This calculator computes your Maryland state income tax — plus the county local income tax every resident owes — from your Maryland adjusted gross income, using the state’s 2024 graduated brackets.
How it works
Maryland tax is built in three steps:
Maryland taxable income = AGI − standard deduction − exemptions
State tax = graduated brackets applied to taxable income
Local tax = county rate × taxable income
The standard deduction is 15% of Maryland AGI, capped between roughly $1,800 and $2,700 (single) or $3,600 and $5,450 (joint). Each personal exemption removes $3,200. The remaining taxable income runs through the 2% to 5.75% brackets, and your county rate (2.25%–3.20%) is then applied to the same taxable income.
Maryland bracket structure
Maryland’s brackets start steep at low income — 2%, 3%, and 4% on the first $3,000 — then flatten into the 4.75% band that covers most middle incomes up to $100,000 (single). The top 5.75% rate only applies above $250,000 (single) or $300,000 (joint). Because the local county tax is roughly the size of one full bracket, your combined marginal rate is often near 8%, which is why the calculator shows both the state and local pieces.
Example
A single filer with $75,000 of Maryland AGI, one exemption, in Montgomery County (3.20%):
- Standard deduction = max $2,700; exemption = $3,200
- Taxable income = $75,000 − $2,700 − $3,200 = $69,100
- State tax (through the 4.75% band) ≈ $3,200
- Local tax = 3.20% × $69,100 ≈ $2,211
- Total Maryland tax ≈ $5,400, an effective rate of about 7.2%
Note: This excludes the exemption phase-out, itemized deductions, and credits. Confirm with marylandtaxes.gov for your exact liability.