AppealDesk

Miami County Property Tax Appeal — Ohio

Rob HartleyRob Hartley·Updated April 3, 2026

Miami County is located in west-central Ohio with Troy as the county seat and a 2026 estimated population of approximately 114,000. Major population centers include Troy (26,305), Piqua (20,533), and Tipp City. 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 $159,300 to $171,700, Miami County's tax burden is notably higher than the national average rate of 1.02%, though the median annual tax bill of $2,118 sits below the national median of $2,400.

Notable cities: Troy, Piqua, Tipp City, West Milton

Median Home

$165,000

Tax Rate

1.33%

Annual Tax

$2,118

Population

114,054

2026 Appeal Deadline: March 31, 2026

For the 2026 tax cycle (tax year 2025), all property tax appeals must be filed by March 31, 2026. The complaint must be received by the Board of Revision or postmarked by this deadline. Late filings are not accepted for that tax year.

Property in Miami County, Ohio — local tax assessment and appeal guide

How Miami County Assesses Property

35%of market value

Assessed by: Miami County Auditor's Office

Assessment cycle: Sexennial (6-year reappraisal with 3-year update)

Notices typically mailed: Spring (typically by mid-April)

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 a County Commissioner. Hearings typically last about 15 minutes where you will present your evidence and answer questions about your property's value. The Board decides on the case following the hearing based on the evidence submitted.

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Step 1: Review your property assessment notice (typically mailed in spring) and verify your current assessed value and market value on the Miami County Auditor's website at https://miamicountyohioauditor.gov

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Step 2: Gather supporting evidence including a professional appraisal report, recent comparable sales from the last 6-12 months in your neighborhood, photographs of property damage or deferred maintenance, repair estimates, and any other documentation that supports your claim of overvaluation

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Step 3: Complete DTE Form 1 (Complaint Against the Valuation of Real Property) accurately with all required information including parcel number, current assessed value, your opinion of value, and detailed justification for the reduction

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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 deadline. Keep copies of all documents for your records

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Step 5: Attend your Board of Revision hearing when scheduled (you will receive at least 10 days advance notice). Present your evidence professionally and be prepared to answer questions from the three-member board consisting of the County Auditor, County Treasurer, and a County Commissioner

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Step 6: Receive the Board's written decision. If your property value is reduced, your taxes will be lowered accordingly. If you disagree with the decision, you may file an appeal within 30 days to the Ohio Board of Tax Appeals (using DTE Form 4) or to the Miami County Court of Common Pleas

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

Filing Methods

mail:Miami County Board of Revision, Miami County Auditor's Office, 201 W Main St, Troy, OH 45373
in-person:Miami County Auditor's Office, 201 W Main St, Troy, OH 45373, Monday-Friday 8:00 AM - 4:00 PM
online:Check with the Auditor's Office at(937) 440-5925 for online filing availability

Evidence to Bring

Professional appraisal report dated near January 1 of the tax yearRecent comparable sales (last 6-12 months) showing similar properties sold for lessPhotographs showing property damage, deferred maintenance, or structural issuesRepair estimates or contractor quotes for major defectsSales contracts or closing statements if property was recently purchased

Miami County Assessor Contact

Miami County Auditor's Office

Phone: (937) 440-5925

Address: 201 West Main Street, Troy, Ohio 45373

Website: https://www.miamicountyohioauditor.gov/

Online Portal: https://www.miamicountyohioauditor.gov/Search

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

Tax Exemptions in Miami County

Homestead Exemption

Up to $25,000 reduction in market value

Reduces the taxable value of owner-occupied homes for eligible seniors and disabled residents

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 (must apply at the Auditor's Office using DTE Form 105A)

Owner Occupancy Credit

2.5% reduction on applicable tax levies

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

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

Disabled Veterans 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: Honorably discharged veterans rated 100% disabled by the U.S. Department of Veterans Affairs, or their surviving spouses. No income limits apply.Deadline: Apply at the Miami County Auditor's Office - application available through the Auditor

Surviving Spouse of Public Service Officer

$56,000 reduction in market value

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

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

Official Resources

Miami County Auditor Property Search →

Official Miami County Auditor website for property search, tax information, and assessment details.

Ohio Department of Taxation - Property Tax Forms →

Access DTE Form 1 and other official Ohio property tax appeal forms and resources.

Ohio Board of Tax Appeals →

File secondary appeals online and access the Ohio Board of Tax Appeals resources and guidance.

Miami County Official Website →

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

Check Your Miami County Assessment

Enter your address to see if your Miami County property is overassessed.

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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 cycle is March 31, 2026. Your complaint must be received by the Board of Revision or postmarked by this date. Late filings are not accepted, and missing the deadline means you cannot challenge your 2025 assessment. The filing period opens January 1, 2026, so it's 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?
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 at 201 W Main St, Troy, OH 45373. You can file by mail or in person during business hours (Monday-Friday, 8:00 AM - 4:00 PM). Your appeal should include evidence such as a professional appraisal, recent comparable sales, photographs of defects, and repair estimates. Contact the Auditor's Office at(937) 440-5925 to obtain the form or check for online filing availability.
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 the taxable portion to $140,000, potentially saving you several hundred dollars annually depending on your local millage rate. New applicants after 2014 must have an Ohio adjusted gross income of $30,000 or less to qualify, though those enrolled before 2014 are grandfathered in without the income requirement.
What happens at a Board of Revision hearing in Miami County?
At a Miami County Board of Revision hearing, you will present your evidence to a three-member panel consisting of the County Auditor, County Treasurer, and a County Commissioner. Hearings typically last about 15 minutes, during which you explain why your property is overvalued and present supporting documentation such as appraisals, comparable sales, and photographs. The Board members may ask questions about your property and evidence. After reviewing all testimony and documentation, the Board will issue a written decision either reducing your value, maintaining the current value, or in rare cases, increasing it. You'll receive at least 10 days advance notice of your hearing date.
How much can I save by appealing my property taxes in Miami County?
The amount you can save by appealing your property taxes in Miami County depends on how much the Board of Revision reduces your assessed value. For example, if your home's market value is reduced from $200,000 to $180,000, your assessed value drops from $70,000 to $63,000 (at the 35% ratio). At Miami County's effective tax rate of 1.33%, this $20,000 market value reduction could save you approximately $93 annually, or nearly $280 over three years. Larger reductions result in greater savings, which is why gathering strong evidence like professional appraisals and comparable sales is critical to maximizing your potential tax reduction.
What evidence do I need for a Miami County property tax appeal?
For a successful Miami County property tax appeal, you need compelling evidence that proves your property is overvalued. The strongest evidence includes a professional appraisal dated near January 1 of the tax year, recent comparable sales from the last 6-12 months showing similar homes sold for less in your area, photographs documenting structural issues or deferred maintenance, and repair estimates for major defects. If you recently purchased the property, bring your sales contract and closing statements. Submit all evidence when you file DTE Form 1 or at least 5 days before your hearing. Organized, factual documentation significantly improves your chances of winning a reduction.
Can I appeal my Miami County property taxes online?
Miami County's online filing capability for Board of Revision appeals should be confirmed directly with the Auditor's Office at(937) 440-5925. While the county has an online property search portal at https://miamicountyohioauditor.gov, the availability of electronic filing for DTE Form 1 may vary. Many Ohio counties have implemented online filing systems for Board of Revision complaints, but it's essential to verify current options. If online filing is not available, you can file by mail (postmarked by March 31) or in person at the Miami County Auditor's Office at 201 W Main St, Troy, OH 45373 during business hours.
What if I disagree with the Miami County Board of Revision's decision on my appeal?
If you disagree with the Miami County Board of Revision's decision, you have 30 days from the date the decision is mailed to file an appeal to a higher authority. You have two options: file DTE Form 4 with the Ohio Board of Tax Appeals in Columbus, or file an appeal with the Miami County Court of Common Pleas. The notice of appeal must be filed with both the Board of Revision and your chosen higher court within the 30-day window, or your appeal will be dismissed. This is a formal legal proceeding, so consulting with a property tax attorney is recommended for these secondary appeals.

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://www.miamicountyohioauditor.gov/ | https://sdglegal.net/ohio-property-tax-deadline-2026/ | https://www.ownwell.com/trends/ohio/miami-county | https://miamicountyauditors.org/ | https://www.co.miami.oh.us/

Last verified: 2026-04-03