Moving to New Hampshire: what the state asks, and what the state you left will audit

Nothing in New Hampshire tax law turns on whether a person is a resident for income-tax purposes, because there is no income tax for the status to matter to. There is no form on which to declare the move, no part-year return, no credit for taxes paid to another state, and nothing to credit it against. The work of becoming a New Hampshire resident is therefore work done for someone else’s benefit: the state left behind, which will keep taxing a former resident until it is satisfied that domicile has changed, and which has a definition, a list of factors and an audit program for people who file a last resident return and disappear across the line. The New Hampshire steps, a driver’s license and registration, voter registration, the homestead, are cheap and quick; the former state will weigh them lightly and look instead at where the person actually lives, works, keeps the furniture and spends the days.

New Hampshire does care about residency in three narrower ways. The elderly exemption on the property tax requires three consecutive years of New Hampshire residency before April 1 of the tax year. The state’s DP-8 property tax relief requires that the home be the claimant’s principal residence on April 1. And anyone who was a resident for part of 2024 or an earlier year with more than $2,400 ($4,800 joint) of interest and dividends owed a final Form DP-10 for that year, which repeal did not cancel. Beyond those, the state’s interest in a newcomer ends at the motor vehicle counter.

What New Hampshire asks

A new resident is expected to get a New Hampshire driver’s license and register vehicles here within 60 days of becoming a resident. Registration is done at the town clerk, who collects the town’s permit fee based on the vehicle’s list price and age, and at the state level for the plates. There is no sales or use tax on a vehicle brought in from another state. Voter registration is with the town clerk or supervisors of the checklist, and New Hampshire’s election law defines domicile for voting as the one place a person has established a physical presence and manifests an intent to maintain a single continuous presence for domestic, social and civil purposes (verify statutory text); that definition is as close as the state comes to a general residency test, and it is a reasonable description of what the former state will be looking for too.

The two tax-related dates are April 1 and April 15. April 1 is the assessment date for property tax: ownership and residence on that day decide the year’s bill, the year’s exemptions and the year’s DP-8 claim. April 15 is the deadline for Form PA-29, the permanent application for the elderly exemption, the veterans’ credits and the other town exemptions. A newcomer who closes in June 2026 is assessed as owner for the first time on April 1, 2027, can file a PA-29 by April 15, 2027 for a veterans’ credit, and must wait until April 1, 2029 for the elderly exemption, three years after arriving. Property tax relief in New Hampshire covers each program.

What the former state asks

Every state with an income tax uses two tests, and a person leaving it has to pass both. The first is domicile: the one place a person treats as a permanent home and intends to return to. Domicile does not change until a new one is established with the intent to abandon the old, and the burden of proving the change falls on the person claiming it. The second is a statutory test that catches people who keep a home in the old state and spend too many days there, whatever they call their domicile; in most states that have one the line is 183 days together with a permanent place of abode. A person who sells the old house, buys in New Hampshire and does not go back passes both easily. A person who keeps the old house and splits the year is the one the audit is written for.

The factors auditors weigh are consistent from state to state and are published. The home: which house is larger, more valuable, more used. Time: where the days are spent, with any part of a day counting as a day there and undocumented days scored against the taxpayer. Business: where the person works and where the business is run from. The things “near and dear”: where the art, the heirlooms, the family photographs and the pets are. Family: where the spouse and minor children live. The paperwork, license, voter registration, bank accounts, the address on the will, is on every list and is on every list described as secondary, because anyone can change it in a week. What persuades is the old house sold or rented at arm’s length, the better house here, the doctors and dentist moved, the club resigned, the safe deposit box emptied, and a calendar that shows the center of life has moved north.

The year of the move produces one last return for the old state, a part-year resident return covering income received through the move date and, after it, only income with a source in that state. The move date should be the same on that return, the New Hampshire license, the voter registration and the deed or lease. A move date earlier than the license date invites the question of what the person was waiting for.

Income that follows you, and income that does not

Federal law since 1996 bars any state from taxing the retirement income of a person who is not its resident or domiciliary, with residency decided under that state’s own law. A pension earned over thirty years in another state is untaxed by that state from the day the person stops being its resident, and the same protection covers IRA and 401(k) withdrawals and most deferred compensation paid out over ten years or more. The last clause is the catch: the protection depends on actually ceasing to be a resident under the old state’s rules, which is why the domicile evidence matters in the year of the move.

What does follow a person is income with a source in the old state. Rent from a house kept there, a business still operating there, the gain on property sold there after the move, and wages for days physically worked there remain that state’s to tax on a nonresident return for as long as they last. Wages are where New Hampshire residents feel this most. A New Hampshire resident who commutes to a job in Massachusetts or Maine pays that state’s nonresident income tax on the wages for days worked there, files its nonresident return, and gets no New Hampshire credit, because there is nothing to credit against. Days worked from a New Hampshire home for a Massachusetts employer are not Massachusetts-source wages under Massachusetts’ general sourcing rule now that its pandemic-era telecommuting rule has expired (verify current Massachusetts practice for hybrid schedules), but employers’ withholding often lags the schedule, and the remedy is a Massachusetts nonresident return that apportions the wages by days. A New Hampshire statute, RSA 275:57-a, declares that work performed in New Hampshire by a New Hampshire resident is not taxable by another state; it binds no other state and should not be relied on as a shield. A remote worker for an employer in a state with a convenience-of-the-employer rule faces the harder version: that state may tax the at-home days as its own unless the out-of-state location is the employer’s requirement (verify).

The former-state audit, and the file to keep

A person who files a final resident return in a state with a residency audit program and a New Hampshire address should expect a letter, and a high-income person should expect it within two years. The audit asks for the day count first and the documents behind it second: cell-phone records with tower locations, credit and debit card statements for each family member, toll-transponder and airline records, the insurance rider that says where the jewelry and the art are kept, the moving company’s inventory, the club memberships resigned or kept, where the dog is licensed, where the grandchildren visit. None of this is in New Hampshire’s interest to ask for, and no New Hampshire agency will ever ask for it, which is why newcomers do not keep it. Keep it anyway, from the first week, because carriers and toll authorities purge records on a schedule and an undocumented day is a day in the old state.