Short answer
£750/month could become roughly £255,000 by 18
Total contributions would be £162,000. With 5% annual growth, a 0.25% annual fee assumption, and no starting balance, the projected Junior ISA value is £255,299 nominally, or about £163,689 in today's money using 2.5% inflation.
- Annual allowance
- £9,000
- Monthly equivalent
- £750
- Projected value
- £255,299
This is a large number because it assumes the allowance is filled every year from birth until age 18. That is a useful upper-bound scenario, not a normal household budget.
Educational projection only. This is not financial advice or a promise of investment returns. Tax-year allowances can change.