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Kentucky Bonus Tax Calculator 2026

How much tax will you pay on your bonus in Kentucky? Use our free 2026 bonus tax calculator to see federal supplemental rate (22%) + Kentucky state tax withholding.

🎁 Bonus Tax Calculator 2026

See how much of your bonus you'll actually take home

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$
Required for aggregate method
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Year-to-date wages already paid (helps calculate SS cap)
Estimated After-Tax Bonus
$0.00
Your Take-Home Bonus
Gross Bonus—
Federal Tax Withholding—
Social Security (6.2%)—
Medicare (1.45%)—
Kentucky State Tax—
Total Tax—
Net Bonus (Take-Home)—
Effective Tax Rate on Bonus: 0%
💡 Aggregate tip: The aggregate method may result in higher withholding but more accurately matches your total tax liability. If your salary puts you in the 22% bracket and you select the supplemental method, your withholding will likely match your actual tax — no surprise bill at filing.

How Bonus Taxes Work in 2026

The IRS classifies bonuses as supplemental wages. There are two methods your employer can use to calculate federal income tax withholding on your bonus:

Supplemental Rate Method (Most Common)

Your employer withholds a flat 22% federal income tax on bonus amounts up to $1,000,000. For amounts over $1 million, the rate increases to 37%. This is the simplest method and is used by most payroll systems. However, if your actual marginal tax rate is higher than 22% — such as 32%, 35%, or 37% — you will owe additional tax when you file your return.

Aggregate Method

Your employer combines your bonus with your most recent regular paycheck and calculates withholding as if the total were a single payment. This often results in more tax withheld but more closely matches your actual tax liability, reducing surprises at tax time.

Kentucky Bonus Tax Treatment

Kentucky taxes bonus income as regular wages at the standard state income tax rate of 3.50%. Our calculator automatically applies the correct Kentucky state tax to your bonus amount.

Bonus Tax FAQs

Bonuses are classified as supplemental wages by the IRS. Employers can withhold federal income tax using either the flat supplemental rate (22% for amounts under $1 million, 37% for amounts over $1 million) or the aggregate method (combining your regular pay and bonus).
The 2026 federal supplemental withholding rate is 22% for bonus amounts up to $1,000,000. For amounts exceeding $1 million in a single payment, the rate is 37%. Your actual tax may differ based on your total annual income.
Most states tax bonuses as regular income. Some states have a flat supplemental withholding rate. Our calculator applies the correct Kentucky tax treatment to your bonus payment.
The supplemental rate (22% flat) is simpler and often results in less withholding if your effective rate is lower than 22%. The aggregate method calculates withholding as if the bonus were part of your regular paycheck, which more accurately reflects your total tax liability but may result in higher withholding.