Maryland Property Tax Calculator (Assessed Value & Millage Rates)

With a statewide average effective property tax rate of 0.95%, Maryland sits at #21 nationally, above the national median. That is close to the national average of roughly 1.0%, based on the average effective rate across all 50 states. Compared with the rest of the South, which averages roughly 0.79%, Maryland lands well above its neighbors.

That revenue underwrites the basics (public schools, county government, emergency services), the same way it does across most of the South, though the specific mix of school, county, and municipal millage varies by jurisdiction within Maryland.

Assessments are handled at the county level in Maryland, where local appraisers periodically revalue residential and commercial parcels and apply the applicable millage rates; homestead exemptions and formal appeals remain the main levers available to individual owners looking to manage the bill, alongside any local bond measures voters approve along the way.

Maryland is the rare state that levies a property tax at the state level as well as the county level, and the only one that reassesses every property on a rolling three-year cycle with the increase phased in evenly over those three years. A jump in value never lands all at once.

None of that detail is asked for here. This calculator works one level up, applying Maryland's average effective property tax rate of 0.95% to the value you enter. That rate is the ratio of property taxes actually paid to home value across the state, so the assessment ratios, caps, and exemptions described above are already baked into it.

Working through it in order:

1. Start from the phased-in assessment. One third of the state's properties are reassessed each year, and any increase enters the roll in three equal steps.
2. Apply the Homestead Tax Credit. It caps the taxable assessment increase on a principal residence at 10% statewide, and many counties set a lower local cap.
3. Multiply by the effective rate. At 0.95%, a $400,000 home in Maryland comes to $3,800 a year before any exemption you enter above.
4. Divide by twelve for escrow. That same home works out to $316.67 a month set aside in a mortgage escrow account.
5. Compare it against your own bill. The Homeowners' Tax Credit then limits the bill by household income, which functions as a circuit breaker on top of the assessment cap. Your county's number is the one that governs; this figure tells you whether it is roughly where a Maryland home of that value ought to land.

Using this calculator's baseline inputs: a $400,000 home in Maryland, taxed at the state's 0.95% average effective rate (rank #21 of 50 states).

1. Start with the assessed value. The home is assessed at its full $400,000.00 market value, with no homestead exemption applied in this baseline scenario.
2. Apply the effective rate. $400,000.00 × 0.95% = $3,800.00 in annual property tax, Maryland's statewide average effective rate.
3. Convert to a monthly escrow. Lenders typically collect property tax in twelve equal installments alongside principal and interest: $3,800.00 ÷ 12 = $316.67 per month.
4. Project a five-year hold. At a flat rate, five years of ownership totals $3,800.00 × 5 = $19,000.00, before any reassessment, exemption change, or millage increase.

At 0.95%, Maryland lands roughly in the middle nationally, ranking #21 of 50 states. That is a moderate but still material carrying cost for homeowners.

The engine multiplies taxable value by a single effective rate of 0.95%, so the twelve-row value sweep is a straight line with no threshold in it. The three questions it can answer are what the exemption is worth, what a change in value costs, and what value hits a target escrow figure.

Pricing the exemption. On the baseline $400,000 home the engine returns $3,800.00 a year with no exemption, or $316.67 a month. Apply the calculator's $25,000 homestead scenario and it returns $3,562.50 a year, or $296.88 a month. The exemption is therefore worth exactly $237.50 a year in Maryland, which is $25,000 multiplied by the 0.95% rate. That figure scales with the exemption and not with the home: a $25,000 exemption saves $237.50 on a $300,000 home and on a $3,000,000 home alike.

The marginal cost of the next unit. Each additional $10,000 of assessed value costs $95.00 a year. The engine returns $3,800.00 at $400,000 and $3,895.00 at $410,000. At $300,000 the annual bill is $2,850.00 and the monthly escrow $237.50; at $500,000 they are $4,750.00 and $395.83. There is no bracket anywhere in the sweep, so the cost per $10,000 is identical at the bottom and the top of the range.

The reverse question. Buyers usually work from an escrow ceiling rather than a tax figure. Holding the monthly Maryland escrow to $237.50 a month, or $3,600 a year, means an assessed value of $378,947.37, which the engine confirms exactly. Every further $100 a month of escrow tolerance corresponds to about $126,316 of additional assessed value.

Where the sweep table and the headline disagree. The twelve-row schedule steps assessed value from one sixth to two times the value entered, but it computes each row from the raw value, not from the value after the homestead exemption. Set the exemption to $25,000 and the headline drops to $3,562.50 while row 6 of the table, which sits at the entered $400,000, still reads $3,800.00. The gap is the $237.50 the exemption is worth, and it appears in every row of the table. The table is the correct answer to "what would this cost with no exemption at each value"; it is not a projection of the exempted bill.

A Maryland-specific caution about the exemption field. Maryland's actual Homestead Tax Credit does not shield a fixed dollar amount of value at all; it caps how much the taxable assessment may rise year over year, at a 10% statewide ceiling with counties setting lower caps. This calculator's exemption input subtracts a flat dollar amount instead, so the $237.50 it credits is a reasonable stand-in for a relief programme of that size and is not a model of the Maryland credit. The income-based Homeowners' Property Tax Credit, a circuit breaker limiting tax to a share of household income, has no representation here either.

What the single rate cannot express. 0.95% is a statewide average effective rate, and Maryland sets millage locally, so no individual parcel is taxed at exactly this figure. The engine holds one number per state, has no field for county or municipality, and applies no reassessment schedule of any kind. The rank of #21 of 50 is likewise a stored figure rather than something recomputed from the other 49 states inside this page.

• Specific hyper-local county and municipal millage district variations within Maryland.
• Front foot benefit charges and special taxing districts. Maryland counties including Howard, Baltimore, and Montgomery bill a separate front foot benefit assessment to properties on a street with water or sewer mains, and some jurisdictions layer on additional special taxing district charges to finance transportation or infrastructure improvements, both on top of the base county and municipal millage.
• Commercial vs residential assessment classification differentials.
• Property tax appeal reductions or localized board of equalization adjustments.

• Confusing Market Fair Value with Assessed Basis: Some jurisdictions assess property at fractional ratios rather than 100% of market value.
• Failing to File Homestead Paperwork: Homestead exemptions are rarely automatic; homeowners must file timely paperwork with the county appraisal district.
• Underestimating Post-Sale Supplemental Assessments: Purchasing a newly constructed or reassessed property often triggers catch-up supplemental tax bills.
• Ignoring Property Tax Appeal Windows: Missing the annual 30-to-60 day statutory protest window forfeits the right to challenge over-assessed property values for that tax year.

• U.S. Census Bureau: American Community Survey (ACS) Real Estate Assessment Benchmark Data. census.gov/programs-surveys/acs
• Comptroller of Maryland, the official state tax authority for Maryland rates, rules and forms. marylandtaxes.gov

Also consulted: Maryland State Department of Assessments and Taxation (SDAT): Property Tax Assessment Guidance.