Note C: Funds Held for Clients and Corporate Investments

Funds held for clients and corporate investments consisted of the following:

Included in money market securities and other cash equivalents as of August 31, 2012 and May 31, 2012 are short-term municipal bonds, commercial paper, money market funds, Federal Deposit Insurance Corporation (“FDIC”) insured deposit accounts, and other bank demand deposit accounts. Within bank demand deposit accounts for funds held for clients, the Company maintained $19.4 million as of August 31, 2012 and $13.7 million as of May 31, 2012 in a separately designated account for tax obligations of a partner’s clients.

Classification of investments on the Consolidated Balance Sheets is as follows:

The Company’s available-for-sale securities reflected a net unrealized gain of $58.8 million as of August 31, 2012 compared with a net unrealized gain of $59.5 million as of May 31, 2012. Included in the net unrealized gain as of August 31, 2012 and May 31, 2012, respectively, there were 34 and 35 available-for-sale securities in an unrealized loss position. The securities in an unrealized loss position, all of which were in a loss position for less than twelve consecutive months, were as follows:

The Company regularly reviews its investment portfolios to determine if any investment is other-than-temporarily impaired due to changes in credit risk or other potential valuation concerns. The Company believes that the investments it held as of August 31, 2012, that had unrealized losses of $0.4 million, were not other-than-temporarily impaired. The Company believes that it is probable that the principal and interest will be collected in accordance with the contractual terms, and that the unrealized losses on these securities were due to changes in interest rates, and were not due to increased credit risk or other valuation concerns. A substantial portion of the securities in an unrealized loss position as of August 31, 2012 and May 31, 2012 held an AA rating or better. The Company does not intend to sell these investments until the recovery of their amortized cost basis or maturity, and further believes that it is not more-likely-than-not that it will be required to sell these investments prior to that time. The Company’s assessment that an investment is not other-than-temporarily impaired could change in the future due to new developments or changes in the Company’s strategies or assumptions related to any particular investment.

Realized gains and losses on the sales of securities are determined by specific identification of the amortized cost basis of each security. On the Consolidated Statements of Income and Comprehensive Income, realized gains and losses from funds held for clients are included in interest on funds held for clients and realized gains and losses from corporate investments are included in investment income, net. For the three months ended August 31, 2012 and 2011, realized gains were $0.2 million and $0.1 million, respectively, and there were no realized losses.

The amortized cost and fair value of available-for-sale securities that had stated maturities as of August 31, 2012 are shown below by contractual maturity. Expected maturities can differ from contractual maturities because borrowers may have the right to prepay obligations without prepayment penalties.

Variable rate demand notes (“VRDNs”) are primarily categorized as due after five years in the table above as the contractual maturities on these securities are typically 20 to 30 years. Although these securities are issued as long-term securities, they are priced and traded as short-term instruments because of the liquidity provided through the tender feature.