Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Is it necessary to pay tax if someone lends me money to put into my mortgage?
I can't vouch for Australian law, but in the US there is actually a recognized mechanism for "in-family loans" which ensures that it's all fully documented for tax purposes, including filing it as an official second mortgage. (Just did that recently in my own family, which is why I'm aware of it.) We're required to charge at least some interest (there's a minimum set, currently around 0.3%), and the interest is taxable income, and it is wise to get a lawyer to draw up the paperwork (there are a few services which specialize in this, charging a flat fee of about US$700 if the loan is standard enough that they can handle it as fill-in-the-blank), but outside of that it's pretty painless. This can also be used as a way of shifting gift limits from year to year -- if you issue a loan, and then gift the recipient with the payments each year (including the payments), you've effectively spread the immediate transfer of money over multiple years of taxes. Of course it does cost you the legal paperwork and the tax in the interest (which they're still "paying" out of your gift), but it can be a useful tool, and it's one that wasn't well known until recently. Again: This is all US codes, posted only for comparison (and for the benefit of US readers). It may be completely irrelevant. But it may be worth investigating whether Oz has something similar.