Iowa · Standard Mileage Deduction
Standard Mileage Deduction in Iowa (2026)
Deduct 72.5 cents per business mile for 2026 (IRS standard mileage rate) for business use of your vehicle, or deduct actual expenses instead. Iowa has a flat 3.8% income tax, so a Iowa filer's combined marginal rate on the next dollar at $65,573 of income is about 15.8% (12% federal + 3.8% IA).
2026 savings example for Iowa
Planning estimate for a single filer earning $65,573 (Iowa median household income in LevyIO's state dataset) who removes $5,000 from taxable income. Federal tax uses the 2026 IRS brackets after the $16,100 standard deduction; IA tax uses the state brackets in LevyIO's dataset and assumes the state follows the federal treatment.
Estimated total savings
$790
Federal savings
$600
$5,689 → $5,089 · 12% bracket
IA state savings
$190
$1,937 → $1,747 · 3.8% marginal
Combined marginal rate
15.8%
≈ $158 saved per $1,000 deducted
Federal × Iowa marginal rates (2026, single)
Gross-income ranges include the federal standard deduction. The IA column is the state marginal rate at the midpoint of each range. The last column is the tax saved per $1,000 deducted at that combined rate.
| Federal bracket | Gross income (single) | IA marginal | Combined | Per $1,000 |
|---|---|---|---|---|
| 10% | $16,100 - $28,500 | 3.8% | 13.8% | $138 |
| 12% | $28,500 - $66,500 | 3.8% | 15.8% | $158 |
| 22% | $66,500 - $121,800 | 3.8% | 25.8% | $258 |
| 24% | $121,800 - $217,875 | 3.8% | 27.8% | $278 |
| 32% | $217,875 - $272,325 | 3.8% | 35.8% | $358 |
| 35% | $272,325 - $656,700 | 3.8% | 38.8% | $388 |
| 37% | Over $656,700 | 3.8% | 40.8% | $408 |
Eligibility & forms
Self-employed individuals using a vehicle for business; most employees cannot deduct unreimbursed vehicle expenses (limited exceptions such as Armed Forces reservists, qualified performing artists, and fee-basis government officials)
- Log of business miles
- Own or lease the vehicle
- Consistent method choice
Federal forms: Schedule C, Form 2106
Iowa filing notes
Iowa's flat 3.8% is a significant improvement. Federal standard deduction applies. Retirement income exclusions available. Consider high property taxes when evaluating housing.
Common mistakes: Not keeping a mileage log; Mixing personal and business miles.
Frequently asked questions
How much can the Standard Mileage Deduction save a Iowa taxpayer in 2026?
In LevyIO's example, a single filer with $65,573 of income (the Iowa median household income in our state dataset) who removes $5,000 from taxable income saves about $600 in 2026 federal tax (12% marginal bracket) plus about $190 in Iowa tax (3.8% state marginal rate), roughly $790 combined. It is a planning estimate computed from the 2026 IRS brackets and LevyIO's IA bracket data, not a survey figure.
What is the Iowa income tax rate for 2026?
Iowa has a flat 3.8% income tax. The IA standard deduction in LevyIO's dataset is $14,600 single / $29,200 married. Flat 3.8% in 2025 (was progressive to 8.53%). Uses federal standard deduction. Inheritance tax repealed 2025.
Who qualifies for the Standard Mileage Deduction in Iowa?
Self-employed individuals using a vehicle for business; most employees cannot deduct unreimbursed vehicle expenses (limited exceptions such as Armed Forces reservists, qualified performing artists, and fee-basis government officials). The federal rules are the same in every state; the requirements are: Log of business miles; Own or lease the vehicle; Consistent method choice. Iowa filers should confirm on the IA return whether the state follows the federal treatment.
Which forms do I file to claim the Standard Mileage Deduction?
Federal: Schedule C, Form 2106. Iowa: check the Iowa Department of Revenue instructions for the matching state schedule. Common mistakes: Not keeping a mileage log; Mixing personal and business miles.
Standard Mileage Deduction in other states
Sources
Reviewed 2026-09-17. Estimates are educational planning figures computed from the IRS 2026 inflation adjustments and LevyIO's state bracket dataset; they are not tax advice.