Iowa Standard Deduction (2026 & 2027 Guide)

For 2026 & 2027, Iowa no longer uses its own separate state standard deduction.

Instead, Iowa now follows the federal standard deduction amounts based on your filing status.

Iowa Standard Deduction Amounts

• Single or Married Filing Separately → $15,750
• Married Filing Jointly → $31,500
• Head of Household → $23,625

These are the same amounts used on your federal tax return.

How the Iowa Standard Deduction Works

The standard deduction reduces the amount of income subject to Iowa’s flat state tax.

Beginning in 2025, Iowa will use a flat tax rate of 3.8% on taxable income.

Example: If you earn $80,000 as a single filer, subtract the $15,750 standard deduction first. This leaves $64,250 of taxable Iowa income. At a 3.8% tax rate, your estimated Iowa tax would be about $2,441.50.

Iowa Flat Tax Rate

Unlike previous years, Iowa now has a single flat tax rate.

• All taxable income → 3.8%

This makes Iowa’s tax system much easier to calculate.

Standard Deduction vs Itemized Deductions

Iowa now generally follows your federal deduction choice.

• If you take the federal standard deduction, Iowa uses that
• If you itemize federally, Iowa generally follows that as well

This keeps state and federal filing more consistent.

Why This Matters

The shift to a flat tax and federal deduction alignment simplifies filing for most taxpayers and often lowers state tax liability compared to prior years.

Electronic Filing Recommendation 💻

• Use tax software to automatically apply Iowa’s standard deduction
• Verify your federal filing status matches your Iowa return
• E-file to reduce errors and speed up refunds

Summary

Iowa uses the federal standard deduction amounts: $15,750 for single filers, $31,500 for joint filers, and $23,625 for head of household.

Iowa also now applies a flat 3.8% tax rate, making state tax calculations much simpler.