JayW;292655 wrote:You can write to them declaring the divided income and ask that they take the tax via your tax code. With any luck they won't ask you to register for self-assessment.
This. I'd suggest writing to HMRC as soon as TY 23/24 is finished, explain your situation and ask them to advise how you should proceed.
When I was PAYE rather than working freelance, I was in and out of Self Assessment a couple of times over the years depending on how much CGT, dividend and other income I had. Generally, if you go over the various allowances, they ask you to complete SA. Using the portal is pretty straightforward provided you keep decent records – it calculates everything automatically and shows you a working for the tax calc which is actually really useful in helping you to see how the tax system works in practice. Before I did SA, some of the tax rules and allowances seemed mind-bendingly abstract.