The Inland Revenue Department has clarified its stance after a landmark Supreme Court decision in the so-called "Penny and Hooper" tax avoidance case last week.
Christchurch orthopaedic surgeons Ian Penny and Gary Hooper used company structures and family trusts to artificially lower their salaries and avoid paying the top personal income tax rate.
In a unanimous decision last Thursday, the Supreme Court agreed with an earlier Court of Appeal ruling that "income derived from personal exertion should belong in its appropriate taxation band and should not be inappropriately diverted away".
In an alert issued yesterday, the IRD said it would closely examine situations in which arrangements had the effect of diverting large amounts of "personal exertion income", which was still enjoyed - directly or indirectly - by the individual, or family or associates.
"We will generally focus on the most serious and artificial cases - where the arrangement results in a substantial proportion of the income generated by the business being diverted away from the individual service providers," the IRD said.