Maryland Nonresident Tax Rules and Filing Requirements

Working in Maryland does not automatically make someone a Maryland resident, but income earned from Maryland sources can still create a state tax filing obligation. The rules depend on where a person lived, where the work was performed, what type of income was received, and whether a reciprocity agreement applies. Understanding Maryland’s nonresident tax rules can help taxpayers determine whether to file, which return to use, and how to report income correctly.

Who Is a Maryland Nonresident?

A Maryland nonresident is generally someone who was not a Maryland resident during the tax year but received income from Maryland sources. A person’s residence is based on facts such as domicile—the permanent home the person intends to keep—and, in some cases, the amount of time spent in Maryland and the location of a principal home.

Someone may be a Maryland resident even when temporarily living elsewhere if Maryland remains their domicile. Conversely, owning property or working in Maryland does not, by itself, establish residency. Taxpayers who moved into or out of Maryland during the year are generally part-year residents and usually use a different return from full-year nonresidents.

Maryland residency and federal tax residency are separate questions. A taxpayer should review Maryland’s definitions and return instructions rather than assume that a federal filing status determines state residency.

What Counts as Maryland-Source Income?

Maryland generally taxes a nonresident on income attributable to Maryland sources, not on all income earned nationwide. The source of income depends on the type of work or payment and the facts surrounding it.

• Wages and salary: Compensation is generally Maryland-source to the extent the employee performs services physically in Maryland. Work performed outside the state may be treated differently, including when an employee works remotely.
• Business income: Income from a trade or business carried on in Maryland may be taxable to the extent it is connected to Maryland activities. Apportionment rules can apply when business operations span multiple states.
• Rental income: Rent from real property located in Maryland is generally Maryland-source, even if the owner lives elsewhere.
• Property gains: Gains from selling Maryland real estate may be subject to Maryland tax and withholding requirements.
• Other income: Partnerships, S corporations, trusts, and other pass-through entities may report Maryland-source income to nonresident owners. The appropriate treatment depends on the income and entity.

For employees, the physical location where services are performed is a key factor. A Maryland employer does not necessarily make all of an employee’s wages Maryland-source if the employee works outside Maryland. However, remote-work arrangements can raise sourcing and employer-withholding questions, so taxpayers should keep work-location records and check current Maryland guidance.

Maryland Nonresident Tax Rates and Local Tax

Maryland income tax has a state component and a local component for residents. Nonresidents generally do not pay a Maryland county or Baltimore City income tax as a resident would. Instead, Maryland imposes a 2.25% nonresident tax on Maryland taxable income, in addition to the applicable state income tax. The nonresident tax is designed to take the place of the local income tax that applies to residents.

The state income tax is progressive, so the applicable state tax depends on taxable income and filing status. Tax rates, brackets, credits, and instructions can change. A nonresident should use the rates and calculation method for the specific tax year rather than relying on a prior-year estimate.

The 2.25% nonresident tax is not a flat tax on every dollar of total income. It is calculated under Maryland’s nonresident-return rules using Maryland taxable income. The return also determines what portion of deductions, exemptions, and credits is allowable. The exact calculation can be more involved than multiplying gross Maryland wages by 2.25%.

Which Maryland Tax Return Should a Nonresident File?

A full-year nonresident who must file generally uses Form 505, Maryland Nonresident Income Tax Return. The return reports Maryland-source income and calculates the Maryland tax and nonresident tax. The taxpayer may also need to complete the related nonresident income allocation or supporting schedules required by the current instructions.

A person who lived in Maryland for only part of the year generally uses Form 502, Maryland’s resident return, and completes the applicable part-year allocation information. The return separates income received while a Maryland resident from income treated as Maryland-source during the nonresident portion of the year. If residency status is unclear, the taxpayer should consult Maryland’s instructions or a tax professional before choosing a form.

Maryland’s filing requirement depends on income, filing status, age, dependency status, and other circumstances. There is no single threshold that applies to every taxpayer. A nonresident should check the current Maryland filing instructions even when federal filing requirements do not seem to require a return.

When Does a Nonresident Need to File?

A nonresident may need to file if Maryland-source income meets the applicable filing threshold or if another filing rule applies. Filing may also be useful when Maryland tax was withheld from pay and the taxpayer expects a refund. In some situations, a return is needed to claim a credit or reconcile withholding with the final tax liability.

Maryland withholding is not the same as a final tax assessment. An employer may withhold state tax based on payroll information, but the return determines the amount actually owed. A taxpayer who had too much withheld may be eligible for a refund; a taxpayer who had too little withheld may owe additional tax and possibly interest or penalties.

Taxpayers should verify whether a filing obligation exists using the instructions for the relevant year. They should not assume that a small amount of Maryland work, no withholding, or a federal filing exemption automatically removes the state filing requirement.

Reciprocity Agreements and Maryland Wages

Maryland has income tax reciprocity agreements with the District of Columbia, Pennsylvania, Virginia, and West Virginia. In general, these agreements provide that wages earned in Maryland by a resident of a reciprocal jurisdiction are taxed by the worker’s state or district of residence rather than Maryland, provided the income and circumstances qualify.

Reciprocity typically applies to employee compensation, not every type of income. A Maryland rental property, business income, or other Maryland-source income may still require a Maryland return even if the taxpayer lives in a reciprocal jurisdiction. The agreement also does not make the taxpayer’s home state’s tax rules disappear.

Eligible employees can generally submit Form MW 507, Maryland’s employee withholding exemption certificate for residents of reciprocal states, to their employer. This helps prevent Maryland income tax withholding on qualifying wages. Employees should confirm eligibility and provide the form to payroll; if Maryland tax was withheld, they may need to file a Maryland return to request a refund.

Reciprocity is based on qualifying residence and income, not simply on working for an employer located across a state line. Taxpayers should confirm that their home jurisdiction is covered and that their compensation falls within the agreement.

Remote Work and Workdays in Maryland

Remote and hybrid work can make wage sourcing less obvious. A nonresident who performs services from a home outside Maryland may have a different Maryland-source wage amount than a nonresident who performs some or all services at a Maryland worksite. The employer’s location alone does not settle every sourcing question.

Employees should keep a contemporaneous record of work locations and workdays, especially when they regularly move between a Maryland office and an out-of-state home. Useful records include calendars, time sheets, travel records, employer policies, and payroll statements. If an employer reports all wages as Maryland income but the employee believes some services were performed elsewhere, documentation can support the allocation reported on the return.

Special rules or factual circumstances may affect the result, including employer convenience policies, temporary assignments, and the nature of the services. Because state treatment can be fact-specific, taxpayers with substantial remote work should check current Maryland guidance or obtain professional advice.

Withholding, Estimated Payments, and Credits

Maryland employers generally withhold state income tax from wages when required. A nonresident who expects to owe tax on Maryland income not subject to sufficient withholding—such as business or rental income—may need to make estimated payments. Underpayment rules and payment deadlines depend on the tax year and the taxpayer’s circumstances.

When a nonresident pays income tax to more than one state on the same income, the taxpayer may be eligible for a credit in the state of residence. The credit is generally governed by the home state’s rules and is not automatic. The taxpayer may need to file both a Maryland nonresident return and a resident return in the home state, then claim the credit using the other state’s tax calculation and supporting documents.

A credit for taxes paid to another state should not be confused with Maryland’s nonresident tax. Maryland determines its tax on Maryland-source income; the taxpayer’s resident state decides whether and how to provide relief from double taxation.

Common Maryland Nonresident Filing Mistakes

• Reporting all income as Maryland income: A nonresident generally reports only income sourced to Maryland, subject to the return’s allocation rules.
• Ignoring Maryland workdays: Employees who work in multiple states should document where services were performed and allocate wages accurately.
• Assuming reciprocity covers every income type: Reciprocal agreements generally concern qualifying wages, not all Maryland-source income.
• Using the wrong return: Full-year nonresidents generally use Form 505, while part-year residents generally use Form 502 with allocation information.
• Treating withholding as the final bill: The return reconciles withholding with the actual tax and may show a refund or balance due.
• Missing documentation: Wage statements, work-location records, business schedules, and proof of tax payments can support reported allocations and credits.

Maryland Nonresident Tax Filing Checklist

1. Confirm whether the taxpayer was a full-year resident, part-year resident, or nonresident under Maryland rules.
2. Identify income connected to Maryland, including wages, business income, rental income, and property gains.
3. Check whether a reciprocity agreement applies to qualifying wages and submit Form MW 507 to payroll when appropriate.
4. Review the current-year Form 505 or Form 502 instructions and determine whether a return is required.
5. Gather W-2s, 1099s, employer work-location records, income allocation details, and proof of any estimated payments.
6. Check withholding, estimated tax, available credits, payment deadlines, and electronic filing options for the applicable tax year.

Where to Find Official Maryland Tax Guidance

The Maryland Comptroller’s website provides current individual income tax forms, instructions, filing information, and guidance on nonresident returns and reciprocal agreements. Taxpayers should use the official forms and instructions for the tax year being filed because rates, thresholds, and procedures can change.

Official resources include the Maryland Comptroller’s individual income tax page, the Maryland tax forms and instructions, and the Comptroller’s information on income tax withholding. For a complex residency, remote-work, or multistate income situation, a tax professional familiar with Maryland law can help interpret the rules.