Wisconsin Personal Tax Extension 2026: 2025 Tax-Year Filing Guide
Individual Income Tax · Wisconsin Form 1
This guide explains the Wisconsin personal tax extension for the 2025 tax year. Most individuals receive an automatic extension to October 15, 2026, but payment is still due by April 15, 2026. For federal filing details, see our federal tax extension resources.
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Wisconsin filing extension. Use a federal extension provision for Wisconsin and attach Form 4868 or a statement to your Wisconsin return. Pay Wisconsin tax by April 15, 2026.
Wisconsin Personal Tax Extension: Filing Details
Wisconsin generally grants an automatic six-month extension for individual income tax returns. The extended filing deadline for a 2025 calendar-year return is October 15, 2026.
The extension applies to filing time only. Pay any balance due by April 15 to limit penalties and interest.
Quick Reference: Deadlines and Forms
Use this summary to confirm Wisconsin personal filing deadlines, return forms, and payment requirements.
| Item | Wisconsin personal return | Deadline or method |
|---|---|---|
| Original deadline | 2025 Wisconsin return | April 15, 2026 |
| Extended deadline | Automatic extension | October 15, 2026 |
| Return forms | Form 1 | Use the form for your filing status |
| Payment form | Form 1-ES | Payment remains due April 15 |
Frequently Asked Questions
Answers about Wisconsin personal tax extensions. Confirm current rules with the Wisconsin Department of Revenue.
Visit Wisconsin DOR →Most individuals receive an automatic Wisconsin extension and do not need to submit a separate extension form. The extension moves the filing deadline to October 15, 2026, but payment remains due April 15, 2026. For business filings, see our Wisconsin business tax extension page.
Use Form 1 based on your filing status and residency. The Wisconsin Department of Revenue instructions for each form explain who should use it.
No. Wisconsin tax is due by April 15, 2026. Pay through My Wisconsin Taxes or use the applicable payment method to limit penalties and interest.
For most 2025 calendar-year individual returns, the Wisconsin extended filing deadline is October 15, 2026. Check the current Wisconsin DOR individual filing guidance if your circumstances differ.