorded when paid.

  (d) Use of Estimates

  The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, and changes therein, and disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates.

  (e) Risks and Uncertainties

  The Plan invests in various investment securities. Investment securities are exposed to various risks, such as interest rates, market, and credit risks. Due to the level of risk associated with certain investment securities and the level of uncertainty related to changes in the value of investment securities, it is at least reasonably possible that changes in risk in the near term could materially affect participants’ account balances and the amounts reported in the statements of net assets available for benefits and the statements of changes in net assets available for benefits.

  (f) Concentrations of Investments

  Included in the Plan’s net assets available for benefits at December 31, 2006 and 2005 are investments in TierOne Corporation common stock amounting to $11.3 million and $10.9 million, respectively, whose value is subject to change based on market conditions.

5

(Continued)


TIERONE BANK SAVINGS PLAN

Notes to Financial Statements

December 31, 2006, 2005, and 2004

(3) Investments

  During 2006, 2005, and 2004, net appreciation (depreciation) in fair value of investments, was as follows:

2006
2005
2004
American Century Income & Growth Account   $ --  (76,320 )  116,656  
American Century Select Account    --  --  182,501  
American Century Small Cap Value Account    --  (70,046 )  390  
American Century Large Cap Value II Account    264,308    98,547    --
Janus Advisor Aggressive Growth Account    --  --  74,655  
Mason Street Mid Cap Growth Account    (29,549 )  --  --
Mason Street Aggressive Growth Account    40,281    11,589    26,124  
Principal Mid Cap Growth II Account    (5 )  --  --
Principal Guaranteed Interest Account    73,879    (9,106 )  78,708  
Principal International Stock Account    919,671    665,108    427,736  
Principal International Small Company Account    265,154    196,524    102,995  
Principal Large Cap Stock Index Account    409,882    110,721    262,817  
Principal Money Market Account    81,076    63,582    21,736  
Principal U.S. Property Account    485,753    490,443    242,212  
Principal Bond and Mortgage Account    128,684    74,819    107,617  
Principal Bond Emphasis Balanced Account    41,374    30,509    31,905  
Principal Stock Emphasis Balanced Account    51,792    35,218    37,348  
Principal Partners Small Cap Value II Account    238,051    166,349    --
Principal Partners Large Cap Blend Account    311,683    87,967    186,387  
Principal Partners Large Cap Blend I Account    361,975    163,143    299,055  
Principal Partners Large Cap Growth II Account    30,965    11,669    23,230  
Principal Partners Large Cap Growth Account    11,054    23,816    58,556  
Principal Mid Cap Growth I Account    70,656    96,160    --
Principal Mid Cap Stock Index Account    128,337    132,882    125,305  
Principal International Emerging Markets Account    446,138    259,696    84,750  
Principal Total Market Stock Index Account    84,935    20,819    32,392  
Putnam Voyager Account    --  --  (5,552 )
TierOne Corporation Common Stock Account    797,507    1,685,022    628,527  



    $ 5,213,601    4,269,111    3,146,050  




6

(Continued)


TIERONE BANK SAVINGS PLAN

Notes to Financial Statements

December 31, 2006, 2005, and 2004

  The following table represents the fair value of individual investments which exceed 5% of the Plan’s net assets:

2006
2005
2004
Principal Guaranteed Interest Account     $ 2,453,874    2,330,446    *  
Principal International Stock Account    4,373,753    3,280,119    3,393,882  
Principal Money Market Account    *    *    5,328,517  
Principal Large Cap Stock Index Account    3,111,703    2,755,494    3,405,911  
Principal U.S. Property Account    3,963,919    3,187,887    3,234,588  
Principal Bond and Mortgage Account    3,093,283    2,962,668    3,580,316  
Principal Partners Large Cap Blend Account    2,371,295    *    2,940,658  
Principal Partners Large Cap Blend I Account    2,742,135    2,162,877    2,672,885  
TierOne Corporation Common Stock Account    11,322,985    10,924,422    9,427,268  

      * Did not meet the 5% threshold in the applicable year.
  

(4) Guaranteed Interest Account with Insurer

  The Plan entered into a guaranteed interest account with Principal Life Insurance Company who maintains the contributions in a pooled account. The guaranteed interest account is credited with earnings on the underlying investments and charged for plan withdrawals and administrative expenses charged by Principal Life Insurance Company. The guaranteed interest account is included in the financial statements at fair value (which represents contributions made under the contract plus earnings, less withdrawals and expenses) as it is not fully benefit responsive. There are no reserves against contract value for credit risk of the contract issuer or otherwise. The average yield and crediting interest rates approximated 2.94%, 2.94%, and 3.47% for 2006, 2005, and 2004, respectively. The crediting interest rate is based on an agreed-upon formula with the issuer, but cannot be less than 0%.

(5) Related Party Transactions

  The Plan’s investments are shares in pooled funds managed by Principal Life Insurance Company. Principal Life Insurance Company is the custodian as defined by the Plan, and therefore, these transactions qualify as party-in-interest. Fees paid by the Plan for the administrative services amounted to $5,749, $7,059, and $2,935 for the years ended December 31, 2006, 2005, and 2004, respectively.

(6) Plan Termination

  In connection with the merger contemplated by the definitive agreement and plan of merger between CapitalSource, Inc. (CapitalSource) and TierOne Corporation (TierOne) discussed in footnote 9, the Plan would terminate. As part of the termination of the Plan, the Board of Directors of the Bank will provide for a matching contribution, consistent with past practice, for that portion of the plan year beginning on January 1, 2007 that has elapsed prior to the effective date of the merger. Termination of the Plan is subject to the provisions of ERISA. Upon termination of the Plan, participants will become 100% vested in all employer contributions.

7

(Continued)


TIERONE BANK SAVINGS PLAN

Notes to Financial Statements

December 31, 2006, 2005, and 2004

(7) Tax Status

  The Internal Revenue Service has determined and informed the Bank by a letter, dated June 19, 2002, that the Plan and related trust are designed in accordance with applicable sections of the Internal Revenue Code (IRC). Although the Plan has been amended since receiving the determination letter, the Plan administrator and the Plan’s tax counsel believe that the Plan is designed and is currently being operated in compliance with the applicable requirements of the IRC.

(8) Plan Merger

  On August 10, 2004, the United Nebraska Financial Co. Salary Reduction Profit Sharing Plan and the United Nebraska Financial Co. Employee Stock Ownership Plan and Trust were merged with the Plan. In connection therewith, $17,593,580 was transferred to the Plan which has been reflected as a plan merger in the accompanying statements of changes in net assets available for benefits.

(9) Subsequent Event

  On May 17, 2007, TierOne and CapitalSource, issued a press release announcing that they had entered into an agreement and plan of merger, dated May 17, 2007. Pursuant to the merger agreement, TierOne will merge with and into CapitalSource TRS Inc., a wholly-owned subsidiary of CapitalSource.






8


Schedule

TIERONE BANK SAVINGS PLAN

Schedule H, line 4i-Schedule of Assets (Held at End of Year)

December 31, 2006

(a)
(b)
Identity of issue, borrower,
lessor, or similar party

(c)
Description of investment,
including maturity date,
rate of interest, collateral,
par, or maturity value

(d)
Cost

(e)
Current value

Pooled funds on deposit with Principal Life Insurance Company:    
*     Principal Guaranteed Interest Account GIC, maturities through 2010 ** $    2,453,874
*     American Century Large Cap Value II Account Pooled separate account **       1,729,646
*     Mason Street Mid Cap Growth Account Pooled separate account **          335,681
*     Principal International Stock Account Pooled separate account **       4,373,753
*     Principal International Small Company Account Pooled separate account **       1,223,048
*     Principal Large Cap Stock Index Account Pooled separate account **       3,111,703
*     Principal Money Market Account Pooled separate account **       1,946,558
*     Principal U.S. Property Account Pooled separate account **       3,963,919
*     Principal Bond and Mortgage Account Pooled separate account **       3,093,283
*     Principal Bond Emphasis Balanced Account Pooled separate account **          389,868
*     Principal Stock Emphasis Balanced Account Pooled separate account **          403,594
*     Principal Partners Small Cap Value II Account Pooled separate account **       1,498,703
*     Principal Partners Large Cap Blend Account Pooled separate account **       2,371,295
*     Principal Partners Large Cap Blend I Account Pooled separate account **       2,742,135
*     Principal Partners Large Cap Growth II Account Pooled separate account **          460,679
*     Principal Partners Large Cap Growth Account Pooled separate account **          729,659
*     Principal Partners Mid Cap Growth I Account Pooled separate account **          840,129
*     Principal Mid Cap Stock Index Account Pooled separate account **       1,433,022
*     Principal International Emerging Markets Account Pooled separate account **       1,961,743
*     Principal Total Market Stock Index Account Pooled separate account **          811,795
* TierOne Corporation Common Stock Account Corporate stock **     11,322,985

$  47,197,072


* Indicates party-in-interest.
** Historical cost information is omitted as it is no longer required for participant-directed accounts.

See accompanying independent auditors’ report.





9


SIGNATURES

        Pursuant to the requirements of the Securities Exchange Act of 1934, the trustees (or other persons who administer the employee benefit plan) have duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized.

TIERONE BANK SAVINGS PLAN


Dated: June 28, 2007
By:  /s/ Gilbert G. Lundstrom                         
        Gilbert G. Lundstrom, on behalf of TierOne
            Bank as the Plan Administrator










10


EXHIBIT INDEX
TIERONE BANK SAVINGS PLAN
FORM 11-K

FOR THE FISCAL YEAR ENDED DECEMBER 31, 2006

Exhibit No. Description

23
Consent of KPMG LLP