The Cash ISA Cap: Why Savers Must Now Invest
From 6 April 2027, UK savers under 65 will only be able to shelter 12,000 pounds a year in a cash ISA, down from the current 20,000, with the remaining 8,000 pounds of the tax-free allowance only usable in a stocks and shares ISA, an innovative finance ISA or a Lifetime ISA. This video explains how the Autumn Budget 2025 reform works, why the government wants savers moving cash into the stock market, what happens to money already saved, and why an earlier, more drastic 4,000 pound cap was dropped after pushback from building societies.
It covers who is exempt - savers aged 65 and over keep the full 20,000 pound cash allowance - the new restriction on transfers from investment ISAs into cash ISAs, the 22 per cent tax on cash left inside a stocks and shares ISA, and what savers can still do before the rule starts. Presented as general information, not personal advice.
Educational documentary. Not financial or investment advice.
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Sources and credits
Primary sources
- HM Treasury, Autumn Budget 2025 Announcement, 26 November 2025 - the cash ISA cap to 12,000 pounds for under-65s from 6 April 2027.
- GOV.UK, ISA Reform 2027: Anti-Circumvention Rules Factsheet, November 2025 - the ban on transfers from investment ISAs into cash ISAs, and the 22 per cent tax charge on cash held in stocks and shares ISAs.
- UK Parliament, Treasury Committee Government Response, 18 December 2025 - the Committee's objection to using a cap to force investing.
- Building Societies Association, press statements and open letter, 2025 - the warning that lower cash ISA deposits could raise mortgage costs.
Not regulated financial advice.