Stocks and shares ISAs: everything you need to know

Some big ISA rule changes are coming in from 6 April 2027. They mostly impact cash ISAs. But there are downstream consequences for stocks and shares ISAs, too. We’ll briefly summarise the stocks and shares ISA changes here, and then press on with the main business after that. 6 April 2027 stocks and shares ISA rule changes The new rules are intended to prevent investors from treating their stocks and shares ISAs as cash ISAs. The annual allowance remains at £20,000 per year for a stocks and shares ISA. From 6 April 2027, however, a 22% flat rate charge will be imposed upon any cash interest earned within a stocks and shares ISA. The charge is administered by your ISA manager. You do not need to declare it on your tax form. The Personal Savings Allowance will not apply. The flat-rate charge applies to everyone regardless of age. The flat-rate charge does not apply to non-cash interest. It’s not levied on money market fund interest, for example. If money market funds are the only…