Cash into Vanguard SS ISA to use up ISA allowance for 23/24

[MrBen.911]

I find myself with a few quid spare just before the end of the tax year. I've not maxed out my ISA allowance - I have a Vanguard SS ISA which I've not put anything into this year, and a Cash ISA elsewhere which I have put less than the allowance into.

The cash ISA is one of those fixed rate deals where all funds have to be put in within the first 30 days, so I can't add to that.

Ultimately I want to keep these funds as Cash, not invest into Stocks and Shares.

I believe I can put these into Vanguard now, and leave uninvested as Cash, and that will count to this year's allowance. Then, next week, in the new tax year, transfer these funds from the SS ISA to a new Cash ISA.

I can't see a downside, but am I missing anything?

[steve_n]

I'm in exactly the same position. The only thing you're missing is quite often the best cash ISA rates only apply on new subscriptions and won't accept transfers in. However, you can transfer the extra out of your S&S ISA as a partial amount into an accepting cash ISA.

Thankfully from next tax year it will cease to be an issue.