I've never thought I'd this as a side hustle, but obviously it is!
I'm a Non Executive Director for other companies.
The two current NED roles I have bring in £12k gross per annum, for 1-2 days work every 3 months. Depending on meeting cycles and locations, I either fit a virtual call during my work day, or take annual leave to travel.
As I have finance and risk management skills, I get approached on almost a weekly basis to do more, however my issue is time, and that I have none to spare! The last role which approached me was offering £25k gross.
I fill in a tax return as I'm an additional rate taxpayer, so obviously include this income.
Eventually I'd like to give up the day job, and just maintain a NED portfolio, but I need a few more, paying more, to do so!