| Business Entity Type | Fiduciaries |
| Filing Status | Approved with Federal |
| Extension Information | * Wisconsin grants your business an automatic 6-month extension provided you have obtained an approved IRS extension. * A copy of the federal extension must be attached to the final Wisconsin return when filed. * The extension is NOT an extension to pay any taxes you may have due. Tax payments are due by the original return due date. |
| Online Payment | Wisconsin | Online Tax Extension Payment |
| State Payment Agency | Wisconsin Department of Revenue |
| Late Filing Penalty | 5% of the amount of the tax due for each month that the failure continues, up to an aggregate of 25%. |
| Late Payment Penalty | State has no specific civil penalty provisions for failure to pay tax (civil penalties may apply for underpayment of estimated taxes or for intent to evade tax). |
| Tax Year | 2024 |
| Payment Voucher | Form 1-ES | Wisconsin Estimated Income Tax Interactive Voucher |
| Mailing Address | Wisconsin Department of Revenue |
| Original Due Date | 15-Apr-25 |
| Extended Due Date | 15-Oct-25 |
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