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Updated 2025 Tax Year

Ottawa County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
3.90 mills base county rate plus 0.4111 mills E911 and 0.3100 mills parks, varies by local districts
1st Due
Jul 1
2nd Due
Dec 1
Exemptions
5+ Available
Section 1

How Property Tax Works

Ottawa County, Michigan operates on a property tax system that funds essential county services including public safety, parks, emergency services, and infrastructure. Property taxes in Ottawa County are based on a millage system, where rates are expressed in mills (one mill equals $1 per $1,000 of taxable value). The county's base millage rate for 2025 is 3.90 mills for county operations, with additional millages of 0.4111 mills for E911 services and 0.3100 mills for parks operations.

Actual property tax rates vary significantly throughout Ottawa County depending on your specific location and the special taxing districts that serve your property, such as school districts, municipal authorities, and special assessment districts. The total effective tax rate typically ranges from approximately 20-35 mills when including all local jurisdictions. For example, properties with Principal Residence Exemption status may see total rates around 20.44 mills in certain areas. Property owners should verify their specific millage rates with their local assessor, as rates can differ substantially between townships, cities, and school districts within the county.

Section 2

What Makes Up Your Tax Bill

ComponentRate (Mills)Description
Ottawa County Operations3.9000General county services and administration
E911 Emergency Services0.4111Emergency dispatch and communication systems
Parks and Recreation0.3100County parks maintenance and operations
Holland Community Pool Authority0.9009Community pool operations (specific districts only)
Subtotal County/Regional5.6220Base county and regional services
School District MillagesVariesLocal school operations and bond payments
Municipal MillagesVariesCity/township services
Library DistrictsVariesPublic library operations
Fire ProtectionVariesLocal fire department services
Total Effective Rate~20-35 millsVaries by specific taxing districts

Note: These rates apply to the 2025 tax year. Actual total rates depend on your specific location within Ottawa County and which special taxing districts serve your property. Properties qualifying for Principal Residence Exemption may have different effective rates.

Section 3

When Are Property Taxes Due?

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

First Installment
Jul 1
Delinquent after Dec 10
Second Installment
Dec 1
Delinquent after Apr 10
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 Ottawa County are additional property tax bills issued when there are significant changes to a property during the tax year. The most common triggers include change of ownership (sale/transfer), new construction or substantial improvements, and corrections to property assessments discovered after the regular tax roll was finalized.

When a supplemental tax is triggered, the Ottawa County Assessor calculates the difference between the previous assessment and the new assessment, then applies the current millage rate to determine the additional tax owed. This supplemental amount is prorated based on the number of months remaining in the tax year from the date of the triggering event.

For example, if you purchase a home in Ottawa County in September and the new assessment increases the taxable value by $50,000, with a total millage rate of 25 mills, your supplemental tax would be approximately $625 ($50,000 × 0.025 = $1,250 annually, prorated for 4 months = $417). Supplemental tax bills are typically issued within 30-60 days of the triggering event and have separate due dates from regular property tax installments.

Example Calculation

$300,000 Home Example:

  • Market Value: $300,000
  • Assessed Value (50% of market): $150,000
  • Less: Principal Residence Exemption: -$18,000 (if qualified and applied for)
  • Net Taxable Value: $132,000
  • Annual Tax (25 mills): $132,000 × 0.025 = $3,300
  • Monthly Escrow: $275

$600,000 Home Example:

  • Market Value: $600,000
  • Assessed Value (50% of market): $300,000
  • Less: Principal Residence Exemption: -$18,000 (if qualified and applied for)
  • Net Taxable Value: $282,000
  • Annual Tax (25 mills): $282,000 × 0.025 = $7,050
  • Monthly Escrow: $588

$1,000,000 Home Example:

  • Market Value: $1,000,000
  • Assessed Value (50% of market): $500,000
  • Less: Principal Residence Exemption: -$18,000 (if qualified and applied for)
  • Net Taxable Value: $482,000
  • Annual Tax (25 mills): $482,000 × 0.025 = $12,050
  • Monthly Escrow: $1,004

Note: These examples use a representative 25-mill total rate and assume qualification for Principal Residence Exemption, which requires annual application. Actual rates vary by specific taxing districts within Ottawa County.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Ottawa County require property tax escrow accounts for borrowers with less than 20% down payment, though some lenders may require escrow regardless of down payment amount. Your lender collects approximately 1/12 of your estimated annual property tax bill with each monthly mortgage payment, depositing these funds into a dedicated escrow account.

Ottawa County property taxes are paid in two installments: the first half is due February 19, 2026 (for Tax Year 2025), and the second half is typically due in July. Your lender will pay these bills directly to Ottawa County from your escrow account when they become due. After February 28, any unpaid taxes must be paid directly to Ottawa County rather than local municipalities.

It's important to review your annual escrow analysis statement to ensure adequate funds are being collected. If your property tax assessment increases significantly or if new special assessments are added, you may need to increase your monthly escrow contribution. You can verify your tax payments and balances through Ottawa County's online portal or by contacting the Finance Department directly for payment cutoff dates and current balance information.

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 Ottawa County property taxes due for the current tax year? A: For Tax Year 2025, the first half payment is due February 19, 2026. The second half is typically due in July 2026. After February 28, taxes must be paid directly to Ottawa County rather than local municipalities.

Q: What is the Principal Residence Exemption and how do I apply? A: The Principal Residence Exemption is a tax credit that reduces your taxable value and must be applied for annually. It exempts a portion of your primary residence's value from school operating taxes. You must own and occupy the property as your principal residence and file the appropriate application with the Ottawa County Assessor by the deadline.

Q: Does the Homestead Exemption cap my assessment increases? A: Michigan's assessment cap limits annual increases in taxable value to the lesser of 5% or the inflation rate for all properties. This is automatic and doesn't require application. However, when property changes ownership, the taxable value can increase to the current assessed value (uncapping).

Q: What other tax credits are available and do they require applications? A: Ottawa County offers various tax credits including disabled veteran exemptions, senior citizen exemptions, and poverty exemptions. All of these require separate applications with specific documentation and have annual filing deadlines. Contact the Ottawa County Assessor's office for specific eligibility requirements and application forms.

Q: How often are properties reassessed in Ottawa County? A: Properties are reassessed annually, with market value updates based on recent sales data and property characteristics. You'll receive a notice of assessment changes each year, typically in February or March, with information on how to appeal if you disagree.

Q: What are the penalties for late property tax payments? A: Late payments incur interest charges and penalties. After the February due date, interest begins accruing monthly. If taxes remain unpaid, the property may eventually be subject to foreclosure proceedings through the county treasurer.

Q: Can I pay my property taxes online? A: Yes, Ottawa County offers online payment options through their official website. You can pay by electronic check or credit card, though credit card payments may include processing fees. Check the Ottawa County website for current payment portal links and accepted payment methods.

Q: Why did I receive a supplemental tax bill? A: Supplemental taxes are issued when there are significant changes to your property during the tax year, such as new construction, major improvements, or ownership changes that affect the assessment. The supplemental amount represents the additional tax owed for the remaining months of the current tax year.

Q: How do special districts affect my tax rate? A: Your total property tax rate includes millages from multiple taxing authorities: Ottawa County, your school district, municipality, and any special districts (fire, library, etc.). This is why rates vary significantly throughout the county depending on your exact location and which services your property receives.

Q: What should I do if I disagree with my property assessment? A: You can appeal your assessment by contacting the Ottawa County Board of Review during their annual review period, typically in March. You'll need to provide evidence such as recent comparable sales, appraisals, or documentation of property condition issues that may affect value.

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