Work in Kentucky, Live in Ohio: How Taxes Work

Reciprocity

Do Kentucky and Ohio Have a Tax Reciprocity Agreement?

Yes. Kentucky and Ohio maintain a reciprocity agreement for individual income tax. Under Kentucky law, an Ohio resident is not liable for Kentucky income tax on wages and salaries earned in Kentucky, because Ohio grants the same treatment to Kentucky residents. The same applies in reverse for Kentucky residents working in Ohio.

Ohio has reciprocity agreements with five bordering states: Indiana, Kentucky, Michigan, Pennsylvania, and West Virginia. Kentucky maintains reciprocal agreements with Illinois, Indiana, Michigan, Ohio, Virginia, West Virginia, and Wisconsin. Ohio residents appear on Kentucky's Form 42A809, which certifies nonresident status for withholding purposes.

Reciprocity covers wages and salaries only. Gambling income and distributive share income (Schedule K-1) are not exempt, and neither are wages an S corporation pays to a shareholder-employee who owns 20% or more. An Ohio resident with other Kentucky-source income files Form 740-NP for it.

The agreement also does not extend to local taxes. Kentucky counties and cities levy occupational license taxes on compensation earned for work done in their area, regardless of where the employee lives. These local obligations survive the reciprocity agreement and remain the worker's responsibility.

For Ohio residents commuting across the river to Northern Kentucky, the reciprocity agreement eliminates any Kentucky state return obligation on wages. The key step is filing Form 42A809 with your Kentucky employer.

Filing Obligations

Which Tax Return Do I File as an Ohio Resident Working in Kentucky?

File only your Ohio IT 1040 return. Report all income, including your Kentucky wages, as part of your total income. The reciprocity agreement transfers the taxing right to your home state, so Kentucky wages are treated the same as Ohio-earned income on your return.

You do not need to file a Kentucky individual income tax return (Form 740 or 740-NP) as long as your only Kentucky income is from wages covered by reciprocity. If you also earned non-wage income in Kentucky, such as rental income from Kentucky property, you may need to file Kentucky Form 740-NP for that portion. Gambling winnings from Kentucky sources and distributive share income (Schedule K-1) are also not covered by reciprocity.

For 2026, Ohio's tax on nonbusiness income is $332 plus 2.75% of the amount over $26,050, figured after an exemption for you, your spouse and each dependent; if the balance is $26,050 or less, no tax is imposed on it. The Ohio return is due April 15. If you lived in a taxing Ohio school district, you also owe school district income tax on the SD 100.

The Key Form

How Do I Stop Kentucky from Withholding State Tax?

File Kentucky Form 42A809, Certificate of Nonresidence, with your Kentucky employer. This form certifies that you reside in a state with a reciprocity agreement and authorizes the employer to stop withholding Kentucky income tax from your pay.

You must complete the form and file it with your employer before the employer can stop withholding. The form requires your name, Social Security number, Ohio home address, and your signature certifying you are not a Kentucky resident. There is one exception: Ohio residents who hold a 20% or greater direct or indirect equity interest in an S corporation cannot use this exemption for their shareholder-employee compensation from that entity.

Form 42A809 only stops Kentucky withholding. An employer that maintains an office or transacts business in Ohio must withhold Ohio income tax; give it Ohio Form IT 4, which also covers school district tax. If no Ohio tax is withheld and your Ohio tax, less withholding, will be more than $500, make estimated payments on Form IT 1040ES; the 2026 due dates are April 15, June 15 and September 15, 2026, and January 15, 2027.

Keep a copy of the submitted Form 42A809 with your tax records.

Local Taxes in Kentucky

Do I Still Owe Kentucky Local Occupational Tax?

Yes. Kentucky's local occupational license taxes apply to anyone who works within a taxing jurisdiction, regardless of residency. The state reciprocity agreement covers only Kentucky state income tax. Local taxes are a separate obligation tied to where work is performed.

In Northern Kentucky, the 2026 county rates are: Boone County 0.8% on gross pay up to $79,494, plus a 0.15% mental health tax on the first $16,666; Kenton County 0.6997% on wages up to the Social Security wage cap; Campbell County 1.05%, the sum of three levies (0.90% and 0.10% up to $184,500 and 0.05% up to $50,000). Cities add their own tax, for example Covington at 2.45%, and there is no credit of a city fee against a county fee unless the county and city agree. Louisville Metro charges nonresidents a combined rate of 1.45% covering the occupational license fee and transit authority tax.

Every employer must withhold the local tax a tax district imposes on the compensation. Local tax is not included in, or refunded through, the Kentucky state return.

Ohio does not offer a credit on your state return for Kentucky local taxes paid. Some Ohio municipalities may allow partial credits for local taxes paid to jurisdictions outside Ohio. Check with your Ohio city's tax office for specific credit rules.

Local Taxes in Ohio

Does Ohio Municipal Income Tax Apply to My Kentucky Wages?

It depends on your city of residence. Ohio cities and villages may levy a municipal income tax on residents and on people who earn income there, at one uniform rate; a rate above 1% needs the approval of the voters. For a resident it applies to wages earned anywhere, including Kentucky.

If you live in Cincinnati, the rate is 1.8%, and if your employer did not withhold it, you must file a Cincinnati return.

Many Ohio municipalities offer a credit for local taxes paid to another jurisdiction. Because Kentucky occupational taxes are local taxes paid to a Kentucky city or county, some Ohio cities accept them as a partial credit against your residential municipal tax. Ohio law lets each city decide whether to give such a credit and how much; Cincinnati, for example, allows credit up to 1.8% for tax paid to another locality.

Contact your Ohio city's income tax division to determine your exact obligation and any credits available for Kentucky occupational taxes already withheld from your pay.

Worked Example: Ohio Resident Earning $70,000 in Boone County, KY (2026)

Single filer, $70,000 of wages from a job in unincorporated Boone County, tax year 2026. Ohio tax uses R.C. 5747.02 for 2026 and the 2025 exemption of $2,150 (MAGI $40,001 to $80,000), because the 2026 exemption was not yet published. Ohio city and school district tax where you live is not included.

Remote Work

What If I Work from Home in Ohio for a Kentucky Employer?

For state tax, remote days change nothing: reciprocity already exempts your wages from Kentucky income tax, and Ohio taxes them as a resident either way.

Kentucky county occupational taxes apply by law to compensation for work done in the county, so days you work from your Ohio home are generally outside them. Check your county's own rules, though: Boone County's 2026 rate sheet says that any employee working in Boone County or receiving compensation deriving from Boone County is subject to its tax. Keep a dated log of where you work and ask your employer's tax district how remote days are treated.

Your Ohio city of residence, if it levies a municipal income tax, taxes your wages wherever you earn them.

Mid-Year Move

What If I Moved Between Ohio and Kentucky During the Year?

If you changed your permanent residence from one state to the other during the year, file as a part-year resident in each state. In Ohio, part-year residents enter the dates they lived in Ohio. Income earned while a nonresident of Ohio is not eligible for the Ohio resident credit, but it may be eligible for the nonresident credit (IT NRC).

In Kentucky, file Form 740-NP as a part-year resident. Report the income earned during the months you were a Kentucky resident plus any Kentucky-source non-wage income earned as a nonresident. The reciprocity exemption applies only during the period you lived in Ohio, and it does not apply to anyone who lives in Kentucky for more than 183 days during the tax year.

Document your exact move date. Utility activation records, lease or closing dates, and driver's license changes serve as evidence. Keep the dates handy: Ohio asks part-year residents for the dates they lived in Ohio.

Withholding Errors

What If My Employer Withheld Kentucky State Tax by Mistake?

If your Kentucky employer withheld Kentucky state income tax instead of Ohio tax, file Kentucky Form 740-NP-R: a qualifying full-year nonresident with wages only from a reciprocal state may use it to get a refund of all Kentucky income tax withheld. Enclose Schedule KW-2 and a copy of the return you filed with Ohio.

On the Ohio side, file your IT 1040 as usual. You will not receive credit for Kentucky state withholding on your Ohio return. Any Ohio tax due must be paid in full, and you recover the Kentucky withholding separately through the 740-NP-R refund process.

To prevent this from recurring, submit Form 42A809 to your employer immediately. Confirm on your next pay stub that Kentucky withholding has stopped, and give an employer that does business in Ohio Form IT 4 so Ohio tax is withheld. If your employer cannot switch to Ohio withholding, make estimated tax payments to Ohio using Form IT 1040ES to avoid underpayment penalties at filing time.