Tax avoidance and tax evasion both involve paying less in taxes, but one is perfectly legal and the other is a federal crime. Tax avoidance means using legal strategies to reduce your tax bill, such as contributing to a retirement account, claiming deductions you're entitled to, or timing the sale of investments to qualify for lower rates. Tax evasion means deliberately hiding income, falsifying records, or misrepresenting information on your tax return to pay less than you legally owe. The IRS actively pursues tax evasion and penalties can include large fines and prison time. Every taxpayer has the right to arrange their finances to minimize taxes within the law, but crossing into dishonesty or fraud is a serious criminal matter.