How to Calculate 2024 Wisconsin State Income Tax by Using State Income Tax Table

1. Find your income exemptions 2. Find your pretax deductions, including 401K, flexible account contributions ... 3. Find your gross income 4. Check the 2024 Wisconsin state tax rate and the rules to calculate state income tax 5. Calculate your state income tax step by step 6. If you want to simplify payroll tax calculations, you can download ezPaycheck payroll software, which can calculate federal tax, state tax, Medicare tax, Social Security Tax and other taxes for you automatically. You can try it free for 30 days, with no obligation and no credt card needed. Learn more about the in house payroll tax solution for Wisconsin small businesses here.

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Wisconsin State Tax Tables

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Tax rate used in calculating Wisconsin state tax for year 2024 after April 1

State Abbreviation:	WI
State Tax Withholding State Code:	55
Acceptable Exemption Form:	WT-4
Basis For Withholding:	State Exemptions
Acceptable Exemption Data:	S, M / Number of Exemptions
TSP Deferred:	Yes
Special Coding:	Determine the Total Number Of Allowances field as follows: First Position - Enter the employee's marital status indicated on the WT-4. S=Single and M=Married. Second and Third Positions - Enter the total number of exemptions claimed. If the number is less than 10, precede with a zero.
Additional Information:	None

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Withholding Formula (Wisconsin Effective 2024)

1. Subtract the biweekly Thrift Savings Plan contribution from the gross biweekly wages.
   
   
2. Multiply the adjusted gross biweekly wages times 26 to obtain the annual wages.
   
   
3. Decrease the annual gross earnings by the deduction amount determined from the formula below.
   For single persons:
   — If annual gross earnings are less than $17,780, deduction amount = $6,702.
   — If annual gross earnings are $73,630 or more, deduction amount = $0.
   — If annual gross earnings are at least $17,780 but less than $73,630, deduction amount is obtained by subtracting from $6,702, 12% of annual gross earnings in excess of $17,780, i.e. deduction amount = $6,702 – 0.12 * (Annual gross earnings – $17,780).
   
   For married persons:
   — If annual gross earnings are less than $25,727, deduction amount = $9,461.
   — If annual gross earnings are $73,032 or more, deduction amount = $0.
   — If annual gross earnings are at least $25,727 but less than $73,032, deduction amount is obtained by subtracting from $9,461, 20% of annual gross earnings in excess of $25,727, i.e. deduction amount = $9,461 – 0.20 * (Annual gross earnings – $25,727).
   
4. Apply the taxable income determined in step 2 to the following table to determine the Wisconsin tax withholding.
   
   




Tax Withholding Table
If the Amount of Taxable Income Is:		The Amount of Wisconsin Tax Withholding Should Be:
Over:	But Not Over:				Of Excess Over:
$        0	$   12,760	$    0		3.54%	$         0
12,760	25,520	$    451.70	plus	4.65%	12,760
25,520	280,950	1045.04	plus	5.30%	25,520
280,950	and over	14,582.83	plus	7.65%	280,950


 

5. Divide the annual Wisconsin tax withholding by 26 to obtain the biweekly Wisconsin tax withholding.
   

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