Maryland statutory residency: 183 days, abode, and the 'Snowbird Tax'
Maryland taxes residents at up to 5.75%, plus county piggyback rates totaling about 9%, and it runs aggressive residency audits on departing residents.
Maryland's combined state and county income tax can reach 9%+, among the highest in the country. Counties like Howard, Montgomery, and Baltimore add piggyback rates on top of the state rate. For high-earners moving to no-tax states, the savings are substantial, but Maryland's Comptroller's Office runs an aggressive residency audit program.
Maryland's residency tests
You're a Maryland resident if either applies:
- Domicile-based: Maryland is your domicile.
- Statutory residence: you maintain a place of abode in Maryland for more than 6 months AND spend more than 183 days there.
Maryland's 'snowbird tax' (HB 1148)
Maryland law specifically targets snowbirds: even after changing domicile, if you keep an MD home and spend significant time there, the abode + 184-day rule catches you. The state's Comptroller actively audits Maryland-to-Florida moves.
What counts as a Maryland day
Any presence on a calendar day counts. BWI airport layovers may count if you cleared TSA on an MD-origin flight. Driving I-95 through Maryland counts. Because partial days and drive-throughs land in the Maryland column, the total climbs faster than a diary suggests, so run your entry and exit dates against Maryland's 184-day line and keep the margin visible.
Maryland domicile-change checklist
- Establish new-state domicile.
- Sever the Maryland home, sell or terminate lease if possible.
- Move spouse and minor children.
- Update voter registration, driver's license, vehicle registration.
- File final part-year MD return.
- Track MD days from move date forward.
Track Maryland days
Tax Days tracks MD days alongside DC, VA, and your new-state days. The exported PDF supports Maryland Comptroller audits.
Frequently asked questions
What is Maryland's 183-day rule for statutory residency?
Maryland generally treats you as a statutory resident if you maintain a place of abode in the state for more than 6 months and spend more than 183 days there during the tax year. This can apply even if your domicile is in another state.
What is Maryland's snowbird tax?
Maryland law specifically targets snowbirds: even after changing your domicile, keeping a Maryland home and spending significant time there can still make you a statutory resident under the abode plus 184-day rule. The Comptroller's Office actively audits Maryland-to-Florida moves.
What counts as a day in Maryland for residency purposes?
Any presence in Maryland on a calendar day generally counts. A BWI airport layover may count if you cleared TSA on a Maryland-origin flight, and driving I-95 through Maryland counts as a Maryland day.
How high are Maryland income taxes?
Maryland's combined state and county income tax can reach 9% or more, among the highest in the country. Counties like Howard, Montgomery, and Baltimore add piggyback rates on top of the state rate, which is why moves to no-tax states can produce substantial savings.
How do I change my domicile out of Maryland?
Typically you establish domicile in the new state, sell the Maryland home or terminate the lease if possible, move your spouse and minor children, and update your voter registration, driver's license, and vehicle registration. You would then generally file a final part-year Maryland return and track your Maryland days from the move date forward.