TL;DR: From 6 April 2024, UK savers have been able to subscribe new money into more than one Cash ISA with different providers in the same tax year, provided the total subscriptions across all Cash ISAs do not exceed the annual ISA allowance (20,000 pounds in 2026-27, shared across the four main ISA types). Before 6 April 2024 the rule was one Cash ISA subscription per tax year. The reform was part of a wider package designed to simplify the ISA regime, and it now allows savers to spread new subscriptions across multiple Cash ISAs, drip-feed into the best rates as they appear, and combine fixed-rate and easy-access products in the same year. Existing ISAs from previous tax years could already be held with different providers; the 2024 change only affected new subscriptions.
Last reviewed May 2026
The Individual Savings Account (ISA) rules have evolved over more than 25 years. One of the longer-standing restrictions was the "one of each type per tax year" rule, which limited savers to subscribing new money into one Cash ISA, one Stocks and Shares ISA, one Innovative Finance ISA and one Lifetime ISA in any single tax year. The 2024 reform changed this for the first three categories.
This guide explains the current rule on holding multiple Cash ISAs, the difference between subscribing to a new Cash ISA and holding existing Cash ISAs from previous years, the 20,000 pound annual allowance and how it splits across providers, the transfer rules for moving Cash ISA money between providers, and the practical implications of the change for UK savers.
The rule before and after April 2024
Before 6 April 2024, the ISA rules allowed a saver to subscribe new money into only one Cash ISA per tax year. A saver who put money into a Cash ISA in April and then found a better rate elsewhere in July could not open a second Cash ISA that tax year without breaching the rules. The fix was either to transfer the existing ISA (which providers were sometimes slow to process) or to wait for the next tax year.
From 6 April 2024, the rule changed: savers can now subscribe to more than one Cash ISA in the same tax year, with different providers, provided the total subscriptions across all Cash ISAs do not exceed the annual ISA allowance. The same change applied to Stocks and Shares ISAs and Innovative Finance ISAs. The Lifetime ISA still has the one-per-tax-year subscription rule, with its own 4,000 pound allowance within the overall 20,000 pound limit.
The reform was announced in the Autumn Statement 2023 and brought in through ISA Regulations changes from 6 April 2024. It addressed the historical anomaly that a long-standing ISA rule had become out of step with the way savers actually want to manage their cash holdings.
The 20,000 pound annual allowance
The total ISA allowance for the 2026-27 tax year is 20,000 pounds. This is the total new money a saver can put into ISAs across all four types (Cash, Stocks and Shares, Innovative Finance, Lifetime) in the tax year. Within that 20,000 pound limit, the Lifetime ISA has its own 4,000 pound annual sub-limit.
If a saver subscribes 12,000 pounds to Cash ISAs (split across two or more providers), they can subscribe up to 8,000 pounds to Stocks and Shares ISAs (or Innovative Finance ISAs) in the same year. The allowance is "use it or lose it": any unused allowance does not carry forward to the next tax year.
Transfers between ISAs (for example, moving money from a Cash ISA with one provider to a Cash ISA with another) do not count against the annual subscription allowance. The transferred money retains its ISA status and the saver's annual subscription quota is unaffected by the transfer. Transfers should be done through the receiving provider's ISA transfer process, not by withdrawing and re-depositing the money.
Why a saver might want multiple Cash ISAs in one tax year
The new flexibility helps in several practical scenarios. A saver who locked into a 1-year fixed-rate Cash ISA in April for half the allowance can put the remainder into an easy-access Cash ISA later in the year for liquidity, without worrying about breaking the old rule. A saver who finds a better rate in July can subscribe to a new Cash ISA with the better-rate provider for the remaining allowance, rather than transferring the existing balance.
A saver wanting to ladder fixed-rate Cash ISAs (with different maturity dates so that money matures and can be reinvested or accessed at intervals) can now do this within a single tax year, with different providers and different maturity dates, rather than waiting a year between subscriptions.
A saver who wants to spread money across more than one bank for FSCS compensation purposes (the Financial Services Compensation Scheme covers up to 85,000 pounds per banking group) can now subscribe new ISA money to multiple Cash ISA providers in the same year. This is a relevant consideration for savers with large ISA balances that might exceed the FSCS limit with a single provider.
Transfers between Cash ISAs across providers
An ISA transfer moves the money (and the ISA tax-free status) from one provider to another. Transfers can be done at any time and are not limited to specific dates. Cash ISA to Cash ISA transfers normally complete within 15 working days under the ISA Transfer Service rules. Cash ISA to Stocks and Shares ISA (or the reverse) is also possible and the same time limits apply.
To transfer, the saver fills in a transfer form with the new (receiving) provider. The new provider contacts the existing provider and arranges the transfer. The saver should never withdraw the money and re-deposit it themselves: doing so converts the ISA money to non-ISA money, losing the tax-free status.
Current-year subscriptions can be transferred in full (the whole amount subscribed in the current tax year must move together). Previous-year subscriptions can be transferred in whole or in part, so a saver can split a previous year's Cash ISA balance across multiple new providers if they want.
The interaction with the Personal Savings Allowance
Cash ISAs pay interest tax-free regardless of the saver's tax band. This is the core benefit. Non-ISA savings interest is also partly tax-free through the Personal Savings Allowance: basic-rate taxpayers can earn 1,000 pounds of savings interest a year tax-free outside an ISA; higher-rate taxpayers 500 pounds; additional-rate taxpayers nothing.
For savers whose total non-ISA savings interest is below their Personal Savings Allowance, the tax saving from putting money in a Cash ISA is zero in any given year. The case for the Cash ISA is then about future-proofing: if interest rates rise or the saver's tax band changes, the ISA-held money continues to be tax-free, whereas non-ISA savings might become taxable.
For savers whose non-ISA savings interest exceeds the Personal Savings Allowance, the Cash ISA produces an immediate tax saving on the interest. This typically applies to savers with larger savings balances (above about 35,000 pounds at current rates for a basic-rate taxpayer) or those holding savings in higher-interest products.
Choosing between Cash ISA providers
The Cash ISA market has roughly 100 providers in the UK, with rates varying materially. The headline rate is the first metric, but other factors matter: whether the rate is fixed or variable; the access conditions (instant access, notice period, fixed term with penalty for early withdrawal); whether ISA transfers in are accepted; the provider's FSCS protection status (or, for some non-UK providers, the equivalent national scheme); and the provider's customer service reputation.
Best-buy tables (published by MoneyHelper, Bank of England statistics, and various comparison sites) show the leading rates. Rates change frequently in response to Bank of England base rate movements and individual providers' competitive positioning. The right Cash ISA is the one that best matches the saver's access needs and rate appetite at the time of subscription.
For savers using the new multi-provider flexibility, the practical approach is to subscribe to one Cash ISA early in the tax year (for the certainty of using the allowance), then keep an eye on rates and subscribe to a second or third Cash ISA with a different provider as opportunities arise. This is the kind of management that was effectively impossible under the old one-per-tax-year rule.
The non-residence and joint-account caveats
ISAs are individual accounts: there is no joint ISA. Each adult can subscribe up to their own 20,000 pound allowance into ISAs in their own name. A married couple or civil partners can therefore subscribe up to 40,000 pounds between them across separate ISAs each year.
UK residency is required for ISA subscriptions. Savers who move abroad cease to be eligible to subscribe new money to ISAs from the date they leave the UK (except for certain Crown servants and their spouses). Existing ISA holdings continue to be tax-free in the UK, but no new subscriptions can be made until the saver becomes UK-resident again.
An ISA cannot be subscribed for a person who is not the saver. ISA money is the saver's own property and cannot be a gift or trust arrangement for someone else. Junior ISAs (JISAs) operate separately for children under 18 with their own annual subscription limit.
How we verified this
This article reflects the Individual Savings Account Regulations 1998 (as amended), the changes to the ISA Regulations effective 6 April 2024 introduced through the Spring Finance Bill 2024, HMRC's published guidance on ISAs, the Financial Services Compensation Scheme rules on deposit protection, and the Bank of England's monthly money and credit statistics on the savings market. Specific allowances and rates are set annually; the linked GOV.UK pages hold the current detail.
Disclaimer: This article is general information about UK Cash ISA rules and is not personal financial advice. The right ISA mix depends on individual circumstances, including the saver's other savings, tax position and access needs. The ISA rules are set by HMRC and can change at future budgets; the linked GOV.UK pages hold the current position.
Frequently asked questions
Can I have 2 Cash ISAs with different providers?
Yes, since 6 April 2024 UK savers can subscribe new money into multiple Cash ISAs with different providers in the same tax year, provided the total across all Cash ISAs (and other ISA types) does not exceed the 20,000 pound annual allowance. Before 6 April 2024 the rule was one Cash ISA subscription per tax year. Holding existing Cash ISAs from previous years with different providers was always permitted.
How does the 20,000 pound ISA allowance work across multiple providers?
The 20,000 pound annual allowance is the total new money a saver can put into all ISAs (Cash, Stocks and Shares, Innovative Finance, Lifetime) in a single tax year. The allowance is shared across providers and types. A saver could put 10,000 pounds into a Cash ISA with provider A, 5,000 pounds into a Cash ISA with provider B, and 5,000 pounds into a Stocks and Shares ISA, fully using the 20,000 pound allowance.
Do ISA transfers count against my annual subscription allowance?
No. Moving money between ISA providers (Cash ISA to Cash ISA, or to a different type of ISA) through the ISA Transfer Service does not count against the annual subscription allowance. The saver can transfer any amount of previous-year ISA balances without affecting the 20,000 pound limit. Current-year subscriptions must be transferred in full if transferred at all.
Can I open more than one Cash ISA with the same provider?
Many providers offer multiple Cash ISA products (easy-access, notice account, 1-year fixed, 2-year fixed). A saver can usually subscribe to several of these with the same provider in the same tax year if the provider allows it operationally, although the saver is then exposed to a single provider for FSCS protection purposes. Spreading new subscriptions across more than one provider improves FSCS coverage on larger balances.
What happens if I accidentally subscribe more than 20,000 pounds in a tax year?
HMRC will normally identify the breach in its annual reconciliation. The over-subscription is moved out of the ISA wrapper and any interest earned on the excess is taxable. There is usually no penalty for an honest accidental breach. To correct mid-year, the saver should contact one of the providers and arrange to remove the excess from the ISA wrapper before the year-end.
