Rate Breakdown

Property taxes in Island County are calculated by multiplying the assessed value (minus exemptions) by the total local millage rate.

How Property Tax Works in Island County

Property taxes in Island County are based on the assessed value of your property and the combined millage (tax) rates set by local taxing districts. Here's how the process works:

• Assessment: The Island County Assessor's Office determines the fair market value of your property as of January 1 each year. This value is used to calculate your tax bill.
• Tax Rates: Tax rates (millage) are set by various entities, including schools, fire districts, and county services. These rates are combined into a single levy rate per $1,000 of assessed value.
• Calculation: Your annual tax = (Assessed Value / 1,000) x Total Levy Rate. For example, a $500,000 home with a 1% levy rate would owe $5,000 annually.

Available Exemptions

Island County offers several exemptions to reduce property tax burdens for eligible residents:

• Senior Citizen/Disabled Exemption: Low-income seniors (61+) or disabled individuals may qualify for a reduction in property taxes. Income limits apply.
• Veteran Exemption: Veterans with a 100% service-connected disability or their surviving spouses may be eligible for full or partial exemptions.
• Homestead Exemption: Washington does not have a general homestead exemption, but primary residences may qualify for deferral programs if the owner meets income requirements.

Applications for exemptions must be filed with the Island County Assessor's Office by the annual deadline (typically April 15).

Payment Schedule & Deadlines

Island County property taxes are due in two installments:

• First Half: Due by April 30. Late payments incur a 1% monthly penalty.
• Second Half: Due by October 31. Late payments incur the same penalty.

Payment options include online (credit/debit/e-check), mail, or in-person at the Island County Treasurer's Office. If taxes remain unpaid for three years, the county may initiate foreclosure proceedings.

Appealing Your Assessment

If you believe your property's assessed value is incorrect, you can appeal to the Island County Board of Equalization:

• Deadline: Appeals must be filed within 60 days of the assessment notice (typically by July 1).
• Process: Submit a written appeal with supporting evidence (e.g., recent appraisals, comparable sales). The board will review your case and may adjust the valuation.
• Further Appeals: If dissatisfied, you may appeal to the Washington State Board of Tax Appeals within 30 days of the county's decision.

For assistance, contact the Island County Assessor's Office or consult a property tax professional.