8X8, Inc.
NOTES TO UNAUDITED CONDENSED CONSOLIDATED
FINANCIAL STATEMENTS

8x8, Inc. ("8x8" or the "Company") develops and markets cloud-based business communications services encompassing internally developed Voice over Internet Protocol ("VoIP") technologies. These services enable telephony and video applications as well as web-based conferencing and unified communications capabilities. The Company also provides managed hosting and cloud-based computing services. As of September 30, 2012, the Company had approximately 30,500 business customers.

The Company was incorporated in California in February 1987 and was reincorporated in Delaware in December 1996. The Company's fiscal year ends on March 31 of each calendar year. Each reference to a fiscal year in these notes to the consolidated financial statements refers to the fiscal year ending March 31 of the calendar year indicated (for example, fiscal 2013 refers to the fiscal year ending March 31, 2013).

The accompanying interim condensed consolidated financial statements are unaudited and have been prepared on substantially the same basis as our annual financial statements for the fiscal year ended March 31, 2012. In the opinion of the Company's management, these financial statements reflect all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair statement of our financial position, results of operations and cash flows for the periods presented. 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 disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenue and expenses during the reporting periods. Actual results could differ from these estimates.

The March 31, 2012 year-end condensed consolidated balance sheet data in this document were derived from audited consolidated financial statements and do not include all of the disclosures required by U.S. generally accepted accounting principles. These financial statements should be read in conjunction with the Company's audited consolidated financial statements as of and for the fiscal year ended March 31, 2012 and notes thereto included in the Company's fiscal 2012 Annual Report on Form 10-K.

The results of operations and cash flows for the interim periods included in these financial statements are not necessarily indicative of the results to be expected for any future period or the entire fiscal year.

The Company's VoIP service and product revenue is derived from the sale of IP business telephones and VoIP service.

Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") 605-25 requires that revenue arrangements with multiple deliverables be divided into separate units of accounting if the deliverables in the arrangement meet specific criteria. In addition, arrangement consideration must be allocated among the separate units of accounting based on their relative fair values, with certain limitations. The provisioning of the 8x8 service with the accompanying 8x8 IP telephone constitutes a revenue arrangement with multiple deliverables. In accordance with the guidance of ASC 605-25, the Company allocates 8x8 revenues, including activation fees, among the 8x8 IP telephones and subscriber services. Revenues allocated to these devices are recognized as product revenues during the period of the sale less the allowance for estimated returns during the 30-day trial period. All other revenues are recognized as license and service revenues when the related services are provided. The Company records revenue net of any sales-related taxes that are billed to its customers. The Company believes this approach results in financial statements that are more easily understood by users.

7

Under the terms of the Company's typical subscription agreement, new customers can terminate their service within 30 days of order placement and receive a full refund of fees previously paid. The Company has determined that it has sufficient history of subscriber conduct to make a reasonable estimate of cancellations within the 30-day trial period. Therefore, the Company recognizes new subscriber revenue in the month in which the new order was shipped, net of an allowance for expected cancellations.

The Company recognizes revenue from product sales for which there are no related services to be rendered upon shipment to partners and end users provided that persuasive evidence of an arrangement exists, the price is fixed, title has transferred, collection of resulting receivables is reasonably assured, there are no customer acceptance requirements, and there are no remaining significant obligations. Gross outbound shipping and handling charges are recorded as revenue, and the related costs are included in cost of goods sold. Reserves for returns and allowances for partner and end user sales are recorded at the time of shipment.

Deferred Cost of Goods Sold

Deferred cost of goods sold represents the cost of products sold for which the end customer or distributor has a right of return. The cost of the products sold is recognized contemporaneously with the recognition of revenue, when the subscriber has accepted the service.

Amortization expense for the customer relationship intangible asset is included in sales and marketing expenses. Amortization expense for technology is included in cost of service revenue. The carrying values of intangible assets were as follows (in thousands):

At September 30, 2012, annual amortization of intangible assets, based upon our existing intangible assets and urrent useful lives, is estimated to be the following (in thousands):

8

Deferred Rent

In April 2012, the Company entered into an 87-month lease agreement. Under the terms of the lease agreement:

• the Company received a three month rent holiday from rental payments before;
• base rent is $130,821 for the 15 months after the rent holiday; and
• rent expense increases 3% each year thereafter.

The Company also received a $1.7 million allowance for tenant improvements. In accordance with the guidance in ASC 840-20, Leases, the Company accounts for its headquarters facility operating lease as follows:

Rent Holidays. The Company recognizes the related rent expense on a straight-line basis at the earlier of the first rent payment or the date of possession of the leased property. The difference between the amounts charged to expense and the rent paid is recorded as deferred lease incentives and amortized over the lease term.

Rent Escalations. The Company recognizes escalating rent provisions on a straight-line basis over the lease term. The difference between the amounts charged to expense and the rent paid is recorded as deferred lease incentives and amortized over the lease term.

Tenant Improvement Allowance. The tenant improvement allowance is deferred and amortized on a straight-line basis over the life of the lease as a reduction to rent expense.

In the second quarter of fiscal 2013, the Company received a $1.7 million reimbursement for the cost of tenant improvements included within cash flows from operating activities. At September 30, 2012, total deferred rent included in Other accrued liabilities and Non-current liabilities was $0.1 million and $1.8 million, respectively.

Stock purchase right/restricted stock unit activity since March 31, 2012 is summarized as follows:

9

Option activity since March 31, 2012 is summarized as follows:

The following table summarizes the stock options outstanding and exercisable at September 30, 2012:

10

Stock-based Compensation Expense

The following table summarizes the classification of stock-based compensation expense for the three and six months ended September 30, 2012 and 2011 (in thousands):

As of September 30, 2012, there was $7.7 million of unamortized stock-based compensation expense related to unvested options and stock awards which is expected to be recognized over a weighted average period of 3.36 years.

To value option grants and stock purchase rights/restricted stock units for stock-based compensation, the Company used the Black-Scholes option valuation model. Fair value determined using the Black-Scholes option valuation model varies based on assumptions used for the expected stock price volatility, expected life, risk-free interest rates and future dividend payments. During the three and six month periods ended September 30, 2012 and 2011, the Company used the historical volatility of the Company's stock over a period equal to the expected life of the options. The expected life assumptions represent the weighted-average period the stock-based awards are expected to remain outstanding. These expected life assumptions are established through the review of historical exercise behavior of stock-based award grants with similar vesting periods. The risk-free interest rate is based on the closing market bid yields on actively traded U.S. treasury securities in the over-the-counter market for the expected term equal to the expected term of the option. The dividend yield assumption is based on the Company's history and expectation of future dividend payouts.

The following table summarizes the assumptions used to estimate the fair value of stock options to employees and directors for the three and six months ended September 30, 2012 and 2011:

11

Employee Stock Purchase Plan

Under the Company's Employee Stock Purchase Plan, eligible employees can participate and purchase common stock semi-annually through payroll deductions at a price equal to 85% of the fair market value of the common stock at the beginning of each one year offering period or the end of the applicable six month purchase period within that offering period, whichever is lower. The contribution amount may not exceed 10% of an employee's base compensation, including commissions but not including bonuses and overtime, subject to a calendar year maximum total purchase price per employee of $25,000. The Company accounts for the Employee Stock Purchase Plan as a compensatory plan and recorded compensation expense of $68,000 and $115,000 for the three months ended September 30, 2012 and 2011 and $242,000 and $195,000 for the six months ended September 30, 2012 and 2011, respectively, in accordance with ASC 718.

The estimated fair value of stock purchase rights granted under the Employee Stock Purchase Plan was estimated at the date of grant using Black-Scholes pricing model with the following weighted average assumptions:

As of September 30, 2012, there was $199,000 of total unrecognized compensation cost related to employee stock purchases. These costs are expected to be recognized over a weighted average period of 0.5 years.

The future realization of tax benefits related to stock-based compensation is dependent upon the timing of employee exercises and future taxable income, among other factors. The Company did not realize any tax benefit from the stock-based compensation charges incurred during the three and six months ended September 30, 2012 and 2011.

No customer represented greater than 10% of the Company's total revenue for the three and six months ended September 30, 2012 or 2011. Revenue from technology licensing and related software and customers outside the United States was not material for the three and six months ended September 30, 2012 or 2011.

12

3. FAIR VALUE MEASUREMENT

The following tables present the Company's fair value hierarchy for assets and liabilities measured at fair value on a recurring basis at September 30, 2012 and March 31, 2012 (in thousands):

13

4. BALANCE SHEET DETAIL

Basic net income per share is computed by dividing net income available to common stockholders (numerator) by the weighted average number of vested, unrestricted common shares outstanding during the period (denominator). Diluted net income per share is computed on the basis of the weighted average number of shares of common stock outstanding plus the effect of dilutive potential common shares outstanding during the period using the treasury stock method. Dilutive potential common shares include shares issuable upon exercise of outstanding stock options and warrants and under the employee stock purchase plan.

The following shares attributable to outstanding stock options and stock purchase rights/restricted stock units were excluded from the calculation of diluted earnings per share because their inclusion would have been anti-dilutive (in thousands):

14

6. INCOME TAXES

For the three and six months ended September 30, 2012, the Company recorded a provision for income taxes of $1.0 million and $6.8 million, respectively, which was primarily attributable to net income from operations, including the gain on patent sale. For the three and six months ended September 30, 2011, the Company recorded accruals for state gross receipt and franchise taxes and released a portion of its valuation allowance against the deferred tax asset as the Company deemed it was more likely than not it would be used to offset the $0.3 million deferred tax liability recorded in connection with the acquisition of Zerigo. During the period ended September 30, 2011 the provision for income taxes was not significant due to the valuation allowance.

At March 31, 2012, there was $2.5 million of unrecognized tax benefits that, if recognized, would have affected the effective tax rate. The Company does not believe that there has been any significant change in the unrecognized tax benefits in the three and six month periods ended September 30, 2012 and does not believe it is reasonably possible that the unrecognized tax benefit will materially change in the next 12 months. To the extent that the unrecognized tax benefits are ultimately recognized they may have an impact on the effective tax rate in future periods.

The Company is subject to taxation in the U.S., California and various other states and foreign jurisdictions in which it has or had a subsidiary or branch operations or it is collecting sales tax. All tax returns from fiscal 1995 to fiscal 2012 may be subject to examination by the Internal Revenue Service, California and various other states. As of October 22, 2012, there were no active federal or state income tax audits. Returns filed in foreign jurisdictions may be subject to examination for the fiscal years 2009 to 2010.

Indemnifications

In the normal course of business, the Company indemnifies other parties, including customers, lessors and parties to other transactions with the Company, with respect to certain matters. Under these arrangements, the Company typically agrees to hold the other party harmless against losses arising from a breach of representations or covenants, intellectual property infringement or other claims made against certain parties. These agreements may limit the time within which an indemnification claim can be made and the amount of the claim. In addition, the Company has entered into indemnification agreements with its officers and directors.

It is not possible to determine the maximum potential amount of the Company's exposure under these indemnification agreements due to the limited history of indemnification claims and the unique facts and circumstances involved in each particular agreement. Historically, payments made by the Company under these agreements have not had a material impact on the Company's operating results, financial position or cash flows. Under some of these agreements, however, the Company's potential indemnification liability might not have a contractual limit.

15

Product Warranties

The Company accrues for the estimated costs that may be incurred under its product warranties upon revenue recognition. Changes in the Company's product warranty liability, which is included in cost of product revenue in the condensed consolidated statements of income were as follows (in thousands):

In the third quarter of fiscal 2010, the Company amended a contract with one of its third party customer support vendors containing a minimum monthly commitment of approximately $430,000. The agreement requires a 150-day notice to terminate. The total remaining obligation under the amended contract is $2.2 million.

The Company entered into contracts with multiple vendors for third party network services that expire on various dates in fiscal 2012 and 2013. At September 30, 2012, future minimum annual payments under these third party network service contracts were as follows (in thousands):

From time to time, the Company may become involved in various legal claims and litigation that arise in the normal course of its operations. While the results of such claims and litigation cannot be predicted with certainty, the Company is not currently aware of any such matters that it believes would have a material adverse effect on its financial position, results of operations or cash flows.

On March 15, 2011, the Company was named as a defendant in a lawsuit, Bear Creek Technologies, Inc. v. 8x8, Inc. et al., along with more than 20 other defendants. On August 17, 2011, the suit against the Company was dismissed without prejudice under Rule 21 of the Federal Rules of Civil Procedure. On August 17, 2011, the Company was sued again by Bear Creek Technologies, Inc. in the United States District Court for the District of Delaware. The Company filed a motion to dismiss the complaint on October 11, 2011. On May 2, 2012, the Judicial Panel on Multidistrict Litigation ordered the suit against the Company and over a dozen related cases, to be coordinated or consolidated for pretrial proceedings. On August 27, 2012, the Court denied several defendants' motions to dismiss the complaint including the Company's. On October 11, 2012, the Company answered the complaint and alleged three counterclaims as well as affirmative defenses. The Company believes it has factual and legal defenses to these claims and intends to litigate the case vigorously. The Company cannot estimate potential liability or expense in this case at this early stage of litigation.

16

On October 25, 2011, the Company was named a defendant in a lawsuit, Klausner Technologies, Inc. v. Oracle Corporation et al., along with 30 other defendants. On November 1, 2011, Klausner dismissed the complaint voluntarily and filed new complaints separating the defendants, including a new complaint against the Company. The Company filed a motion to dismiss the complaint on February 23, 2012, which was granted in part by the Court on September 11, 2012. On September 25, 2012 the plaintiff filed an amended complaint to which the Company responded by filing another motion to dismiss on October 11, 2012. That motion as well as another motion for a change in venue filed by the Company on August 23, 2012 are pending. The Company has not answered the complaint and believes it has meritorious defenses to this lawsuit. The Company intends to defend the case vigorously. The Company cannot estimate potential liability or expense in this case at this early stage of litigation.

From time to time, the Company has received inquiries from a number of state and municipal taxing agencies with respect to the remittance of taxes. The Company collects or has accrued for taxes that it believes are required to be remitted. The amounts that have been remitted have historically been within the accruals established by the Company.

On June 22, 2012, the Company entered into a patent purchase agreement and sold a family of patents to a third party for $12.0 million plus a future payment of up to a maximum of $3.0 million based on future license agreements entered into by the third party purchaser. Under the terms and conditions of the patent purchase agreement, the Company has retained certain limited rights to continue to use the patents. The patent purchase agreement contains representations and warranties customary for transactions of this type.

17

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

FORWARD-LOOKING STATEMENTS

This Management Discussion and Analysis of Financial Condition and Results of Operations contains forward-looking statements within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act. Any statements contained herein that are not statements of historical fact may be deemed to be forward-looking statements. For example, words such as "may," "will," "should," "estimates," "predicts," "potential," "continue," "strategy," "believes," "anticipates," "plans," "expects," "intends," and similar expressions are intended to identify forward-looking statements. You should not place undue reliance on these forward-looking statements. Actual results and trends may differ materially from historical results or those projected in any such forward-looking statements depending on a variety of factors. These factors include, but are not limited to, customer acceptance and demand for our voice over Internet protocol, or VoIP, telephony products and services, the reliability of our services, the prices for our services, customer renewal rates, customer acquisition costs, actions by our competitors, including price reductions for their telephone services, potential federal and state regulatory actions, compliance costs, potential warranty claims and product defects, our needs for and the availability of adequate working capital, our ability to innovate technologically, the timely supply of products by our contract manufacturers, potential future intellectual property infringement claims that could adversely affect our business and operating results, and our ability to retain our listing on the NASDAQ Capital Market. All forward-looking statements included in this report are based on information available to us on the date hereof, and we assume no obligation to update any such forward-looking statements. In addition to those factors discussed elsewhere in this Form 10-Q, see the Risk Factors discussion in Item 1A of our 2012 Form 10-K. 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 update the forward-looking statements to reflect subsequent events or circumstances.

We develop and markets cloud-based business communications services encompassing internally developed Voice over Internet Protocol ("VoIP") technologies. These services enable telephony and video applications as well as web-based conferencing and unified communications capabilities. We also provide managed hosting and cloud-based computing services. As of September 30, 2012, we had approximately 30,500 business customers. Since fiscal 2004, substantially all of our revenue has been generated from the sale, license and provision of VoIP products, services and technology. Prior to fiscal 2003, our focus was on our VoIP semiconductor business.

Our fiscal year ends on March 31 of each calendar year. Each reference to a fiscal year in this report refers to the fiscal year ending March 31 of the calendar year indicated (for example, fiscal 2013 refers to the fiscal year ending March 31, 2013).

No customer represented greater than 10% of our total revenue for the three and six months ended September 30, 2012 and 2011. Revenue from customers outside the United States was not material for the three and six months ended September 30, 2012 or 2011.

The discussion and analysis of our financial condition and results of operations are based upon our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenue and expenses, and related disclosure of assets and liabilities. On an on-going basis, we evaluate our critical accounting policies and estimates. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. Our critical accounting policies and estimates are discussed in our Annual Report on Form 10-K for the fiscal year ended March 31, 2012. As of September 30, 2012, there had been no material changes to our critical accounting policies and estimates.

18

RECENT ACCOUNTING PRONOUNCEMENTS

See Item 1 of Part I, "Financial Statements - Note 2 - Basis of Presentation - Recent Accounting Pronouncements."

We periodically review certain key business metrics, within the context of our articulated performance goals, in order to evaluate the effectiveness of our operational strategies, allocate resources and maximize the financial performance of our business. The selected operating statistics include the following: