OH-KY Tax Reciprocity 2026

OH-KY reciprocity serves the ~250,000 daily Greater Cincinnati/Northern Kentucky commuters.

Quick answer: Yes, active reciprocity. OH residents working in KY file 42A809 (KY Employee's Withholding Exemption Certificate). KY residents working in OH file IT 4NR.

How It Works Both Directions

ScenarioForm To FileResult
Live OH, work KY42A809 (to skip KY)No KY withholding. Pay OH tax only.
Live KY, work OHIT 4NR (to skip OH)No OH withholding. Pay KY tax only.

Worked Example

Amanda lives in Covington KY, works in downtown Cincinnati, earns $78,000. With reciprocity: files IT 4NR with OH employer. OH state withholds $0. KY withholds ~$3,120 (4% flat). Cincinnati city tax 2.1% nonresident = $1,638 — NOT covered by reciprocity. Total state+local: $4,758.

Step-by-Step: Claim the Exemption

  1. Download the work-state exemption form (KY form 42A809 for OH-residents-working-in-KY; OH form IT 4NR for KY-residents-working-in-OH).
  2. Fill in name, SSN, home address (must be in the reciprocity state), and current date.
  3. Submit to HR/payroll at your employer.
  4. Verify on your next paystub that work-state tax withholding is $0.
  5. Update your home-state W-4 to make sure you withhold enough for full income tax.
  6. File only a resident return in your home state next April (unless you have non-wage work-state income).

OBBBA 2026 Note

OBBBA 2026 (One Big Beautiful Bill Act) raised the federal SALT cap to $40,000. This matters for reciprocity commuters who itemize: your full home-state income tax is now more likely to be fully deductible on federal Schedule A, making the state-level tax difference between your home and work state a real after-tax driver of commute value. Check each state rate: OH top rate 3.75% (over $100K), KY top rate 4.0% flat (2026).

FAQ

Does OH-KY reciprocity cover Cincinnati city tax?

No. Cincinnati municipal tax (2.1% nonresident rate) applies to KY residents working in Cincinnati regardless of reciprocity. KY gives a limited credit for it on the KY resident return.

What form does a KY resident working in OH file?

File OH form IT 4NR (Statement of Residency) with your OH employer, indicating KY residency. OH state withholding stops. Municipal and school district withholding continue as applicable.

What’s the 2026 KY income tax rate?

KY transitioned to a 4.0% flat rate for 2026, down from 4.5% in 2024 and 4.0% in 2025. KY has scheduled further cuts conditional on revenue triggers.

Do NKY commuters still owe Cincinnati earnings tax?

Yes. The 2.1% nonresident earnings tax is a Cincinnati city tax, not a state tax, so reciprocity doesn’t apply. It’s withheld by all employers within the city limits.

Can I claim credit for Cincinnati tax on my KY return?

Yes. Use KY form 740 Schedule ITC (Limited Credit for Taxes Paid to Another State or Locality). The credit is limited to the KY state tax you would have paid on the same income.

Model Your Take-Home

See exact post-reciprocity paycheck with OH or KY withholding.

Paycheck Calculator →
Other reciprocity pairs:
NJ-PA · VA-DC · MD-DC · MD-VA · MD-PA · PA-OH · Full matrix

Tax calculations are estimates for educational and informational purposes only. This site does not provide tax, legal, or financial advice. Tax laws change frequently. Always consult a qualified tax professional for advice specific to your situation. Data sourced from IRS publications and official state tax authority websites.

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