Maryland Tax Residency Rules 2026: 183-Day Rule & County Taxes

Who needs to read this

Maryland got measurably more expensive for high earners in 2025: new 6.25% and 6.5% brackets, a 2% capital-gains surtax, and county taxes now capped at 3.3%. Its residency rules were already among the more mechanical on the East Coast. The details matter if:

• You're leaving Maryland for Florida, Virginia, or anywhere cheaper, especially ahead of a sale or equity event
• You work in DC, Virginia, or Pennsylvania and live in Maryland, or vice versa
• You split the year between Maryland and a second home
• You're a high earner: the new brackets and the surtax both key off levels around $350,000–$500,000
• You moved in mid-year and need to know what Maryland taxes from when

How Maryland defines residency

Under Tax-General Article §10-101(k) and COMAR 03.04.02.01B, as explained in the Comptroller's Administrative Release 37, you are a Maryland resident if either:

1. You are domiciled in Maryland on the last day of the taxable year, or
2. You are a statutory resident: you maintained a place of abode in Maryland for more than six months of the taxable year and were physically present in the state for 183 days or more.

Both prongs of the statutory test are required. The Comptroller is explicit that "maintaining a place of abode" is not intended to capture every property owner: a residence used as a vacation home, or to come back and visit family and friends, doesn't make you a resident unless the 183-day presence test is also met.

A statutory resident owes Maryland tax on all income from all sources for the entire year and must file a resident return, the same footing as a lifelong domiciliary. (A 2025 bill to shorten the abode requirement from six months to three did not pass; the six-month rule stands.)

Reciprocity softens the edges for wage earners: Maryland has agreements with Pennsylvania, Virginia, West Virginia, and DC under which cross-border wages are taxed by the home jurisdiction only. Except for West Virginia, those agreements cut off at 183 days of physical presence in the non-domicile state.

Counting the days

Maryland defines the day precisely: any part of a day counts as a day, with one mercy: a continuous period of 24 hours or less may not constitute more than one day. An overnight Amtrak layover is one Maryland day, not two.

• The presence threshold is 183 days or more: Maryland counts day 183 itself, unlike "more than 183" states.
• Days are paired with the abode clock: the abode must be maintained more than six months of the same taxable year.
• If you keep a Maryland abode and claim under-183 presence, the burden of proof is functionally yours. Contemporaneous evidence (an automatic day log from iReside, travel records, receipts) is what separates a vacation-home owner from a statutory resident.
• The same 183-day arithmetic controls when reciprocity stops protecting your wages, so commuters flirting with the line have two reasons to count.

Domicile: the stickier test

Domicile is Maryland's second, stickier hook: your true, fixed, permanent home, which continues until superseded by a new one. Changing it requires intent supported by action: physical presence in the new home, new ties established, old ties severed.

Administrative Release 37 is unusually candid about weighting: the two most important criteria are where you live and where you are registered to vote. The rest of the factor list:

• Home: what you own or rent, where, and each home's size and value
• Time: where and how you actually spend the year, travel patterns, overall lifestyle
• Items near and dear: sentimental possessions, heirlooms, collections
• Active business involvement: how and where you earn a living
• Family connections: where the family lives, where minor children attend school, social and religious ties
• Plus vehicle registrations, bank accounts, and safe-deposit boxes

The FAQ examples show how sticky this is: a worker sent to adjacent states for years while the spouse and children stayed in Maryland remained a Maryland resident throughout; a temporary residence for business, health, or pleasure (however long) changes nothing without a new domicile actually established.

Part-year residents and nonresidents

Residents and part-year residents file Form 502; nonresidents file Form 505:

• Residents and part-year residents file Form 502, reporting worldwide income for the resident period; part-year filers prorate around their move date.
• Nonresidents file Form 505, paying tax on Maryland-source income: wages for work performed in Maryland, Maryland business income, gains and rent from Maryland real property, and Maryland gambling winnings. Losses and adjustments not allocable to Maryland can't reduce Maryland income.
• In place of a county tax, nonresidents pay a special nonresident rate set at the lowest county rate.
• High earners add Form 502CG for the capital-gains surtax on either return type.

Leaving Maryland doesn't end its claims: Maryland real estate stays taxable forever, and sales by nonresidents face mandatory withholding at closing (8.75% for individuals), with sales over $1.5 million ineligible for the tentative-refund shortcut. Wage earners in reciprocal states stay simple; everyone else calculates credits between jurisdictions.

Changing your residency status

To make an exit from Maryland hold:

• Move the two headline factors first: actually live in the new state, and re-register to vote there; the Comptroller names these as the most important criteria
• Move the family. The stayed-behind spouse is Maryland's favorite fact
• Manage the abode math if you keep Maryland property: either keep the abode period at six months or less, or keep presence under 183 days, and document whichever you rely on
• Shift licenses, vehicle registrations, bank relationships, and the address on every legal document
• Remember the last-day rule: domicile is tested on December 31, so a genuine move completed in December still ends the domiciliary year, but a paper move in December invites exactly the scrutiny you'd expect
• File the split-year Form 502 with a clean departure date, and keep records through the following year; big-income move years (the surtax's $350,000 FAGI trigger, the new brackets) are the ones worth auditing

How Maryland enforces its rules

Maryland's machinery is built for this:

• Data at closing: nonresident real-estate withholding means the Comptroller learns about property sales in real time
• Reciprocity boundaries: 183-day overstays convert protected commuters into statutory residents, and the wage-data trail makes them findable
• Domicile audits follow AR 37's factor framework: expect to document homes, voter registration, family location, and the year's actual living pattern; a "temporary" absence with Maryland ties intact is resolved against you
• Statutory-resident cases need only two facts, both provable from records: an abode over six months and 183 days of presence
• The 2025 changes raise the stakes: back-tax exposure now runs to 6.5% state + up to 3.3% local + the 2% surtax on gains, plus interest and penalties

Common mistakes

• Treating the condo as a trap in itself. An abode alone doesn't make you a resident, but pair it with 183 days of presence and it does. Know which side of the line your records prove.
• Forgetting the last-day rule. Domiciled in Maryland on December 31 = resident for that year's filing purposes, even after a mostly-elsewhere year.
• The stayed-behind spouse. Maryland's own published example decides this against the taxpayer.
• Leaning on reciprocity past 183 days. The agreements (except West Virginia's) expire with your day count, and statutory residency takes over.
• Ignoring the county layer. Local rates up to 3.3% ride on residency too; a failed exit costs you state and county tax.
• Selling appreciated assets after a paper move. With a 2% surtax above $350,000 FAGI and a 6.5% top bracket, the move-then-sell year is precisely the return Maryland has the most incentive to examine, and the least sympathy for.