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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

For the quarterly period ended October 31, 2006 or

For the transition period from                      to                     

Commission File Number 001-14505

KORN/FERRY INTERNATIONAL

(Exact name of registrant as specified in its charter)

1900 Avenue of the Stars, Suite 2600, Los Angeles, California 90067

(Address of principal executive offices) (Zip code)

(310) 552-1834

(Registrant’s telephone number, including area code)

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months, and (2) has been subject to such filing requirements for the past 90 days.  Yes  x    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of “accelerated filer and large accelerated filer” in Rule 12b-2 of the Exchange Act.

Large accelerated filer  x                an accelerated filer  ¨                or a non-accelerated filer  ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes  ¨    No  x

The number of shares outstanding of our common stock as of December 6, 2006 was 42,109,838.

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KORN/FERRY INTERNATIONAL AND SUBSIDIARIES

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PART I. FINANCIAL INFORMATION

KORN/FERRY INTERNATIONAL AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except per share amounts)

(unaudited)

The accompanying notes are an integral part of these consolidated financial statements.

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KORN/FERRY INTERNATIONAL AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(in thousands, except per share amounts)

(unaudited)

The accompanying notes are an integral part of these consolidated financial statements

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KORN/FERRY INTERNATIONAL AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(unaudited)

The accompanying notes are an integral part of these consolidated financial statements

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KORN/FERRY INTERNATIONAL AND SUBSIDIARIES

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except per share amounts)

1. Summary of Significant Accounting Policies

Basis of Presentation

The consolidated financial statements for the three and six months ended October 31, 2006 and 2005 include the accounts of Korn/Ferry International and all of its wholly and majority owned/controlled domestic and international subsidiaries (collectively, the “Company”). The consolidated financial statements are unaudited, but include all adjustments, consisting of normal recurring accruals and any other adjustments that management considers necessary for a fair presentation of the results for these periods. These financial statements have been prepared consistently with the accounting policies described in the Company’s Annual Report on Form 10-K for the fiscal year ended April 30, 2006 (the “Annual Report”) and should be read together with the Annual Report.

Critical Accounting Policies and 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 and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. As a result, actual results could differ from these estimates. The most significant areas that require management judgment are revenue recognition, deferred compensation and the carrying values of goodwill and deferred income taxes.

Cash and Cash Equivalents

The Company considers cash equivalents to be only those investments which are highly liquid, readily convertible and mature within three months from the date of purchase.

Available for Sale Securities

The Company considers its marketable securities as available-for-sale as defined in SFAS No. 115, “Accounting for Certain Investments in Debt and Equity Securities.” These investments are recorded at fair value and are classified as marketable securities in the accompanying condensed consolidated balance sheets as of October 31, 2006 and April 30, 2006. The changes in fair values, net of applicable taxes, are recorded as unrealized gains (losses) as a component of accumulated other comprehensive income in stockholders’ equity. Investments are made based on the Company’s investment policy which restricts the types of investments that can be made.

Stock-Based Compensation

The Company has employee compensation plans under which various types of stock-based instruments are granted. These instruments, as more fully described below, principally include stock options, stock appreciation rights (“SARs”), restricted stock, and an Employee Stock Purchase Plan (“ESPP”).

Prior to May 1, 2006, the Company accounted for employee stock-based compensation under the recognition and measurement principles of Accounting Principles Board Opinion (“APB”) No. 25, “Accounting for Stock Issued to Employees,” (“APB No. 25”), and related Interpretations, as permitted by Statement of Financial Accounting Standards (“SFAS”) No. 123, “Accounting for Stock-Based Compensation” (“SFAS No. 123”). Under the recognition principles of APB No. 25, compensation expense related to restricted stock and SARs was recognized in the Company’s consolidated financial statements. However, APB No. 25 generally did not require the recognition of compensation expense for stock options because the exercise price of these instruments was generally equal to the market value of the underlying common stock on the date of grant, and the related number of shares granted were fixed at that point in time. Compensation expense for the ESPP was not recognized since the ESPP was considered non-compensatory under APB No. 25.

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KORN/FERRY INTERNATIONAL AND SUBSIDIARIES

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(in thousands, except per share amounts)

Effective May 1, 2006, the Company adopted the fair value recognition provisions of SFAS No. 123(R), “Share-Based Payment” (“SFAS No. 123 (R)”). In addition to recognizing compensation expense related to restricted stock and SARs, SFAS No. 123(R) also requires the Company to recognize compensation expense related to the estimated fair value of stock options and for purchases under the ESPP. The Company adopted SFAS No. 123(R) using the modified-prospective-transition method. Under that transition method, compensation expense recognized subsequent to adoption includes: (a) compensation cost for all share-based payments granted prior to, but not yet vested as of May 1, 2006, based on the values estimated in accordance with the original provisions of SFAS No. 123, and (b) compensation cost for all share-based payments granted subsequent to May 1, 2006, based on the grant-date fair values estimated in accordance with the provisions of SFAS No. 123(R). Consistent with the modified-prospective-transition method, the Company’s results of operations for prior periods have not been adjusted to reflect the adoption of SFAS No. 123(R).

As a result of recognizing compensation expense for stock options and the ESPP pursuant to the provisions of SFAS No. 123(R), the Company’s income before income taxes and net income for the three months ended October 31, 2006, were $1,410 and $880 lower, respectively, than if the Company had continued to account for the stock-based compensation under APB No. 25. For the six months ended October 31, 2006, the Company’s income before income taxes and net income were $3,292 and $2,054 lower, respectively. In addition, basic and diluted earnings per share (“EPS”) for the three months ended October 31, 2006 were $0.02 and $0.02 lower, respectively, than if the Company had continued to account for the stock-based compensation under APB No.25. For the six months ended October 31, 2006, the Company’s basic and diluted EPS were $0.05 and $0.04 lower, respectively.

The following table reflects the components of stock-based compensation expense recognized in the Company’s condensed consolidated statements of income for the three and six months ended October 31, 2006 and 2005:

The above table does not reflect any stock option or ESPP compensation for the three and six months ended October 31, 2005 as the Company generally did not record stock option or ESPP expense under APB No. 25, as previously discussed.

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KORN/FERRY INTERNATIONAL AND SUBSIDIARIES

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(in thousands, except per share amounts)

The following table illustrates the effect on net income and EPS for the three and six months ended October 31, 2005 if we had applied the fair value recognition provisions as provided under SFAS No. 123:

The Company uses the Black-Scholes option valuation model to estimate the grant date fair value of employee stock options. The expected volatility reflects the consideration of the historical volatility in the Company’s publicly traded instruments during the period the option is granted. The Company believes historical volatility in these instruments is more indicative of expected future volatility than the implied volatility in the price of the Company’s common stock. The expected life of the option is estimated using historical data to estimate the expected life of the options. The risk-free interest rate is based on the U.S. Treasury zero-coupon issue with a remaining term approximating the expected term of the options. Upon adoption of SFAS No. 123(R), the Company began using historical data to estimate forfeiture rates applied to the gross amount of expense determined using the option valuation model. Prior to adoption of SFAS No. 123(R), the Company recognized forfeitures as they occurred. There was no material impact upon adoption of SFAS No. 123(R) between these methods of accounting for forfeitures. The assumptions used to estimate the fair value of the stock options using the Black-Scholes option valuation model were as follows for the six months ended October 31:

The Black-Scholes option pricing model was developed for use in estimating the fair value of traded options. The assumptions used in option valuation models are highly subjective, particularly the expected stock price volatility of the underlying stock. For purposes of pro forma disclosures, the estimated fair values of the options are amortized over the options’ vesting periods.

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KORN/FERRY INTERNATIONAL AND SUBSIDIARIES

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(in thousands, except per share amounts)

Stock Option Plans

The Company’s employee stock option plans provide for option grants designated as either nonqualified, incentive stock options or SARs. Options granted to officers, non-employee directors and other key employees generally vest over a three to five year period, and generally expire ten years from the date of grant. Key employees are eligible to receive a grant of stock options annually with the number of options determined by the employee’s performance level. In addition, certain key management personnel typically receive stock option or restricted stock grants upon commencement of employment.

Stock option and SARs information during the six months ended October 31, 2006 is as follows:

Included in the table above are 72 SARs outstanding at October 31, 2006 with a weighted-average exercise price of $11.74, and 71 SARs exercisable at October 31, 2006 with a weighted-average exercise price of $11.69. As of October 31, 2006, there was $6,227 of total unrecognized compensation cost related to nonvested awards of stock options and SARs. That cost is expected to be recognized over a weighted-average period of one year. For stock option awards subject to graded vesting that were issued after May 1, 2006, we recognize the total compensation cost on a straight-line basis over the service period for the entire award.

Additional information pertaining to stock options:

Restricted Stock

The Company grants restricted stock to executive officers and other senior employees generally vesting over a three to four year period. Restricted stock is granted at a price equal to the fair market value of the common stock on the date of grant. Employees may receive restricted stock annually in conjunction with the Company’s performance

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KORN/FERRY INTERNATIONAL AND SUBSIDIARIES

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(in thousands, except per share amounts)

review as well as throughout the year upon commencement of employment. The fair values of restricted stock shares are determined based on the closing price of the Company’s common stock on the grant dates.

Information regarding our restricted stock during the six months ended October 31, 2006 is as follows:

As of October 31, 2006, there was $10,620 of total unrecognized compensation cost related to nonvested awards of shares of restricted stock. That cost is expected to be recognized over a weighted-average period of 1.7 years. For restricted stock awards subject to graded vesting that were issued after May 1, 2006, the Company recognizes the total compensation cost on a straight-line basis over the service period for the entire award. In the three and six months ended October 31, 2006, two and 70 restricted stock shares totaling $53 and $1,381, respectively, were repurchased by the Company at the option of the employee to pay for taxes on restricted stock shares vesting in the periods.

Employee Stock Purchase Plan

In October 2003, the Company implemented an ESPP that, in accordance with Section 423 of the Internal Revenue code, allows eligible employees to authorize payroll deductions of up to 15% of their salary to purchase shares of the Company’s common stock at 85% of the fair market price of the common stock on the last day of the enrollment period. The maximum number of shares of common stock reserved for ESPP issuance is 1.5 million, subject to adjustment for certain changes in the Company’s capital structure and other extraordinary events. During the six months ended October 31, 2006 and 2005, employees purchased 85 shares at $16.65 per share, and 106 shares at $15.09 per share, respectively. Employees did not purchase any shares in the three months ended October 31, 2006 and 2005. At October 31, 2006, the plan had approximately 1.0 million shares available for future issuance.

Common Stock

The Company issued approximately 729 and 1,095 common shares as a result of the exercise of stock options and 85 common shares in conjunction with the Company’s ESPP in the three and six months ended October 31, 2006, respectively. The Company issued approximately 293 and 718 common shares relating to the exercise of stock options and 106 common shares in conjunction with the Company’s ESPP in the three and six months ended October 31, 2005, respectively.

Reclassifications

Certain prior period amounts have been reclassified to conform to the current period presentation.

New Accounting Standards

In July 2006, the FASB issued FASB Interpretation No. 48, “Accounting for Uncertainty in Income Taxes” (“FIN 48”). Among other things, FIN 48 creates a model to address uncertainty in tax positions and clarifies the accounting for income taxes by prescribing a minimum recognition threshold which all income tax positions must achieve to meet

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KORN/FERRY INTERNATIONAL AND SUBSIDIARIES

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(in thousands, except per share amounts)

before being recognized in the financial statements. In addition, FIN 48 requires expanded annual disclosures, including a tabular rollforward of the beginning and ending aggregate unrecognized tax benefits as well as specific detail related to tax uncertainties for which it is reasonably possible the amount of unrecognized tax benefit will significantly increase or decrease within 12 months. FIN 48 is effective for the Company on May 1, 2007. Any differences between the amounts recognized in the statement of financial position prior to the adoption of FIN 48 and the amounts reported after adoption are generally accounted for as a cumulative-effect adjustment recorded to the beginning balance of retained earnings. The Company is currently evaluating the impact of FIN 48; however, it is not expected to have a material impact on the Company’s consolidated financial position and results of operations.

2. Basic and Diluted Earnings Per Share

Basic earnings per common share (“basic EPS”) was computed by dividing net income by the weighted average number of common shares outstanding. Diluted earnings per common share (“diluted EPS”) reflects the potential dilution that would occur if all in-the-money outstanding options or other contracts to issue common stock were exercised or converted and was computed by dividing adjusted net income, after assumed conversion of subordinated notes and preferred stock, by the weighted average number of common shares outstanding plus dilutive common equivalent shares. The following is a reconciliation of the numerator and denominator (shares in thousands) used in the computation of basic and diluted EPS:

Assumed exercises or conversions have been excluded in computing the diluted EPS when their inclusion would be anti-dilutive.

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KORN/FERRY INTERNATIONAL AND SUBSIDIARIES

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(in thousands, except per share amounts)

3. Comprehensive Income

Comprehensive income is comprised of net income and all changes to stockholders’ equity, except those changes resulting from investments by owners (changes in paid in capital) and distributions to owners (dividends).

Total comprehensive income is as follows:

The accumulated other comprehensive income at October 31, 2006 includes foreign currency translation adjustments and gains on marketable securities, net of taxes, of $10,699 and $991, respectively.

4. Deferred Compensation, Pension Plan and Executive Capital Accumulation Plan

The Company has several deferred compensation plans for vice-presidents that provide defined benefit payments to participants based on the deferral of current compensation subject to vesting and retirement or termination provisions. The components of net periodic benefit cost are as follows:

In fiscal 2005, the Company implemented the Executive Capital Accumulation Plan (“ECAP”). ECAP is intended to provide certain employees an opportunity to defer salary and/or bonus on a pre-tax basis, or make an after-tax contribution. The Company made a $26 and $6,633 ECAP contribution in the three and six months ended October 31, 2006, respectively. The Company contribution vests and is expensed ratably over a four year vesting period.

5. Mandatorily Redeemable Convertible Securities

In June 2002, the Company issued 7.5% Convertible Subordinated Notes in an aggregate principal amount of $40,000 and 10 shares of 7.5% Convertible Series A Preferred Stock at an aggregate purchase price of $10.0 million. The notes and preferred stock have priority over common stockholders. The notes and preferred stock are convertible into shares of the Company’s common stock at $10.19 per share. The Company also issued warrants to purchase 274 shares of its common stock at an exercise price of $11.94. The warrants expire in 2012. The warrants were recorded at fair value resulting in discounts on the notes and preferred stock (together “the securities”) of $1,200 and $300, respectively, and are amortized over the life of the securities.

The securities may be redeemed at the option of the purchasers after June 13, 2008, the sixth anniversary of the closing date, at a price equal to 101% of the issuance price plus all accrued interest and dividends. The securities are

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KORN/FERRY INTERNATIONAL AND SUBSIDIARIES

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(in thousands, except per share amounts)

mandatorily redeemable if still outstanding on June 13, 2010, at a price equal to 101% of the issuance price plus accrued interest and dividends. From the third to the sixth year, the securities are subject to optional redemption by the Company at 200% to 250% of the then outstanding principal balance.

Interest and dividends are payable semi-annually in either additional securities or cash at the option of the Company. The Company also incurred issuance costs of $4,300 that have been deferred and are being amortized over the life of the securities as interest expense with $3,400 allocated to the notes and $900 allocated to the preferred stock.

6. Business Segments

The Company operates in two global business segments: executive recruitment and Futurestep. These segments are distinguished primarily by the candidates’ level of compensation. The executive recruitment business segment is managed by geographic regional leaders. Revenue from leadership development solutions and other consulting engagements including revenue from our recent acquisition of the Lominger entities (as defined below), is included in executive recruitment. Futurestep’s worldwide operations are managed by the Chief Executive Officer of Futurestep. The executive recruitment geographic regional leaders and the Chief Executive Officer of Futurestep report directly to the Chief Executive Officer of the Company. The Company also operates a Corporate segment to record global expenses of the Company.

A summary of the Company’s results of operations by business segment are as follows:

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KORN/FERRY INTERNATIONAL AND SUBSIDIARIES

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(in thousands, except per share amounts)

7. Acquisitions

The Company acquired Lominger Limited, Inc., a Minnesota corporation, and Lominger Consulting, Inc., a Minnesota corporation (together referred to as the “Lominger Entities”), as well as all of the intellectual property rights of Drs. Robert W. Eichinger and Michael M. Lombardo (the co-founders of the Lominger Entities), on August 8, 2006. The purchase price for the transaction totaled $24,400, subject to adjustment, and was preliminarily allocated as follows: $3,500 to goodwill, $18,100 to purchased intangibles, $4,500 to total assets acquired and $1,700 to total liabilities assumed. We account for goodwill and purchased intangibles in accordance with SFAS 142, “Goodwill and Other Intangible Assets” (“SFAS No. 142”). Accordingly, the Company’s preliminary estimates of goodwill could be revised during the next twelve months as any necessary final purchase accounting adjustments are recorded. Actual results of operations of the Lominger Entities are included in our condensed consolidated financial statements from August 8, 2006, the effective date of this acquisition.

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Forward-looking Statements

This quarterly report on Form 10-Q may contain certain statements that we believe are, or may be considered to be, “forward-looking” statements, within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. These forward-looking statements generally can be identified by use of statements that include phrases such as “believe”, “expect”, “anticipate”, “intend”, “plan”, “foresee”, “may”, “will”, “estimates”, “potential”, “continue” or other similar words or phrases. Similarly, statements that describe our objectives, plans or goals also are forward-looking statements. All of these forward-looking statements are subject to risks and uncertainties that could cause our actual results to differ materially from those contemplated by the relevant forward-looking statement. The principal risk factors that could cause actual performance and future actions to differ materially from the forward-looking statements include, but are not limited to, dependence on attracting and retaining qualified and experienced consultants, portability of client relationships, local political or economic developments in or affecting countries where we have operations, ability to manage growth, restrictions imposed by off-limits agreements, competition, risks related to the growth and results of Futurestep, reliance on information processing systems, and employment liability risk. Readers are urged to consider these factors carefully in evaluating the forward-looking statements. The forward-looking statements included in this Form 10-Q are made only as of the date of this report and we undertake no obligation to publicly update these forward-looking statements to reflect subsequent events or circumstances.

The following presentation of management’s discussion and analysis of our financial condition and results of operations should be read together with our condensed consolidated financial statements included in this Form 10-Q.

Executive Summary

Korn/Ferry International and all of its wholly and majority owned/controlled domestic and international subsidiaries (collectively, the “Company”, or in the first person, “we”, “us” and “our”) are a leading provider of talent management solutions with the broadest global presence in the executive recruitment segment of the industry. Our services include executive recruitment, middle-management and outsourced recruitment through Futurestep, leadership development solutions and executive coaching. Over half of the executive recruitment searches we performed in fiscal 2006 were for board level, chief executive and other senior executive positions. Our 4,373 clients in fiscal 2006 included approximately 44% of the Fortune 500 companies. We have established strong client loyalty; more than 83% of the executive recruitment assignments we performed in fiscal 2006 were on behalf of clients for whom we had conducted assignments in the previous three fiscal years.

In an effort to achieve our long-term vision of being the leading provider of executive search, outsourced recruiting and leadership development solutions, our strategic focus for fiscal 2007 is centered upon increasing market share and further increasing the cross-selling and utilization of our multi-product strategy. We continue to explore new products and services, enhance our technology and aggressively leverage our brand through thought leadership and intellectual capital projects as a means of delivering world-class service to our clients.

Fee revenue increased 24% in the second quarter of fiscal 2007 to $155.7 million compared to prior year second quarter primarily due to a 14% increase in the number of engagements billed in the executive search segment, resulting from an increase in the number of engagements opened as well as higher average fees in engagements billed. Fee revenue was also impacted by our acquisition of the Lominger Entities on August 8, 2006. The North American region experienced the largest dollar increase in fee revenue in executive recruitment, as revenue increased $17.2 million, or 27%, due to a 9% increase in the number of engagements billed in the quarter combined with an increase in average fees in engagement. Futurestep experienced a 22% increase in fee revenue over the prior year’s quarter as engagements billed in the period increased versus the prior year quarter. In the second quarter of fiscal 2007, we earned operating income of $21.1 million, with operating income of $26.6 million and $1.8 million from executive recruitment and Futurestep, respectively, offset by corporate expenses of $7.3 million.

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Our total long-term debt at October 31, 2006 was $47.3 million. Our working capital increased $2.3 million to $220.5 million at October 31, 2006 compared to $218.2 million at April 30, 2006.

Critical Accounting Policies

The following discussion and analysis of our financial condition and operating results are based on our unaudited condensed consolidated financial statements. Preparation of this quarterly report on Form 10-Q requires us to make estimates and assumptions that affect the reported amount of assets and liabilities, disclosure of contingent assets and liabilities at the date of our financial statements, and the reported amounts of revenue and expenses during the reporting periods. Actual results may differ from those estimates and assumptions. In preparing our interim financial statements and accounting for the underlying transactions and balances, we apply our accounting policies as disclosed in our Notes to Unaudited Condensed Consolidated Financial Statements. We consider the policies related to revenue recognition, deferred compensation and the carrying values of goodwill and deferred income taxes as critical to an understanding of our interim consolidated financial statements because their application places the most significant demands on management’s judgment. Specific risks for these critical accounting policies are described in our Fiscal 2006 Annual Report on Form 10-K.

Results of Operations

The following table summarizes the results of our operations for the three and six month periods ended October 31, 2006 and 2005 as a percentage of fee revenue:

The following tables summarize the results of our operations by business segment. Operating income (loss) is calculated as a percentage of fee revenue of the respective segment (dollars in thousands).