Tax avoidance is the legal utilization of the 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...

 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 avoidance. The term has also been used in the tax regulations of some jurisdictions to distinguish tax avoidance foreseen by the legislators from tax avoidance which exploits loopholes in the law.