The IRS on Thursday issued new income tax withholding tables that reflect new tax rates and other changes for individuals implemented by P.L. 115-97, known as the Tax Cuts and Jobs Act, enacted Dec. 22 (Notice 1036). Employers should use the updated withholding rules for 2018, putting them into effect as soon as possible but no later than Feb. 15, the IRS said. Until then, employers should continue to use the 2017 withholding tables.
The IRS noted that many employees should begin to see their take-home pay increase in February depending on how quickly their employers implement the new tables and whether they are paid weekly, biweekly, or monthly. The new withholding tables are designed to work with Forms W-4, Employee’s Withholding Allowance Certificates, that employees already have on file, so employees do not have to fill out new ones at this time. The IRS plans on issuing a new Form W-4 in the near future. It is also working on revising the withholding tax calculator available on its website, which it expects will be finished by the end of February.
According to the IRS, the new tables in Notice 1036 reflect the increase in the standard deduction, the repeal of personal exemptions, and new tax rates and brackets. The new tables are designed to produce the correct amount of tax withholding and are also intended to avoid over- and under-withholding of tax.