Federal estate tax gets most of the attention in estate planning conversations, and understandably so given the potential tax exposure it creates for high-net-worth individuals. What receives considerably less attention is the parallel system of state inheritance and estate taxes that applies in a meaningful number of states, often at lower exemption thresholds than the federal system and with tax rates that can significantly affect the wealth transferred to the next generation.
Understanding state inheritance and estate taxes and how they interact with federal estate planning is essential for anyone with significant assets. Where you live and where you hold your assets matters more than most people realize.
1. State Estate Taxes and Inheritance Taxes Are Not the Same Thing
This distinction is the foundation of understanding how state inheritance and estate taxes work, and confusing the two leads to planning errors that are expensive to correct. An estate tax is imposed on the overall value of a deceased individual’s assets before the estate distributes them to the beneficiaries. The estate pays the tax, and the amount owed depends on the estate’s total value relative to the applicable exemption threshold.
An inheritance tax is levied on the beneficiaries who receive assets from an estate rather than on the estate itself. The amount owed depends on the value each beneficiary receives and, in most states that impose inheritance taxes, on the beneficiary’s relationship to the deceased. Spouses are typically exempt from inheritance tax in every state that imposes it. Children and direct descendants receive more favorable treatment than more distant relatives or unrelated beneficiaries in most inheritance tax systems.
Some states impose only an estate tax. Some impose only an inheritance tax. A small number impose both. Most states impose neither. Understanding which category applies in your state of residence is the starting point for state inheritance and estate tax planning.
2. Which States Currently Impose Inheritance Taxes, Estate Taxes, or Both?
The landscape of state inheritance and estate taxes is specific enough that you should always verify planning decisions against current law, as state legislatures periodically modify exemption thresholds and tax rates. As of current law, the states that impose estate taxes include Connecticut, Hawaii, Illinois, Maine, Maryland, Massachusetts, Minnesota, New York, Oregon, Rhode Island, Vermont, Washington, and the District of Columbia. Exemption thresholds and tax rates vary considerably across these jurisdictions, with some states taxing estates above one million dollars and others setting exemptions closer to the federal level.
The states that currently impose inheritance taxes include Iowa, Kentucky, Maryland, Nebraska, New Jersey, and Pennsylvania. Maryland is the only state that imposes both an estate tax and an inheritance tax, creating a dual exposure for Maryland residents with taxable estates. Tax rates and exemption structures vary by state and by the beneficiary’s relationship to the deceased.
Creative Planning’s detailed resource on states with inheritance and estate taxes provides current information on the specific exemption thresholds, tax rates, and filing requirements applicable in each state, which is essential reference material for anyone whose estate planning needs to account for state-level tax exposure.
3. State Exemption Thresholds Are Often Much Lower Than the Federal Exemption
The federal estate tax exemption currently stands at a comparatively high level, keeping most estates outside the scope of federal estate tax. State inheritance and estate taxes, however, can apply at much lower thresholds, bringing a significantly broader population of estates into taxable territory at the state level even when federal estate tax does not apply.
Massachusetts and Oregon, for example, impose estate tax on estates above one million dollars, a threshold that captures many middle-class estates in high-property-value markets where a primary residence alone may represent a significant portion of that exemption. Washington state’s exemption is set at a somewhat higher threshold but still well below the federal level. The practical implication is that individuals and families who have concluded they do not have a federal estate tax problem may have a significant state estate tax problem that their planning has not addressed.
The gap between the federal and state exemption levels is where state-specific estate planning adds the most value, and planning focused exclusively on federal tax exposure misses it entirely.
4. The State Where You Are Domiciled Determines Which State Estate Tax Applies to You
Domicile, the state that is your permanent legal home, determines which state’s estate tax applies to your estate at death. Establishing domicile in a state with no estate tax eliminates state estate tax exposure for most assets, a financial motivation that drives high-net-worth individuals to relocate from high-tax states to states like Florida, Texas, Nevada, and other no-tax jurisdictions.
The domicile determination is not simply a matter of moving and updating your driver’s license. States with significant estate tax revenue scrutinize domicile claims, particularly when a high-net-worth individual maintains connections to the original state through property ownership, business interests, club memberships, and time spent in the state. Establishing domicile convincingly requires demonstrating a genuine intention to make the new state your permanent home through actions beyond administrative steps like changing your address.
Real property located in a state with an estate tax may be subject to that state’s estate tax regardless of where the owner is domiciled, which is a dimension of state inheritance and estate tax planning that cross-state property ownership creates.
5. Portability Does Not Apply to State Estate Taxes
Federal estate tax provisions allow a surviving spouse to use the unused exemption amount from their deceased spouse through a rule called portability. This can enable married couples to preserve both exemptions without necessarily establishing a trust at the first spouse’s death. This portability election has simplified federal estate tax planning for many married couples.
State estate tax portability is a different matter. Most states that impose estate taxes do not offer portability of the state exemption between spouses. This means that a married couple in a state without portability who does not use planning structures to capture both spouses’ state exemptions may lose one exemption entirely, creating state estate tax exposure at the second death that proper planning would have prevented.
Credit shelter trusts, which fund a trust at the first death with assets up to the state exemption amount and hold those assets outside the surviving spouse’s taxable estate, remain an important planning tool for married couples in states without portability even when they are no longer necessary for federal estate tax purposes. The continued relevance of these structures for state inheritance and estate tax planning is frequently overlooked by advisors and clients who focus primarily on federal estate tax.
6. Inheritance Tax Rates Vary Dramatically Based on Beneficiary Relationship
In states that impose inheritance taxes, the tax rate applied to inherited assets depends heavily on how closely related the beneficiary is to the deceased. The most favorable treatment is typically reserved for spouses, who are exempt from inheritance tax in every state that imposes it, and for direct descendants, including children and grandchildren, who face lower rates or higher exemption amounts than more distant relatives.
Siblings, nieces, nephews, and other extended family members generally face higher inheritance tax rates in many states. Unrelated beneficiaries, including unmarried partners not recognized as spouses under state law, face the highest rates in most inheritance tax states and, in some cases, rates that consume a significant portion of what they inherit.
The inheritance tax implications of leaving assets to unrelated beneficiaries or more distant relatives are significant enough to factor into estate planning decisions about the structure of bequests, the use of trusts that may change the tax treatment of transfers, and the relative tax efficiency of different transfer strategies for different categories of beneficiaries.
7. Irrevocable Trusts Can Reduce State Estate Tax Exposure When Structured Correctly
The planning tools available to reduce state inheritance and estate tax exposure include many of the same structures used for federal estate tax planning, applied to the specific exemption thresholds and tax rates of the applicable state. Irrevocable life insurance trusts that hold life insurance outside the taxable estate, grantor retained annuity trusts that transfer appreciation out of the estate at reduced gift tax cost, and qualified personal residence trusts that remove the primary residence from the taxable estate at a discounted value are all strategies that reduce state estate tax exposure when implemented with sufficient planning lead time.
The interaction between state and federal estate tax planning structures requires coordination that ensures strategies implemented for one purpose do not create unintended consequences for the other. A trust structure that efficiently removes assets from the federal taxable estate may or may not achieve the same result for state estate tax purposes, depending on how the state’s tax law treats the specific trust structure; state-specific analysis is required rather than assuming federal planning conclusions translate directly to state outcomes.
8. Regular Review of State Tax Law Is Essential Because It Changes
The state inheritance and estate tax landscape is not static. State legislatures periodically modify exemption thresholds, adjust tax rates, add or eliminate taxes, and change the rules governing how specific asset types and trust structures are treated. An estate plan that was optimized for the state tax law in effect when it was created may be suboptimal or even counterproductive under law that has subsequently changed.
Several states have increased their estate tax exemptions in recent years in response to the federal exemption increases and competitive pressure from no-tax states that attract wealthy residents. Others have maintained low exemptions or increased rates. The direction of change is not uniform or predictable based on general political trends, so periodic review of state tax law is an ongoing planning requirement rather than a one-time analysis.
An annual review of the state tax implications of an existing estate plan, particularly after any change in residence, significant change in asset values, or change in state law, ensures the plan reflects current law and circumstances rather than assumptions that may no longer be accurate.
Final Thoughts
State inheritance and estate taxes can create significant tax exposure even when an estate falls below the federal estate tax threshold. Differences in state exemptions, tax rates, beneficiary relationships, domicile rules, and portability provisions make state-specific planning an important part of managing and transferring substantial wealth.
High-net-worth individuals should review their domicile, where their real estate and other assets are located, and how their estate planning structures interact with applicable state laws. Because state tax rules can change, regular reviews with qualified estate planning and tax professionals can help ensure that an estate plan continues to reflect current laws, asset values, and family circumstances.
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