Basis of Presentation

3 Months Ended

Mar. 31, 2013

Basis of Presentation

NOTE A – Basis of Presentation

The accompanying unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles (GAAP) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three months ended March 31, 2013 are not necessarily indicative of the results that may be expected for the year ending December 31, 2013. For further information, refer to the consolidated financial statements and footnotes included in PACCAR Inc’s (the Company) Annual Report on Form 10-K for the year ended December 31, 2012.

Earnings per Share: Basic earnings per common share are computed by dividing earnings by the weighted average number of common shares outstanding, plus the effect of any participating securities. Diluted earnings per common share are computed assuming that all potentially dilutive securities are converted into common shares under the treasury stock method. The dilutive and antidilutive options are shown separately in the table below.

Three Months Ended March 31,	2013		2012
Additional shares		800,600		829,500
Antidilutive options		2,384,300		2,571,900

In February 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. This ASU requires disclosure of additional information about reclassification adjustments from other comprehensive income. The ASU is effective for annual periods beginning on or after January 1, 2013 and interim periods within those annual periods. The Company adopted ASU 2013-02 in the first quarter of 2013; the implementation of this amendment resulted in additional disclosures (see note F), but did not have an impact on the Company’s consolidated financial statements.

In January 2013, the FASB issued ASU 2013-01, Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities, an update to ASU 2011-11, Disclosures about Offsetting Assets and Liabilities. The ASUs require entities with derivatives, repurchase agreements and securities borrowing and lending transactions that are either offset on the balance sheet, or subject to a master netting arrangement, to provide expanded disclosures about the nature of the rights of offset. The updated ASU is effective for annual periods beginning on or after January 1, 2013 and interim periods within those annual periods. The Company adopted ASU 2013-01 in the first quarter of 2013; the implementation of this amendment resulted in additional disclosures (see note I), but did not have an impact on the Company’s consolidated financial statements.