Taxation Without Equalization

New York City doesn’t make it easy to calculate—let alone understand—the annual tax on a home. So here’s a quick rundown of how it’s done for Class 1 properties, or residences with one to three units. 

  1. Estimate a property’s market value based on recent sales of comparable buildings.
  2. Use the assessment ratio to determine the assessed value, which is a standard 6 percent of the market value. 
  3. Factor in the assessment cap, which limits assessment increases to 6 percent a year or 20 percent over five years. When applicable, this reduces the 6 percent assessment ratio.
  4. Subtract the exempt value, or any amount that is not taxable, from the assessed value to get the taxable value.
  5. Multiply the taxable value by the tax rate, which is 19.157 percent this year, to determine the annual property tax.
  6. Subtract any abatements, credits or refunds.
  7. To determine the effective tax rate, divide the market value by the property tax.

Got that? Let’s take a closer look at two properties with similar market values but very different tax bills.


The key factor behind the inconsistent tax bills is the rate at which a property value goes up. For rapidly appreciating properties such as the mayor’s, the assessment cap means that the tax can’t keep up with the market value.


As a result, the effective tax rate of 0.21 percent for the mayor’s Park Slope property is well below the borough-wide average of 0.66 percent, while the 1.06 percent rate for the Borough Park residence is far higher. How do they compare to the rest of the city?