The British government has unveiled fresh regulations targeting individuals who store large cash balances in investment accounts. Under the new rules announced by HM Revenue and Customs (HMRC), interest earned on cash savings held within stocks and shares ISAs will be hit with a flat 22 per cent tax rate. The restriction forms part of a broader strategy designed to prevent savers from bypassing upcoming limits on traditional cash accounts.
The intervention builds upon reforms introduced by Chancellor Rachel Reeves in the previous year’s budget. Beginning in April 2027, the annual allowance for standard cash ISAs will drop from £20,000 to £12,000 for savers aged under 65. Because the annual limit for stocks and shares ISAs will remain at £20,000 to encourage investment, officials grew concerned that individuals would exploit the gap. The new 22 per cent levy is specifically designed to stop savers from holding uninvested cash or moving funds into fully cash-like low-risk money market funds within an investment wrapper to maintain tax-free returns.
Concurrently, the Treasury launched a consultation on a revamped first-time buyer ISA. In contrast to the existing Lifetime ISA (LISA), which is set to be phased out alongside a lower cash ISA cap, the new product will feature no upper age limit for new savers. Officials stated this move acknowledges the reality of rising property entry ages. While the new account preserves the 25 per cent state bonus, the incentive will only be distributed upon a home purchase. Additionally, the government will abolish the controversial 25 per cent penalty on non-purchase withdrawals, which previously ate into savers’ core capital.
The response from the financial sector has been deeply divided. Representatives from the Building Societies Association and Nationwide welcomed the clarifications, noting that the regulations ensure a level playing field and safeguard the higher £20,000 allowance preserved for savers over 65.
However, multiple investment platforms and advocacy bodies warned that the measures would introduce significant bureaucracy. Analysts from AJ Bell and InvestEngine argued that adding complex age brackets and unexpected tax liabilities risks alienating consumers entirely. Critics contend that rather than motivating a shift toward stocks, the complex system might simply cause cautious savers to disengage and hoard their money in traditional cash accounts.
HMRC is set to commence technical consultations with industry firms shortly. The formal regulations are scheduled to be laid in autumn ahead of their implementation date on 6 April 2027.
