Income Taxes	3 Months Ended
Mar. 31, 2013
Income Taxes
Income Taxes	Note 15—Income Taxes The effective tax rate on income before taxes and noncontrolling interests for the three months ended March 31, 2013 was 37.82%. The effective tax rate for income attributable to Primoris is 38.85%. The rate differs from the U.S. federal statutory rate of 35% due primarily to state income taxes, the “Domestic Production Activity Deduction” and nondeductible meals and incidental per diems common in the construction industry. To determine its quarterly provision for income taxes, the Company uses an estimated annual effective tax rate, which is based on expected annual income, statutory tax rates and tax planning opportunities available in the various jurisdictions in which the Company operates. Certain significant or unusual items are separately recognized in the quarter in which they occur and can be a source of variability in the effective tax rate from quarter to quarter. The Company recognizes interest and penalties related to uncertain tax positions, if any, as an income tax expense. Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences of temporary differences between the financial reporting basis and tax basis of the Company’s assets and liabilities. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. In September 2012, the Internal Revenue Service (“IRS”) concluded an examination of our federal income tax returns for 2008 and 2009, which did not have a material impact on our financial statements. The tax years 2010 through 2011 remain open to examination by the IRS. The statute of limitations of state and foreign jurisdictions vary generally between 3 to 5 years. Accordingly, the tax years 2007 through 2011 generally remain open to examination by the other major taxing jurisdictions in which the Company operates.

Income Taxes

3 Months Ended

Mar. 31, 2013

Note 15—Income Taxes

The effective tax rate on income before taxes and noncontrolling interests for the three months ended March 31, 2013 was 37.82%. The effective tax rate for income attributable to Primoris is 38.85%. The rate differs from the U.S. federal statutory rate of 35% due primarily to state income taxes, the “Domestic Production Activity Deduction” and nondeductible meals and incidental per diems common in the construction industry.

To determine its quarterly provision for income taxes, the Company uses an estimated annual effective tax rate, which is based on expected annual income, statutory tax rates and tax planning opportunities available in the various jurisdictions in which the Company operates. Certain significant or unusual items are separately recognized in the quarter in which they occur and can be a source of variability in the effective tax rate from quarter to quarter. The Company recognizes interest and penalties related to uncertain tax positions, if any, as an income tax expense.

Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences of temporary differences between the financial reporting basis and tax basis of the Company’s assets and liabilities. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date.

In September 2012, the Internal Revenue Service (“IRS”) concluded an examination of our federal income tax returns for 2008 and 2009, which did not have a material impact on our financial statements. The tax years 2010 through 2011 remain open to examination by the IRS. The statute of limitations of state and foreign jurisdictions vary generally between 3 to 5 years. Accordingly, the tax years 2007 through 2011 generally remain open to examination by the other major taxing jurisdictions in which the Company operates.