Property taxes are one of the largest ongoing costs of owning real estate in New York City. Whether you are a homeowner, investor, or prospective buyer, understanding how NYC property taxes work — and being able to estimate them accurately — is essential for financial planning.
How NYC Property Taxes Are Calculated
NYC property taxes are not based on market value. Instead, they are calculated using the assessed value, which is determined by the NYC Department of Finance (DOF) using formulas that vary by property type.
The city uses four tax classes:
- Tax Class 1: 1-3 family residential homes. Assessed at approximately 6% of market value. Subject to annual increase caps (6% per year, 20% over 5 years).
- Tax Class 2: Apartments, co-ops, and condos (4+ units). Assessed at 45% of market value, but with caps that often keep assessments well below that level for existing buildings.
- Tax Class 3: Utility company equipment and special franchise properties. Assessed at various rates.
- Tax Class 4: Commercial and industrial properties. Assessed at 45% of market value with no assessment caps.
The Tax Rate
Each tax class has its own tax rate, set annually by the City Council. For the current fiscal year, the Class 1 rate is approximately 20% of assessed value, and the Class 4 (commercial) rate is approximately 10.6%. The actual tax bill is: Assessed Value x Tax Rate = Annual Tax.
Common Tax Exemptions and Abatements
Several programs can significantly reduce your tax bill:
- STAR: School Tax Relief for primary residences. Basic STAR (income under $500K) and Enhanced STAR (seniors with income under $98,200).
- 421-a: Tax exemption for new residential construction (closed to new entrants in June 2022; succeeded by the 485-x program in 2024). Existing exemptions continue to phase out over 10-35 years depending on the program version.
- J-51: Tax exemption and abatement for residential renovation. Particularly common in older buildings undergoing rehabilitation.
- Senior Citizen Homeowner Exemption (SCHE): Reduces assessed value by 5-50% for qualifying seniors.
- Disabled Homeowner Exemption (DHE): Similar to SCHE for qualifying disabled homeowners.
- Veterans Exemption: Various levels based on service and disability status.
Why Exemptions Matter for Investors
When evaluating an investment property, always check for expiring exemptions. A building with a 421-a exemption might have artificially low taxes today. When the exemption expires, the tax bill could triple or quadruple. This dramatically affects carrying costs and investment returns.
RegWatch flags expiring exemptions automatically and calculates the projected post-exemption tax burden. Try our free tax calculator to see basic tax data for any NYC property.
How to Use Our Free Tax Calculator
- Enter any NYC address in the free tax calculator
- Select the borough (optional but improves accuracy)
- View the assessed value, market value, tax class, and estimated annual tax
- For full details including exemptions, abatements, and year-over-year trends, start a free account for more property data
Challenging Your Assessment
If you believe your property is over-assessed, you can challenge it through the NYC Tax Commission. The filing deadline is March 1 for Classes 2, 3, and 4, and March 15 for Class 1 properties. You will need evidence such as comparable sales, income/expense data, or an independent appraisal.
RegWatch can help by providing the assessed values and tax data for comparable properties in your area, giving you the data foundation for your challenge.