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How to Calculate 2018 Ohio 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 2018 Ohio 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 Ohio small businesses here.
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Ohio State Tax Tables


Ohio State tax rate changed on Sep 1, 2013. Learn more here.


Tax rate used in calculating Ohio state tax for year 2018

State Abbreviation:

OH

State Tax Withholding State Code:

39

Acceptable Exemption Form:

IT-4

Basis For Withholding:

State Exemptions

Acceptable Exemption Data:

0 / Number of Exemptions

TSP Deferred:

Yes

Special Coding:

Determine the Total Number Of Allowances field as follows: First Position- Enter 0 (zero). Second and Third Positions - Enter the total number of exemptions claimed.

Additional Information:

None
Ohio Effective

Need a Better Way to Calculate Ohio State Income Tax Withholdings?

Click here to view the step by step guide on
How to Calculate Ohio State Income Tax Withholdings Automatically

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  • Withholding Formula >(Ohio Effective 2018)<
    1. Subtract the nontaxable biweekly Thrift Savings Plan contribution from the gross biweekly wages.

    2. Subtract the nontaxable biweekly Federal Health Benefits Plan payment(s) (includes dental and vision insurance program, and flexible spending account - health care and dependent care deductions) from the amount computed in step 1.

    3. Add the taxable biweekly fringe benefits (taxable life insurance, etc.) to the amount computed in step 2 to obtain the adjusted gross biweekly wages.

    4. Multiply the adjusted gross biweekly wages times 26 to obtain the annual wages.

    5. Determine the exemption allowance by applying the following guideline and subtract this amount from the gross annual wages to compute the taxable income.

      Exemption Allowance = $650 x Number of Exemptions

    6. Apply the taxable income computed in step 3 to the following table to determine the Ohio tax withholding.

    7. Tax Withholding Table

      If the Amount of
      Taxable Income Is:

      The Amount of Ohio
      Tax Withholding Should Be:


      Over:

      But Not
      Over:

      Of Excess
      Over:

      $        0  $ 5,000 $          0 plus >0.556% $         0
          5,000   10,000        27.80 plus 1.112%      5,000
         10,000   15,000      83.40 plus 2.226%    10,000
         15,000   20,000      194.70 plus 2.871%    15,000
         20,000   40,000      333.80 plus 3.338%    20,000
         40,000   80,000   1,001.40 plus 3.894%    40,000
         80,000  100,000   2,559.00 plus 4.451%    80,000
       100,000  and over  3,449.20 plus 5.563%<  100,000

    8. Divide the annual Ohio tax withholding by 26 to obtain the biweekly Ohio tax withholding.
     

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