Iowa Income Tax Rate 2018 - 2019

Iowa state income tax rate table for the 2018 - 2019 filing season has nine income tax brackets with IA tax rates of 0.36%, 0.72%, 2.43%, 4.5%, 6.12%, 6.48%, 6.8%, 7.92% and 8.98% for Single, Married Filing Jointly, Married Filing Separately, and Head of Household statuses. The Iowa tax rate is unchanged from last year, however, the income tax brackets have increased due to an inflation adjustment.

Iowa income tax rate and tax brackets shown in the table below are based on income earned between January 1, 2018 through December 31, 2018. Outlook for the 2019 Iowa income tax rate is to remain unchanged with income tax brackets increasing due to the annual inflation adjustment.

Single Tax BracketsTax Rate 2018
Source: 2018 Iowa Interest Rates and Tax Brackets, published by the Iowa Department of Revenue.
$0to$1,5980.36%
$1,599to$3,1960.72%
$3,197to$6,3922.43%
$6,393to$14,3824.5%
$14,383to$23,9706.12%
$23,971to$31,9606.48%
$31,961to$47,9406.8%
$47,941to$71,9107.92%
$71,911to8.98%
Married Filing Jointly BracketsTax Rate 2018
Source: 2018 Iowa Interest Rates and Tax Brackets, published by the Iowa Department of Revenue.
$0to$1,5980.36%
$1,599to$3,1960.72%
$3,197to$6,3922.43%
$6,393to$14,3824.5%
$14,383to$23,9706.12%
$23,971to$31,9606.48%
$31,961to$47,9406.8%
$47,941to$71,9107.92%
$71,911to8.98%
Married Filing Separately BracketsTax Rate 2018
Source: 2018 Iowa Interest Rates and Tax Brackets, published by the Iowa Department of Revenue.
$0to$1,5980.36%
$1,599to$3,1960.72%
$3,197to$6,3922.43%
$6,393to$14,3824.5%
$14,383to$23,9706.12%
$23,971to$31,9606.48%
$31,961to$47,9406.8%
$47,941to$71,9107.92%
$71,911to8.98%
Head of Household BracketsTax Rate 2018
Source: 2018 Iowa Interest Rates and Tax Brackets, published by the Iowa Department of Revenue.
$0to$1,5980.36%
$1,599to$3,1960.72%
$3,197to$6,3922.43%
$6,393to$14,3824.5%
$14,383to$23,9706.12%
$23,971to$31,9606.48%
$31,961to$47,9406.8%
$47,941to$71,9107.92%
$71,911to8.98%

Please reference the Iowa tax forms and instructions booklet published by the Iowa Department of Revenue to determine if you owe state income tax or are due a state income tax refund. Iowa income tax forms are generally published at the end of each calendar year, which will include any last minute 2018 - 2019 legislative changes to the IA tax rate or tax brackets. The Iowa income tax rate tables and tax brackets shown on this web page are for illustration purposes only.

Iowa Tax Brackets 2018 - 2019

Looking at the tax rate and tax brackets shown in the tables above for Iowa, we can see that Iowa collects individual income taxes similarly for Single and Married filing statuses, for example. We can also see the progressive nature of Iowa state income tax rates from the lowest IA tax rate bracket of 0.36% to the highest IA tax rate bracket of 8.98%.

For single taxpayers living and working in the state of Iowa:

  • Tax rate of 0.36% on the first $1,598 of taxable income.
  • Tax rate of 0.72% on taxable income between $1,599 and $3,196.
  • Tax rate of 2.43% on taxable income between $3,197 and $6,392.
  • Tax rate of 4.5% on taxable income between $6,393 and $14,382.
  • Tax rate of 6.12% on taxable income between $14,383 and $23,970.
  • Tax rate of 6.48% on taxable income between $23,971 and $31,960.
  • Tax rate of 6.8% on taxable income between $31,961 and $47,940.
  • Tax rate of 7.92% on taxable income between $47,941 and $71,910.
  • Tax rate of 8.98% on taxable income over $71,910.

For married taxpayers living and working in the state of Iowa:

  • Tax rate of 0.36% on the first $1,598 of taxable income.
  • Tax rate of 0.72% on taxable income between $1,599 and $3,196.
  • Tax rate of 2.43% on taxable income between $3,197 and $6,392.
  • Tax rate of 4.5% on taxable income between $6,393 and $14,382.
  • Tax rate of 6.12% on taxable income between $14,383 and $23,970.
  • Tax rate of 6.48% on taxable income between $23,971 and $31,960.
  • Tax rate of 6.8% on taxable income between $31,961 and $47,940.
  • Tax rate of 7.92% on taxable income between $47,941 and $71,910.
  • Tax rate of 8.98% on taxable income over $71,910.

For the Single, Married Filing Jointly, Married Filing Separately, and Head of Household filing statuses, the IA tax rates remain the same. Notice also that the Single, Married Filing Jointly, Married Filing Separately, and Head of Household income tax brackets are all the same in the state of Iowa.

Last updated: October 14, 2018