TL;DR
- Since 6 April 2024 multiple cash ISAs can be opened with different providers in the same tax year.
- Total subscriptions are still capped at 20,000 pounds across all ISA types combined.
- A saver cannot subscribe to two ISAs of the same type with the same provider in the same year.
- ISA managers report subscriptions to HMRC, removing duplicate-subscription risk for compliant savers.
Last reviewed: May 2026 | Sources: HMRC ISA Manual, HM Treasury ISA reform 2024
Until April 2024, holding two cash ISAs and subscribing to both in the same tax year was a breach of HMRC rules. The 2024-25 reform removed that restriction for cash ISAs and several other ISA types. This guide explains exactly what changed, how the rule works in practice and where the limit still bites for savers using multiple providers in the same year.
The old rule (pre-6 April 2024)
Before 6 April 2024, a saver could subscribe to only one cash ISA per tax year with any provider, regardless of how much was paid in. A saver who opened a cash ISA at Provider A in May and then wanted to chase a better rate at Provider B in October had two unattractive choices: leave the new rate alone, or transfer the entire balance to Provider B (which was permitted as a transfer-in rather than a new subscription).
The old rule applied separately to each ISA type. A saver could open one cash ISA, one stocks and shares ISA and one Lifetime ISA in the same year and subscribe to each, but no two of the same type.
The new rule (from 6 April 2024)
From the start of the 2024-25 tax year, HMRC permits multiple subscriptions to cash ISAs, stocks and shares ISAs and Innovative Finance ISAs with different providers in the same tax year. A saver can now open two, three or more new cash ISAs in the same tax year and pay into each, subject only to the overall 20,000 pound annual cap. The Lifetime ISA continues to permit only one subscription per tax year per saver.
The reform was announced in the Autumn Statement 2023 and the technical detail is set out in the HM Treasury policy paper on gov.uk. For practical guidance on which variable-rate cash ISAs are FSCS-eligible, the easy access cash ISA guide on Kael Tripton covers provider mechanics in detail.
RELATED GUIDES: ISA Rules and Allowances
- How Many ISAs Can I Have?
- How Much Can You Put in an ISA?
- What Is a Cash ISA?
- How to Transfer an ISA 2026
- ISA Accounts UK: All Types Compared
- Easy Access Cash ISA UK 2026
The 20,000 pound cap still applies
The total amount paid into all ISAs in a single tax year is still capped at 20,000 pounds. Opening two cash ISAs does not double the allowance. A saver can pay 10,000 pounds into each of two cash ISAs, or 5,000 pounds into one and 15,000 pounds into another, or any split that totals 20,000 pounds or less.
The Lifetime ISA sub-limit of 4,000 pounds still counts towards the 20,000 pound cap. The IFISA and stocks and shares ISA share the same pool. Spreading across multiple cash ISAs does not interact with the LISA sub-limit beyond the overall cap.
RELATED GUIDES: Related ISA guides
- Best easy access cash ISA UK rates
- How many ISAs can be held over a lifetime
- How much can be paid into an ISA each tax year
- How to transfer an ISA between providers
Practical use cases for multiple cash ISAs
Two main reasons drive savers to use more than one cash ISA in a single tax year. The first is FSCS protection: spreading large balances across institutions keeps each pot inside the 85,000 pound per-institution limit. A saver subscribing the full 20,000 pounds may also have several prior-year ISA balances at other providers, and a fresh second-provider ISA can sit alongside those existing pots.
The second is rate-chasing without disturbing existing balances. Before April 2024 a saver who had used their cash ISA subscription early in the year had to transfer to capture a better rate, which involved paperwork and sometimes break costs. From 2024-25 the same saver can simply open a new cash ISA at the better-rate provider and route fresh subscriptions there. The existing ISA continues to earn at its rate until the saver chooses to move it. The easy access cash ISA shortlist is built around AER comparisons that make rate-chasing more straightforward.
What still is not allowed
Two restrictions remain. First, a saver cannot subscribe to two cash ISAs at the same provider in the same tax year: provider rules require a single account per saver per type per year, even after the reform. Second, the Lifetime ISA is still capped at one per saver per tax year, with the 4,000 pound sub-limit. Junior ISAs are also limited to one Junior cash ISA and one Junior stocks and shares ISA per child at any time.
HMRC reporting and duplicate-subscription risk
ISA managers report all subscriptions to HMRC on an annual basis. A saver does not need to self-report ISA holdings or subscriptions. HMRC monitors aggregate subscriptions across providers using the manager returns and will flag breaches of the 20,000 pound cap. For honest savers keeping a running tally, the practical risk of accidental over-subscription is low so long as a simple year-to-date total is maintained.
Disclaimer: This guide is general information about UK ISA subscription rules and is not personal financial advice. Tax treatment depends on individual circumstances and may change. Anyone unsure about the rules should check gov.uk directly or speak to a regulated financial adviser.
Frequently Asked Questions
Can a saver pay into three cash ISAs in the same tax year?
Yes, since 6 April 2024, provided all three are with different providers and the total subscribed is no more than 20,000 pounds across all ISA types combined.
Can a saver open two cash ISAs at the same bank?
No. Even after the 2024-25 reform a saver may not subscribe to two cash ISAs at the same provider in the same tax year.
Does opening a second cash ISA reset the 20,000 pound allowance?
No. The 20,000 pound annual cap is per saver, not per ISA. Opening more accounts does not increase the total that can be subscribed.
Are stocks and shares ISAs covered by the same reform?
Yes. Multiple subscriptions per tax year are now also permitted for stocks and shares ISAs and Innovative Finance ISAs. The Lifetime ISA is the exception and remains one per tax year.
Will HMRC know about all the subscriptions?
Yes. ISA managers report subscriptions to HMRC. There is no requirement for the saver to self-report.
How This Guide Was Verified
The 2024-25 reform detail is taken from the HM Treasury policy paper on gov.uk and the HMRC ISA Manual. FSCS protection mechanics are sourced from fscs.org.uk. All linked sources were checked against the current published version as of May 2026.
