New cash ISA rules for 2027

18 July 2026 ISAs are getting more complicated - here’s what is changing. The government wants to encourage retail investors to invest in growth rather than just save cash 1 . So it is changing some of the rules. Cash ISA limit reduced to 12k, and you’ll pay tax on interest in non Cash ISAs Here’s a quick summary: The overall ISA contribution limits of £20,000/year for over 18s aren’t changing.…