Rate Breakdown

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

How Property Tax Works in Mason County

Property taxes in Mason 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 Mason County Assessor’s Office determines your property’s market value annually, effective January 1. Assessments are based on recent sales of comparable properties.
• Tax Calculation: Your tax bill is calculated by multiplying the assessed value by the combined millage rates (expressed as dollars per $1,000 of value). Rates vary depending on your location’s school, fire, and other local districts.
• Tax Districts: Rates include levies for county operations, schools, emergency services, and voter-approved bonds or levies.

Available Exemptions

Washington State and Mason County offer several exemptions to reduce property tax burdens for eligible residents:

• Senior Citizen/Disabled Exemption: Homeowners aged 61+ or with disabilities may qualify for reduced property taxes based on income limits. Applications must be filed with the Assessor’s Office.
• Veteran Exemptions: Disabled veterans or their surviving spouses may qualify for partial exemptions. Documentation of VA disability status is required.
• Homestead Exemption: While Washington doesn’t offer a traditional homestead exemption, the Senior Citizen/Disabled program provides similar relief for primary residences.

Contact the Mason County Assessor’s Office for eligibility details and application deadlines.

Payment Schedule & Deadlines

Mason County property taxes are due in two installments annually:

• First Half: Due by April 30 (or next business day if weekends/holidays apply).
• Second Half: Due by October 31.

Late Payments: A 1% interest charge is applied monthly on unpaid balances. Delinquent accounts may face penalties or tax liens after three years. Payment options include:

• Online (credit/debit/e-check)
• Mail or in-person at the Treasurer’s Office
• Partial payments accepted, but full payment by deadlines avoids penalties.

Appealing Your Assessment

If you believe your property’s assessed value is inaccurate, you can appeal to the Mason County Board of Equalization (BOE):

• Deadline: Appeals must be filed within 60 days of the assessment notice (typically mailed mid-summer).
• Process: Submit a written appeal with supporting evidence (e.g., recent appraisals, comparable sales). The BOE will schedule a hearing to review your case.
• Outcomes: If successful, your assessed value and subsequent tax bill may be adjusted retroactively.

For forms and detailed instructions, visit the Mason County Assessor’s or BOE website.