term:

Tax Shelter

tax shelter n

: an entity (as a partnership) or investment plan or arrangement whose principal purpose is the avoidance or evasion of income tax
;also
: an interest offered or purchased on the premise that it will provide favorable tax consequences [purchased limited partnership tax shelters]

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.