Earnings Management in Response to Corporate Tax Rate Changes: Evidence from the 1986 Tax Reform Act
[This study investigates whether accounting earnings of U.S. corporations are managed in response to changes in the statutory corporate income tax rate. The Tax Reform Act of 1986 (TRA) reduced the maximum corporate tax rate from 46 percent to 34 percent. If managers attempt to maximize firm value by minimizing tax costs, this tax rate change would have provided a substantial incentive to defer income. The motivation for this study comes from attempts by previous researchers to identify situations in which incentives to manage earnings exist and to find empirical evidence of such management (Healy 1985; DeAngelo 1986; Liberty and Zimmerman 1986; McNichols and Wilson 1988; Jones 1991; Cahan 1992). Evidence of earnings management is examined by focusing on accounting accruals. As pointed out by Manzon (1992) and Choi et al. (1991), total accruals can be separated into those types of accruals that are not expected to have a significant effect on taxable income (called "non-current accruals," e.g., depreciation) and those types of accruals that are expected to affect taxable income (called "current accruals," e.g., accounts receivable, accrued payables). By knowing exante which types of accruals are most likely to affect tax savings, more powerful tests of tax motivated earnings management are possible. Firms expected to reduce financial statement income to achieve tax savings are large firms, firms with low levels of long-term debt, and firms with high levels of manager ownership. While the reduction in corporate tax rates provided an incentive for managers to decrease financial statement income in the year prior to the effective date of TRA, other incentives might make it costly for managers to do so. For this reason, many firms may choose to forego a current tax savings to avoid reducing financial statement net income. The results of empirical tests report significantly lower current accruals for large firms for the year prior to the tax rate reduction.1 As predicted, these accruals are positively associated with levels of long-term debt. There is no relation between accruals and manager ownership. Accruals for large firms with years ending 30 June are not lower than those of calendar year firms. This study provides evidence of management of financial statement income in response to a large decrease in the statutory corporate tax rate. The results have implications for independent auditors, who face conflicting incentives to (1) provide clients with tax minimization advice, and (2) detect material cases of client earnings management. The results are also expected to be of interest to tax policy decision makers, since the ability of corporate managers to engage in tax rate arbitrage through earnings management can affect revenue estimates, as well as estimates of effects of tax law changes.]