Note 16. Income taxes

U.S. GAAP requires that the interim period tax provision be determined as follows:

•

At the end of each quarter, Woodward estimates the tax that will be provided for the current fiscal year stated as a percentage of estimated "ordinary income". The term ordinary income refers to earnings from continuing operations before income taxes, excluding significant unusual or infrequently occurring items.

The estimated annual effective rate is applied to the year to date ordinary income at the end of each quarter to compute the estimated year to date tax applicable to ordinary income. The tax expense or benefit related to ordinary income in each quarter is the difference between the most recent year to date and the prior quarter year to date computations.

•

The tax effects of significant unusual or infrequently occurring items are recognized as discrete items in the interim period in which the events occur. The impact of changes in tax laws or rates on deferred tax amounts, the effects of changes in judgment about beginning of the year valuation allowances, and changes in tax reserves resulting from the finalization of tax audits or reviews are examples of significant unusual or infrequently occurring items that are recognized as discrete items in the interim period in which the event occurs.

The determination of the annual effective tax rate is based upon a number of significant estimates and judgments, including the estimated annual pretax income of Woodward in each tax jurisdiction in which it operates, and the development of tax planning strategies during the year. In addition, as a global commercial enterprise, Woodward's tax expense can be impacted by changes in tax rates or laws, the finalization of tax audits and reviews, as well as other factors that cannot be predicted with certainty. As such, there can be significant volatility in interim tax provisions.

The following table sets forth the tax expense and the effective tax rate for Woodward's income from operations:


	Three-Months Ending
	December 31,
	2011			2010

Earnings before income taxes	$	40,176		$	31,475
Income tax expense		11,760			9,076
Effective tax rate		29.3	%		28.8	%

Income taxes for the three-months ending December 31, 2010 included an expense reduction of $1,890 related to the retroactive extension of the U.S. research and experimentation tax credit.

Worldwide unrecognized tax benefits were as follows:


	December 31,		September 30,
	2011		2011

Gross liability	$	17,470	$	16,931
Amount that would impact Woodward's effective tax rate, if recognized, net of expected offsetting adjustments		14,606		14,078

At this time, Woodward estimates that it is reasonably possible that the liability for unrecognized tax benefits will decrease by as much as $642 in the next twelve months due to the completion of reviews by tax authorities and the expiration of certain statutes of limitations.

Woodward recognizes interest and penalties related to unrecognized tax benefits in tax expense. Woodward had accrued interest and penalties of the following:


	December 31,		September 30,
	2011		2011

Accured interest and penalties	$	2,164	$	1,989

Woodward's tax returns are audited by U.S., state, and foreign tax authorities, and these audits are at various stages of completion at any given time. Fiscal years remaining open to examination in significant foreign jurisdictions include 2004 and forward. Woodward has been subject to U.S. Federal income tax examinations for fiscal years through 2008. Woodward is subject to U.S. state income tax examinations for fiscal years 2007 and forward.