Moving to New Mexico

New Mexico has two ways of making you a resident. The first is domicile: the state you consider your permanent home, where you intend to return. The second is a day count: anyone physically present in New Mexico for 185 days or more in the year is a resident for that year, no matter where their domicile is, and only full 24-hour days count. A resident is taxed on all income from everywhere, with a credit on PIT-1 line 20 for income tax paid to another state on the same income. The year you move in or out, you are a part-year or first-year resident, you file the same Form PIT-1 as everyone else, and Schedule PIT-B works out the New Mexico share. A nonresident with New Mexico-source income files the same two forms and pays only on what was earned here. New Mexico has no reciprocal agreement with any state, so wages earned across the line are always taxed by both the state of residence and the state of work, with the credit sorting it out.

The Department’s own summary is short: residents must file if they file a federal return, want New Mexico withholding back, or want a rebate or credit; nonresidents must file if they have a federal filing requirement and any New Mexico-source income; and filing status must match the federal return.

Who is a resident

The 185-day test counts full days. Days spent partly in New Mexico, the day you drive in or out, do not count. The days need not be consecutive, so a winter visitor who comes and goes can cross the line without noticing.

The 185-day rule is what catches people. A retiree who keeps a house in another state but spends October through April in Las Cruces is a New Mexico resident for that year if the full days add up to 185, and a resident is taxed on everything: the pension, the IRA withdrawals, the dividends, and Social Security if AGI is over the exemption line. Domicile does not save them. The only escape is the day count itself, so a snowbird who wants to stay a nonresident keeps a calendar and stays under 185 full days.

Domicile is the other test, and it is about intent shown by conduct. The usual evidence is where you vote, where your driver’s license and vehicles are registered, where your doctors, bank, church and family are, which house you call home on your federal return, and where you spend most of your time. Nobody changes domicile by renting an apartment somewhere else for a year and intending to come back.

The year you move in

You arrive in June intending to stay, and you are still here on December 31. You are a first-year resident. You report your whole year’s income on PIT-1, because the return starts from federal AGI, and then Schedule PIT-B allocates it: the income earned after the move, plus anything New Mexico-source from before it, goes in the New Mexico column, and the rest does not. The New Mexico tax is the tax on the whole year’s income multiplied by the New Mexico share (verify the method). Because the brackets are graduated, this method keeps a mover in the same bracket as a full-year resident with the same total income.

Income that is taxed by the state you left and also appears in your New Mexico column, which can happen with wages earned in that state after you moved here, or with a bonus paid after the move for work done before it, earns the credit for tax paid to another state. Income that PIT-B leaves out of the New Mexico column needs no credit because New Mexico did not tax it.

Four practical points for the arrival year. Your new employer withholds New Mexico tax from the federal Form W-4; New Mexico has no certificate of its own, and if you want extra withheld you ask for a flat additional amount. If you have a pension or IRA withdrawals, ask the payer for New Mexico withholding, because the state taxes them in full. You cannot use the Department’s free Taxpayer Access Point to file your first New Mexico return; the first one goes through software or on paper, and TAP opens to you after that. And if you are self-employed, register for gross receipts tax before you invoice a New Mexico customer: New Mexico has no sales tax, but its gross receipts tax reaches services and is owed by the seller.

The year you move out

You leave in August, give up the house, and are domiciled elsewhere on December 31, having been here fewer than 185 full days. You are a part-year resident. The PIT-1 and PIT-B are the same forms as for an arrival: the New Mexico column holds income earned while you lived here plus New Mexico-source income from the rest of the year. If you left in March after 70 days you are a part-year resident; if you left in September after 240 full days you are a full-year resident for that year under the 185-day rule, and you report everything with a credit for whatever the new state taxed. The date of departure matters, and so does the day count.

Ties left behind are what cause trouble later. A New Mexico driver’s license, a vehicle registered here, a voter registration, a head-of-family property tax exemption still claimed on a house here, or a New Mexico address on a federal return all say you never left. Change them in the move year, and keep the closing statement, the lease and the moving receipts. Income that continues from New Mexico after the move, rent from a house you kept, a New Mexico business, a pension from a New Mexico employer, is treated differently: rent and business income from New Mexico stay New Mexico-source and are taxed here on a nonresident return in later years; a pension earned here is not, because federal law bars any state from taxing the retirement income of a nonresident.

Working across the line

New Mexico has no reciprocal agreement with any state. The rule is the general one: wages are taxed by the state where the work is done and by the state where the worker lives, and the state of residence gives a credit for the tax paid to the state of work.

A New Mexico resident who works in another state reports the wages on PIT-1 and claims a credit on line 20 for the income tax the other state collected on them. The credit is the lowest of three numbers: the New Mexico tax, the tax paid to the other state, and the New Mexico tax on the income taxed by both. A complete copy of the other state’s return must be attached. If the state of work has no income tax, there is nothing to credit and New Mexico taxes the wages in full; a resident of Las Cruces or Hobbs who commutes across the line to a state with no income tax owes New Mexico tax on every dollar, and since that employer usually withholds no state tax, the worker needs estimated payments or a bill in April.

A nonresident who works in New Mexico files PIT-1 with PIT-B, pays New Mexico on the wages earned here, and claims whatever credit the home state allows. New Mexico withholding comes out of the paycheck for work done in New Mexico.

Remote work. New Mexico sources wages to the place where the work is physically done. A New Mexico resident who works from home for an employer in another state earns New Mexico wages, and New Mexico taxes them; the employer should withhold New Mexico tax, and if it will not, the employee makes estimated payments. A nonresident who works from home outside New Mexico for a New Mexico employer earns no New Mexico-source wages, and New Mexico tax should not be withheld. New Mexico has no convenience-of-the-employer rule that would treat an out-of-state remote worker as working here. Days spent in New Mexico at the employer’s office are New Mexico days, and the wages for them are New Mexico-source.

Military

Being stationed in New Mexico on military orders does not make a servicemember a resident, even for 185 days or more, and a New Mexico resident does not lose residency by being stationed elsewhere on orders. A resident servicemember’s active-duty pay is exempt, deducted on Schedule PIT-ADJ. Under federal law a servicemember’s spouse may elect the servicemember’s state of residence for income tax, so a spouse who works in New Mexico while the servicemember is stationed here can choose to be taxed by the home state instead; the election is made on the home state’s and the employer’s paperwork, and New Mexico withholding is then stopped. Military retirement pay of a New Mexico resident is taxed after a $30,000 exemption, covered in New Mexico for retirees.

What moving does to the rest of your taxes

Your house. New Mexico caps the annual increase in a home’s taxable value at 3% while ownership does not change, and the cap resets to market value when the house sells. A buyer therefore pays property tax on a higher value than the seller did, sometimes much higher if the seller owned it for years. Budget from the assessor’s market value, not the seller’s last bill. Apply at the county assessor for the $2,000 head-of-family exemption from taxable value, and at 65 for the valuation freeze if income is under the limit. If you sold a house in the state you left, the federal home-sale exclusion flows through federal AGI, so the excluded gain is not New Mexico income either; gain above the exclusion is taxed here at the regular brackets after the $2,500 capital gain deduction, apportioned on PIT-B by where you lived when it was sold.

Your 529 plan. Only contributions to The Education Plan and Scholar’s Edge, New Mexico’s own plans, are deductible here, with no cap. Contributions to the plan you opened in another state earn nothing on the New Mexico return. New contributions after the move go to a New Mexico plan.

Your estate. New Mexico has no estate tax, no inheritance tax and no gift tax. Nothing in the move year needs to be done on that account.

Your estimated payments. If the move leaves you with income that nobody withholds New Mexico tax on, a pension, rent, a business, cross-border wages, you must pay in quarterly once the New Mexico tax after withholding will be $1,000 or more: April 15, June 15, September 15 and January 15, on Form PIT-ES or through TAP. In the arrival year there is no New Mexico prior-year tax to use as a safe harbor, so the 90%-of-this-year test is the one that applies.