Managing your investments

ISA mistakes to avoid in 2026

Dan Coatsworth shares an ISA checklist for UK investors, highlighting the most common ISA mistakes to avoid in 2026, from choosing the wrong ISA and paying unnecessary fees to misunderstanding ISA rules. Learn how to make the most of your £20,000 ISA allowance, avoid “use-it-or-lose-it” pitfalls, and improve tax efficiency with smarter habits.