The Inflation Reduction Act ("IRA") was enacted in August 2022. The IRA imposes a 15% alternative minimum tax on corporations whose average annual adjusted financial statement income during the most recently completed three-year period exceeds $1.0 billion. We do not fall within the “applicable corporations” category and are therefore exempt from paying an alternative minimum tax.

Tax Provision

The provision for income tax benefit (expense) for the periods indicated was as follows:

GAAP treats Texas margins tax as a business tax imposed on an entity’s gross profit rather than its net income, like an income tax for financial reporting purposes.

Effective Tax Rate

Our effective tax rate was as follows:

Our effective tax rate differed from the U.S. federal statutory rate primarily due to changes in the valuation allowance related to anticipated utilization of the net deferred tax assets and state income taxes.

Deferred income taxes as of the dates indicated consisted of the following:

Deferred Income Taxes

Balances for deferred income tax represent the effects of temporary differences between carrying amounts and the actual income tax basis of our assets and liabilities; the balances also reflect NOL carryforwards. We record the balances based on tax rates we expect to be in effect when paid. NOL carryforwards and deferred tax assets represent amounts available to reduce future taxable income.

Valuation Allowance.  As of each reporting date, management considers new evidence, both positive and negative, to determine the realizability of deferred tax assets.  This assessment (of whether there is more than a 50% probability that our deferred tax asset is realizable) depends on the generation of future taxable income before the expiration of any NOL carryforwards. During the year ended December 31, 2023, the valuation allowance was reduced to zero based upon the expected utilization of the net deferred tax asset as a result of positive evidence that was evaluated, including recent earnings history and expectations for future taxable income.

At  December 31, 2023 and 2022, there were no uncertain tax positions for which a reserve or liability was necessary. 

NOL Carryforwards

Under IRC Section 382, a corporation that undergoes an “ownership change” is subject to limitations on using pre-change NOL carryforwards to offset future taxable income. Within the meaning of IRC Section 382, an “ownership change” occurs when the aggregate stock ownership of stockholders who own more than 5% (after applying certain look-through rules) increases by more than fifty percent [50% over such stockholders’ lowest percentage ownership during the testing period (generally three years)]. Based on the tax rule, ownership changes occurred in 2005 and 2012. The 2005 ownership change related to a series of private placements; the 2012 ownership change related to a reverse acquisition.

The 2005 and 2012 ownership changes limit the use of pre-change NOL carryforwards to offset future taxable income. The annual use limitation generally equals the value of the common stock, on an aggregate basis, when the ownership change occurred multiplied by a specified tax-exempt interest rate. The 2012 ownership change will subject approximately $16.3 million in NOL carryforwards generated before the ownership change to an annual use limitation of roughly $0.6 million per year. We may use any unused portions of the limitation in subsequent years. Because of the yearly restriction, approximately $6.7 million in NOL carryforwards generated before the 2012 ownership change will expire unused and are excluded in the NOL carryforward presented below. NOL carryforwards generated after the 2012 ownership change but before 2018 are not subject to an annual use limitation; we can use these NOL carryforwards for 20 years in addition to NOL carryforward amounts generated before the ownership change. NOL carryforwards generated beginning in 2018 may only be used to offset 80% of taxable income and are carried forward indefinitely.

NOL carryforwards that remained available for future use for the periods indicated were as follows (amounts shown are net of NOLs that will expire unused because of the IRC Section 382 limitation):