Your domicile state has the primary power to tax your estate when you die, and the connection between domicile and estate tax is what determines whether your heirs write a check to a state revenue department or not. Twelve states and the District of Columbia impose their own estate taxes, with exemptions starting as low as $1 million, while the federal exemption for 2026 sits at $15 million per person.1Internal Revenue Service. What’s New — Estate and Gift Tax That gap is where most of the money is lost. Estates that owe nothing federally can still owe six figures to Oregon, Massachusetts, or Washington, and the state that gets to collect is almost always the state where you were domiciled at death.
Domicile Is Not the Same as Residence
A residence is any place you live for a stretch of time. You can have several at once: a condo in the city, a beach house down south, a cabin in the mountains. Domicile is different. It is your one permanent legal home, the place you intend to return to whenever you leave. Every person has exactly one domicile at any given moment, and it does not change until you affirmatively abandon it and establish a new one somewhere else.
That distinction controls which state can tax the full value of your estate. Your domicile state claims authority over all your intangible assets: brokerage accounts, retirement funds, bank deposits, business interests, intellectual property. It does not matter where the bank or brokerage firm is physically located. For most wealthy individuals, financial assets dwarf real estate in total value, so domicile drives the bulk of the estate tax bill.
Real estate and tangible personal property work the opposite way. They are taxed by the state where they physically sit, regardless of your domicile. A Florida domiciliary who owns a vacation home in Vermont can leave an estate that owes Vermont estate tax on that property even though Florida imposes none. The same rule reaches artwork, vehicles, and boats permanently kept in a taxing state.
Which States Impose an Estate Tax
Twelve states and the District of Columbia levy their own estate taxes as of 2026. Exemptions and top rates vary widely:
- Oregon: $1 million exemption; top rate 16%
- Massachusetts: $2 million exemption; top rate 16%
- Washington: roughly $2.2 million exemption; top rate 35%
- Rhode Island: roughly $1.8 million exemption; top rate 16%
- Minnesota: $3 million exemption; top rate 16%
- Illinois: $4 million exemption; top rate 16%
- District of Columbia: roughly $4.7 million exemption; top rate 16%
- Maryland: $5 million exemption; top rate 16%
- Vermont: $5 million exemption; top rate 16%
- Hawaii: roughly $5.5 million exemption; top rate 20%
- Maine: roughly $6.8 million exemption; top rate 12%
- New York: roughly $6.9 million exemption; top rate 16%
- Connecticut: $13.61 million exemption; top rate 12%
Several thresholds are indexed for inflation and shift year to year, so verify the current number before filing. Most of these states tax only the value above the exemption at graduated marginal rates. Oregon does not tax the first $1 million at all; the next $500,000 is taxed at 10%, and rates climb from there. A few states have historically used a cliff structure where exceeding the exemption by even a dollar triggered tax on the entire estate rather than the excess. Massachusetts used that approach before recent changes raised its exemption to $2 million and shifted to a credit-based system. Check whether your state uses a marginal or cliff structure, because the planning implications are very different.
Inheritance Taxes Are a Separate Category
Estate taxes come out of the estate before distribution. Inheritance taxes are paid by the person receiving the assets, and the rate depends on their relationship to the deceased. Five states impose an inheritance tax: Kentucky, Maryland, Nebraska, New Jersey, and Pennsylvania. Iowa phased out its inheritance tax as of January 1, 2025. Maryland is the only state that imposes both.
A surviving spouse almost always pays nothing. Children and grandchildren are either exempt or taxed at low rates. Distant relatives and unrelated beneficiaries face steeper rates. In Pennsylvania, children pay 4.5%, siblings pay 12%, and everyone else pays 15%. In Nebraska, unrelated beneficiaries face an 18% rate after a $25,000 exemption. These taxes apply based on where the deceased was domiciled, not where the beneficiary lives.
How States Test Your Domicile
States take a substance-over-form approach. Filing a declaration of domicile, getting a local driver’s license, and registering to vote are important first steps, but paper changes alone will not settle the question if the rest of your life tells a different story. Tax auditors look at where you actually live, not where you say you live.
Five categories of evidence tend to drive domicile disputes:
- Time spent. How many days you spend in each state, and which state hosts your holidays, birthdays, and family gatherings. Auditors may request cell phone records, credit card statements, and E-ZPass data to reconstruct your movements.
- Homes. The size, value, and condition of your residences. Selling the home in your former state is the strongest signal. Keeping it with year-round pool service and cable running undercuts any claim that you left.
- Business connections. Where your active business ties are. Passive investments like rental property do not create ties the way an office or professional practice does.
- Family. Where your spouse and minor children live. Auditors generally assume married couples share a domicile, so a claim that you moved to Florida while your spouse stayed in New York faces serious skepticism.
- Possessions. Where you keep items with sentimental value: heirlooms, artwork, pets. Personal attachment matters more here than financial value.
The overall question is whether your new location has genuinely replaced the former one as the center of your life. Estates that cannot align these factors face aggressive residency audits from the old state’s revenue department.
The 183-Day Statutory Residency Trap
Many states treat anyone who maintains a permanent place of abode in the state and spends more than 183 days there as a “statutory resident” for income tax purposes. Any part of a day counts as a full day.
Statutory residency primarily affects income tax, not estate tax directly. Estate tax follows domicile. But the day-counting evidence a state gathers during an income tax audit builds the same factual record it will use to challenge your domicile after death. If New York has been taxing you as a statutory resident for years because you spend 200 days a year in your Manhattan apartment, it will have a strong argument that you were domiciled there when you die, regardless of what your Florida driver’s license says. Keep a contemporaneous log of where you sleep each night, and be honest about whether your lifestyle actually matches the domicile you are claiming.
How to Change Your Domicile
Changing domicile requires two things: physically moving to the new state and genuinely intending to stay there. Neither alone is enough. You cannot change domicile by filing paperwork from your old state, and you cannot establish it by moving temporarily with plans to return.
The practical checklist:
- Sell or downgrade your former home. This is the single most persuasive act. If you keep the old residence, the new one should be clearly larger, more valuable, or more central to your daily life.
- Get a new driver’s license and surrender the old one. Register your vehicles in the new state.
- Register to vote in the new state and actually vote there.
- File a declaration of domicile in your new county if your state offers that option.
- Move your professional relationships: doctors, dentists, lawyers, accountants, financial advisors.
- File your federal tax return using the IRS processing center for your new state and your new address.
- Give up residency-based benefits in your former state, including homestead exemptions, resident parking permits, and resident hunting or fishing licenses.
- Move personal possessions with sentimental value: family photos, heirlooms, pets. Keep shipping receipts as proof.
- Update your estate planning documents to reference the new state as your domicile.
- Center your social life in the new location. Join local organizations, attend a local place of worship, host family gatherings at the new home.
None of these steps individually proves anything. Auditors look at the whole picture. The people who get caught are the ones who check every box on paper while still living their actual life in the old state. If your spouse stays behind, your closest friends are all in the former city, and you fly out of the old airport every time you travel, no declaration of domicile is going to save your estate from a tax bill.
When Two States Both Claim You
Dual domicile disputes happen more often than people expect. A retired couple splits the year between Connecticut and Florida, keeps homes in both, and never formally cuts ties with the old state. After one spouse dies, Connecticut’s revenue department reviews the final tax return, notices the Florida address, and opens an audit. Florida has no estate tax and no incentive to fight. Connecticut has every reason to claim the decedent was still domiciled there.
The burden of proof falls on the estate. Your executor has to assemble travel logs, credit card records, cell phone location data, and documentation of every domicile factor. If the case cannot be resolved administratively, states sometimes negotiate a settlement splitting the tax, but that outcome is not guaranteed, and the estate pays legal fees on top of whatever tax is owed.
The U.S. Supreme Court has recognized that double taxation by two states claiming the same domicile raises due process concerns, but it has never created a binding mechanism forcing states to resolve conflicts. As a practical matter, the estate has to fight its way out. Most claims fall apart because the deceased never made a clean break and left too many ties in the old state.
Married Couples and the State Exemption Gap
Federal law lets a surviving spouse inherit the deceased spouse’s unused estate tax exemption, a feature called portability. If one spouse dies in 2026 having used none of the $15 million federal exemption, the survivor can carry over that amount and shield $30 million from federal estate tax.1Internal Revenue Service. What’s New — Estate and Gift Tax Claiming portability requires filing a federal estate tax return (Form 706) even when no tax is owed.
Most states with estate taxes do not offer portability. If you are domiciled in a state with a $2 million exemption and your spouse dies first without using any of it, that exemption is generally lost. The survivor gets only their own $2 million exemption, not $4 million. Married couples in estate tax states often plan around this gap using a bypass trust that shelters assets up to the state exemption at the first spouse’s death. Getting this wrong can cost an estate hundreds of thousands of dollars in state taxes that proper planning would have eliminated.
The unlimited marital deduction, which allows spouses to transfer unlimited assets to each other tax-free, applies at both the federal and state level. But it only defers the tax, because everything ends up in the surviving spouse’s estate. Without portability at the state level, deferral without trust planning means paying state estate tax on a larger pile at the second death.