Maryland Tax Residency Rules

Maryland Tax Residency Overview

Maryland has a highly active tax residency audit program, driven by a combined state and local personal income tax rate that can exceed 8.9% (local county taxes add up to 3.2% on top of the state’s 5.75% bracket). If you are deemed a Maryland resident, you are taxed on your worldwide income. Nonresidents are taxed only on income derived from Maryland sources.

Under the Maryland Tax-General Article (§ 10-101(k)) and Code of Maryland Regulations (COMAR 03.04.02.01B), an individual is considered a resident of Maryland if they satisfy either of the following two tests:

• The Domicile Test: The individual is domiciled in Maryland on the last day of the taxable year.
• The Statutory Residency Test (183-Day Rule): The individual maintains a place of abode in Maryland for more than six months of the taxable year and is physically present in the state for 183 days or more during that taxable year.

1. Domicile in Maryland

Your domicile is defined by Maryland courts as your true, fixed, permanent home and principal establishment—the place to which you intend to return whenever you are absent. You can have multiple residences, but you can only have one domicile at any given time. Once established, your Maryland domicile continues until you abandon it and successfully establish a new one elsewhere.

According to the Comptroller's Administrative Release No. 37, a change of domicile is a question of intent supported by consistent physical actions. The Comptroller evaluates a "facts and circumstances" test looking at these five primary categories:

1. Home: The location, size, and value of all residences owned or rented. If you buy a massive mansion in Florida but retain your primary family home in Maryland, the state will argue your domicile never changed.
2. Time: Where and how you spend your time during the tax year.
3. Items Near and Dear: The location of items with significant sentimental value, family heirlooms, collections of valuables, and family pets.
4. Active Business Involvement: Where you earn your living, your active involvement in business ownerships, and the location of your professional practices.
5. Family Connections: Where your spouse and minor children reside, and where your children attend school.

Critical Indicator: The Comptroller places heavy emphasis on two primary administrative ties: where you actually live and where you are registered to vote.

2. The Statutory Residency Test (183-Day Rule)

You can be treated as a Maryland tax resident even if your permanent home (domicile) is in another state (like Florida or Texas) if you satisfy the statutory residency criteria. This is a two-pronged test that requires you to meet both conditions simultaneously:

1. You must maintain a place of abode (a residence) in Maryland for more than six months of the taxable year.
2. You must be physically present in Maryland for 183 days or more during that taxable year.

Because both prongs must be satisfied, simply owning property or a vacation home in Maryland does not make you a resident unless you also meet the 183-day physical presence threshold.

3. How Maryland Counts Days: The 24-Hour Rule

One of the most common points of confusion in tax residency audits is how days are counted toward the 183-day threshold. Maryland operates under a hybrid rule of calendar days and continuous periods:

• Any Part of a Day Counts: As a baseline, presence in Maryland for any portion of a calendar day (even an hour) counts as one full day of physical presence.
• The 24-Hour Continuous Period Exception: To prevent unfair double-counting of a single overnight trip, Maryland regulations provide that "a continuous period of 24 hours or less may not constitute more than one day."

Day-Counting Examples:

• Example A (Overnight under 24 hours): You arrive in Maryland at 8:00 PM on Friday and depart at 9:00 AM on Saturday. Although you were in the state on two separate calendar days, the entire stay was a continuous block of 13 hours (under the 24-hour limit). This counts as exactly 1 day towards your 183-day count.
• Example B (Overnight exceeding 24 hours): You arrive in Maryland at 8:00 AM on Friday and leave at 9:00 AM on Saturday. The continuous period was 25 hours. Because it exceeded the 24-hour limit and spanned across two calendar days, this counts as 2 days of physical presence.
• Example C (Transit Exception): If you are merely passing through Maryland in transit to another destination (e.g., driving through on I-95 without stopping or transferring planes at BWI), that time is excluded from your day count.

4. Reciprocal Agreements

Maryland has reciprocal income tax agreements with Pennsylvania, Virginia, West Virginia, and the District of Columbia. Under these agreements, wages, salary, and other employee compensation earned in Maryland by residents of these states are exempt from Maryland tax (and vice versa).

Crucial Limit: Except for West Virginia, these reciprocal exemptions do not apply if you are physically present in Maryland for 183 days or more during the taxable year. If you exceed this day count, you will lose the reciprocal benefit and face taxation as a resident.

5. The Burden of Proof and Audit Defense

In any residency audit, the burden of proof rests entirely on the taxpayer. The Comptroller of Maryland will presume you are a resident unless you can prove otherwise with clear, contemporaneous evidence. Relying on flight itineraries, credit card swipes, or calendar entries created after the fact is often insufficient and heavily scrutinized by auditors.

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