The FBT rates are moving up progressively but these are only for existing contracts (leases) that were in place prior to budget night 2011. Any new lease entered into since then, or if you make a change (change balloon, refinance etc) to a pre-budget night lease, is at the flat 20% rate. Employers also like an allowance because it takes all the admin away from them and all the risk; when you are on an allowance you get the freedom to choose your own car but then the risk in terms of proving it is tax deductible, maintaining log book etc falls on the employee. As pointed out above there can be a significant admin burden in administering novated leases and in fact some companies do charge their staff an admin fee Nick - yes it increases your taxable income but at the risk of stating the obvious, that's because you've pocketed the difference. Despite what most people tend to think, you only pay tax on money you earn (less deductions of course), so it isn't as if you're being 'penalised' by having to go into a higher tax bracket. You have received an allowance which you haven't fully expended so naturally you should pay tax on that amount