If it's in the child s name, they don't pay tax on the interest. So I have mine held in trust for them until they are 21. Of course I can take the money out and use it for them / give it to them before that date.
If it's in your name and you have another source of income that takes you above the minumim threshold , you will have to pay tax .
That's my understanding as a non financial person.
I'm another parent who wouldn't be happy putting in in their name to have at 16. You can do the best possible job bringing them up and still have them go off the rails a bit as a teenager.
Also they might have a BF or GF who says
" it's your money, how dare your parents tell you to spend it on a deposit for a flat / university fees , let's buy a sports car / take all our pals to Lanzarote"
I confess that when I was in my mid 20s ( so not exactly a teenager) and saving for a deposit on a flat, my BF at the time tried REALLY hard to get me to spend it on a caravan his mum was selling " as an investment ".
I wish I could tell you that I dumped him straight away, but I didn't
. No MN then to tell me about red flags.
I did LTB a few months later. But it would have been so easy to go along with it . Everyone said what a great guy he was and how lucky I was to have him
.
So I am not misguided enough to think that I can guess when they are born what my kids will be like at 16 .