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Updated 2025 Tax Year

King William County
Property Tax Guide

Everything you need to know about property taxes in King William County, VA. Rates, due dates, exemptions, and how it affects your monthly payment.

10 Official Sources
8 min read
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Quick Facts
Tax Rate
$0.920 per $100 assessed value (0.92%) for real estate; $3.40 per $100 for personal property
Exemptions
4+ Available
Section 1

How Property Tax Works

King William County, Virginia operates an independent property tax system that serves as the primary funding source for essential local services including public education, public safety, road maintenance, and county administration. The county bills and collects its own property taxes, providing direct accountability to residents for local government services.

For the 2025 tax year, King William County has set a real estate tax rate of $0.920 per $100 of assessed value, which translates to an effective rate of approximately 0.92%. Personal property taxes are assessed at $3.40 per $100 of assessed value for most items, with reduced rates for certain vehicle classifications. Property owners should note that actual tax bills may vary depending on location within the county, as some areas may be subject to additional special taxing districts or assessments that can affect the total tax burden.

The county reassesses all real estate properties periodically to ensure assessments reflect current market values. Property taxes in King William County are split into two semi-annual payments, making it easier for homeowners to manage this significant annual expense while ensuring steady revenue flow for county operations.

Section 2

What Makes Up Your Tax Bill

ComponentRate per $100 Assessed ValueDescription
Real Estate Base Rate$0.920Primary real estate tax rate for FY 2025-2026
Personal Property - Vehicles (§58.1-3506(A)(48))$3.15Standard vehicle personal property tax rate
Personal Property - Other$3.65Personal property not classified as vehicles
Special Vehicle Classification$1.15Reduced rate for certain vehicles under §58.1-3503(A)
Special Personal Property$1.65Reduced rate for qualifying personal property

Tax rates were approved by the King William County Board of Supervisors on May 19, 2025, and apply to the FY 2025-2026 levy year. Actual rates may vary by location within the county due to special taxing districts or municipal service areas. Property owners should verify their specific tax district designation, as additional assessments may apply in certain areas of the county.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in King William County, property taxes are due in two installments:

Pro tip: If you pay through mortgage escrow, your lender splits these payments across your monthly mortgage. If you pay directly, set calendar reminders to avoid late penalties.
Section 4

Supplemental Tax Bills

Supplemental taxes in King William County are additional property tax assessments that occur when there are changes to property ownership, value, or use outside of the regular assessment cycle. These taxes ensure that property tax obligations are properly allocated based on current ownership and property conditions throughout the tax year.

The most common triggers for supplemental taxes include: change of ownership through sale or transfer, completion of new construction or major improvements, change in property use (such as conversion from residential to commercial), or correction of assessment errors discovered by the county assessor. When a supplemental tax is issued, it represents the difference between the previous tax assessment and the new assessment, prorated for the portion of the tax year remaining.

For example, if a homeowner completes a $50,000 addition to their home in September, and the county discovers this improvement during a routine inspection, a supplemental tax would be calculated on the $50,000 increase in assessed value at the current tax rate of $0.920 per $100, prorated for the remaining months of the tax year. This would result in a supplemental tax of approximately $153 ($50,000 ÷ 100 × $0.920 × 4 months ÷ 12 months) due within 30 days of the supplemental bill being issued.

Example Calculation

Example 1: $300,000 Home

  • Assessed Value: $300,000
  • Homestead Credit Applied: -$2,760 (assuming available credit, requires application)
  • Net Taxable Value: $297,240
  • Annual Tax: $297,240 ÷ 100 × $0.920 = $2,735
  • Monthly Escrow: $228

Example 2: $600,000 Home

  • Assessed Value: $600,000
  • Homestead Credit Applied: -$2,760 (credit caps vary, requires application)
  • Disabled Veteran Credit: -$1,840 (if applicable, requires documentation)
  • Net Taxable Value: $595,400
  • Annual Tax: $595,400 ÷ 100 × $0.920 = $5,478
  • Monthly Escrow: $456

Example 3: $1,000,000 Home

  • Assessed Value: $1,000,000
  • Available Credits Applied: -$4,600 (various credits if qualified, all require application)
  • Net Taxable Value: $995,400
  • Annual Tax: $995,400 ÷ 100 × $0.920 = $9,158
  • Monthly Escrow: $763

All tax credits shown require separate applications and qualification verification. Credits are not automatically applied and must be renewed as required by county procedures.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in King William County require property tax escrow accounts to ensure timely payment of property taxes. Your lender collects monthly payments equal to approximately 1/12 of your annual property tax bill and holds these funds in a dedicated escrow account. The lender then pays your property taxes directly to King William County when payments are due on June 25 and December 5 each year.

At the beginning of each year, your lender will provide an escrow analysis statement showing the previous year's tax payments, current account balance, and any adjustments needed for the coming year. If your property taxes increase due to reassessment or rate changes, your monthly escrow payment will be adjusted accordingly. Conversely, if taxes decrease, you may receive a refund or see reduced monthly payments.

Property owners should verify that their lender has the correct parcel number and mailing address on file with the county to ensure proper tax payment processing. If you pay taxes directly without escrow, remember that King William County offers online payment options and that both semi-annual payments (June 25 and December 5 for FY 2025-2026) must be made on time to avoid penalty and interest charges.

How HonestCasa Helps
  • Understand whether your escrow is set correctly
  • See how rising taxes will change your monthly payment
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Section 6

Frequently Asked Questions

Q: When are property taxes due in King William County for FY 2025-2026? A: Real estate taxes are due June 25, 2025 and December 5, 2025. Personal property taxes are due January 15, 2026.

Q: What tax credits are available and how do I apply? A: King William County offers various tax credits including homestead credits for primary residences, disabled veteran credits, and elderly/disabled person credits. All credits require separate applications and supporting documentation. Contact the county assessor's office for specific application forms and deadlines, as credits are not automatically applied.

Q: How does the homestead credit work? A: The homestead credit typically caps annual assessment increases rather than reducing market value. This means your assessed value for tax purposes can only increase by a limited percentage each year, even if market value rises more dramatically. You must apply for this credit and it only applies to your primary residence and up to five acres of land.

Q: How often does King William County reassess properties? A: The county conducts periodic reassessments to ensure properties are assessed at current market value. Property owners receive notice before reassessment and have appeal rights if they disagree with the new assessed value. Appeals must be filed within the specified timeframe after receiving your assessment notice.

Q: What are the penalties for late property tax payments? A: Late payments are subject to penalty and interest charges that accrue monthly. The exact penalty rate and calculation method are established by county ordinance. To avoid penalties, ensure payments are received by the county by 5:00 PM on the due date.

Q: Can I pay my property taxes online? A: Yes, King William County offers online payment options for both real estate and personal property taxes. Visit the county's official website for secure payment processing, though convenience fees may apply for credit card transactions.

Q: Do I owe additional taxes if I live in a special district? A: Some areas of King William County may be subject to additional assessments for special services or municipal service districts. Check your tax bill carefully and contact the county if you have questions about additional charges beyond the base real estate tax rate.

Q: What happens if I disagree with my Personal Property Tax Relief Act (PPTRA) vehicle valuation? A: The PPTRA provides relief for qualified vehicles valued between $1,000 and $20,000, with relief amounts determined annually. If you disagree with your vehicle's assessed value, you can appeal through the county's personal property assessment appeal process within the specified timeframe after receiving your assessment.

Verified Sources

Backed by 10 Official Government Sources

Every fact in this guide is sourced from official county, state, and federal documents.

01
County
Tax Rates | King William County, VAkwc.gov
02
Commissioner of the Revenue Karena L. Funkhouserkwc.gov
03
County
2025 County Land Usekwc.gov
04
County
Personal Property | King William County, VAkwc.gov
05
County
County Administrator&#39s BLOGkwc.gov
06
Disabled Veteran Exemptionskwc.gov
07
Chapter 2. Homestead Exemption of Householderlaw.lis.virginia.gov
08
County
Site Map • King William County, VA • CivicEngagekwc.gov
09
County
King William County, Virginiakwc.gov
10
County
Property Reassessment | King William County, VAkwc.gov
All sources verified as of 2025 Tax Year

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