Does Ohio have a state income tax?

Yes—Ohio has a state income tax system described on IT 1040. Progressive brackets; local taxes may apply.

What form do I file for Ohio?

Most residents use IT 1040 for the state return, subject to exceptions for part-year residents and special situations. Always confirm the latest state instructions each filing season.

Does BasilTax calculate Ohio state tax?

BasilTax is focused on federal accuracy for Ohio today; you should still review state-specific rules and forms outside the app until engine support ships.

Ohio State Income Tax (2026) — Guide

Ohio state income tax

Last updated: 2026-04-27

TL;DR / ELI5

Ohio taxpayers generally file IT 1040 and pay state income tax based on progressive brackets on taxable income after state-specific adjustments. Progressive brackets; local taxes may apply. BasilTax currently focuses on federal accuracy for this state—check back as coverage expands so you can verify withholding and key lines against your W-2 and other forms.

Primary form: IT 1040

BasilTax engine: Not yet — federal plus manual state review

Structure: bracket

Progressive brackets; local taxes may apply.

Ohio income tax at a glance

This guide explains how Ohio fits into your overall filing picture. Your federal Form 1040 is only half the story—states add their own definitions, subtractions, credits, and withholding rules.

Most Ohio residents will prepare IT 1040 alongside the federal return. Progressive brackets; local taxes may apply.

Withholding and W-2 boxes

If you work in Ohio (or your employer withholds for Ohio), compare boxes 15–17 on your Form W-2 to what you expect on the state return. Mismatches here are a common source of balance due surprises.

Credits, deductions, and quirks

State returns often start from federal adjusted gross income (AGI) and then apply state-specific subtractions, additions, credits, and alternative minimum taxes. Read your state instructions for the exact list—this page is a hub, not a substitute for official guidance.

Verification workflow

Upload your PDFs, assign them to a return, and run compute. When BasilTax supports Ohio end-to-end, you can trace state lines to the same documents you used for federal. When support is still in progress, use BasilTax to lock down federal and broker schedules first, then complete Ohio manually with confidence.

Ready to tie every line to your documents?

Upload your W-2s and 1099s—BasilTax extracts fields, computes federal and state, and explains each number with citations.

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Frequently asked questions

Does Ohio have a state income tax?: Yes—Ohio has a state income tax system described on IT 1040. Progressive brackets; local taxes may apply.
What form do I file for Ohio?: Most residents use IT 1040 for the state return, subject to exceptions for part-year residents and special situations. Always confirm the latest state instructions each filing season.
Does BasilTax calculate Ohio state tax?: BasilTax is focused on federal accuracy for Ohio today; you should still review state-specific rules and forms outside the app until engine support ships.