Tax rate used in calculating Idaho state tax for year 2019State Abbreviation: | ID | State Tax Withholding State Code: | 16 | Acceptable Exemption Form: | W-4 | Basis For Withholding: | State or Federal Exemptions | Acceptable Exemption Data: | S, M / Number of Exemptions | TSP Deferred: | Yes | Special Coding: | None | Additional Information: | If a state income tax certificate has not been processed or if a valid state exemption code is not present, the Federal exemptions will be used in the computation of state tax. |
Withholding Formula >(Idaho Effective 2019)<- Subtract the nontaxable biweekly Thrift Savings Plan contribution from the gross biweekly wages.
- Subtract the nontaxable biweekly Federal Health Benefits Plan payment(s) (includes flexible spending account - health care and dependent care deductions) from the amount computed in step 1.
- Add the taxable biweekly fringe benefits (taxable life insurance, etc.) to the amount computed in step 2 to obtain the adjusted gross biweekly wages.
- Multiply the adjusted gross biweekly wages times 26 to obtain the annual wages.
- Determine the exemption allowance by applying the following guideline and subtract this amount from the annual wages to compute the taxable income.
Exemption Allowance = >$2,960< x Number of Exemptions
- Apply the taxable income computed in step 5 to the following table to determine the annual Idaho tax withholding.
Tax Withholding Table
Single | If the Amount of
Taxable Income Is: | The Amount of Idaho
Tax Withholding Should Be: |
Over:
| But Not
Over: | | | | Of Excess
Over: | | $ 0 | $ >12,000 | $ 0.00 | plus | 0.0% | $ 0 | | 12,000 | 13,504 | 0.00 | plus | 1.125% | >12,000 | | 13,504 | 15,008 | 17.00 | plus | 3.125% | 13,504 | | 15,008 | 16,511 | 64.00 | plus | 3.625% | 15,008 | | 16,511 | 18,015 | 118.00 | plus | 4.625% | 16,511 | | 18,015 | 19,519 | 188.00 | plus | 5.625% | 18,015 | | 19,519 | 23,279 | 273.00 | plus | 6.625% | 19,519 | | 23,279 | and over | 522.00 | plus | 6.925% | 23,279 |
Married | If the Amount of
Taxable Income Is: | The Amount of Idaho
Tax Withholding Should Be: |
Over:
| But Not
Over: | | | | Of Excess
Over: | | $ 0 | $ >24,000 | $ 0.00 | plus | 0.0% | $ 0 | | 24,000 | 27,008 | 0.00 | plus | 1.125% | >24,000 | | 27,008 | 30,016 | 34.00 | plus | 3.125% | 27,008 | | 30,016 | 33,022 | 128.00 | plus | 3.625% | 30,016 | | 33,022 | 36,030 | 237.00 | plus | 4.625% | 33,022 | | 36,030 | 39,038 | 376.00 | plus | 5.625% | 36,030 | | 39,038 | 46,558 | 545.00 | plus | 6.625% | 39,038 | | 46,558 | and over | 1043.00 | plus | 6.925% | 46,558 |
- Divide the annual Idaho tax withholding by 26 and round to the nearest dollar to obtain the biweekly Idaho tax withholding.
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