Tax rate used in calculating Iowa state tax for year 2017 | State Abbreviation:
| IA | | State Tax Withholding
State Code: | 19 | | Acceptable Exemption
Form: | IA-W4 or W-4 | | Basis For Withholding:
| State Exemptions | | Acceptable Exemption
Data: | 0 / Number of Allowances | | TSP Deferred: | Yes | | Special Coding: | Determine the Total Number
Of Allowances Claimed field as follows: First
Position - Enter 0 (zero). Second
and Third Positions - Enter the number of allowances claimed. | | Additional Information:
| None |
Withholding Formula (Iowa Effective 2017) - Subtract the 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 gross annual wages.
- Multiply the biweekly Federal income tax withholding by 26 to obtain the annual Federal income tax withholding and subtract this amount from the gross annual wages computed in step 4.
- Determine the standard deduction by applying the following guideline and subtract this amount from the result of step 5 to compute the taxable income.
If the Number of
Allowances Claimed Is: | The Standard
Deduction Is: | |
0 or 1
|
$ 1,650
| |
2 or more
|
4,060
| - Apply the taxable income computed in step 6 to the following table to determine the Iowa tax withholding.
Tax Withholding Table | If the Amount of
Taxable Income Is: | The Amount of Iowa
Tax Withholding Should Be: |
Over:
| But Not
Over: | | | | Of Excess
Over: | |
$ 0
|
$ 1,300
|
$ 0.00
|
plus
|
0.36%
|
$ 0
| |
1,300
|
2,600
|
4.68
|
plus
|
0.72%
|
1,300
| |
2,600
|
5,200
|
14.04
|
plus
|
2.43%
|
2,600
| |
5,200
|
11,700
|
77.22
|
plus
|
4.50%
|
5,200
| |
11,700
|
19,500
|
369.72
|
plus
|
6.12%
|
11,700
| |
19,500
|
26,000
|
847.08
|
plus
|
6.48%
|
19,500
| |
26,000
|
39,000
|
1,268.28
|
plus
|
6.80%
|
26,000
| |
39,000
|
58,500
|
2,152.28
|
plus
|
7.92%
|
39,000
| |
58,500
|
and over
|
3,696.68
|
plus
|
8.98%
|
58,500
| - Determine the exemption allowance by applying the following guideline and subtract this amount from the result of step 7 to compute the annual Iowa tax withholding.
Exemption Allowance = $40 x Number of Exemptions - Divide the annual Iowa tax withholding by 26 and round to the nearest dollar to obtain the biweekly Iowa tax withholding.
|
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