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Updated 2025 Tax Year

Grant County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
0.7% to 1.2% of assessed value (varies by taxing districts)
Exemptions
5+ Available
Section 1

How Property Tax Works

Grant County's property tax system operates under Washington State's framework, funding essential local services including schools, roads, fire protection, and county operations. Property owners in Grant County pay an effective tax rate that varies significantly by location within the county, typically ranging from approximately 0.7% to 1.2% of assessed value, depending on the specific taxing districts that serve each property.

The county uses a complex system of overlapping taxing districts, meaning your actual tax rate depends on which school district, fire district, hospital district, and other special purpose districts serve your property. Grant County assesses properties annually at 100% of fair market value, with no assessment growth caps like some other states. Property tax bills are divided into two installments, creating a manageable payment structure for homeowners while ensuring steady revenue flow for local government services.

Section 2

What Makes Up Your Tax Bill

ComponentApproximate Rate RangeDescription
County General$1.50-$2.00 per $1,000Basic county services, administration
School Districts$4.00-$8.00 per $1,000Local school operations and bonds
State School Levy$2.70 per $1,000State-mandated education funding
Road Districts$0.50-$1.50 per $1,000Local road maintenance and construction
Fire Districts$1.00-$2.50 per $1,000Fire protection and emergency services
Hospital Districts$0.75-$1.25 per $1,000Local hospital and healthcare services
Port Districts$0.25-$0.75 per $1,000Economic development (where applicable)
Total Combined Rate$10.70-$18.70 per $1,000Varies by specific location

Rates shown are for Tax Year 2025 (payable in 2025). Your actual rate depends on which combination of districts serve your property address. The Grant County Assessor's office can provide the exact rate for any specific parcel.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Grant 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 Grant County are triggered by significant changes to property ownership or improvements that occur after the January 1st assessment date. The most common triggers include new construction completion, major remodeling projects that add square footage or significantly upgrade a property, and change of ownership situations where the Assessor discovers the property was previously undervalued.

When supplemental taxes are assessed, they're calculated by taking the difference between the old assessed value and the new assessed value, multiplying by your property's tax rate, and prorating for the remaining months in the tax year. For example, if you complete a $100,000 home addition in July and your tax rate is $12 per $1,000 of assessed value, you would owe approximately $600 in supplemental taxes (($100,000 ÷ 1,000) × $12 × 50% for half the year). Supplemental tax bills are typically mailed 30-60 days after the assessment change and become due immediately upon receipt.

Example Calculation

Example 1: $300,000 Home in Ephrata School District

  • Assessed Value: $300,000
  • Combined Tax Rate: $13.50 per $1,000
  • Annual Tax: ($300,000 ÷ 1,000) × $13.50 = $4,050
  • Monthly Escrow: $337.50

Example 2: $600,000 Home with Senior Citizen Tax Credit

  • Assessed Value: $600,000
  • Senior Tax Credit: -$77,200 (requires application, income limits apply)
  • Net Taxable Value: $522,800
  • Combined Tax Rate: $14.25 per $1,000
  • Annual Tax: ($522,800 ÷ 1,000) × $14.25 = $7,450
  • Monthly Escrow: $620.83

Example 3: $1,000,000 Home in Rural Fire District

  • Assessed Value: $1,000,000
  • No credits applied
  • Combined Tax Rate: $11.75 per $1,000
  • Annual Tax: ($1,000,000 ÷ 1,000) × $11.75 = $11,750
  • Monthly Escrow: $979.17

Note: Tax credits require annual application and have income/age eligibility requirements. Rates vary by exact location within Grant County.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Grant County require borrowers to maintain an escrow account for property tax payments, especially when the loan-to-value ratio exceeds 80%. Your lender will estimate annual property taxes based on the previous year's assessment and current tax rates, then collect 1/12th of that amount with each monthly mortgage payment. The escrow account also typically includes homeowners insurance premiums.

Lenders pay your property taxes directly to Grant County on your behalf, usually making the first half payment by April 30th and the second half by October 31st. Each year, your lender will conduct an escrow analysis to determine if your monthly payment needs adjustment based on changes in tax assessments or rates. If your escrow account has a shortage, you may need to pay a lump sum or accept higher monthly payments. If there's a surplus over $50, federal law requires the lender to refund the excess. You can request annual escrow statements and should verify that payments were made correctly by checking with the Grant County Treasurer's office online payment system.

How HonestCasa Helps
  • Understand whether your escrow is set correctly
  • See how rising taxes will change your monthly payment
  • Plan ahead instead of being surprised by "shortage" letters
Section 6

Frequently Asked Questions

Q: When are property taxes due in Grant County for 2025? A: The first half payment is due April 30, 2025, and the second half is due October 31, 2025. Payments are considered on time if received by 5:00 PM on the due date.

Q: What tax credits are available and do I need to apply? A: Grant County offers several tax credits that require annual application, including the Senior Citizen/Disabled Person Tax Credit (income limits apply), the Veterans' Disability Tax Credit, and the Property Tax Exemption for Widows/Widowers. All credits require filing applications with the Grant County Assessor by December 31st of the assessment year.

Q: Is there a homestead tax credit that limits assessment increases? A: Washington State does not offer a traditional homestead credit that caps assessment growth. However, seniors and disabled persons may qualify for property tax relief programs that freeze assessed values at certain levels, but these require annual application and strict income eligibility requirements.

Q: How often are properties reassessed in Grant County? A: Properties are reassessed annually as of January 1st. The Assessor's office conducts physical inspections on a rotating cycle, typically visiting each property every 4-6 years, but assessed values are updated yearly based on market analysis.

Q: What happens if I pay my property taxes late? A: Late payments incur penalties and interest. First half payments made after April 30th incur 3% penalty plus 1% monthly interest. Second half payments after October 31st face the same penalties. After three years of delinquency, properties may be subject to tax foreclosure.

Q: Can I pay my property taxes online? A: Yes, Grant County offers online payment through Point&Pay at the county treasurer's website. There's a convenience fee for credit card payments, but electronic check payments typically have lower fees. Payments may take 3-5 business days to post.

Q: How do special district taxes affect my bill? A: Your property location determines which fire district, school district, hospital district, and other special districts serve you. These districts can levy additional taxes for operations and voter-approved bonds. Your total rate is the sum of all applicable district rates.

Q: How do I appeal my property assessment? A: Assessment appeals must be filed with the Grant County Board of Equalization by July 1st of the assessment year, or within 30 days of receiving a change of value notice. Appeal forms are available at the Assessor's office or online at the Washington Department of Revenue website.

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