DS18 and £20,000 junior ISA - any advice on what to advise him?

[SweetDaff]

My son is due a child investment ISA inheritance at 18. Which is in about 18 months time. This is due to his grandmother putting some money in every month over the years. The investment child ISA grew significantly.

I should add that we are a low-income family, live in a council flat etc, so this is a lot of money! I think I got £20 on my 18th birthday!! .

However, there is a good chance he will still be is school at 18. In some ways he is fairly careful with money, but is can also be an irresponsible nightmare at times; loves clothes, designer ones I'm afraid. Which I think is completely ridiculous at his age and income, but moving on ...

The windfall is too little to be life-changing. But it is a great lump sum to have in the background for sure. It would be a shame though if it made him lazy, or he just wittered it all away.

Anyone been in this position? Any advice?

I was thinking of posting this in AIBU, but maybe Teenagers is better?

My two also inherited over £100k but their grandmother didn’t want them to have it until they were 26 and so gave it to me to manage until then. They don’t even know. They also have a smaller amount coming, c. £8000, and will, I’m pretty sure, spend with enthusiasm, despite my advice to be sensible. We’ll see.