Moving to a new state can be exciting, but it often creates confusion when tax season arrives. One of the most common questions taxpayers ask is, "Which state do I file in?" The answer depends on where you lived during the year, when you moved, and where your income was earned.
The good news is that moving does not usually mean paying tax twice on the same income. However, it often means filing more than one state tax return.
Most Movers File as a Part-Year Resident
If you lived in one state for part of the year and another state for the remainder, you will generally file a part-year resident return in each state.
For example, if you lived in California from January through June and moved to Arizona in July, you would typically file:
- A California part-year resident return.
- An Arizona part-year resident return.
Each state generally taxes the income earned while you were a resident of that state, along with any income sourced to that state.
Which State Is My Resident State?
Many taxpayers assume there is a minimum amount of time they must live in a state before becoming a resident. In most cases, that is not how residency works.
Instead, states generally look at when you established your permanent home, often referred to as your domicile. Factors may include:
- Where you live.
- Where your driver's license is issued.
- Where your vehicle is registered.
- Where you vote.
- Where your family resides.
- Where you intend to make your permanent home.
In many situations, the state where you are living on December 31 is considered your resident state at the end of the tax year. However, if you moved during the year, that does not mean all your income belongs to that state. The income must still be allocated between the states based on when you lived there and where it was earned.
For example, if you moved from California to Arizona on July 15 and established residency in Arizona, Arizona may be your resident state on December 31. However, California may still tax income earned while you lived there during the first half of the year.
A common misconception is that you must live somewhere for six months before becoming a resident. In reality, a permanent move made late in the year can still create part-year residency in your new state.
What Income Belongs to Each State?
Generally, income is assigned based on when it was earned and where you were living at the time.
Examples include:
- Wages earned before your move generally belong to your former state.
- Wages earned after your move generally belong to your new state.
- Interest and dividend income may be allocated based on your residency when the income was received.
- Rental income is generally taxable by the state where the property is located.
If you worked for the same employer before and after your move, your wages may need to be divided between states based on your actual work dates and residency periods.
What If I Worked in One State but Lived in Another?
Some taxpayers move but continue working in their former state. Others live in one state and commute to another.
In these situations, you may need:
- A resident or part-year resident return for the state where you lived.
- A nonresident return for the state where you worked.
Many states provide credits that help prevent the same income from being taxed twice.
Keep Records of Your Move
When states review residency issues, documentation matters.
Consider keeping:
- Lease agreements or home purchase documents.
- Utility bills.
- Driver's license records.
- Vehicle registration documents.
- Change-of-address confirmations.
- Employment records showing where you worked.
- Moving company receipts.
These documents can help establish the date your residency changed.
What About Remote Workers?
Remote work has made state taxation more complicated than ever.
If you moved during the year and worked remotely, taxation may depend on:
- Where you physically performed the work.
- Where your employer is located.
- Whether the state has special remote worker rules.
Because these rules vary significantly between states, remote workers often benefit from additional tax planning.
Common Mistakes After Moving
Some of the most common errors include:
- Filing only in the new state and forgetting the old state.
- Reporting all income to both states.
- Using the wrong residency status.
- Forgetting about state withholding shown on Form W-2.
- Assuming a move automatically changes all income to the new state.
- Believing you must live somewhere for six months before becoming a resident.
The Conclusion
Moving during the year often means filing more than one state tax return. Most taxpayers will file as a part-year resident in both states and allocate income based on where they lived when it was earned.
While the state where you reside on December 31 is often considered your resident state at year-end, income earned before the move may still be taxable to your former state. Understanding when your residency has changed and keeping good records can help ensure your return is filed correctly and that you pay only the tax you owe.
Disclaimer: This article is intended for general informational purposes only and should not be considered tax, legal, or financial advice. State tax laws vary, and individual circumstances can significantly affect filing requirements. Consult a qualified tax professional regarding your specific situation before making any tax-related decisions.