Maryland tax residency rules
Threshold: 183 days · Days + Abode · Calendar year (Jan 1 – Dec 31)
Maryland's combined state and county piggyback rates can reach 9%+. The Comptroller's Office runs aggressive snowbird audits and specifically targets MD-to-FL moves.
- County piggyback rates add 2.5–3.2% on top of the state rate in counties like Howard and Montgomery.
- BWI airport layovers may count if you cleared TSA on a MD-origin flight.
- Snowbird-tax legislation (HB 1148) specifically targets departing residents who keep MD homes.
Rules tracked by Tax Days
MD Statutory Residency
- Type
- Days + Abode
- Threshold
- 183 days
- Period
- Calendar year (Jan 1 – Dec 31)
Statutory resident if you spend more than the threshold days AND maintain a permanent place of abode in the jurisdiction.
Generally, if you keep a place of abode in Maryland for more than six months AND are physically present 183 days or more in the year, Maryland taxes you as a resident. Any part of a day counts as a full day.
MD DomicileInformational
- Type
- Facts & Circumstances
- Threshold
- No fixed threshold
- Period
- Calendar year (Jan 1 – Dec 31)
Residency determined by examining the totality of your connections, home, family, business, social ties, time spent. No fixed day threshold.
Generally, if you are domiciled in Maryland on the last day of the year, you are taxed as a resident.
Maryland tax residency, FAQ
How many days can I spend in Maryland before becoming a tax resident?
Generally, spending more than 183 days in Maryland during a calendar year can make you a tax resident, provided you also maintain a permanent place of abode there. Generally, if you keep a place of abode in Maryland for more than six months AND are physically present 183 days or more in the year, Maryland taxes you as a resident. Any part of a day counts as a full day.
How does Maryland count a day of presence?
Day-counting rules vary: many jurisdictions treat any part of a calendar day spent in-country as a full day, while others require presence at midnight. Because the burden of proof is usually on you, keep a contemporaneous, day-by-day record of where you were.
What tax year does Maryland use?
Maryland measures residency over calendar year (jan 1 – dec 31).
Track Maryland on your iPhone
Tax Days runs the math for Maryland alongside every other US state, federal SPT, Schengen, and 200+ countries.
