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Kentucky Bonus Tax Calculator

Estimate take-home pay on a bonus, using the federal flat-rate supplemental withholding method

Estimate only — not tax advice. Federal tax on the bonus uses the flat 22% supplemental withholding rate (37% on cumulative supplemental wages over $1,000,000/year) — the alternative "aggregate method" some employers use instead is not modeled. FICA and any state SDI/PFL are computed as the difference between your regular income with and without the bonus added, so the Social Security wage cap applies correctly. State tax on the bonus is a marginal-bracket estimate, not necessarily any special state supplemental rate. See methodology below for source and last-verified date.

How Kentucky Paycheck Tax Is Calculated (2026)

Source: Kentucky Department of Revenue
Flat state rate3.50%
Standard deduction (single)$3,270
state_tax = max(0, gross_income - 3270) × 0.035

Federal Tax & FICA (shared across all states)

Filing statusStandard deduction
Single$16,100
Married Filing Jointly$32,200
Head of Household$24,150
Federal brackets (all filing statuses)10% / 12% / 22% / 24% / 32% / 35% / 37%
Social Security6.2% up to $184,500 wage base
Medicare1.45% on all wages, +0.9% above $200,000 single/HoH, $250,000 MFJ

⚠️ Kentucky's married-filing-jointly and head-of-household state brackets have not yet been independently verified against the primary source above — this calculator uses Kentucky's single-filer brackets as an estimate when those statuses are selected.

⚠️ Many Kentucky cities and counties levy a local occupational/payroll tax. Louisville/Jefferson County, Lexington-Fayette, Covington, Florence, and Owensboro are now computed via the selector above (one combined rate per jurisdiction — Kentucky's county+city stacking is not fully modeled); 87 of Kentucky's 120 counties levy this tax in total, so most jurisdictions are still not covered.

Guideline version 2026-KY-v1 · Last verified 2026-07-26

Kentucky Paycheck Calculator FAQ

What is Kentucky's state income tax rate?

Kentucky charges a flat 3.50% rate for tax year 2026. Standard deduction: $3,270 for single filers.

How much is take-home pay on $65,000 in Kentucky?

On a $65,000 gross salary, a single filer in Kentucky takes home roughly $52,246.95/year (about $4,353.91/month) after federal tax, FICA, and state tax — before any local tax.

What deductions does Kentucky apply before taxing my income?

Kentucky applies a $3,270 standard deduction, before the flat 3.50% rate. See the "How Kentucky Paycheck Tax Is Calculated" section above for the exact formula.

Does this estimate change if I'm married or have dependents?

This calculator uses single-filer figures only (v1 scope). Married filing jointly typically uses different federal and Kentucky state brackets and a larger standard deduction — your actual take-home pay will differ. Dependents can also reduce federal withholding via the W-4. Check Kentucky Department of Revenue's married-filing-jointly tables for a precise figure.

Does this calculator include Kentucky local or city income tax?

Many Kentucky cities and counties levy a local occupational/payroll tax (e.g. Louisville ~2.2%), not computed here.

Methodology & Source

Kentucky state tax figures sourced from Kentucky Department of Revenue (https://revenue.ky.gov/), citing Ky. Rev. Stat. § 141.020 — cut to 3.5% effective 2026-01-01. Federal brackets, standard deductions (single/MFJ/HoH), and FICA constants sourced from the IRS (Revenue Procedure 2025-32; married-filing-jointly Additional Medicare threshold of $250,000 is a separate, unindexed statutory figure). Kentucky's married-filing-jointly and head-of-household figures are not yet independently verified and currently fall back to single-filer brackets — see the caveat in the formula section above.

Local tax figures sourced from Kentucky occupational license tax (county + city ordinances; KY Secretary of State occupational tax database). Rates cross-checked against two independent secondary sources 2026-07-29 (ustaxdisputes.com, countrytaxcalc.com). Bowling Green was excluded — sources disagreed (1.85% vs 2.00%) rather than guessed between. Boone, Kenton, and Campbell Counties were excluded for lacking a second independent source in this pass. Kentucky is unusual in that county AND city occupational taxes can stack (e.g. a Louisville Metro resident working in a specific suburb can owe an additional city-level tax on top of the Metro rate) — this selector offers one combined rate per major jurisdiction rather than modeling every stacking combination; actual liability may be higher in a stacking situation. 87 of Kentucky's 120 counties levy this tax; only 4 major jurisdictions are covered below.

Bonus federal withholding uses the flat supplemental-wage rate (22%, 37% above $1,000,000 cumulative supplemental wages/year), per IRS Publication 15 (Circular E), Employer's Tax Guide, 2026 edition — the alternative "aggregate method" is not modeled.

This is an estimate based on standard single-filer federal, FICA, and KY state calculations. Actual withholding may differ based on your W-4 elections, pre-tax deductions, and other factors.

Guideline version: 2026-KY-v1 · Effective: 2026-01-01 · Last verified: 2026-07-26