Miami County Property Tax Appeal, Ohio

Travis Bunn·Updated July 25, 2026

Miami County is located in west-central Ohio with Troy as the county seat and a 2026 estimated population of approximately 113,400. Major population centers include Troy (27,530), Piqua (21,191), and Tipp City (10,713). The county is part of the Dayton metropolitan area and features a diverse economy with agriculture, manufacturing, and service industries. With an effective tax rate of 1.33% and a median home value around $165,000 to $172,000, Miami County's property tax burden is notably higher than the national average rate of 1.02%, though the median annual tax bill of approximately $2,118 to $2,239 sits near or below the national median of $2,400.

Notable cities: Troy, Piqua, Tipp City

Median Home

$165,000

Tax Rate

1.33%

Annual Tax

$2,118

Population

113,400

On the typical Miami County home, valued near $165,000 at the county’s effective tax rate of 1.33%, an over-assessment of even 10% means you are overpaying year after year until you appeal it. Here is how to find out if yours qualifies.

2026 Appeal Deadline: March 31, 2026

This year's appeal window has passed in most of Ohio. Order now and we re-run your numbers free when the window reopens, so your evidence is ready the day your next notice lands.

You may file an appeal with the Board of Revision between January 1, 2026 and March 31, 2026. Your complaint must be received by the Board of Revision or postmarked by March 31. Late filings are not accepted, and missing the deadline means you cannot challenge your 2025 assessment.

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Ohio residential street of family homes. Miami County appeal guide.

How Miami County Assesses Property

35%of market value

Assessed by: Miami County Auditor's Office

Assessment cycle: triennial

Notices typically mailed: Spring (April-May)

In Miami County, property taxes are calculated based on assessed value, which is 35% of the property's market value as determined by the County Auditor. For example, if your home's market value is $165,000, at Ohio's 35% assessment ratio your assessed value would be $57,750. At the county's effective rate of 1.33%, this would result in approximately $2,195 in annual property taxes before any exemptions or credits are applied.

The Appeal Process

Appeals are heard by the Board of Revision. The Board of Revision consists of the County Auditor, County Treasurer, and the President of the Board of Commissioners. You will be notified of your hearing date after filing and typically have 5-15 minutes to present your evidence. The Board reviews your petition and evidence to determine if a valuation adjustment is warranted.

Step 1: Review your property assessment notice and gather evidence. Check your property's market value on the Miami County Auditor's website at https://miamicountyohioauditor.gov to verify your current assessment.

Step 2: Collect supporting evidence including recent comparable sales within the past year, a professional appraisal if available, photographs showing property defects or needed repairs, and repair estimates for any structural issues.

Step 3: Complete DTE Form 1 (Complaint Against the Valuation of Real Property). Obtain the form from the Auditor's Office by calling (937) 440-5925, visiting in person, or checking the county's online forms page.

Step 4: Submit your completed form with all supporting evidence to the Miami County Board of Revision by mail or in person before the March 31, 2026 deadline. Keep copies of all documents for your records.

Step 5: Attend your Board of Revision hearing when scheduled. You will be notified of the hearing date and typically have 5-15 minutes to present your case. The Board consists of the County Auditor, County Treasurer, and a County Commissioner.

Step 6: If your appeal is denied by the Board of Revision, you may appeal to the Ohio Board of Tax Appeals within 30 days of the Board of Revision's decision.

Step 7: If necessary, further appeals can be made to the Ohio Court of Common Pleas or Court of Appeals if administrative appeals are unsuccessful.

Required form: DTE Form 1 (Complaint Against the Valuation of Real Property)

Filing Methods

mail:Mail to Miami County Board of Revision, 201 W Main St, Troy, OH 45373. Must be postmarked by March 31, 2026.

in-person:Miami County Auditor's Office, 201 West Main Street, Troy, OH 45373. Business hours: Monday-Friday, 8:00 AM - 4:00 PM.

online:Contact the Auditor's Office at (937) 440-5925 to verify current online filing availability at https://miamicountyohioauditor.gov

Evidence to Bring

Recent comparable sales from the past 6-12 monthsProfessional appraisal reportPhotographs of property defects or needed repairsRepair estimates or contractor quotesRecent purchase contract and closing statements (if recently purchased)Documentation of property damage or deterioration

Miami County Assessor Contact

Miami County Auditor's Office

Website: https://miamicountyohioauditor.gov

Online Portal: https://miamicountyohioauditor.gov

Hours: Monday - Friday, 8:00 AM - 4:00 PM

Tax Exemptions in Miami County

Homestead Exemption

$25,000 reduction in market value

Reduces the taxable value of the property for eligible seniors, disabled individuals, and qualifying surviving spouses

Eligibility: Age 65 or older, permanently disabled, or qualifying surviving spouse. New applicants (after 2014) must have Ohio adjusted gross income of $30,000 or less. Existing recipients prior to 2014 are grandfathered without income test.Deadline: Between the first Monday in January and the first Monday in June (annually)

Owner Occupancy Credit

2.5% reduction on qualifying levies

A 2.5% tax reduction for owner-occupied residential properties (applies only to tax levies passed before November 2013)

Eligibility: Property must be owner's primary residence. Rental properties, business properties, and second homes do not qualify.Deadline: One-time application required using DTE Form 105C

Disabled Veteran Homestead Exemption

$52,300 reduction in taxable value (adjusted annually for inflation)

Enhanced homestead exemption for 100% service-connected disabled veterans and their surviving spouses

Eligibility: Veterans with 100% service-connected disability rating or their surviving spouses. No income test required.Deadline: Apply at Miami County Auditor's Office using DTE Form 105I

Surviving Spouse of Public Service Officer

$58,000 homestead reduction

Exemption for surviving spouses of public service officers killed in the line of duty

Eligibility: Surviving spouse of a public service officer who has been killed in the line of duty or died from a fatal injury or illness sustained in the line of duty, including a heart attackDeadline: Contact Auditor's Office at (937) 440-5925 for application details

Miami County Appeal Packet · $49

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Frequently Asked Questions

What is the deadline to appeal my property taxes in Miami County for 2026?

The deadline to file a property tax appeal in Miami County for the 2026 tax year is March 31, 2026. You may file your complaint with the Board of Revision between January 1, 2026 and March 31, 2026. Your complaint must be received by the Board of Revision or postmarked by this date. Late filings are not accepted under any circumstances, and missing the deadline means you cannot challenge your 2025 assessment and must wait another full year. It is recommended to file early rather than waiting until the last day to avoid any issues with processing or mail delays.

How do I file a property tax appeal in Miami County online or in person?

To file a property tax appeal in Miami County, you must complete DTE Form 1 (Complaint Against the Valuation of Real Property) and submit it with supporting evidence to the Miami County Board of Revision. You can obtain the form by calling the Auditor's Office at (937) 440-5925, visiting in person at 201 W Main St, Troy, OH 45373 during business hours (Monday-Friday, 8:00 AM - 4:00 PM), or checking the county website at https://miamicountyohioauditor.gov. Online filing availability should be confirmed directly with the Auditor's Office. You can also file by mail (postmarked by March 31) or in person during business hours with all your supporting documentation.

What is the homestead exemption worth in Miami County?

The homestead exemption in Miami County reduces your property's taxable value by up to $25,000 for eligible seniors aged 65 or older, permanently disabled individuals, or qualifying surviving spouses. For example, if your home's market value is $165,000, the exemption would reduce your taxable value to $140,000, saving you approximately $331 per year at the county's effective rate of 1.33%. New applicants after 2014 must have Ohio adjusted gross income of $30,000 or less to qualify, but existing recipients prior to 2014 are grandfathered without an income test. Applications must be filed between the first Monday in January and the first Monday in June each year at the Miami County Auditor's Office.

What happens at a Board of Revision hearing in Miami County?

After you file your DTE Form 1 appeal, the Miami County Board of Revision will schedule a hearing and notify you of the date. The Board consists of the County Auditor, County Treasurer, and the President of the Board of Commissioners. At the hearing, you will typically have 5-15 minutes to present your case and evidence supporting your claim that your property is overvalued. You should bring all documentation including comparable sales, appraisals, photographs of defects, and repair estimates. The Board will review your petition and evidence to determine if a valuation adjustment is warranted. After the hearing, you will receive a written decision from the Board regarding their ruling on your property's valuation.

How much can I save by appealing my property taxes in Miami County?

The savings from a successful property tax appeal in Miami County depends on how much your property's assessed value is reduced. At the county's effective tax rate of 1.33%, every $10,000 reduction in your property's market value saves you approximately $133 per year in property taxes (after applying Ohio's 35% assessment ratio). For example, if you successfully reduce your home's valuation from $180,000 to $165,000, you would save about $199 annually. On a typical Miami County home valued near $165,000, an over-assessment of even 10% means you could be overpaying by approximately $219 per year until you appeal it. These savings continue year after year until the next revaluation cycle.

What evidence do I need for a Miami County property tax appeal?

For a successful property tax appeal in Miami County, you should gather several types of evidence to support your claim. Recent comparable sales from the past 6-12 months carry the most weight with the Board of Revision. A professional appraisal report provides strong third-party validation of your property's market value. Photographs documenting property defects, needed repairs, or deterioration help demonstrate why your property value should be lower. Contractor repair estimates or quotes for structural issues provide concrete dollar amounts. If you recently purchased the property, bring your sales contract and closing statements as evidence of market value. Submit all evidence when you file DTE Form 1 or at least 5 days before your hearing for the best chance of success.

Can I appeal my Miami County property taxes if I just bought my home?

Yes, you can absolutely appeal your Miami County property taxes even if you recently purchased your home, and your recent purchase price is actually strong evidence in your appeal. If you paid significantly less than the county's assessed market value, your sales contract and closing statements provide compelling proof that the assessment is too high. You must still file your appeal with the Board of Revision between January 1 and March 31 using DTE Form 1, and you should include your purchase documents along with any other supporting evidence such as the appraisal from your mortgage lender. The fact that a willing buyer and seller agreed on a specific price in an arm's-length transaction is considered highly reliable evidence of true market value by the Board of Revision.

What is Miami County's property tax assessment cycle and when will my property be revalued?

Miami County follows Ohio's triennial property assessment cycle, with a sexennial reappraisal (full revaluation) every six years and triennial updates in between. The county completed a sexennial reappraisal for tax year 2025, with property values determined during 2023-2024 by professional appraisers who physically viewed properties. Assessment notices are typically mailed in the spring (April-May) each year. The next update will occur in three years, with another full reappraisal in six years. During reappraisal years, the County Auditor utilizes recent property sales to determine market values as required by the Ohio Department of Taxation. Property owners have nearly 54,500 individual parcels maintained by the Auditor's office across the county.

Official Resources

Miami County Auditor Website →

Official county auditor website for property search, tax records, assessment information, and forms.

Miami County Board of Revision Information →

Information about the Board of Revision process, forms, and how to file a property valuation complaint.

Ohio Department of Taxation - Property Tax Forms →

State department providing DTE forms including Form 1 for property tax appeals and homestead exemption applications.

Miami County Official Website →

Official Miami County government website with links to all county offices including Auditor, Treasurer, and Recorder.

For state-wide appeal information including Ohio's assessment ratio and deadlines, see our Ohio Property Tax Appeal Guide →

Considering professional help with your appeal? Compare pricing, coverage, and pros/cons in our Best Property Tax Appeal Services (2026) or browse side-by-side service comparisons →

More Ohio Counties

Adams County (West Union)Allen County (Lima)Ashland County (Ashland)Ashtabula County (Jefferson)Athens County (Athens)Auglaize County (Wapakoneta)

← All Ohio property tax appeal info

Sources: https://storymaps.arcgis.com/stories/d1560ca75562406cbc4b495aca6755de | https://www.appealdesk.com/appeals/ohio/miami | https://www.miamicountyohioauditor.gov | https://www.co.miami.oh.us/558/Detailed-Responsibilities | https://worldpopulationreview.com/us-counties/ohio/miami-county

Last verified: 2026-07-25