FORM 11-K
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

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

  For the fiscal year ended          December 31, 2005

{  } 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 Corporation1235
“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, 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, 2005 and 2004

Statements of Changes in Net Assets Available for Benefits for the Three-Year Period Ended
    December 31, 2005

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, 2005 and 2004, and the related statements of changes in net assets available for benefits for the three-year period ended December 31, 2005. 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, 2005 and 2004, and the changes in net assets available for benefits for the three-year period ended December 31, 2005 in conformity with U.S. generally accepted accounting principles.

Our audits were performed for the purpose of forming an opinion on the basic 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 audit 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 whole.

/s/ KPMG LLP

Lincoln, Nebraska
June 15, 2006


TIERONE BANK SAVINGS PLAN

Statements of Net Assets Available for Benefits

December 31, 2005 and 2004

2005
2004
Assets:            
     Investments:          
        At fair value:          
           American Century Income & Growth Account   $ --  1,995,781  
           American Century Small Cap Value Account    --    1,204,121  
           American Century Large Cap Value II Account    1,292,274    --  
           Mason Street Aggressive Growth Account    340,671    489,168  
           Principal Diversified International Account    3,280,119    3,393,882  
           Principal International Small Company Account    811,830    835,761  
           Principal Large Cap Stock Index Account    2,755,494    3,405,911  
           Principal Money Market Account    1,954,677    5,328,517  
           Principal U.S. Property Account    3,187,887    3,234,589  
           Principal Bond and Mortgage Account    2,962,668    3,580,316  
           Principal Bond Emphasis Balanced Account    367,533    355,346  
           Principal Stock Emphasis Balanced Account    370,548    352,598  
           Principal Partners Small Cap Value II Account    1,175,654    --
           Principal Partners Large Cap Blend Account    2,013,136    2,940,658  
           Principal Partners Large Cap Blend I Account    2,612,877    2,672,885  
           Principal Partners Large Cap Growth II Account    370,397    430,088  
           Principal Partners Large Cap Growth Account    765,030    1,206,873  
           Principal Partners Mid Cap Growth I Account    847,594    819,520  
           Principal Mid Cap Stock Index Account    1,336,333    1,060,340  
           Principal International Emerging Markets Account    1,206,332    673,931  
           Principal Total Market Stock Index Account    496,833    601,972  
           TierOne Corporation Common Stock    10,924,422    9,427,268  
           Principal Guaranteed Interest Account    2,330,446    2,255,405  


                 Net assets available for benefits   $ 41,402,755    46,264,930  


See accompanying notes to financial statements  

2


TIERONE BANK SAVINGS PLAN

Statements of Changes in Net Assets Available for Benefits

Years ended December 31, 2005, 2004, and 2003

2005
2004
2003
Additions to net assets attributed to:                
     Net appreciation in fair              
        value of investments   $ 4,269,111    3,146,050    5,893,738  
     Dividends    62,919    74,077    --



     4,332,030    3,220,127    5,893,738  



     Contributions:              
        Employer    629,956    522,320    526,578  
        Participant    1,891,437    1,570,136    1,293,743  
        Rollover    357,055    102,425    249,547  



                 Total contributions    2,878,448    2,194,881    2,069,868  



                 Total additions    7,210,478    5,415,008    7,963,606  



Deductions from net assets attributed to:              
     Benefits paid to participants    12,065,594    3,724,013    1,122,063  
     Administrative expenses    7,059    2,935    2,113  



                 Total deductions    12,072,653    3,726,948    1,124,176  



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



                 Net increase (decrease)    (4,862,175 )  19,281,640    6,839,430  
Net assets available for benefits:              
     Beginning of year    46,264,930    26,983,290    20,143,860  



     End of year   $ 41,402,755    46,264,930    26,983,290  



See accompanying notes to financial statements.

3


TIERONE BANK SAVINGS PLAN

Notes to Financial Statements

December 31, 2005, 2004, and 2003

(1) Description of Plan

  The following description of the TierOne Bank (the Bank) Savings Plan (the 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, 1997, 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 that complete six months of service become 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. During the first three months of 2003, the Bank contributed 80% of the employee’s contribution up to a maximum of 6% of the employee’s salary. Beginning April 2003, the Bank decreased its contribution amount to 50% of the employee’s contribution up to a maximum of 6% of the employee’s salary. The Bank 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, and plan earnings and charged with an allocation of administrative expenses. Allocations are based on participant earnings or account balances as defined. 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 at three years of service.

  (f) Payment of Benefits

  On termination of service due to death, disability, 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 as 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.

(Continued)

TIERONE BANK SAVINGS PLAN

Notes to Financial Statements

December 31, 2005, 2004, and 2003

  (g) Forfeitures

  For the years ended December 31, 2005, 2004, and 2003, forfeitures in nonvested accounts totaling $13,171, $2,372, and $11,031, respectively, were used to reduce employer contributions.

(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 generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and 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 plan benefits and the statements of changes in net assets available for plan benefits.

  (f) Concentrations of Investments

  Included in the Plan’s net assets available for benefits at December 31, 2005 and 2004 are investments in TierOne Corporation common stock amounting to $10.9 million and $9.4 million, respectively, whose value could be subject to change based on market conditions.

(Continued)

TIERONE BANK SAVINGS PLAN

Notes to Financial Statements

December 31, 2005, 2004, and 2003

(3) Investments

  During 2005, 2004, and 2003, net appreciation (depreciation) in fair value of investments was as follows:

2005
2004
2003
American Century Income & Growth Account     $(76,320 )  116,656    106,880  
American Century Select Account    --    182,501    15,440  
American Century Small Cap Value Account    (70,046 )  390    178,014  
American Century Large Cap Value II Account    98,547    --    --  
Janus Advisor Aggressive Growth Account    --    74,655    100,906  
Mason Street Aggressive Growth Account    11,589    26,124    4,948  
Principal Guaranteed Interest Account    (9,106 )  78,708    94,788  
Principal Diversified International Account    665,108    102,995    396,447  
Principal International Small Company Account    196,524    427,736    32,759  
Principal Large Cap Stock Index Account    110,721    262,817    493,448  
Principal Money Market Account    63,582    21,736    7,335  
Principal U.S. Property Account    490,443    242,212    104,698  
Principal Bond and Mortgage Account    74,819    107,617    102,743  
Principal Bond Emphasis Balanced Account    30,509    31,905    49,740  
Principal Stock Emphasis Balanced Account    35,218    37,348    68,034  
Principal Partners Small Cap Value II Account    166,349    --    --  
Principal Partners Large Cap Blend Account    87,967    299,055    68,794  
Principal Partners Large Cap Blend I Account    163,143    186,387    588,461  
Principal Partners Large Cap Growth II Account    11,669    23,230    --  
Principal Partners Large Cap Growth Account    23,816    58,556    --  
Principal Mid Cap Growth I Account    96,160    --    --  
Principal Mid Cap Stock Index Account    132,882    125,305    157,057  
Principal International Emerging Markets Account    259,696    84,750    94,837  
Principal Total Market Stock Index Account    20,819    32,392    13,864  
Putnam Voyager Account    --    (5,552 )  73,604  
TierOne Corporation Common Stock    1,685,022    628,527    3,140,941  



    $ 4,269,111    3,146,050    5,893,738  





(Continued)

TIERONE BANK SAVINGS PLAN

Notes to Financial Statements

December 31, 2005, 2004, and 2003

  The following table presents investments that represent 5% or more of the Plan’s net assets:

2005
2004
2003
Principal Guaranteed Interest Account     $ 2,330,446    *    2,281,733  
Principal Diversified International Account    3,280,119    3,393,882    1,512,240  
Principal Money Market Account    *    5,328,517    *  
Principal Large Cap Stock Index Account    2,755,494    3,405,911    2,395,837  
Principal U.S. Property Account    3,187,887    3,234,589    1,432,811  
Principal Bond and Mortgage Account    2,962,668    3,580,316    2,014,884  
Principal Partners Large Cap Blend Account    *    2,940,658    *  
Principal Partners Large Cap Blend I Account    2,612,877    2,672,885    2,617,111  
TierOne Corporation Common Stock    10,924,422    9,427,268    8,943,533  

   * 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%, 3.47%, and 4.04% for 2005, 2004, and 2003, 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 $7,059, $2,935, and $2,113 for the years ended December 31, 2005, 2004, and 2003, respectively.

(6) Plan Termination

  Although it has not expressed any present intention to do so, the Bank has the right under the Plan to discontinue its contributions at any time and to terminate the Plan subject to the provisions of ERISA. In the event of Plan termination, participants would become 100% vested in their employer contributions.

(Continued)

TIERONE BANK SAVINGS PLAN

Notes to Financial Statements

December 31, 2005, 2004, and 2003

(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.





8


Schedule

TIERONE BANK SAVINGS PLAN

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

December 31, 2005

(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:
*     American Century Large Cap Value II Account Pooled separate account ** $     1,292,274 
*     Mason Street Aggressive Growth Account Pooled separate account ** 340,671 
*     Principal Diversified International Account Pooled separate account ** 3,280,119 
*     Principal International Small Company Account Pooled separate account ** 811,830 
*     Principal Large Cap Stock Index Account Pooled separate account ** 2,755,494 
*     Principal Money Market Account Pooled separate account ** 1,954,677 
*     Principal U.S. Property Account Pooled separate account ** 3,187,887 
*     Principal Bond and Mortgage Account Pooled separate account ** 2,962,668 
*     Principal Bond Emphasis Balanced Account Pooled separate account ** 367,533 
*     Principal Stock Emphasis Balanced Account Pooled separate account ** 370,548 
*     Principal Partners Small Cap Value II Account Pooled separate account ** 1,175,654 
*     Principal Partners Large Cap Blend Account Pooled separate account ** 2,013,136 
*     Principal Partners Large Cap Blend I Account Pooled separate account ** 2,612,877 
*     Principal Partners Large Cap Growth II Account Pooled separate account ** 370,397 
*     Principal Partners Large Cap Growth Account Pooled separate account ** 765,030 
*     Principal Partners Mid Cap Growth I Account Pooled separate account ** 847,594 
*     Principal Mid Cap Stock Index Account Pooled separate account ** 1,336,333 
*     Principal International Emerging Markets Account Pooled separate account ** 1,206,332 
*     Principal Total Market Stock Index Account Pooled separate account ** 496,833 
*     Principal Guaranteed Interest Account GIC, maturities through 12/31/09 ** 2,330,446 
* TierOne Corporation Common Stock Corporate stock ** 10,924,422 
$    41,402,755 

* 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, 2006
By: /s/ Gilbert G. Lundstrom
       Gilbert G. Lundstrom, on behalf of TierOne
       Bank as the Plan Administrator





EXHIBIT INDEX
TIERONE BANK SAVINGS PLAN
FORM 11-K

FOR THE FISCAL YEAR ENDED DECEMBER 31, 2005

Exhibit No. Description

        23 Consent of KPMG LLP