Property Taxes in Columbus (OH)

1. How Ohio property tax actually works

Ohio taxes real property through a county-based ad valorem (per-value) system administered by each county's own elected County Auditor — there are 88 counties statewide, six of which contain this market's 25 places (Section 4). The auditor determines each property's "true value" (market value) through a mandated sexennial reappraisal (a full, in-depth revaluation every six years) with a triennial update at the three-year midpoint that adjusts values using recent local sales data without a full physical review, both required under Ohio Revised Code 5715.33 (Lake County Auditor).

From there, Ohio applies a uniform 35% assessment ratio statewide: a property's taxable assessed value is calculated at 35% of its auditor-determined true value, and local mill levies apply to that assessed value, not the full market price (SmartAsset; PropertyTaxByState.com). On its own, a flat 35% ratio would make a homeowner's bill rise and fall directly with reappraised value — but Ohio pairs it with a second, genuinely distinctive mechanism that changes that relationship substantially: House Bill 920 (1976), codified at Ohio Revised Code 319.301, which requires most voted (levy-based) millage to be automatically reduced — via a district-specific "tax reduction factor" — whenever total property values in that taxing district rise, so the same pool of existing properties generates roughly the same total dollar revenue the levy was originally voted to raise, not a windfall from rising values alone. The effective rate homeowners actually pay is the voted millage rate multiplied by (1 minus that reduction factor), recalculated district by district at each reappraisal and update (Cuyahoga County Treasurer).

HB 920 is worth naming plainly because it's mechanically different from a Truth-in-Taxation-style public-hearing brake used elsewhere: it applies automatically and silently to voted levies without a public rate-setting hearing, and because the reduction factor is calculated as a district-wide average, an individual property whose value rises faster than its district's average can still see a higher bill even while the district's overall levy revenue stays flat, and one that rises slower can see a lower bill — a real, documented effect in Franklin County's own reappraisals (Hilliard Beacon). HB 920 also carries a long-standing carve-out called the 20-mill floor: school districts whose voted millage would otherwise be reduced below 20 total mills are exempted from further reduction, so reappraisal-driven value growth still increases school revenue once a district hits that floor — a common situation for growing Columbus-area districts. A December 2025 reform package (House Bill 186, together with HB 335 and HB 124) caps how much additional revenue districts sitting at the 20-mill floor can collect from reappraisal growth, limiting it to roughly the three-year GDP deflator rather than the full increase in value, with the cap phasing in starting with second-half 2026 tax bills; this is recent, still-phasing-in law, so confirm current status before relying on it for a specific district (Ohio School Boards Association; News and Sentinel).

For broader tax-climate context: Ohio's state income tax is now a near-flat structure, with a single 2.75% rate applying to income above $26,050 and no state tax on income at or below that threshold, and the state sales tax rate is 5.75%, with county and transit add-ons pushing the combined rate to around 7.3% on average statewide and 8% in Franklin County specifically (Tax Foundation; Avalara).

2. The 10% and 2.5% owner-occupancy credits

Ohio runs two long-standing, state-reimbursed credits that reduce a homeowner's bill on qualifying levies, though both now apply on a shrinking, legacy basis rather than universally. The 10% "non-business" (rollback) credit applied broadly to owner- and non-owner-occupied residential and agricultural property alike, while an additional 2.5% "owner-occupancy" credit applied only to a property that was the owner's primary residence as of January 1 of the tax year, with only one property per household eligible. Both credits were funded by a state reimbursement to local taxing entities rather than coming out of local levy revenue directly. A 2013 state budget change (effective for levies first voted after that year) ended both credits for any new levy passed afterward, so a given property's actual combined discount now depends on how much of its total millage sits on pre-2013 legacy levies versus newer ones (Lucas County Auditor; Hilliard Beacon).

This is an active area of change worth flagging rather than treating as settled: the same December 2025 reform package referenced in Section 1 restructures these two credits going forward, phasing the owner-occupancy credit up toward roughly 15.38% on qualifying pre-2013 levies by around 2029 while phasing the separate 10% non-business credit down and eventually out (with an exception preserved for agricultural land), according to reporting on the bill's legislative sponsor (News and Sentinel). The exact year-by-year phase-in schedule and how it applies to a specific property's specific levies wasn't independently re-confirmed beyond that reporting — check a current bill or your county auditor's own explanation directly rather than assuming the figures above are still current by the time you're reading this. Neither credit requires a separate application in the way the Homestead Exemption does (Section 3); where it applies, it's calculated automatically into the tax bill.

3. The Homestead Exemption for seniors and disabled Ohioans

Ohio's Homestead Exemption is a separate, application-based program layered on top of the credits in Section 2, aimed specifically at lower-income seniors, permanently and totally disabled homeowners, and certain surviving spouses. For the standard category — homeowners age 65 or older, or certified permanently and totally disabled, or the surviving spouse of a prior participant who is at least 59 — the current household income threshold is a modified adjusted gross income below roughly $40,000 for the 2025 tax year (based on 2024 income) and $41,000 for the 2026 tax year (based on 2025 income), with Social Security income excluded from that calculation; a qualifying household then has the first $29,000 of the home's appraised value exempted from taxation (Butler County Auditor). A separate, higher-value category with no income test at all covers disabled veterans with a 100%-service-connected disability (and their surviving spouses) and surviving spouses of public service officers killed in the line of duty, exempting the first $58,000 of home value for that group (Butler County Auditor). Homeowners who were already enrolled in the program before the 2014 income test took effect generally keep their exemption regardless of current income under a grandfather provision.

The exemption must be applied for through the property's home county auditor and isn't granted automatically; because the income thresholds are indexed and adjusted periodically by the state, confirm the exact current-year figure with your county auditor's homestead office before assuming the numbers above still apply, especially given the broader property-tax reform activity described in Sections 1 and 2.

4. Effective property tax rates by county

Ohio's statewide average effective property tax rate runs meaningfully above the national average by most independent measures, though the exact figure varies by source and methodology: Tax Foundation puts it at 1.36% of owner-occupied home value (ranking Ohio 39th on its 2026 State Tax Competitiveness Index, a lower rank indicating a heavier relative burden), PropertyTaxByState.com puts it at 1.31%, and SmartAsset's own calculator puts it slightly lower at 1.22% — a real, sourced spread reflecting normal year-to-year and methodology variance rather than a contradiction (Tax Foundation; PropertyTaxByState.com; SmartAsset). County-level effective rates vary further, and this market's six counties span a real range:

Every figure above is a county-wide effective rate (tax paid as a share of value after the assessment ratio, reduction factors, and typical credits), not a raw millage figure, and blends every overlapping taxing jurisdiction within that county. A specific address's actual combined rate depends heavily on which school district, city or township, and special levies it sits inside — Franklin County alone contains dozens of distinct taxing districts with materially different combined millage — so confirm the current combined rate for a specific address with that county's own auditor rather than relying on a county-wide average (PropertyTaxByState.com, Franklin County; SmartAsset).

5. Appealing your assessment: the county Board of Revision

A property owner who believes their county auditor's valuation is wrong appeals to that county's Board of Revision — a three-member panel made up of the County Auditor, County Treasurer, and a County Commissioner (or their designated representatives) — by filing DTE Form 1 ("Complaint Against the Valuation of Real Property") directly with the county auditor's office. The filing window runs January 1 through March 31 of the year following the tax year at issue, and hearings are quasi-judicial, open to the public, and typically scheduled in roughly 30-minute slots with supporting evidence due several days beforehand (Lucas County Auditor; Ohio Department of Taxation, DTE Form 1). A property owner dissatisfied with the Board's written decision can further appeal to the state Board of Tax Appeals or the county Court of Common Pleas, generally within 30 days of the decision being mailed.

Because this deadline sits inside each year's own calendar and the exact filing mechanics (mail, email, or an online portal) vary somewhat county to county, confirm the current year's precise deadline and required documentation directly with the auditor's office in whichever of the six counties above the property sits before relying on this page for a specific appeal.

6. How we keep this page current

The structural mechanics in Sections 1 through 3 — the county auditor-assessed system, the 35% statewide assessment ratio, the HB 920 tax reduction factor and 20-mill floor, the owner-occupancy credits, and the Homestead Exemption's basic eligibility categories — are settled Ohio law, though several of the exact dollar and percentage figures inside them (the Homestead income threshold, the owner-occupancy credit phase-in percentages) are exactly the kind of numbers a legislature revisits on its own schedule, and Ohio is in the middle of an active, multi-bill property-tax reform push as of this writing (Sections 1-2). Two gaps are flagged rather than guessed at: the exact year-by-year phase-in schedule for the restructured owner-occupancy and non-business credits beyond what a single news report described (Section 2), and Pickaway County's effective rate, confirmed in only one of the two sources checked (Section 4) — both worth a direct check with the relevant county auditor or the Ohio Department of Taxation. If you spot something on this page that's changed, or notice a broken link, we'd like to know — see our contact information.