Starting Feb. 15, 2018, employers must use new tables to determine how much income tax to withhold from their employees’ paychecks. The Internal Revenue Service (IRS) issued the required new tables, in Notice 1036, on Jan. 9, 2018. The notice contains early release copies of the “Percentage Method Tables for Income Tax Withholding” that will appear in IRS Publication 15 (Employer’s Tax Guide).

According to the IRS, Notice 1036 is the first in a series of steps that the agency will take to help employers improve the accuracy of their tax withholdings under changes made by a new tax reform law, the Tax Cuts and Jobs Act, enacted on Dec. 22, 2017.

New Tables Work with Existing Forms W-4 for 2018

The new tables in Notice 1036 are designed to work with the Forms W-4 that employees have already filed with their employers to claim withholding allowances for 2018. Thus, employers do not need to obtain updated Forms W-4 from their employees to start using the new tables.

For 2019, however, the IRS is revising Form W-4 to more fully reflect the new law and to help individuals determine whether to adjust their withholding. Once released, the revised Form W-4 can be used in 2018 by employees starting a new job and by existing employees who wish to update their withholding in response to the new law or changes in their personal circumstances. Until the revised Form W-4 is released, employees and employers should continue to use the 2017 Form W-4.

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