State Guide

How to Appeal Your Property Taxes in Ohio (2026 Guide)

Published July 12, 2026

If you own a home in Ohio, your county auditor sets its true value — what the county believes it would sell for — and that number, not the smaller figure on your bill, is the one you challenge. Every year there's a fixed statutory window to contest it before it locks in, and in Ohio that window closes on March 31.

The Ohio deadline: March 31

Ohio's appeal window closes on March 31 of the year after the tax year — so a challenge to your 2025 value is due March 31, 2026 — set by Ohio Rev. Code §5715.19. (The statute technically allows until the close of first-half tax collection if that falls later, but March 31 is the date to plan around.) You file a Complaint Against the Valuation of Real Property, known as DTE Form 1, with your county Board of Revision — the panel made up of the county auditor, treasurer, and a commissioner (or their representatives).

Because it's a fixed statutory date rather than a rolling "X days after your notice" deadline, it's easy to plan around — but generally you get one complaint per three-year reappraisal cycle unless something like a sale or a value change qualifies you to file again, so it's worth getting right. If the Board of Revision's decision doesn't go your way, the next rungs are the Ohio Board of Tax Appeals or your county's Court of Common Pleas.

How Ohio assesses your home

Here's the part that trips up most Ohio owners: your bill shows a taxable value that is only 35% of your home's true value — Ohio Admin. Code 5703-25-05, authorized by Ohio Rev. Code §5715.01, which caps the assessed percentage at 35%. A home the auditor values at $300,000 shows a $105,000 taxable value, and your millage is applied to that $105,000.

That 35% figure is not what you appeal, and it is not evidence you're over-assessed. Your complaint contests the true (market) value — the 100% number — and the 35% taxable value falls right along with it if you win.

Category	Ohio
Assessment basis	Taxable value = 35% of true (market) value (OAC 5703-25-05); you appeal the 100% true value
Appeal deadline	March 31 of the following year (§5715.19) — March 31, 2026 for 2025
Where you file	County Board of Revision, via DTE Form 1
Assessment cap	None — value tracks the market; HB 920 caps taxes (effective millage), not value
Can the board raise your value?	Yes — it can increase or decrease on your own complaint

One thing Ohio does not have is an acquisition-value or growth cap on your assessment — there's no California-style limit holding your value below the market. The state's HB 920 reduction factors and the owner-occupancy rollback lower your tax, not your value, so a successful appeal that cuts your true value flows straight through to a lower bill.

Building your case

Because the whole question is your home's true (market) value, the winning evidence is recent, nearby comparable sales — homes like yours that actually closed, similar in size, age, and condition — not listing prices or online "Zestimate"-style guesses. Ohio is a disclosure state, so sale prices are public and the board expects to see them. Three or four solid comps with clear adjustments are far harder to wave off than a complaint that the number "feels high."

One Ohio-specific caution: the Board of Revision independently determines value and can increase as well as decrease it on your own complaint — and the single biggest risk is your own recent purchase price. If you bought recently for more than the auditor's value, that sale is treated as strong evidence of what the home is worth, and the board can move your value up to it. So file only when your comps clearly support a lower true value; if you recently paid above the auditor's number, an appeal may work against you. (Ohio Rev. Code §5715.13 even bars the board from lowering a value without a sworn written application — the process runs on evidence, not a hunch.)

Filing at the county level

Every Ohio county runs its own Board of Revision, and the mechanics — where to submit DTE Form 1, whether your county takes it by mail or through an online portal, and the board's hearing calendar — vary across all 88 counties. We're building out county-specific guides with the exact filing office and local notes. In the meantime, use PROppeal to pull licensed comparable sales for your address and confirm the filing logistics with your county auditor.

Get your case built

You don't need to wait on a county-specific guide to start. PROppeal pulls licensed comparable sales for your address, values your home against Ohio's true-value standard (not the misleading 35% figure), and gives you a straight answer on whether your assessment is out of line — before March 31 arrives.

Property tax rules and deadlines vary by jurisdiction and can change — verify with your county before relying on this.