Savings providers and City representatives are meeting HM Revenue & Customs (HMRC) today for talks on the future of tax-free ISA accounts, following changes announced in the Budget by Chancellor Rachel Reeves.

The discussions come amid growing concern from the savings and investment industry about plans that could see cash held within stocks and shares ISAs become subject to tax penalties.

Industry representatives are urging HMRC not to impose charges on cash balances that are temporarily held within investment accounts.

They argue savers need flexibility to hold money in cash within stocks and shares ISAs for short periods without being penalised.

The meeting follows an initial consultation call held on December 17, with full details of the new regulations expected to be published later this year.

Revised ISA rules are due to come into force from April 2027 and will affect millions of people who use ISAs to save or invest.

Under Budget measures announced last November, the existing £20,000 annual tax-free ISA allowance will be reduced.

From April next year, savers under the age of 65 will see the allowance cut to £12,000.

The remaining £8,000 of the current allowance will have to be invested rather than held as cash.

HMRC said shortly after the Budget that it would take action against savers attempting to bypass the new limit.

This includes individuals who try to hold excess cash within stocks and shares ISAs rather than using a cash ISA.

The tax authority also set out plans to ban so-called cash-like investments from stocks and shares ISAs.

These proposals represent one of the most significant changes to ISA eligibility rules in recent years.

Under the planned reforms, transfers from stocks and shares ISAs or innovative finance ISAs into cash ISAs will also be prohibited.

Investment platforms said these restrictions risk penalising ordinary savers who use cash holdings for legitimate reasons.

Providers warned that investors often need to hold cash temporarily while waiting to invest or rebalance portfolios.

One industry source told The Telegraph: “There’s a way of achieving the policy aim without everyone having to pay a tax charge HMRC would just have to state that cash in stocks and shares ISAs must be held for the purpose of investing.”

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The source said HMRC could rely on checks and audits to ensure savers are not stockpiling cash.

They added that such an approach would meet policy objectives without disadvantaging consumers.

Camilla Esmund, of platform Interactive Investor, said: “There are many sound reasons why individuals may need to park money into cash for short periods of time, so the proposed implementation of any penalties on cash held in stocks and shares ISAs will need to reflect this, with sufficient time for consumers to act, and clear enough notice.”

Industry figures have warned the changes could create additional complexity for savers.

They said this could undermine confidence in ISAs as a straightforward and accessible savings product.

Andrew Gall, head of savings and economics at the Building Societies Association, said: “We warned that cutting the cash Isa subscription would add complexity and could damage the overall Isa brand.”

Mr Gall said it was important for the Government to confirm the final rules as soon as possible.

He added that providers need sufficient time to prepare systems and communicate changes to customers.

A Government spokesman said ministers are working closely with the sector on the reforms.

They said: “To encourage greater investment in stocks and shares, we’re developing changes to ISA rules which will prevent circumvention of the new lower cash ISA limit.”

They added that clear guidance would be issued well in advance of the changes taking effect.