Wisconsin Inheritance Tax: What Heirs and Executors Need to Know in 2026

The most common question Wisconsin executors ask during the first week of settling an estate: "How much inheritance tax do I owe?"

The answer is zero. Wisconsin eliminated its inheritance tax in 1987 and has had no estate tax since 2008. But the situation in 2026 is more complicated than that simple answer suggests — and getting it wrong could cost a high-value estate significantly.

Wisconsin Has No Inheritance Tax

An inheritance tax is levied on the right of an heir to receive property — charged to the beneficiary based on their relationship to the deceased and the size of their share. Wisconsin repealed this tax entirely in 1987 under political pressure from wealthy constituencies, and it has not returned.

This means that when you inherit money, property, or other assets from a Wisconsin resident, you owe no Wisconsin state tax on that inheritance. There is no tax return to file, no withholding to manage, and no threshold to track for inheritance purposes.

Wisconsin Also Has No State Estate Tax — For Now

An estate tax is different from an inheritance tax: it is levied on the total net value of the estate itself before distribution, charged against the estate rather than individual heirs.

Wisconsin's estate tax was tied to a federal mechanism called the "state death tax credit." When the federal government phased out this credit through the Economic Growth and Tax Relief Reconciliation Act of 2001, Wisconsin's estate tax effectively disappeared with it. The state has had no estate tax since December 31, 2007.

For most Wisconsin estates in 2026, this means: no state inheritance tax, no state estate tax, no state-level wealth transfer tax of any kind.

The Threat on the Horizon: Assembly Bill 1029

Here is where the situation gets complicated. Wisconsin lawmakers introduced Assembly Bill 1029 to reintroduce a standalone state estate tax. If enacted as drafted, it would apply to property transfers occurring after October 31, 2026.

The proposed structure would create a tiered tax:

• Estates valued between one-third and two-thirds of the federal exclusion amount: 6.67% rate
• Estates valued between two-thirds and the full federal exclusion amount: 13.33% rate
• Amounts exceeding the federal exclusion amount: 20% rate

The federal estate tax exclusion is approximately $13.6 million per individual in 2026 (subject to annual inflation adjustment). Under AB 1029, Wisconsin would begin taxing estates that exceed approximately $4.5 million — the one-third threshold.

The bill includes a temporary carve-out for qualifying farmland, but that protection expires if the land is sold or converted to non-farm use within a 10-year holding period. For farm families, this creates a significant long-term liability that does not appear on the estate's balance sheet at the time of death.

AB 1029 has not been enacted as of June 2026. But executors and estate planners with high-value estates should monitor its status closely. The enforcement date in the bill — October 31, 2026 — is close enough that estates in administration right now could be affected if the bill passes.

What Taxes DO Apply to a Wisconsin Estate

Even without an estate tax or inheritance tax, there are tax obligations that can delay the estate's closure.

The Fiduciary Income Tax Return (Form 2)

The estate itself is a separate taxable entity from the moment of death. If the estate generates $600 or more in gross income before it closes — from rental income, dividends, interest, capital gains on sold assets — the personal representative must:

1. Obtain an Employer Identification Number (EIN) from the IRS
2. File a Wisconsin Fiduciary Income Tax Return (Form 2) with the Wisconsin Department of Revenue

This applies to income earned by the estate after the date of death, not to the value of assets inherited. A estate that holds a rental property for 8 months while going through probate will almost certainly trigger this requirement.

The Schedule CC Bottleneck

The most significant tax-related delay in Wisconsin probate is not a tax bill — it is a tax clearance requirement.

Before a Wisconsin court will allow the estate to formally close, the personal representative must obtain a Closing Certificate for Fiduciaries from the Wisconsin Department of Revenue. This is requested by filing Schedule CC through the DOR's online portal (tap.revenue.wi.gov).

The DOR takes up to 120 days to process this request. That is four months of mandatory waiting — regardless of how straightforward the estate's tax situation is.

Executors who wait until all other probate work is complete before filing Schedule CC will find themselves stuck in a four-month holding pattern at the very end of the process. File Schedule CC as early as possible. It requires the court-filed inventory, a copy of the will, and up to four years of the decedent's prior tax returns if they had outstanding tax liabilities.

The Decedent's Final Personal Income Tax Return

The personal representative must also file the decedent's final Wisconsin income tax return (Form 1) for the year of death, covering January 1 through the date of death. This is separate from the fiduciary return for the estate.

If a surviving spouse exists, they can file a joint return for the year of death. If not, the personal representative files as the decedent's representative.

What Heirs Do Not Owe

To be direct: if you receive money, property, or other assets as an heir or beneficiary of a Wisconsin estate, you do not owe Wisconsin state tax on that inheritance. The assets you receive have already been through whatever estate-level tax obligations existed (which in 2026 are minimal for most estates).

You may owe federal income tax on certain inherited assets — particularly retirement accounts like IRAs and 401(k)s, where withdrawals are taxed as ordinary income. But that is a federal obligation, not a Wisconsin one.

Inherited real estate and investment accounts receive a step-up in basis to the fair market value at the date of death. This means that if you sell inherited property immediately after receiving it, you generally owe little or no capital gains tax. The step-up is a federal rule, and it applies regardless of Wisconsin's lack of an estate tax.

Practical Steps for Executors in 2026

1. Confirm AB 1029's status before finalizing distribution plans for high-value estates. If the estate is valued above $4.5 million and the bill passes, a new tax obligation could emerge mid-administration.

2. File Schedule CC early — do not wait until the end of probate. The 120-day processing window runs regardless of when other tasks are completed.

3. Obtain an EIN as soon as the estate is opened if you anticipate any income-generating assets during administration.

4. Do not confuse federal estate tax with Wisconsin estate tax. The federal estate tax applies to estates over approximately $13.6 million. The Wisconsin estate tax currently does not exist, though AB 1029 could change that.

The Wisconsin Estate Settlement Guide covers every tax form and filing deadline relevant to Wisconsin executors, including the Schedule CC timeline, the fiduciary income tax return, and how to handle the estate's EIN with the IRS. It also tracks the status of AB 1029 as of publication.

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