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Ohio Business Interest Deduction

Ohio Business Interest Deduction 2026

An Ohio business-interest deduction check needs the federal section 163(j) calculation first, then the OH return treatment. Keep loan statements, business-use records, Form 8990 workpapers when required, and state return adjustments separate from personal interest expenses.

Primary taxpayer

Ohio resident or filer evaluating business interest deduction

Federal check

Review the IRS deduction or income reporting rule first

State check

Ohio return treatment and 3.5% top state rate

Canonical route

/deduction/business-interest/ohio/

What matters for 2026

  • Use this exact state page when the search intent names both the deduction topic and the state.
  • Separate the federal deduction, state return treatment, and local filing records before estimating savings.
  • Verify the current-year IRS and state source links before taking a filing position.

Next step

Use the main deduction guide for calculator inputs, eligibility checks, related forms, and broader federal rules.

Open the full guide

Planning workflow

  1. 1Confirm whether the federal itemized, above-the-line, credit, exclusion, or income-reporting rule applies.
  2. 2Review Ohio filing instructions separately instead of assuming the federal result carries over.
  3. 3Keep source documents, worksheets, receipts, and return workpapers together for audit support.
  4. 4Use the linked LevyIO guide for broader calculator inputs, then return to this page for the state-specific checklist.

Records to keep

  • Federal form or worksheet tied to the deduction topic
  • Ohio return instructions, schedules, or state workpapers
  • Receipts, statements, confirmations, or logs supporting the amount
  • A short note showing how federal and state calculations differ

Primary sources

IRS Form 8990IRS Form 8990 is used to figure the business interest expense limitation under section 163(j).IRS Publication 535Explains business expense deduction rules and interest expense context.Ohio Department of Taxation individual tax formsOfficial Ohio tax forms and instructions for checking state return treatment.