Offer your thoughts or opinion on the input financial query or topic using your financial background.

Work on the side for my wife's company
Depending on how much freelance work we're talking about you could set up a limited company, with you and your wife as directors. By invoicing all your work through the limited company (which could have many other benefits for you, an accountant/advisor would... well, advise...) it's the company earning the money, not you or her personally. You can then pay your wife up to £10,000 per year (as of writing this) without income tax kicking in. You would probably have to pay yourself a small amount to minimise exposure to HMRC's snooping, but possibly not... as far as I'm aware the rules do not state anything about working for free, for yourself - and I wouldn't worry about the ethics, you're already paying plenty into HMRC's bank account through your day job! Some good information here if you're interested: https://www.whitefieldtax.co.uk/web/psc-guide/pscguide-how-does-it-all-work-in-practice-salaries-and-dividends/