Iowa Personal Tax ExtensionForm IA 1040V

Iowa’s Automatic Personal Income Tax Extension – Unique April 30 Deadline

Iowa provides a fully automatic extension for filing personal income tax returns – no form, no federal extension, and no application needed. The Iowa Department of Revenue extends the filing deadline from April 30, 2026, to November 2, 2026. Both dates are unique to Iowa – plan around them rather than assuming the standard April 15 / October 15 schedule applies.

Iowa’s 90% Payment Requirement

Iowa’s automatic extension covers filing only – not payment. To avoid both the failure-to-file and failure-to-pay penalties, at least 90% of your total Iowa tax liability must be paid by April 30, 2026. You can pay any remaining balance when you file by November 2. Falling short of the 90% threshold triggers both penalties simultaneously.

Using IA 1040V

For mail-in payments, use the IA 1040V (Iowa Income Tax Payment Voucher, Form 41-137). For online payments, visit tax.iowa.gov – free ACH debit is available with no login required.

Late Filing and Payment Penalties

Iowa imposes a 5% failure-to-file penalty and a 5% failure-to-pay penalty on unpaid tax. Both can apply simultaneously if 90% is not paid by April 30 and the return is not filed by November 2.

Best Practices

• ✓Note Iowa’s unique dates: original due April 30, extended deadline November 2.
• ✓Pay at least 90% of your Iowa tax liability by April 30, 2026, to avoid all penalties.
• ✓Use tax.iowa.gov for free ACH debit – no login or registration required.
• ✓No form or application needed – Iowa’s extension is fully automatic.
• ✓File your completed Iowa return by November 2, 2026.

Iowa’s extension is as frictionless as it gets – automatic, no paperwork, no federal dependency. Pay 90% of what you owe by April 30 and file by November 2, and Iowa’s extension works perfectly in your favor.

Quick Reference Table

Mailing Address with Payment