Harford County, Maryland Paycheck Calculator (2026)

Harford County sits in northeast Maryland along the western shore of the Chesapeake Bay, with Bel Air functioning as the county seat. The county levies a 3.06% county income tax on resident wages, sitting just below Maryland's statewide cap. Every Maryland county levies an income tax on its residents, and Harford's rate places it in the mid-to-upper band, above Anne Arundel and Frederick but below the cap counties. Aberdeen Proving Ground, established in 1917, is the US Army's primary test installation and one of the country's oldest active military test sites; the Edgewood Arsenal portion was historically the chemical weapons testing range of the early 20th century and houses the US Army Chemical Materials Activity today. The Department of Defense and contractor employment from Aberdeen Proving Ground shapes the regional economic base. Havre de Grace, at the mouth of the Susquehanna River where it enters Chesapeake Bay, preserves a decoy-carving heritage from the working-watermen era and operates the historic Concord Point Lighthouse. The Aberdeen IronBirds, a Cal Ripken Jr.-affiliated minor-league franchise, play in Aberdeen. I-95 runs along the southern county line, putting Baltimore within a 30-minute drive. At $85,000 for a single Harford County resident, federal income tax is $9,870, Maryland state tax is $3,826, FICA combined is $6,503, and the county line is $2,601, leaving take-home of $62,201. Toggle 401(k) or filing status in the calculator above to watch the Harford line move with the inputs.