To calculate bonus tax, your employer usually withholds a flat 22% federal rate (or 37% for bonuses over $1M) using the Percentage Method, or combines it with regular pay (Aggregate Method). The bonus is also subject to Social Security (6.2%) & Medicare (1.45%), plus state/local taxes, but you'll reconcile the final amount at tax time, potentially getting a refund if 22% was too high.
Bonuses are considered “supplemental income,” which simply means money you earn over and above your regular paycheque. In Canada, this supplemental income is subject to income tax, just like your regular salary. In other words, your regular salary and your bonus are subject to the exact same amount and type of tax.
The tax rate that you will pay on your bonus will depend on the income bracket that you fall into in the 2024/2025 tax year: Basic rate: for earners making between £12,571 to £50,270, your bonus will be taxed at 20%. Higher rate: for those making between £50,271 to £150,000, your bonus is taxed at 40%.
National Insurance contributions (NICs) are also payable on bonuses. For example, if you earn £40,000 annually and receive a £4,000 bonus, it could be taxed at 20% (basic rate) and 8% for NICs, leaving you with significantly less in take-home pay.
The amount of tax you pay depends on your total income, including the bonus. For example, if you're in the standard tax band of 20%, your €5,000 bonus would be taxed at 20%, meaning you'd pay €1,000 in tax. Universal social charge: On top of Income Tax, your bonus is also subject to the Universal Social Charge (USC).
Why is tax withholding on bonuses so high? Since bonuses are paid in addition to your normal paycheck, taxes are withheld at a higher rate than your regular wages. This is because they are considered supplemental income.
The general rule is that employees are taxed at the rate of the marginal tax bracket in which they fall. Let's explain: if their salary is between R 1 and R 216 200, they are in the 18% tax bracket and therefore their bonus will be taxed at 18%.
You can't entirely avoid taxes on a bonus, but you can significantly lower the amount by contributing to tax-advantaged accounts (401(k), IRA, HSA), deferring the bonus to a year you expect to be in a lower tax bracket, or making charitable donations, thereby reducing your taxable income or increasing deductions at tax time.
Your bonus was likely taxed at 32% because employers use special IRS rules for "supplemental wages," often applying a higher flat withholding rate (like 22% or sometimes higher if combined with regular pay in the aggregate method) or pushing you into a higher tax bracket temporarily, but you'll get any over-withholding back as a refund at tax time since bonuses are taxed at your actual income tax rate eventually, not a permanent higher one.
In California, bonuses are classified as supplemental wages and subject to special withholding rules rather than treated as ordinary wages. A flat withholding rate of 10.23% applies to all bonuses in California, regardless of the employee's regular income bracket.
The IRS allows two primary methods for taxing bonuses. The percentage method uses a flat 22% federal tax rate. This method is straightforward but could result in over-withholding for some individuals. The aggregate method combines your bonus with your regular earnings and then calculates taxes based on the total.
Bonus contributed pre-tax to super
For example, tax on a $50,000 bonus: Paid to you and your marginal tax rate is 32.5% = $16,250. Paid to you and your marginal tax rate is 37% = $18,500.
Yes, it is true you are allowed to change your W-4 to ensure less withholdings on your bonus pay. However, the ramifications of such a change may be unknown until tax filing time. Generally, it is better to leave your W-4 alone and have the extra withholdings.
There are two primary ways to calculate a bonus: percentage-based (based on a percent of the employee's salary) and flat-rate (a fixed figure). Calculating a percentage-based bonus may seem more complicated, but only takes a little bit of math. Here's an example of a yearly bonus calculation formula to guide you.
How much does California tax bonuses? California's supplemental wages tax rate is currently 10.23% for bonuses and stock options, and 6.60% for other types of pay.
Keep in mind that a bonus may push you into a higher tax bracket. But, you are subject to a higher rate only on the portion of income that falls into that bracket.