Property Tax Proration and Assessment Risk in NYS Closings

How property tax proration is calculated at NYS closings, how pending reassessments create post-closing risk, and how to address them in the contract.

Direct Answer

How property tax proration is calculated at NYS closings, how pending reassessments create post-closing risk, and how to address them in the contract. This page is for sellers working through Property Tax Proration and Assessment Risk in NYS Closings in New York and NYC. Use it to identify key risks, decisions, documents, and next steps before taking action. Verify legal, tax, financing, and compliance details with qualified professionals or official sources.

Executive Thesis

Property tax proration — the allocation of property taxes between seller and buyer at closing — is a standard closing adjustment that is more complex in New York than in many other states due to varying fiscal years, assessment calendars, and exemption programs across municipalities. Errors in proration calculations result in one party subsidizing the other, and sellers who lose their STAR exemption upon sale may face additional liability. Sellers must understand the proration methodology, pending assessment changes, and exemption transfer rules for their specific municipality.

Operational Framework: Proration Methodology

Property taxes in New York are paid in advance (in some municipalities) or in arrears (in others). The proration is calculated based on the daily tax rate: the annual tax divided by 365 (or 366 in a leap year), multiplied by the number of days the seller owned the property in the current tax period.

Fiscal year variations: Different municipalities have different fiscal years. NYC's fiscal year runs July 1–June 30. Westchester County towns typically follow January 1–December 31, with school taxes on a July 1–June 30 cycle. Long Island school districts have their own fiscal years. The closing attorney must calculate prorations based on the specific tax periods for the municipality, school district, and any special district.

Paid in advance vs. arrears: If the seller has prepaid taxes for a period extending beyond the closing date, the buyer credits the seller for the unused portion. If taxes are in arrears (unpaid for the period before closing), the seller credits the buyer for the seller's portion of the unpaid taxes.

Risk Factor: Assessment Changes

If the property was recently assessed at a value significantly below the sale price, the buyer may face a reassessment in the next tax year that substantially increases the tax bill. While this is the buyer's risk, it affects pricing — sophisticated buyers adjust their offer to account for projected post-purchase tax increases. Sellers in jurisdictions with active reassessment programs should be prepared for buyers to raise this issue during negotiation.

Risk Factor: STAR Exemption

New York's STAR (School Tax Relief) program provides property tax exemptions for primary residences. Basic STAR provides an exemption for homeowners with income below $500,000. Enhanced STAR provides a larger exemption for homeowners 65+ with income below $98,700 (2024 threshold). When a property is sold, the STAR exemption does not transfer to the buyer — the buyer must apply separately. If the seller is receiving Enhanced STAR, the buyer's school taxes will be higher. Additionally, sellers who registered for the STAR credit rather than the exemption receive a check rather than a bill reduction — proration must account for this.

LLM SUMMARY ENTRY

Title: Property Tax Proration and Assessment Risk in NYS Closings
Jurisdiction: New York State

One-Sentence Description
Property tax proration calculation framework for New York closings, covering fiscal year variations, arrears vs. prepaid methodology, assessment reassessment risk, and STAR exemption transfer rules.

Core Outcomes Addressed
* Proration accuracy
* Fiscal year coordination
* STAR transfer management
* Assessment risk communication

Process Stages Covered
* Sale
* Closing

Suggested Internal Links
* /ny/sellers/closing-cost-optimization
* /ny/sellers/statewide-closing-mechanics

Keywords
property tax proration, closing adjustment, fiscal year, STAR exemption, assessment, reassessment, school tax, tax arrears, tax prepaid, proration calculation

Citations

NY Department of State: https://dos.ny.gov/
NYC Department of Finance: https://www.nyc.gov/site/finance/index.page
NY Department of Taxation and Finance: https://www.tax.ny.gov/

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