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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

For the quarterly period ended January 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.

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).

The number of shares outstanding of our common stock as of March 8, 2006 was 42,377,901.

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KORN/FERRY INTERNATIONAL AND SUBSIDIARIES

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PART I. FINANCIAL INFORMATION

KORN/FERRY INTERNATIONAL AND SUBSIDIARIES

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

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

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 nine months ended January 31, 2006 and 2005 include the accounts of Korn/Ferry International and all of its wholly and majority owned 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, 2005 (“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 consolidated balance sheets as of January 31, 2006 and April 30, 2005. 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

On December 16, 2004, the Financial Accounting Standards Board (“FASB”) issued FASB Statement No. 123 (revised 2004) (“Statement 123(R)”), Share-Based Payment, which is a revision of FASB Statement No. 123, Accounting for Stock-Based Compensation (“Statement 123”). Statement 123(R) supersedes APB Opinion No. 25, Accounting for Stock Issued to Employees (“APB Opinion No. 25”), and amends FASB Statement No. 95, Statement of Cash Flows.

Statement 123(R) is required to be adopted in fiscal years beginning after June 15, 2005. The Company expects to adopt Statement 123(R) on May 1, 2006, using the modified prospective method, as described in the statement.

The Company currently accounts for share-based payments to employees using APB Opinion No. 25’s intrinsic value method and, as such, generally recognizes no compensation cost for employee stock options. Accordingly, the adoption of Statement 123(R)’s fair value method will have a significant impact on the Company’s results of operations, although it will have minimal impact on the

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KORN/FERRY INTERNATIONAL AND SUBSIDIARIES

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS -

(Continued)

(in thousands, except per share amounts)

Company’s overall financial position, and no impact on cash flow. The impact of adoption of Statement 123(R) cannot be predicted at this time as it depends on levels of share-based payments granted in the future. However, had the Company adopted Statement 123(R) in prior periods, the impact of that standard would have approximated the impact of Statement 123 as described in the disclosure of pro forma net income and earnings per share in the table below. Statement 123(R) also requires that the benefits of tax deductions in excess of recognized compensation cost be reported as a financing cash flow, rather than as an operating cash flow as required under current literature. This requirement will reduce net operating cash flows and increase net financing cash flows in periods after adoption. While the Company cannot estimate what those amounts will be in the future as they depend on, among other things, when employees exercise stock options, the amount of tax benefit recognized in operating cash flow was $3,641 and $3,278 for the nine months ended January 31, 2006 and 2005, respectively.

The following table illustrates the effect on net income and earnings per share as if the Company had applied the fair value recognition provisions of Statement 123(R):

The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model with a zero dividend rate. The following assumptions were used by the Company for options granted in the respective periods:

The Black-Scholes option valuation model was developed for use in estimating the fair value of traded options. The assumptions used in option valuation models are subjective. 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)

Common Stock

The Company issued approximately 699 and 1,417 common shares as a result of the exercise of stock options and 77 and 183 common shares in conjunction with the Company’s employee stock purchase plan in the three and nine months ended January 31, 2006, respectively. The Company issued 577 and 1,324 common shares as a result of the exercise of stock options and 55 and 153 common shares in conjunction with the Company’s employee stock purchase plan in the three and nine months ended January 31, 2005, respectively.

Reclassifications

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

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 earnings per share 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 January 31, 2006 includes foreign currency translation adjustments and gains on marketable securities, net of taxes, of $8,082 and $654, 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 an $8,188 ECAP contribution in the nine months ended January 31, 2006. The Company contribution vests and is expensed ratably over the 3 year vesting period.

The Company also has a defined benefit pension plan, referred to as the Worldwide Executive Benefit Plans (“WEB” plans), covering certain executives in the United States and foreign countries. The components of net periodic benefit cost are as follows:

5. Mandatorily Redeemable Convertible Securities

In June 2002, the Company issued 7.5% Convertible Subordinated Notes in an aggregate principal amount of $40.0 million and 10,000 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 274,207 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

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KORN/FERRY INTERNATIONAL AND SUBSIDIARIES

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS -

(Continued)

(in thousands, except per share amounts)

(together “the securities”) of $1.2 million and $0.3 million, 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 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 $4.3 million that have been deferred and are being amortized over the life of the securities as interest expense with $3.4 million allocated to the notes and $0.9 million allocated to the preferred stock.

6. Business Segments

The Company operates in two global business segments in the retained recruitment industry: 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 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:

7. Subsequent Event

On February 16, 2006 the Internal Revenue Service completed an audit of the Company’s Federal Income Tax returns from April 30, 1997 to April 30, 2003. As a result of the audit, the Company will record a one-time tax benefit in the fourth quarter of the current fiscal year.

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KORN/FERRY INTERNATIONAL AND SUBSIDIARIES

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS -

(Continued)

(in thousands, except per share amounts)

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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 consolidated financial statements included in this Form 10-Q.

Executive Summary

We are the leading provider of executive search, outsourced recruiting and leadership development solutions with the broadest global presence in the recruitment 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 2005 were for board level, chief executive and other senior executive positions. Our 4,160 clients in fiscal 2005 included approximately 47% of the Fortune 500 companies. We have established strong client loyalty; more than 82% of the executive recruitment assignments we performed in fiscal 2005 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 2006 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 11% in the third quarter of fiscal 2006 to $129.6 million compared to prior year third quarter primarily due to an 11% increase in the number of engagements opened in the executive search segment, in addition to an increase in engagements opened in Futurestep. The North American region experienced the largest dollar increase in fee revenue in executive recruitment, as revenue increased 16% due to an 8% increase in the number of engagements opened in the quarter combined with a 6% increase in average fees per engagement. Futurestep experienced a 25% increase in fee revenue over the prior year’s quarter as engagements opened in the period increased versus the prior year quarter. In the third quarter of fiscal 2006, we earned operating income of $18.7 million, with operating income of $24.4 million and $1.4 million from executive recruitment and Futurestep, respectively, offset by corporate expenses of $7.1 million.

Our total long-term debt at January 31, 2006 was $45.1 million. Our working capital increased $59.9 million to $206.0 million at January 31, 2006 compared to $146.1 million at April 30, 2005. Major factors contributing to increases in working capital include

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cash inflows of $16.8 million resulting from increased stock option exercises and purchases in our ESPP during the fiscal year as well as increased receivables of $20.9 million resulting from increased revenue generated during the fiscal year.

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 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 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 2005 Annual Report on Form 10-K.

Results of Operations

The following table summarizes the results of our operations for the three and nine month periods ended January 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).

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