Junior ISA UK: The Complete 2026/27 Guide

The 2026/27 Junior ISA allowance is £9,000 per child, paid in by anyone, growing tax-free

A Stocks and Shares JISA almost always beats a Cash JISA over an 18-year horizon

The money legally belongs to the child and they get full control at 18

£100 per month from birth at 7% growth becomes roughly £43,000 by age 18