Selling, general and administrative expense for the three-month period ended August 31, 2013 remained relatively unchanged from the prior year period.
Interest expense incurred for the three-month period ended August 31, 2013 was $17.4 million. Interest expense incurred for the three-month period ended August 31, 2012 was $17.1 million, of which $9.3 million was capitalized in connection with our Hunter, Texas cement plant expansion project and $7.8 million was expensed.
Income taxes for the interim periods ended August 31, 2013 and 2012 have been included in the accompanying financial statements on the basis of an estimated annual rate. The tax rate differs from the 35% federal statutory corporate rate primarily due to percentage depletion that is tax deductible, state income taxes and valuation allowances against deferred tax assets. The estimated annualized rate for continuing operations is 29.1% for fiscal year 2014 compared to (1.9)% for fiscal year 2013. We made no income tax payments and received no refunds in the three-month period ended August 31, 2013 and 2012.
Certain statements contained in this quarterly report are "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. All statements other than statements of historical fact are forward-looking statements. Forward-looking statements may include the words "may," "will," "estimate," "intend," "continue," "believe," "expect," "plan," "anticipate," and other similar words. Such statements are subject to risks, uncertainties and other factors, which could cause actual results to differ materially from future results expressed or implied by such forward-looking statements. Potential risks and uncertainties include, but are not limited to, the impact of competitive pressures and changing economic and financial conditions on our business, the cyclical and seasonal nature of our business, the level of construction activity in our markets, abnormal periods of inclement weather, unexpected periods of equipment downtime, unexpected operational difficulties, changes in the cost of raw materials, fuel and energy, changes in cost or availability of transportation, changes in interest rates, the timing and amount of federal, state and local funding for infrastructure, delays in announced capacity expansions, ongoing volatility and uncertainty in the capital or credit markets, the impact of environmental laws, regulations and claims, changes in governmental and public policy, and the risks and uncertainties described in our reports on Forms 10-K, 10-Q and 8-K. Forward-looking statements speak only as of the date hereof, and we assume no obligation to publicly update such statements.