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Tool: 賞与・ボーナス手取り税金計算機 — 無料オンライン計算ツール | HomeCalcPro | 印刷日時:
賞与・ボーナス手取り税金計算機 — 無料オンライン計算ツール | HomeCalcPro
賞与・ボーナス手取り税金計算機の即時・高精度シミュレーションと計算式。
Bonus Amount & Supplemental Withholding
Supplemental Bonus Withholding Formula
Transparent mathematical methodology explained in plain English.
Net Bonus = Gross Bonus - (Gross Bonus × (FedRate + FICA + StateRate))Under IRS regulations, supplemental wages (bonuses) are commonly withheld at a flat 22% federal rate (37% for amounts over $1M), plus mandatory 6.2% Social Security and 1.45% Medicare, plus state supplemental rates.
Variables Explained:
- Gross Bonus: Lump-sum bonus amount before taxes.
- FedRate: IRS statutory supplemental flat rate (22%).
- FICA: Social Security (6.2%) + Medicare (1.45%) = 7.65%.
- StateRate: State supplemental withholding rate.
$10,000 Year-End Bonus in California
Estimating statutory withholding and net check amount.
- Federal income tax withholding (22% flat): $10,000 × 22% = $2,200.00.
- Social Security withholding (6.2%): $10,000 × 6.2% = $620.00.
- Medicare withholding (1.45%): $10,000 × 1.45% = $145.00.
- State tax withholding (CA ~6.6%): $10,000 × 6.6% = $660.00.
- Total statutory deductions: $2,200 + $620 + $145 + $660 = $3,625.00 (36.25%).
- Estimated net bonus payout: $10,000 - $3,625 = $6,375.00.
よくある質問 (FAQ): 賞与・ボーナス手取り税金計算機
Click any question below to expand quick answers, formulas, and expert tips.
Why are bonuses taxed higher on paychecks?
Bonuses are not taxed at a higher overall rate on your annual return, but employers are required by the IRS to withhold supplemental wages at a flat statutory rate (often 22% federal + FICA + state), which may feel higher than standard paycheck withholding.
建築基準および安全に関する注意事項: Actual tax liability on bonuses is determined at annual tax filing based on your total annual income and tax bracket. Withholding rates represent statutory deductions by employers and may differ from your true final tax liability.