Property Tax Prorations When Selling in Orange County

How your property taxes are prorated at closing what you owe the buyer and how supplemental taxes are handled.

By Shasta Greene · March 20, 2026 · 5 min read

One of the most important aspects of closing on your Orange County home is understanding how property taxes are handled at the escrow table. Property tax prorations ensure a fair split of the tax burden between you and the buyer based on ownership dates. Let's break down how this process works and what you need to know before closing day.

What Does Property Tax Proration Mean?

Property tax proration is the process of dividing annual property taxes between the seller and buyer based on how many days each party owns the property during the fiscal year. In Orange County, property taxes run from July 1 to June 30, so your proration calculation depends on your closing date within this cycle.

• Taxes are calculated daily based on your property's assessed value
• The buyer pays taxes for days they own the property after closing
• You, as the seller, are responsible for taxes up to your closing date
• Adjustments are made at escrow to settle the difference

How the Proration is Calculated

Your escrow officer will obtain the most recent property tax bill for your Orange County home and divide the annual tax amount by 365 days. This creates a daily rate, which is then multiplied by the number of days you owned the property during the fiscal year. The buyer receives a credit for their portion at closing.

• Annual tax amount ÷ 365 = daily tax rate
• Daily rate × your ownership days = your prorated amount
• Buyer receives credit for remaining days
• Credit typically appears as a reduction in your net proceeds

Understanding Supplemental Taxes

If your home has increased in value since the last assessment, Orange County's Assessor may issue a supplemental tax bill. This occurs because Proposition 13 resets property values at sale. As the seller, you're typically responsible for supplemental taxes prorated through your closing date.

• Supplemental bills are issued when property value increases at sale
• You're responsible for the prorated amount through closing
• The buyer assumes responsibility for their portion after closing
• Supplemental taxes usually arrive weeks or months after closing

What Happens at Your Closing

Your escrow officer will prepare a detailed settlement statement showing all tax adjustments. Regular property tax prorations and estimated supplemental taxes are clearly itemized, affecting your final net proceeds. Review these figures carefully before signing your closing documents.

• Settlement statement itemizes all property tax adjustments
• Prorations reduce your net proceeds at closing
• Supplemental tax estimates are included in calculations
• Ask your escrow officer to explain any figures you don't understand

Property tax prorations might seem complex, but they're a standard and fair part of every real estate transaction in Orange County. Understanding this process helps you anticipate your closing costs and avoid surprises at the escrow table. Your escrow officer and real estate agent are valuable resources throughout this process.

Shasta Greene is an Orange County, California real estate advisor and REALTOR®, DRE #02174153.