There are lots of discussions on here and other money-related forums. It’s almost a FAQ.
In short, you have NO legal recourse if little Johnny or little Imogen turns out to be a total and wants to spend all the money on holidays and drugs. It’s their money, you will have no say whatsoever on it once they turn 18.
Some people say their child is different, but
- many parents cannot judge their children objectively
- if children are very young now, it’s impossible to predict how they’ll turn out at 18
- the world is full of sibling born into the same family, same DNA, same family values, same education, yet one may be responsible and the other may be a total
So there is a risk. Is this risk worth it? Well, it depends on your situation and the alternatives.
The key question is: what is your tax situation and are you absolutely sure there would be much of a tax advantage in putting the money in a junior isa vs in your name? What’s your tax band? Do you have lots of other shares? Could you use your own ISA allowance or do you already max that out?
How much capital gains do you make on your own? The first £11k capital gains or so (look up the exact details) are tax free, after which they are taxed at 10% or 20% depending on your tax band. That’s per person, so the same applies to your partner. With the amounts you are talking about, there is a chance you wouldn’t pay much tax on capital gains. You might pay taxes on dividends, but there is a £2k allowance for that.
Also, you can’t “take the money out at 17” – it’s their money, you cannot move it from an account in their name to one in yours.