How Is Property Tax Calculated in Maryland?

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Sep 2, 2025
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Property taxes are one of the largest recurring expenses for Maryland homeowners, and understanding how they are calculated can help you plan and budget more effectively. In Maryland, property tax bills are based on the assessed value of your property and the applicable tax rates set by state and local jurisdictions. The calculation follows a clear formula, but the underlying components—assessment and tax rates—can vary significantly depending on location.

The Basic Formula

Maryland calculates property tax using this formula: Property Tax = (Assessed Value ÷ 100) × Tax Rate

This means that for every $100 of assessed property value, the tax rate is applied to determine your annual property tax bill.

Example:

If your home is assessed at $300,000 and your combined state and local tax rate is 1.2%, your property tax would be: ($300,000 ÷ 100) × 1.2 = $3,600 annually

It’s important to note that Maryland tax rates are expressed per $100 of assessed value, not as a percentage. So even though the math works out the same, the formatting of the formula is slightly different from many other states.

Assessed Value: Determined by SDAT

The Maryland State Department of Assessments and Taxation (SDAT) is responsible for determining the assessed value of all real property in the state. This value is meant to reflect the fair market value of the property and is updated on a three-year assessment cycle.

To determine value, SDAT may use:

  • Sales comparison approach (comparing to similar nearby sales)
  • Cost approach (estimating replacement cost minus depreciation)
  • Income approach (for income-producing properties)

Tax Rates: Vary by Location

While the state rate is fixed at 0.112%, county and municipal tax rates differ across Maryland depending on local budget needs. For example:

  • Baltimore City has one of the highest rates at 1.51%
  • Montgomery County is closer to 0.87%

Your total property tax bill includes a combination of:

  • State tax
  • County tax
  • Municipal tax (if applicable)

Final Thoughts

In Maryland, calculating property tax involves both the assessed value of your home and the local tax rates in your area. By understanding the formula and staying informed about assessments, homeowners can better manage one of their largest annual expenses.

Contact Watter CPA today for help understanding and managing your Maryland property taxes.