Part-Year and Non-Resident Returns Compared

The year somebody moves is the year their tax filing stops being routine. Two states are involved, the forms are different from the ones used before, and the choices made on them establish a residency position that may be examined later.

The two forms

Part-year resident. Filed by someone who was a resident of the state for part of the year, reporting income received during residency plus income sourced there afterward.

Non-resident. Filed by someone never resident in the state, reporting only income sourced to it — wages for work performed there, rent from property there, business income apportioned there.

Resident. The ordinary return, reporting worldwide income, with credit for tax paid elsewhere as described in credit for tax paid to another state.

A move produces two part-year returns. One in each state, covering the respective periods.

Cross-border work produces one of each. A resident return at home and a non-resident return where the work was performed.

Allocating income

By receipt, in general. Income is assigned to the period in which it was received, which handles most wages, interest and dividends.

By where the work was done, for wages. Days worked in each state allocate the earnings, independently of where the employer or the employee is based.

By date of sale, for gains. Which makes the timing of a disposition relative to a move consequential, as examined in selling a business and the state that taxes the gain.

By service period, sometimes. Bonuses, deferred compensation and equity awards relate to work performed over a period, and states allocate them differently.

And by apportionment, for business income. Using the state's own formula rather than any timing rule.

The mechanics

Establish the residency dates first. Everything else follows from when residency began and ended, and the underlying question is domicile, examined in what a domicile audit examines.

Prepare the non-resident return before the resident one. Because the credit on the resident return depends on the tax computed elsewhere.

Expect deductions to be prorated. By period or by income ratio, depending on the state's method.

Reconcile the two returns. The income reported across both should account for the year without gaps or duplication that neither state relieves.

And check withholding against the outcome. Employers frequently continue withholding to the old state after a move, producing a refund in one and a liability in the other.

The recurring errors

Filing a full-year resident return in the new state. Which overstates that state's claim and, more importantly, concedes a residency start date that may be wrong.

Ignoring the old state entirely. A person who has left still owes tax on income sourced there and on the pre-move period.

Treating the move date as the pay date. Wages for work performed before a move but paid after it are frequently allocated to the earlier state.

Missing sourced income after the move. Rental income from a retained property is the most common example and the most commonly overlooked.

And claiming full deductions on a part-year return. Which produces an assessment and, occasionally, a wider examination of the residency position.

Using the return well

Treat it as a residency statement. The dates claimed are a position the taxpayer will be held to, and they should match the underlying facts.

Keep supporting records for the move. Closing documents, moving invoices, utility connections and registration changes, filed with the return year's papers.

Document the day count. Which supports the allocation and also addresses the separate test in statutory residency and how days are counted.

Deal with one-off income deliberately. Where a sale, a bonus or a vesting event falls near the move, its treatment should be decided rather than defaulted.

And file both returns, on time, consistently. Inconsistency between the two is what draws attention, and it is entirely avoidable.

The year of a move is also the year in which most residency examinations originate, because the change in filing pattern is what a state notices. That makes the returns worth more attention than their arithmetic alone would justify: they are the first formal statement of a position that may be tested, and the supporting evidence is easiest to assemble in the same weeks the return is being prepared.

It also makes consistency across documents important. A return claiming residency from a particular date sits alongside a driver's license issued on another, a voter registration on a third, and a lease starting on a fourth. Small discrepancies are ordinary and explainable; a pattern of dates that do not correspond to the claimed move suggests the move was assembled rather than made.

For people who move regularly — for work, or between two homes on a settled seasonal pattern — the same analysis has to be run each year, and the answer is not necessarily the same each time. A pattern that produced non-resident filings for several years can tip into part-year or full residency without any deliberate change, simply through a shift in how time was spent.

The general point is that these forms record decisions rather than merely reporting numbers. Which state a person was resident in, from when, and where each item of income belongs are all determinations being made on the return. Made carefully, with records behind them, they close the year. Made by default, they leave a position that somebody else may reopen.

A few specific items cause more trouble than the rest and are worth handling explicitly. Equity compensation is the leading one: options granted while resident in one state, vesting over a period spanning a move, and exercised after it. Most states allocate the income by reference to the work period the award covered, which means a portion belongs to the old state years after the person left. Employers frequently do not track this, so the allocation falls to the individual.

Retirement distributions are the opposite case and are more favorable than people expect. A federal statute prevents a state from taxing certain pension and qualified plan income received by someone who is no longer a resident, which removes a claim the old state might otherwise have asserted. The protection is specific in scope and does not extend to every kind of deferred payment, so it should be checked against the particular arrangement rather than assumed.

Rental property left behind is the most commonly missed item. It produces income sourced to the old state indefinitely, requiring a non-resident return there every year, and it is forgotten precisely because the owner has stopped thinking about that state. Where the property is later sold, the gain is taxed there too, which brings the analysis in selling a business and the state that taxes the gain into play for what the owner regards as a personal asset rather than a business one.