St. Mary's County Paycheck Calculator — Local Income Tax
St. Mary's County, Maryland charges a flat 3.20% local income tax on top of your federal, FICA and Maryland state income tax. On a $100,000 salary that's about $3,200 a year in St. Mary's County local tax, leaving $71,442/year take-home ($2747.75 biweekly) for a single filer in 2026. Enter your own pay in the calculator above for an exact breakdown.
$2,276.63 take-home / paycheck
Gross: $2,884.62 · Federal: $295.00 · Social Security: $178.85 · Medicare: $41.83 · St. Mary's County: $92.31
Annual take-home: $59,193 on $75,000 gross · 79% of gross
Includes St. Mary's County local income tax.
Full breakdown (per paycheck & annual)
| Line | Per paycheck | Annual |
|---|---|---|
| Gross pay | $2,884.62 | $75,000 |
| Federal income tax | −$295.00 | −$7,670 |
| Social Security (6.2%) | −$178.85 | −$4,650 |
| Medicare (1.45%) | −$41.83 | −$1,088 |
| St. Mary's County local tax | −$92.31 | −$2,400 |
| Take-home (net) | $2,276.63 | $59,193 |
Federal & FICA: IRS Rev. Proc. 2025-32 + SSA 2026 (SS wage base $184,500). State: Tax Foundation 2026. St. Mary's County local tax: official jurisdiction source, 2026. Assumes constant pay. How we calculate →
How St. Mary's County's local income tax works
St. Mary's County levies a flat 3.20% local income tax on top of Maryland's state income tax — the same piggyback mechanism used across Maryland's 23 counties and Baltimore City. Because the rate is flat, your local tax is simply your taxable income multiplied by 3.20%, regardless of how much you earn.
On $60,000, that's $1,920 a year; on $100,000, $3,200 a year. Flat rate.
St. Mary's County vs. Maryland state tax and neighboring jurisdictions
Maryland's own state income tax (separate from St. Mary's County's local tax) applies statewide; on a $100,000 salary that's about $4,538 a year before any local tax is added.
Among the 24 local jurisdictions in this dataset for Maryland, St. Mary's County ranks #12 by dollar amount of local tax owed on a $100,000 salary — the highest is Dorchester County and the lowest is Worcester County.
St. Mary's County paycheck example (2026, single filer)
$60,000 salary: federal $5,020, FICA $4,590, Maryland state tax $2,638, St. Mary's County local tax $1,920 → take-home $45,832/year ($1762.75 biweekly).
$100,000 salary: federal $13,170, FICA $7,650, Maryland state tax $4,538, St. Mary's County local tax $3,200 → take-home $71,442/year ($2747.75 biweekly).
These assume the standard deduction, no pre-tax 401(k)/health deductions and biweekly pay. Use the calculator above for your own salary, filing status and deductions.
Who pays St. Mary's County's local income tax
This tax applies to residents of St. Mary's County based on where you live, following the same piggyback withholding as Maryland's state income tax. Nonresidents working in St. Mary's County are generally not subject to this county/city tax (confirm with your employer's payroll department).
St. Mary's County local tax — frequently asked questions
How much is St. Mary's County's local income tax?
St. Mary's County charges a flat 3.20% local income tax. On a $100,000 salary that works out to about $3,200 a year for a single filer in 2026.
What is the take-home pay on $60,000 in St. Mary's County?
About $45,832 a year ($1762.75 biweekly) for a single filer in 2026, after federal tax, FICA, Maryland state tax and St. Mary's County's local tax of $1,920.
What is the take-home pay on $100,000 in St. Mary's County?
About $71,442 a year ($2747.75 biweekly) for a single filer in 2026, after federal tax, FICA, Maryland state tax and St. Mary's County's local tax of $3,200.
Is St. Mary's County's local tax the same as Maryland's state income tax?
No — they're separate. Maryland state income tax applies regardless of local jurisdiction; St. Mary's County's local tax (a flat 3.20% local income tax) is added on top, following the same piggyback withholding.
Is St. Mary's County's local tax higher or lower than other Maryland jurisdictions?
St. Mary's County ranks #12 of 24 local jurisdictions covered for Maryland by dollar amount of tax at $100,000 — Dorchester County is the highest and Worcester County is the lowest.
How is St. Mary's County's local income tax calculated?
Your local taxable income (the same base used for Maryland state tax) is multiplied by 3.20%.
Other local income tax jurisdictions in Maryland
More paycheck & tax tools
Maryland paycheck calculator (state-level) · Federal income tax calculator · National paycheck calculator
Researched & verified by the Calcuris Data & Research Team. How we build and check our tools →