I have an expensive hobby that I put many hours into in my spare time. I get a few thousand a year from selling a few things but my all costs are significantly higher, it's a hobby I do for enjoyment not to make money. Do I need to do a self assessment? The thought of keeping every receipt and all the stress and hassle just sucks the joy out of what is simply a hobby. Can I just not do it? What happens if I don't do it? Fines... prison?!! Thanks in advance! Ps don't want to say what hobby is as quite niche.