Income Taxes

3 Months Ended

Mar. 31, 2022

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

We recorded a benefit for income taxes of $2.1 million and $2.2 million for the three months ended March 31, 2022 and 2021, respectively. The effective tax rate was 20.9% and 39.3% for the three months ended March 31, 2022 and 2021, respectively.

The decrease in the effective tax rate for the three months ended March 31, 2022 compared with the three months ended March 31, 2021 is primarily attributable to a decrease in pre-tax book income, nondeductible permanent items, and a windfall for the three months ended March 31, 2021 compared to a shortfall for the three months ended March 31, 2022. Our effective tax rate for the three months ended March 31, 2022 is similar to the federal statutory tax rate of 21%, but the difference consists primarily of research and development credits offset by non-deductible expenses and shortfall from share-based compensation. Our effective tax rate for the three months ended March 31, 2021 differed from the federal statutory tax rate of 21% primarily due to research and development credits, non-deductible expenses, and windfall from share-based compensation.

For the year ending December 31, 2022, we estimate a research and development tax credit of $2.7 million, net of tax reserves. We record the tax benefit, net of tax reserves, as a deferred tax asset. For the year ended December 31, 2021, we recognized research and development tax credits of $4.3 million, net of tax reserves.