Tax noncompliance describes a range of activities that are unfavorable to a state's tax

Tax

To tax is to impose a financial charge or other levy upon a taxpayer by a state or the functional equivalent of a state such that failure to pay is punishable by law. Taxes are also imposed by many subnational entities...

 system. These include tax avoidance

Tax avoidance

Tax avoidance is the legal utilization of the tax regime to one's own advantage, to reduce the amount of tax that is payable by means that are within the law. The term tax mitigation is a synonym for tax avoidance. Its original use was by tax advisors as an alternative to the pejorative term tax...

, which refers to reducing taxes by legal means, and tax evasion

Tax evasion

Tax evasion is the general term for efforts by individuals, corporations, trusts and other entities to evade taxes by illegal means. Tax evasion usually entails taxpayers deliberately misrepresenting or concealing the true state of their affairs to the tax authorities to reduce their tax liability,...

 which refers to the criminal non-payment of tax liabilities.

Groups that do not comply with taxes include tax protesters and tax resisters

Tax resistance

Tax resistance is the refusal to pay tax because of opposition to the government that is imposing the tax or to government policy.Tax resistance is a form of civil disobedience and direct action...

. Tax protesters attempt not to pay tax believe that they have discovered interpretations of the law that show that they are not subject to being taxed, whilst tax resisters refuse to pay a tax for conscientious reasons (because the resister does not want to support the government or some of its activities).