One way to minimize taxes on year-end bonus checks is by contributing to retirement accounts. By maximizing contributions to a 401(k) or IRA, you can reduce your taxable income. Another strategy is to take advantage of deductions and credits. This includes deducting business expenses, charitable donations, and education expenses. If you anticipate a higher tax bracket in the future, consider deferring your bonus to the following year. Lastly, consult with a tax professional or financial advisor to ensure you are using all available strategies to minimize taxes legally and effectively. Being proactive and knowledgeable can help you keep more of your hard-earned bonus.