What is Kentucky Form K-4?
Kentucky taxes wages at a flat 3.5%, so the K-4 is only needed to claim one of four exemptions from Kentucky withholding (no tax liability expected, Fort Campbell, nonresident military spouse, or living in a reciprocal state) or to ask for additional withholding each pay period.
What’s on Kentucky Form K-4
The 2026 edition has 2 pages. FileIt asks for it in 6 parts, and it is signed by Employee:
- Your detailsEmployee
- Check if exemptEmployee
- Military spouse worksheet (box 3)Employee
- Reciprocal state worksheet (box 4)Employee
- Additional withholdingEmployee
- SignatureEmployee
Fill out Kentucky Form K-4 online with FileIt
- Pick the person. Choose someone from People and FileIt fills in their name, date of birth, address and other details it already knows.
- Answer plain-language questions. One part of the form at a time, with the official help text beside each question — 23 fields in all. Your answers save as you go.
- Check the live preview. Watch your answers land on the real Kentucky Department of Revenue form, and let FileIt do any worksheet arithmetic.
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Start Kentucky Form K-4 now — it’s freeOfficial sources
- Blank form (PDF), published by Kentucky Department of Revenue: https://revenue.ky.gov/Forms/42A804%20(K-4)%20(2026).pdf
- Official instructions and guidance: https://revenue.ky.gov/Forms/Pages/default.aspx
- Edition shown on this page: 42A804 (K-4)(12-2025), tax year 2026 (checked 2026-09-28).
FileIt is not affiliated with or endorsed by Kentucky Department of Revenue or any government. This page explains the form in general terms and is not legal, tax or immigration advice. Always read the official instructions, and check that you are using the edition the recipient accepts.