23 December 2021 2022 state income tax and supplemental withholding rates (preliminary as of December 22, 2021) To assist you in reviewing your state income tax withholding rates for 2022, beginning on the following page is a chart of the most recent income tax withholding tables published by states and US territories and the supplemental withholding rate if allowed. Like the federal supplemental income tax withholding rate, states/territories may also allow for an optional flat percentage of income tax withholding for wages that are in addition to regular pay. Where allowed, the supplemental rate greatly simplifies income tax withholding calculations on irregular payments such as bonuses, equity compensation and separation pay. Employers may optionally use a federal flat rate of income tax federal withholding of 22% on supplemental wages up to $1 million for the year; however, a mandatory flat rate of 37% applies to supplemental wages over $1 million. Note that the flat 37% rate applies even if an employee has submitted a federal Form W-4 claiming exemption from federal income tax withholding. (IRS Reg. Section 31.3402(g)-1.) The state supplemental income tax withholding rates currently available for 2021 are shown in the chart below. The chart also shows if the state has a flat tax rate, meaning only one rate of tax applies regardless of the wages paid, or alternatively, the highest marginal withholding rate according to the state's latest computer withholding formula.
The supplemental withholding rate is 5%. (Withholding Tax Tables and Instructions for Employers and Withholding Agents, p. 3.) Effective January 1, 2021, the highest marginal tax rate is 4.5% plus a 3.5% surcharge on income exceeding $250,000 ($500,000 for married and head of household). (Arizona Rev. Stat. Ann. 43-1011.) Under SB 1828 and effective January 1, 2022, the law createsa two-tier individual income tax rate structure of 2.55% and 2.98% depending on filing status and taxable income and, if general fund revenue thresholds are met, a reduced two-tier individual income tax rate structure of 2.53% and 2.75% or a 2.5% tax rate beginning in 2023. The supplemental withholding rate is 5.9%. (Arkansas Department of Finance and Administration, Withholding Tax, p. 4.) The supplemental withholding rate is 10.23% on bonuses and stock options and 6.6% on other types of compensation (e.g., overtime pay, commissions, sales awards, and vacation pay). (2022 California Employer's Guide, p. 15.) There is no supplemental rate of withholding. (Connecticut Employer's Tax Guide, p. 12.) The supplemental rate of withholding is 6.5%. (Idaho State Tax Commission, Computing Withholding.) The supplemental rate of withholding is 6%. (Iowa Withholding Tax Information.) The supplemental rate of withholding is 5.0%. (Kansas Withholding Tax Guide, p.8.) The supplemental rate of withholding is 5.0%. (Maine Withholding Tables for Individual Income Tax, p.4.) The supplemental rate of withholding is 6.25%. (Minnesota Income Tax Withholding, Instruction Booklet and Tax Tables, p.7.) The supplemental rate of withholding is 5.3%. (2022 Missouri Withholding Tax Formula, p.1.) The highest withholding rate is 6.6% and the supplemental rate of withholding is 6%. (Withholding Tax Guide with Montana Withholding Tax Tables, p.2.) Under SB 159, and effective January 1, 2022, the top marginal income tax rate is reduced from 6.9% to 6.75%. The supplemental withholding rate is 5%. (2022 Nebraska Circular EN, p.9.) The supplemental withholding rate is 5.9%. (FYI-104, New Mexico Withholding Tax, p.4.) The supplemental withholding rate is 1.84%. (2022 North Dakota Income Tax Withholding Rates & Instructions, p.58.) The supplemental withholding rate is 3.5%. (Ohio Administrative Code 5703-7-10, rev. 11-23-2018.) The supplemental withholding rate is the highest withholding rate. (Okla. Admin. Code Section 710:90-1-6.) The supplemental withholding rate is 8%. (Oregon Withholding Tax Formulas, p.3.) The supplemental withholding rate is 5.99%. (Rhode Island Employer's Income Tax Withholding Tables, p.6.) The supplemental withholding rate is 30% of federal income tax withheld. (Vermont Income Tax Withholding Instructions, Tables and Charts, p.3.) The supplemental withholding rate is 5.75%. (Virginia Income Tax Withholding Guide For Employers, p.10.) The supplemental withholding method is explained in the Wisconsin Withholding Tax Guide, p.24.
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