This article discusses personal income tax in Idaho.
If you are a resident or nonresident of Idaho and receive taxable income individually from property owned or business transacted in Idaho, you are subject to tax on net income. Therefore, if you are operating your business as an S corporation, partnership, limited liability company, or sole proprietorship, you will be subject to a personal income tax on your business income that passes through to you.
The following rates are applicable for Single and Married Filing Separately for the 2012 tax year.
| Taxable Income | Amount of Tax |
| $0 to $1,380 | 1.6% of taxable income |
| $1,380 to $2,760 | $22.08, plus 3.6% of the amount over $1,380 |
| $2,760 to $4,140 | $71.76, plus 4.1% of the amount over $2,760 |
| $4,140 to $5,520 | $128.34, plus 5.1% of the amount over $4,140 |
| $5,520 to $6,900 | $198.72, plus 6.1% of the amount over $5,520 |
| $6,900 to $10,350 | $282.90, plus 7.1% of the amount over $6,900 |
| $10,035 and over | $527.85, plus 7.4% of the amount over $10,350 |
The following rates are applicable for Married Filing Jointly, Head of Household and Surviving Spouse for the 2012 tax year.
| Taxable Income | Amount of Tax |
| $0 to $2,760 | 1.6% of taxable income |
| $2,760 to $5,520 | $44.16, plus 3.6% of the amount over $2,760 |
| $5,520 to $8,280 | $143.52, plus 4.1% of the amount over $5,520 |
| $8,280 to $11,040 | $256.68, plus 5.1% of the amount over $8,820 |
| $11,040 to $13,800 | $397.44, plus 6.1% of the amount over $11,040 |
| $13,800 to $20,700 | $565.80, plus 7.1% of the amount over $13,800 |
| $20,700 and over | $1,055.70, plus 7.4% of the amount over $20,700 |