New tax on Americans working in CanadaU.S. net investment income tax to fund ‘Obamacare’By Kevyn Nightingale03/18/2013|Canadian Payroll Reporter|Last Updated: 03/20/2013 Effective Jan. 1, the United States introduced a tax called the Net Investment Income Tax to help fund the Patient Protection and Affordable Care Act (PPACA) — more commonly referred to as “Obamacare.”This tax is equal to 3.8 per cent of an employee’s investment income if his total earnings are above the following:• US$250,000 for a married couple filing jointly To Read the Full Story, Subscribe or Sign In Remember Me Forgot Password If you are a current Subscriber, please click here to set-up or update your login information.