It depends, if you are on the UK, you will have to pay taxes for all your earnings, only because you are on the UK.
But it only applies if you are looking to make a living from this "freelancer work"
Im a web developer/designer and wondered if its worth getting paid in bitcoin? Im from the UK and not sure how it would work in terms of the end of year tax return.
I suggest you to do it, only if you are aware of how your taxes for cryptos works in your country, i do not know how they work at 100% because i am not from there, but in my country it works almost by the same way.
You need to pay 10% over all your earnings