PSI Tax Rules for Consultants in Australia If you're a high-earning IT contractor, management consultant, engineer, or professional firm partner, there's a persistent myth doing the rounds: set up a company or family trust, funnel your income through it, and your tax rate magically caps out at 25% or 30%. Some go further and assume they can split that income with a lower-earning spouse to dodge the top marginal bracket entirely. At Aevum Accounting, this is one of the most da