Project the tax-free growth of your Stocks & Shares or Cash ISA with regular annual contributions.
All growth inside an ISA is free of UK income and capital gains tax, so this is a straightforward compounding projection: each year's contribution is added, then the whole balance grows at your expected return.
Illustrative estimate only, using simplified/rounded 2026/27 UK figures — not tax advice. Always confirm with HMRC or a qualified UK tax adviser.