Does Kentucky use the federal W-4?
Federal withholding is driven by Form W-4. Kentucky has its own withholding process, and employers may use Kentucky-specific forms or settings for state withholding.
W-4 withholding planning
Kentucky W-4 Withholding Calculator
Estimate how federal W-4 entries, Kentucky withholding, additional withholding, and dependents affect each Kentucky paycheck.
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Kentucky · 2026 tax year · salaried or hourly
How much and how often you’re paid.
How are you paid?
Gross pay method
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Use flat 22% federal supplemental rate?
The IRS allows employers to withhold federal income tax from bonuses / supplemental wages at a flat 22% rate.
Required for accurate Social Security and Medicare surtax estimates mid-year.
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Updates as you type
Key points
The 2020+ federal W-4 uses dollar amounts instead of withholding allowances.
Additional federal or Kentucky withholding lowers net pay now but can reduce a tax bill later.
Dependents and deductions affect federal withholding differently from Kentucky's flat tax calculation.
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What to check
1Enter your gross pay and filing status.
2Add W-4 Step 3 credits, Step 4 income/deductions, and extra withholding where relevant.
3Compare the result against your current paycheck to decide whether your W-4 needs review.
Common questions
Will changing my W-4 change my final tax owed?
A W-4 changes withholding during the year, not the final tax law. It helps align paycheck withholding with the tax you expect to owe when you file.