We've seen some great credit card sign-up bonuses hit the market so far this year. In fact, some have been worth more than $500 to new cardholders. Hopefully you've been able to take advantage of at least one and are expecting either a big cash back check or a free holiday vacation using all the rewards points you've banked. If you are expecting a large cash back check from your credit card company, you may also be wondering if Uncle Sam will want his piece of it next tax season too. After all, if there's anything the government claims it needs more of these days, it would be tax revenues! So, does the IRS actually consider your credit card rewards to be taxable income?