Rachel Reeves has set her sights on one of the UK’s quieter problems. Too much household wealth sits in cash, earning modest interest and not enough flows into the stock market that companies rely on to grow.
Her answer is a shake-up of the ISA system that gently steers more people toward investing without stripping away the safety of cash.
From April 2027, the overall £20,000 annual ISA allowance stays put but with a twist. At least £8,000 of it must go into stocks and shares, effectively capping the cash ISA allowance at £12,000.
The idea is to channel more retail money into equities, which policymakers hope will deepen the pool of capital available to listed companies and help revive London’s markets.
It is a practical bit of behavioural economics. A compulsory equity slice is meant to break the habit of defaulting to cash, which many savers treat as a risk-free holding pen.
More than 40% of current cash ISA users deposit over £12,000 a year, so a sizeable group will be prodded into investing whether they planned to or not.
The Treasury has made one concession. After criticism that the shift would hit pensioners hardest, anyone over 65 will still be able to place the full £20,000 into a cash ISA.
That recognises that older savers often prefer the predictability of cash to the swings of the market.
The broader aim is straightforward: get more retail investors owning shares. Britain once had a far stronger culture of direct equity ownership than it does today.
The government hopes that nudging savers towards the market will both diversify household wealth and give UK companies a larger domestic investor base.
Whether this sparks a genuine revival in retail investing is unclear, but it is at least an attempt to change long-standing habits.